Method to control operation of multicylinder internal combustion engine

FIELD: mechanical engineering.

SUBSTANCE: invention relates to methods of control of multicylinder internal combustion engines. Invention provides possibility of improvement of method of matching of torques developed by pistons in separate cylinders at small and at considerable duration of injection and at operation of engine both under first and second conditions. Proposed method of control of operation of multicylinder internal combustion engine, mainly, internal combustion engines with direct injection of fuel, comes to injection of fuel into combustion chamber of said engine through valve nozzle at compression stroke under first operating conditions and at intake stroke under second operating conditions. Change-over between said operating conditions is provided and torques developed by pistons in separate cylinders of internal combustion engine are relatively matched. Matching of torques developed by pistons in separate cylinders is provided under first operating conditions by means of governor. Values of correction factors (r_ik) required for correction of mismatching of torques (M_f_ik) developed by pistons in separate cylinders (i) are determined in several operating points (k) and preserved, and basing on these injection parameters correction factors (r_ik), values of static mismatch (q_stat) and dynamic mismatch (q_dyn) of fuel flow rate through valve nozzle are found. Basing on obtained mismatch values (q_stat, q_dyn) of fuel flow rate through valve nozzle, amount of fuel injected into combustion chamber is corrected. Control unit for internal combustion engine, first of all, for internal combustion engine with direct injection of fuel, has combustion chamber into which fuel can be injected through valve nozzle, and regulator providing at least under first operating conditions, matching of torque developed by pistons in separate cylinders. Control unit provides change-over of indicated operating conditions.

EFFECT: improved matching of torque developed by pistons in separate cylinders.

10 cl, 3 dwg

 

The level of technology

The present invention relates to a method of controlling the operation of multi-cylinder internal combustion engine (ice), especially internal combustion engines with direct fuel injection, and the injection of fuel into the combustion chamber of this engine through the valve nozzle carried out on the compression stroke in the first mode of operation and the suction stroke of the second operation mode, and perform switching between these modes and mutually agree torques developed pistons in the individual cylinders of the internal combustion engine with the specified approval of the torque developed by the piston in each cylinder, is carried out in a first mode of operation using a controller. The invention further relates to internal combustion engines, especially internal combustion engines with direct injection of fuel with the combustion chamber with the possibility of injecting the fuel through the valve nozzle on the compression stroke in the first mode of operation and the suction stroke of the second operation mode, the control unit enables you to switch between these modes, and the controller providing at least in the first mode of operation approval torque developed pistons in separate cylinders. In addition, the invention relates also to the control unit for such internal combustion engines.

Such systems are directly itry the swinging of the fuel in the combustion engine are well known. While such systems can operate in two modes, the first of which is the so-called layer-by-layer mode with carburetion (with layer-by-layer distribution of the fuel charge and the second mode with a homogeneous mixture formation (with a uniform distribution of the fuel charge). Mode with layer-by-layer mixing processes is used primarily in the range of small loads, and the mode with a homogeneous mixture formation is used when the internal combustion engine in the range higher loads. In layer-by-layer by mixing the fuel is injected into the combustion chamber of the internal combustion engine on the compression stroke so that the timing of the cloud of fuel (i.e. sprayed droplets of fuel) is located near the spark plugs. In this case, the injection process can occur in different ways. So, for example, fuel can be injected so that already in the process of injection, respectively, immediately upon completion of the injection process is a "cloud" of injected fuel was near the spark plug, providing its ignition. Another possibility is that the "cloud" of injected fuel is first supplied to the spark plug by carefully move the battery to the spark and then ignited. In both the above embodiments, the fuel distributed is carried out in the charge is not evenly and in layers.

The advantage of layer-by-layer mixing is that at an exceptionally low fuel consumption, it provides the opportunity to bestow the required engine in the range of low load capacity. However, in the range of higher loads mode with layer-by-layer mixing processes does not allow the engine to develop the necessary capacity.

Therefore, pursuant to internal combustion engines in this range of high load mode to the homogeneous mixture formation fuel is injected in the suction stroke of the working cycle of the internal combustion engine that provides the turbulence of the fuel and therefore its effective distribution throughout the volume of the combustion chamber. In this respect, the mode with a homogeneous mixture formation essentially corresponds to the conventional principle of operation of the internal combustion engine based on the injection of fuel into the intake manifold. If necessary, the mode with a homogeneous mixture formation can be used in the range of lower loads.

In layer-by-layer mixing processes throttle valve installed in leading to the combustion chamber intake manifold, almost fully open, and the control and/or regulation of the process of ignition and combustion of the mixture is carried out mostly by varying the quantity of fuel to be injected. In homogeneous sociopath is the opening angle, accordingly, closing of the throttle is changed depending on the required torque, which aims to develop the engine, and control and/or regulation of the quantity of fuel to be injected is carried out depending on the amount inhaled in the air cylinder.

