Method for stabilising electromechanical-transmission-ice minimum specific fuel rate and device to this effect

FIELD: engines and pumps.

SUBSTANCE: invention relates to ICE application in various machines incorporating an electromechanical transmission. The proposed method of stabilising the ICE minimum specific fuel rate by automatically adjusting the ICE operating conditions via a feedback circuit connected to the electromechanical transmission components consists in presetting the engine shaft rpm corresponding to the minimum specific fuel consumption, measuring the said shaft rpm variation at varying outer moment of resistance, comparing the resulted value with the preset one, amplifying the difference signal and feeding it to the AC generator excitation current control circuit input to make the aforesaid moment to comply with that developed by ICE. Note that at the same time, the electric power accumulator output voltage is measured and compared with two preset levels. Given any departure from the aforesaid preset levels, a signal is generated to cut off the ICE in case the voltage exceeds the preset level, or to cut in the ICE in case the measured voltage is lower than the preset one that allows operating the ICE in intermittent service.

EFFECT: stabilisation of minimum specific fuel rate and optimisation of ICE operating conditions at varying electromechanical transmission engine loads, simpler ICE design.

2 cl, 2 dwg

 

The invention relates to the use of internal combustion engines (ice) vehicles and machinery units for various purposes, in particular for vehicles intended for the transport of goods and passengers.

The use of internal combustion engines coupled with Electromechanical transmission received widespread application. In particular, this solution is used on dump trucks BelAZ, tractors, industrial railway transport, trolley buses, hybrid power systems for passenger cars (Nissan, AUDI, etc.) [1, 2, 3].

The energy efficiency of these devices is achieved through the use of the system motor-wheel motor, which provides constant power mode when changing the external load (variable resistance torque on the propeller), in particular a DC motor with series excitation. Thereby achieve stabilization of electric power in the circuit, the current generator - motor motor-wheels". This, in turn, leads to the stabilization of combustion in a given stationary mode of operation, which improves the fuel efficiency of the plant as a whole.

The disadvantage of the considered power plants is that they are not obespechivayuschie maximum use of the internal combustion engine on its external speed characteristic, they also have no possibility of recovery of kinetic energy during deceleration of the internal combustion engine at the command of the driver or when the vehicle downhill.

There is a method of stabilization of minimum specific fuel consumption of the internal combustion engine and device for its implementation, providing at the expense of jobs, the value of the rotation speed of the engine corresponding to the minimum fuel consumption, comparing this value with the value of the permissible deviation of this parameter from the set, above which produce a signal that causes it to shift the transmission, and lead the magnitude of the moment of resistance to a range which provides continuously variable control of frequency of rotation of the output shaft of the variator at a given (constant) speed input (pump) shaft [4], which provides automatic stabilization mode of the internal combustion engine on the basis of feedback frequency the rotation of the engine with the transmission elements.

The last technical solution in its essence is the closest to the proposed and adopted for the prototype. A significant disadvantage of the prototype is that the method of stabilization of minimum specific fuel consumption assumes the existence of a multi-stage transmission and hydro-mechanical transmission, such technical rechenanlagen in design. In the prototype device is also quite complex interrelated control of two mechanical devices: a multi-stage gearbox and a CVT with stepless speed control (in particular, the controlled torque Converter).

The purpose of the invention:

1. Stabilization of minimum specific fuel consumption and optimization of operation mode of the internal combustion engine with the variable nature of the load on the propulsion of a vehicle equipped with Electromechanical transmission.

2. To simplify the design of the vehicle.

The method of stabilization of minimum specific fuel consumption of the internal combustion engine is achieved by automatic control mode of the internal combustion engine based on feedback from the transmission, in a vehicle equipped with Electromechanical transmission including the alternator, rectifier, controlled battery electrical energy, a motor with its control system, so that a signal equal to the difference between the desired and actual engine speeds, enhance and serves on the control input excitation current of the alternator, change its electromagnetic torque, bringing them into compliance with the torque developed internal combustion engines, at the same time seraut the output voltage of the energy storage unit, that could be compared with two preset levels, when the deviation of the measured voltage from the established levels produce a signal for shutting off the combustion engine when the excess voltage above the predetermined upper level or to switch on the engine when the voltage decreases below the preset lower level, enabling the internal combustion engine in an intermittent mode of operation at a constant predetermined load (capacity) during operation.

The proposed method is implemented by the device stabilization of minimum specific fuel consumption of internal combustion engines, fuel injection containing a working body (TPRO), equipped with automatic control mode of the internal combustion engine with the feedback of the transmission elements, the device further comprises an alternator, a rectifier, controlled battery electrical energy, a motor with its control system, the Converter positions TPRO in the reference signal angular frequency of rotation of the output shaft of the internal combustion engine ωasssensor frequency output voltage of the generator, the sensor voltage at the output of the rectifier, the inverter voltage generator output signal and the angular frequency of rotation of the output shaft of the internal combustion engine compares the device with the output signal Δωequal to the differential is ω assand ωa Converter the difference between the desired and actual angular frequency of rotation of the output shaft of the engine, in an appropriate excitation current of the alternator, the system control charge current of the battery, the electric motor which drives the propulsion wheel, a control system of an electric motor including a power Converter with its control system with input signal of the driver, a two-level comparator, which converts the signal at its input the command to disable the internal combustion engine or switching on the internal combustion engine and control system charging current of the battery, and the output of the comparator rotation speed of the internal combustion engine with a preset associated with transducer frequency difference of the rotation signal control voltage of the AC generator and the meter output voltage on the battery is connected with the first inputs of the two-level comparator, the second input of which is pre-set upper and lower levels, the first output of the two-level comparator connected to the input device, the switching-off of the internal combustion engine and the second output of the two-level comparator is connected with the input of the system that manages the charging of the battery and the device that starts the engine.

The proposed method is implemented by the device, a block diagram is presented in figure 1. Figure 2 shows: 1 - external characteristics of the=f(ω ), distinguished on ΔM; 2 - regulatory branch characteristics M=f(ω); 3 : the regulatory