In both modes, i.e. the mode with layer-by-layer mode with a homogeneous mixture formation, control and/or regulation of the quantity of fuel to be injected should be implemented taking into account a large number of other operating parameters to obtain optimal value from the point of view of fuel economy, emission control (EXHAUST gas) and other factors. Such control and/or regulation, which differs in each of the two modes of operation, performs a control unit, which is equipped with internal combustion engines.

The internal combustion engine with direct injection, the fuel is typically injected into their combustion chamber under high pressure through the valve nozzle. When this same type of valve nozzles are characterized by a certain range of values of the opening pressure, due to manufacturing tolerances and wear. Since, however, the valve nozzles installed on the engine, loaded with the same injection pressure prevailing in the overall fuel high-pressure accumulator, fuel is priscialla in different combustion chamber in various quantities, which leads to irregular combustion engine, the increased toxicity of the emitted EXHAUST gas and increase fuel consumption.

From the application DE 19828279 known means of co-ordination or coordinate the operation of the pistons of the individual cylinders of the multicylinder internal combustion engine, to compensate due to manufacturing tolerances and wear of the differences in the characteristics of fuel through the valve nozzle used for the injection of fuel under high pressure. When this torque developed pistons in the individual cylinders of the internal combustion engine mutually agree on (i.e. lead to a single value) by varying the amount of fuel injected into the respective combustion chamber. Create all the separate pistons of cylinders maximum uniform torque has a positive effect on the smooth operation of the internal combustion engine on the indicators of emissions and fuel consumption.

In accordance with DE 19828279 A1 will be provided for each cylinder designed to regulate proactively multivariate characteristic, which is determined adaptively during operation of the engine. In layer-by-layer mixing processes coordination torque developed pistons in the individual cylinders of the internal combustion engine is ensured by the regulator, this is used to control the pre-emption of the multivariate feature can be used to reduce the load on the regulator, used to reconcile torque developed pistons in the individual cylinders of internal combustion engines, and to improve dynamic performance. In a homogeneous mixture formation for this multivariate characteristic is determined by a correction coefficient used for correcting the duration of the injection. Mode with homogeneous mixing an output signal of the regulator has a constant time value, i.e. the controller is passive, and the adjustment control torque developed pistons in the individual cylinders of the internal combustion engine is carried out only on the basis of the values selected by multiparameter characterization.

However, according to the application DE 19828279 A1-driven coordination torque developed pistons in the individual cylinders of the internal combustion engine in a homogeneous mixture formation takes place only with regard to static misalignment of fuel through different nozzles, i.e. the analysis focuses only cycles injection of long duration. The results of the dynamic error of discharge is not counted. As a result, the misalignment of the torque developed by the piston of the individual cylinders can be adjusted only when a significant duration of injection, i.e. in cases when the internal combustion engine must develop high torque is to work with high load. In contrast, when short duration of injection, such as during idling of the internal combustion engine is not ensured sufficient degree of compensation for misalignment of the torque, which leads to irregular combustion engine.

Based on the foregoing, the present invention was based on the task to improve the way of reconciliation torque developed pistons in the individual cylinders of the internal combustion engine in such a way as to ensure the correction of the misalignment of the torque developed by the piston of the individual cylinders, and small, and in the long duration of injection, and using the engine as in the first and second modes.

In accordance with the invention in the manner specified in the beginning of the description of this task is solved by the fact that:

- define a few operating points and retain the values intended for the correction of the parameters of the injection correction factors to correct for misalignment of the torque developed by the piston in each cylinder,

on the basis of these intended for correction of the injection correction factors determine the magnitude of the static and dynamic misalignment of fuel through the valve nozzle, and

on the basis of the obtained the values of the error of the fuel through the valve nozzle adjusting the amount of injected into the combustion chamber fuel.

Advantages of the invention

Thus, according to the invention serves to first define a few operating points intended for correction of the injection correction coefficient for each cylinder of the engine. The working point of the internal combustion engine is determined, in particular, the number and composition of the working mixture, filling the cylinder. Then these correction factors after their definitions are stored in memory.

The main reason for the misalignment of the torque developed by the piston of the individual cylinders of the internal combustion engine is in the range of parameters of the individual valve nozzles, especially in the variation of fuel through them. Thus, the misalignment values of fuel consumption accurately reflect the misalignment torque developed pistons in separate cylinders. According to the invention, which is effectively used such a relationship, on the basis of the stored correction factors, intended for the correction of the injection parameters, first, during normal operation of internal combustion engine using a layer-by-layer and/or a homogeneous mixture formation define the mismatch value of fuel through the valve nozzle. Then to reconcile the torque developed by the piston of the individual cylinders, based on the identified Rassul is aavani fuel flow through the valve nozzle adjusting the amount of injected into the respective combustion chamber fuel.

Under static misalignment refers to the amount installed in a static state when fully open the valve in the nozzle deflection of the flow through it of fuel from the nominal value. Dynamic misalignment is defined as the value of establishing a static deviation of consumption plus the amount of the variances in dynamics when opening and closing the valve nozzle. On the amount of fuel injected into the combustion chamber of the cylinder through the valve nozzle, and thereby to develop the piston of this cylinder torque decisive influence mainly provides the value of the dynamic error of the fuel through the corresponding nozzle.

Due to the fact that according to the invention on the basis of the stored correction factors, intended for the correction of the injection parameters, determine the magnitude of not only static, but also dynamic mismatch of fuel through a separate valve injector combustion engine and consider these values for correction of the quantity injected into the combustion chamber of the fuel, at any operating point of internal combustion engine provides smooth and uniform operation as in mode with layer-by-layer, and in the mode with a homogeneous mixture formation.

In accordance with one of the preferred options, the ants implementation of the present invention intended for the correction of the parameters of the injection correction factors proposed to determine only in the first operation mode, i.e. using a layer-by-layer mixing processes. Thus, in layer-by-layer mixing processes misalignment torque developed by the piston of the individual cylinders, fully compensated for by the controller, coordinating or matching operation of the pistons of the individual cylinders. There is a proportional relationship between the quantity of fuel to be injected and develop the internal combustion engine torque. Issued by the regulator regulating effect correspond to the correction coefficient used for correction of the injection parameters. Thus, in the layer-by-layer mode with carburetion correction factors can be determined with very high precision, which allows you to completely eliminate differences in torque created by the pistons of the various cylinders of the engine.

In accordance with another embodiment of the invention intended for the correction of the parameters of the injection correction coefficient for individual cylinder is proposed to determine in the first and second modes of operation, i.e. in the regime with homogeneous mixing. The above control system, designed to coordinate or harmonize the work of the pistons of the individual cylinders, the effective mode only with layer-by-layer mixing processes, since in Homo the military carburetion not by a proportional relationship between the amount of fuel to be injected and torque. However, in this case, can be used in adaptive control, allowing a relatively large step to reduce, preferably to zero, the misalignment torque. When it is determined necessary for this correction factor designed to adjust the parameters of the injection. Using adaptive control method that corrects the injection parameters in each case only for two cylinders with the highest values of the error, reduces the scatter in the values of the quantity of fuel that can be injected into the individual cylinders, and thus the scatter in the values of torque produced by the piston of the individual cylinders.

Although intended for the correction of the parameters of the injection correction factors defined in the mode with a homogeneous mixture formation, are less accurate compared with the correction coefficients defined in layer-by-layer mixing processes, however they are due to the combustion of the working mixture with excess air coefficient equal to 1, have higher reliability, reliability, or otherwise primarily as increasing the wear of the engine.

If information about an individual for each cylinder of the excess air coefficient mismatch to Utada moments can be compensated with the help of the regulator mode with homogeneous mixing. It should be noted that in contrast to the mode with layer-by-layer mixing processes in a homogeneous mixture formation, the relationship between the injection quantity and develop the internal combustion engine torque is not linear.

In accordance with the following preferred embodiment of the present invention on the basis intended for correction of the injection correction coefficients determined in the first mode of operation, and intended for the correction of the parameters of the injection correction factors defined in the second mode of operation, it is proposed to determine the total static and dynamic misalignment of consumption and on the basis of this value to perform the correction quantity injected into the combustion chamber of the fuel. The total value of the error of the flow rate can be determined on the basis intended for correction of the injection correction factors using various mathematical operations or operations. As an example, such operations can be called averaging, weighting or filtering of the values of these correction factors.

Total mismatch value of the flow rate can be determined on the basis of the correction factors in different ways. For example, the total velicina.stanovi the error of the flow rate can be determined on the basis of the values of static mismatch consumption, obtained using a layer-by-layer mode with homogeneous mixing. Similarly on the basis of the values of the dynamic error of the flow rate obtained using a layer-by-layer mode with a homogeneous mixture formation, it is possible to determine the overall value of the dynamic error of the flow rate. In another embodiment, to determine the total amount of static, the dynamic mismatch consumption can be used and the values for static and dynamic values of the error flow.

Another possibility to determine the total error of the flow is used as an overall measure of the error of the flow rate obtained using a layer-by-layer mixing processes values of static and dynamic misalignments flow if certain mode with layer-by-layer, respectively, in a homogeneous mixture formation values of the error flow in a first approximation, the same. If the values mismatch consumption obtained using a layer-by-layer, respectively, in a homogeneous mixture formation, are not the same, as the total value of the error of the flow rate values are used for static and dynamic misalignments of consumption obtained using a homogeneous mixture formation. Although in the latter case exists in which the probability is not fully compensate for the misalignment torque develop pistons of each cylinder, however, such values are much more reliable compared with the values of the error of the flow rate obtained using a layer-by-layer mixing processes, and therefore, they should give preference to.

In accordance with another preferred embodiment of the invention for approval torque developed by the piston in each cylinder, as intended for the correction of the parameters of the injection correction factors proposed to use the regulatory impact of the regulator, is required for correction values of the error torque developed by the piston of the individual cylinders. While defining and storing correction factors intended for correction of the injection, is known from the application DE 19828279 A1 way. In this regard, this publication DE 19828279 A1 included in the present description by reference.

In accordance with the following preferred embodiment of the invention for the correction of the quantity injected into the combustion chamber fuel is proposed to vary the duration of fuel injection valve nozzle. In this case, on the basis of both defined for each cylinder of the amendments, i.e. the magnitudes of the way the definition and value of the dynamic error flow adjusts the amount of fuel injected through the corresponding valve nozzle. Thus each of the values of the duration of injection is adjusted by multiplying the magnitude of the static error of the flow rate and by adding the value of the dynamic error of the flow.

The obtained values intended for the correction of the parameters of the injection correction factors used to reconcile torque developed by the piston of the individual cylinders, it is preferable to store in the form of multivariate characteristics. Such multiparameter characteristics are preferably stored in a memory of the control unit of the engine. Such multiparameter characterization reflects the dependence of the correction factors, first, the rotation speed of the internal combustion engine and, secondly, from developing this engine torque. During combustion, the control unit may in this case to turn to its stored correction factors used for adjustment of injection, to determine values corresponding to the mismatch of fuel through a separate valve nozzle and accordingly adjust the amount of fuel injected into the combustion chamber.

According to the following predpochtite is linoma variant implementation of the invention in the long duration of injection corresponding to the working point correction factor, designed for the correction of the injection parameters, it is proposed to use as the values for static misalignment of consumption. For large values of duration of injection, this correction factor allows to obtain a reliable value of the static mismatch consumption, because the influence of the dynamic of the error, i.e. the error caused by the characteristics of the opening and closing valve of the injector, with the increase in the duration of injection is reduced.

Similarly, in accordance with another preferred embodiment of the invention at low injection duration corresponding to the working point correction factor designed to adjust the parameters of the injection, it is proposed to use as the value of the dynamic error of the flow rate. This possibility is due to the fact that with decreasing the duration of the injection, i.e. reduction of the period of time during which the valve nozzle open, respectively closed, the influence of the dynamic mismatch for a total mismatch of fuel through the nozzle increases.

Proposed in the invention, the solution allows you to expand manufacturing tolerances on the valve nozzle. So the option created by an individual for each cylinder defining characteristic of each of the valve nozzle and accounting of these characteristic features in coordination or consultation torque developed by the piston of the individual cylinders. In addition, in the correction of misalignments torque developed by the piston of the individual cylinders, according to the invention also takes into account the magnitude of the dynamic mismatch fuel flow through the corresponding valve nozzle, especially at low injection duration to fully compensate for misalignment of the torque developed by the piston of the individual cylinders.

Of particular importance is the implementation proposed in the invention method based control designed for control of internal combustion engines, especially internal combustion engines with direct fuel injection. In memory of this element is stored a program for executing in a computing device, especially in the microprocessor control unit and intended for carrying out the invention method. Thus, in this case, the proposed invention the solution is implemented using a stored control program, and therefore, such a control with its program is one of the objects of the invention are similar to the above method, for which designed this program. As a control, you can use is to first electric storage device, for example, a persistent storage device (ROM) or flash memory.

In respect of the internal combustion engine indicated at the beginning of the description of the type supplied in the invention the problem is solved due to the fact that its control unit allows

- to be defined in several operating points and save the values intended for the correction of the parameters of the injection correction factors to correct for misalignment of the torque developed by the piston in each cylinder,

- to determine the values of static and dynamic misalignment of fuel through the valve nozzle on the basis of these intended for correction of the injection correction value and

- to adjust the amount of injected into the combustion chamber of the fuel on the basis of the obtained values of the error of the fuel through the valve nozzle.

In addition, the attitude control unit, designed for internal combustion engines specified in the beginning of the description of the type delivered to the invention the problem is solved due to the fact that this control unit allows

- to be defined in several operating points and save the values intended for the correction of the parameters of the injection correction factors for correcting misalignment torques, RA is livemix pistons in separate cylinders

- to determine the values of static and dynamic misalignment of fuel through the valve nozzle on the basis of these intended for correction of the injection correction value and

- to adjust the amount of injected into the combustion chamber of the fuel on the basis of the obtained values of the error of the fuel through the valve nozzle.

The correction factors intended for correction of injection, it is preferable to use the regulatory impact of the regulator to ensure harmonization torque developed pistons in separate cylinders.

Drawings

Below the invention is described in more detail by the example of the preferred variants of its implementation with reference to the accompanying drawings on which is shown:

figure 1 - schematic representation of the preferred option implementation proposed in the invention of the internal combustion engine

figure 2 is another schematic depiction of the internal combustion engine of figure 1, and

figure 3 - preferred option implementation proposed in the invention the control unit.

Description of embodiments of the invention

1 schematically shows installed on the vehicle engine 1, the internal combustion engine with direct injection the top of the willow, in the cylinder 3 which, with the possibility of reciprocating movement is set piston 2. The internal combustion engine 1 has a cylinder z 3. In each of the cylinder 3 has a combustion chamber 4, which is limited, in particular, a piston 2, an intake valve 5 and exhaust valve 6. The inlet valve 5 controls the connection of the cylinder with the intake manifold 7 and an exhaust valve 6 is controlled by its connection with the exhaust manifold 8.

In the area of the intake valve 5 and exhaust valve 6 into the combustion chamber 4 are valve nozzle 9 and the spark plug 10 of the ignition. Valve nozzle 9 is used for the injection of fuel under high pressure into the inlet pipe 7. Candle 10 ignition is designed for ignition submitted to the chamber 4 of the fuel combustion. The injection of fuel into the combustion chamber 4 can occur on the compression stroke when the operation of the internal combustion engine in the first mode (mode with layer-by-layer mixing processes) and on the suction stroke of when operating the internal combustion engine in the second mode (mode with homogeneous mixing). Switching between both of these modes can occur during operation of the internal combustion engine 1.

As a result of expanding gases generated by the combustion of fuel in the combustion chamber 4, the piston 2 is driven in a reciprocating motion which is transmitted to the crankshaft 11 (see figure 2) and develops on the last torque M_ik.

On the crankshaft ontroller toothed disk 12, the angular position of which is registered by the sensor 13. The cylinder 3 is another sensor 14, which, for example, registers the piston 2 reaches the top dead center (TDC), which separates two working four-stroke cycle internal combustion engine. The signals issued by the sensors 13 and 14 are received by the control unit 15, which in the operating point k internal combustion engine 1 generates a command pulse t_ik on injection, providing actuation of the valve nozzle 9 in one of the cylinders i (i=l,...z). The parameters defining the operating point k, include, in particular, the amount and composition of the working mixture, filling the cylinder.

The internal structure of the control unit 15 is schematically shown in figure 3. In this case, the control unit 15 is known from DE 19828279 A1 way with their respective controls R_i (i=l,...z), for example, proportional-integral controllers (PI regulator), for each of the cylinders i of internal combustion engine 1 are formed values r_ik correction factors intended for correction of the injection parameters. In this regard, this publication DE 19828279 A1 included in the present description by reference. The signals from sensors 13,14 cylinder i received these regulators R_i.

These correction factors r_ik intended for the correction of the injection parameters represent the coefficients required to correct raccoglitore the M_f_ik torque develop pistons in separate cylinders i of internal combustion engine 1. The obtained values of these correction factors r_ik are saved individually for each cylinder multiparameter characterization K_i (i=l,...z) in function of the working point. To determine the operating point k such multiparameter characteristics K_i establish the dependence of the output parameter from two or more input parameters, which in this case are the speed n_k and torque M_k combustion engine 1.

Correction factors r_ik intended for the correction of the injection parameters are determined for each cylinder i when operating the internal combustion engine as in layered and homogeneous mixing. In layer-by-layer mixing processes misalignment M_f_ik torques on individual cylinders fully offset by a corresponding regulator R_i. There is a proportional relationship between the quantity of fuel to be injected and develop the internal combustion engine 1 torque M_k. Issued by the regulator R_i regulatory impact correspond with the correction coefficient r_ik intended for the correction of the injection parameters. Thus, in the layer-by-layer mode with carburetion adjustment factors r_ik can be determined with very high precision, which allows you to completely eliminate differences M_f_ik the torque, created different pistons of the cylinders i of internal combustion engine 1.

The above control system is effective only for the mode with layer-by-layer mixing processes, as in the mode with a homogeneous mixture formation not by a proportional relationship between the amount of fuel to be injected and torque M_k. However, in this case, can be used in adaptive control, allowing a relatively large step to reduce, preferably to zero, the error term M_f_ik torque. When it is determined necessary for this correction factor r_ik designed for the correction of the injection parameters. Despite the fact that such correction factors r_ik defined in the mode with a homogeneous mixture formation, are less accurate, however, they are due to the combustion of the working mixture with excess air coefficient equal to 1, have higher reliability, reliability, or otherwise.

If information about an individual for each cylinder of the excess air coefficient mismatch M_f_ik torque can be compensated by using a regulator R_i and with homogeneous mixing until a value of the air excess factor, approximately equal to 0.85. It should be noted that in contrast to the layer-by-layer mode with sociopath is of mode with a homogeneous mixture formation, the relationship between the injection quantity and develop the internal combustion engine 1 torque M_k is nonlinear.

After this, on the basis intended for correction of the injection correction factors r_ik functional unit 17 determines the magnitude of the static q_stat and dynamic q_dyn mismatch costs. When operating the internal combustion engine 1 with layer-by-layer mixing processes mismatch value q_stat, q_dyn costs are determined based on the values generated by the regulators R_i correction factors r_ik intended for the correction of the injection parameters. When operating the internal combustion engine 1 in a homogeneous mixture formation such correction factors r_ik are determined for each of the operating points of k by multiparameter characterization K_i. Switching between modes with layer-by-layer mixing processes (position "S") and homogeneous mixing (position "H") is carried out by switches 18. The switches 18 is performed on the corresponding control signal issued by the control device 19 of the control unit 15. This control device 19 determines the operating mode of the internal combustion engine 1 depending on various operating parameters 20 of internal combustion engine 1.

In accordance with the invention, at considerable length t_ik injection of a suitable working point k is intended for adjustment of the injection correction factor r_ik used in F. the purpose ground receiving stations block 17 as the value of the static mismatch q_stat flow, because the dynamic misalignment q_dyn consumption with increasing duration t_ik injection, i.e. increasing the time during which the valve nozzle 9 open, respectively closed, decreases. When short duration t_ik injection of a suitable working point k is intended for adjustment of the injection correction factor r_ik is used as the value of the dynamic mismatch q_dyn consumption, because the effect of static mismatch q_stat flow is shortened t_ik injection, i.e. reduction of the period of time during which the valve nozzle 9 remains open is reduced.

On the basis of obtained for each cylinder of the first values of the correction coefficients r_ik device 21 of the processing unit 15 of the control determines the amount by which the adjusted duration t_ik injection for a specific cylinder i at a specific operating point k. In other words, each of the calculated values of the duration of injection is adjusted by multiplying the magnitude of the static mismatch consumption q_stat, respectively by adding the value of the dynamic error q_dyn consumption. In addition, the device 21 processing the obtained values t_ik injection may be subjected to filtering or regulation.

Thus, in accordance with the above approach first defines intended for correction of the injection correction factors r_ik. In layer-by-layer mixing processes, as well as in the mode with homogeneous mixing, until the size of the air excess factor equal to 0.85, the mismatch value M_f_ik torque decrease control R_i to zero. When this is issued by the regulator R_i impact match intended for correction of the injection correction coefficients r_ik. When operating in mode with layer-by-layer mixing processes between the injection quantity and develop the internal combustion engine torque, there is a proportional relationship, and with homogeneous mixing, until the size of the air excess factor equal to 0.85, there is a nonlinear relationship. Designed for the correction of the parameters of the injection correction factors r_ik stored in the memory unit 15 controls in the form of individual for each cylinder multiparameter characteristics K_i.

When operating the internal combustion engine 1 on the basis of the correction coefficients r_ik stored in memory in the form of multiparameter characteristics K_i for a particular operating point k, is defined values for static q_stat and dynamic q_dyn rassol the harmonization of consumption. Then depending on these values the error q_stat, q_dyn flow is adjusted quantity injected into the combustion chamber 4 of the fuel, allowing the piston of each of the cylinders i, regardless of the degree of error or inconsistency inherent in each individual valve of the injector 9, and develops the same torque M_ik, which positively affects the smoothness of the internal combustion engine 1 in the indicators of the toxicity of EXHAUST emissions and fuel consumption.

Proposed in the invention, the solution allows you to expand manufacturing tolerances on the valve nozzle 9. Such an opportunity is created due to the fact that in the correction of misalignments M_f_ik torque values are also taken into account dynamic mismatch q_dyn consumption, as well as thanks individually for each cylinder defining characteristic of each of the valve nozzle 9 of the internal combustion engine 1 and accounting of these characteristic features under the coordination or harmonization of torque developed pistons in separate cylinders.

1. The method of controlling the operation of multi-cylinder engine (1) internal combustion, especially combustion engine with direct fuel injection, and the injection of fuel into the chamber (4) of this combustion engine via a valve nozzle (9) is carried out on the compression stroke in the first mode of operation and n is the suction stroke of the second operation mode, and carry out the switching between these modes and mutually agree torques developed pistons in the individual cylinders of the internal combustion engine with the specified approval of the torque developed by the piston in each cylinder, is carried out in a first mode of operation using a controller, wherein the determined at several operating points (k) and store the values intended for the correction of the parameters of the injection correction factors (r_ik)required for correction of the error (M_f_ik) torque developed by the piston in each cylinder (i), on the basis of these intended for correction of the injection correction factors (r_ik) determine values for static (q_stat) and dynamic (q_dyn) mismatch of fuel through the valve nozzle (9) and based on the obtained values of the error (q_stat, q_dyn) fuel flow through the valve nozzle (9) adjusting the amount of injected into the chamber (4) combustion of fuel.

2. The method according to claim 1, characterized in that intended for the correction of the parameters of the injection correction factors (r_ik) is determined only in the first mode of operation.

3. The method according to claim 1, characterized in that intended for the correction of the parameters of the injection correction factors (r_ik) determine in the PE the first and second modes of operation.

4. The method according to claim 3, characterized in that on the basis intended for correction of the injection correction factors (r_ik)defined in the first mode of operation, and intended for the correction of the parameters of the injection correction factors (r_ik)defined in the second mode of operation, determine the total static (q_stat) and dynamic (q_dyn) the error of the flow rate and on the basis of this value provide a correction quantity to be injected into the chamber (4) combustion of fuel.

5. The method according to any one of claims 1 to 4, characterized in that for the approval of the torque developed by the piston in each cylinder, as intended for the correction of the parameters of the injection correction factors (r_ik) use of the regulatory impact of the regulator, is required for correction values of the error (M_f_ik) torque developed pistons of each cylinder (i).

6. The method according to any one of claims 1 to 5, characterized in that the correction amount of injected into the chamber (4) combustion vary the duration of the injection.

7. The method according to any one of claims 1 to 6, characterized in that intended for the correction of the parameters of the injection correction factors (r_ik) retain in the form of multiparameter characterization (K_i).

8. The method according to any of p is.1-7, characterized in that in the long duration of injection corresponding operating point (k) correction factor (r_ik)intended for the correction of the injection parameters, are used as values for static misalignment (q_stat) flow.

9. The method according to any one of claims 1 to 8, characterized in that at low injection duration corresponding operating point (k) correction factor (r__ik)intended for the correction of the injection parameters, are used as values of the dynamic mismatch (q_dyn) flow.

10. Unit (15) controls for the internal combustion engine (1), especially for internal combustion engines with direct fuel injection, with the camera (4) combustion with the possibility of injection of the fuel through the valve nozzle (9) on the compression stroke in the first mode of operation and the suction stroke of the second mode of operation and control for at least the first mode of operation approval torque developed pistons in separate cylinders, with this block (15) control allows switching between these modes, characterized in that it allows you to define multiple operating points (k) and save the values intended for the correction of the parameters of the injection correction factors (r_ik)required for correction of the error (M_fik) torque develop pistons in separate cylinders (i), to determine values of the static (q_stat) and dynamic (q_dyn) mismatch of fuel through the valve nozzle (9) on the basis of these intended for correction of the injection correction factors (r_ik) and adjust the amount of injected into the chamber (4) combustion of the fuel on the basis of the obtained values of the error (q_stat, q_dyn) fuel flow through the valve nozzle (9).



 

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The invention relates to a device for recognition of the valve timing in an internal combustion engine

The invention relates to vehicles and in particular to control systems for internal combustion engines a fuel injection and carburetor type, and is intended to prevent unauthorized starting of the engine for theft of the car or other vehicle

The invention relates to an electronic control fuel injection system for internal combustion engines, structurally composed of a Central electronic control unit, the Central processor which interprets the information signals from the sensors registering such basic performance parameters, as the speed of rotation of the motor shaft and the throttle valve that regulates the flow of air into the engine, and the concentration of individual components in the exhaust gas, with the specified Central control unit regulates the mode of injection of the combustible mixture when using preferably one injector

The invention relates to engine and can be used to control the internal combustion engine with raspredelennym sequential fuel injection and spark ignition

The invention relates to engine, in particular to methods and devices for controlling operation of the internal combustion engine (ice) with direct injection of gasoline

The invention relates to engine and can be used in the control system of gas injection in an internal combustion engine

The invention relates to the field of engine development, in particular to a method of controlling the supply of fuel into the cylinders of the internal combustion engine when it start

The invention relates to engine, particularly to fuel control systems diesel

The invention relates to the field of controlling the supply of fuel to the internal combustion engine (ice) and can be used in power systems engines gas or liquid fuel

The invention relates to based on known from U.S. patent 5197438 method control device of fuel injection, providing a supply of high pressure fuel in the fuel high-pressure accumulator, in which the pressure is controlled by valve and from which the fuel is to be injected through the electrically-controlled valve nozzle

The invention relates to free piston internal combustion engines designed to drive linear electric alternators

FIELD: engine engineering.

SUBSTANCE: method comprises supplying fuel to the combustion chamber and burning out fuel in the combustion chamber. The fuel is directly injected into the combustion chambers with the use of valve nozzles during suction or compression stroke depending on the regime of engine operation. The torques generated by cylinders are matched. The device for realization of the method is proposed.

EFFECT: enhanced reliability.

18 cl, 3 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: according to proposed method to control operation of internal combustion engine 1, mainly that used to power a vehicle, fuel is injected into combustion chamber 4 at operation of enriched fuel mixture and lean fuel mixture, and changing over between said operating conditions is provided, carrying out changing over from operation of enriched fuel mixture to operation on lean fuel mixture and vice versa. Moreover, accumulation of nitrogen oxides in catalytic converter 12 is done. Then quality function G is determined presenting efficiency of accumulation of nitrogen oxides in catalytic converter 12 depending on time interval DT at a laps of which operation on enriched fuel mixture is interrupted by catalytic converter 12. Quality function G is determined by several successive time intervals DT and, depending on said quality function G, action is made on process of changing over between above-indicated modes of operation.

EFFECT: provision of correct constant control over process of accumulation and release of nitrogen oxides and/or regulation of said process.

6 cl, 3 dwg

The invention relates to engine, in particular to a method and apparatus control the operation of the internal combustion engine

The invention relates to engine, in particular to methods and devices for controlling operation of the internal combustion engine (ice) with direct injection of gasoline

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: according to proposed method to control operation of internal combustion engine 1, mainly that used to power a vehicle, fuel is injected into combustion chamber 4 at operation of enriched fuel mixture and lean fuel mixture, and changing over between said operating conditions is provided, carrying out changing over from operation of enriched fuel mixture to operation on lean fuel mixture and vice versa. Moreover, accumulation of nitrogen oxides in catalytic converter 12 is done. Then quality function G is determined presenting efficiency of accumulation of nitrogen oxides in catalytic converter 12 depending on time interval DT at a laps of which operation on enriched fuel mixture is interrupted by catalytic converter 12. Quality function G is determined by several successive time intervals DT and, depending on said quality function G, action is made on process of changing over between above-indicated modes of operation.

EFFECT: provision of correct constant control over process of accumulation and release of nitrogen oxides and/or regulation of said process.

6 cl, 3 dwg

FIELD: engine engineering.

SUBSTANCE: method comprises supplying fuel to the combustion chamber and burning out fuel in the combustion chamber. The fuel is directly injected into the combustion chambers with the use of valve nozzles during suction or compression stroke depending on the regime of engine operation. The torques generated by cylinders are matched. The device for realization of the method is proposed.

EFFECT: enhanced reliability.

18 cl, 3 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention relates to methods of control of multicylinder internal combustion engines. Invention provides possibility of improvement of method of matching of torques developed by pistons in separate cylinders at small and at considerable duration of injection and at operation of engine both under first and second conditions. Proposed method of control of operation of multicylinder internal combustion engine, mainly, internal combustion engines with direct injection of fuel, comes to injection of fuel into combustion chamber of said engine through valve nozzle at compression stroke under first operating conditions and at intake stroke under second operating conditions. Change-over between said operating conditions is provided and torques developed by pistons in separate cylinders of internal combustion engine are relatively matched. Matching of torques developed by pistons in separate cylinders is provided under first operating conditions by means of governor. Values of correction factors (r_ik) required for correction of mismatching of torques (M_f_ik) developed by pistons in separate cylinders (i) are determined in several operating points (k) and preserved, and basing on these injection parameters correction factors (r_ik), values of static mismatch (q_stat) and dynamic mismatch (q_dyn) of fuel flow rate through valve nozzle are found. Basing on obtained mismatch values (q_stat, q_dyn) of fuel flow rate through valve nozzle, amount of fuel injected into combustion chamber is corrected. Control unit for internal combustion engine, first of all, for internal combustion engine with direct injection of fuel, has combustion chamber into which fuel can be injected through valve nozzle, and regulator providing at least under first operating conditions, matching of torque developed by pistons in separate cylinders. Control unit provides change-over of indicated operating conditions.

EFFECT: improved matching of torque developed by pistons in separate cylinders.

10 cl, 3 dwg

FIELD: mechanical engineering; engines.

SUBSTANCE: according to proposed method of control of vehicle engine unit depending on preset value of an output parameter of unit, at least one adjustable parameter of engine unit is regulated. Together with preset value, setting time is set during which output parameter should settle at this value. Setting time is preset irrespective of control section used for regulation of at least one adjustable parameter. Vehicle engine unit control device has control unit which regulates at least one adjustable parameter of engine unit depending of preset value of an output parameter of engine unit. Means for regulating adjustable parameter are provided to input of which preset value of output parameter and setting time are supplied as preset values during which output parameter should settle at this value. Setting time of engine unit is preset irrespective of control section used for regulation of at least one adjustable parameter.

EFFECT: provision of matching of different requests for changing any operating parameter of engine unit irrespective of control sections of engine.

11 cl, 10 dwg

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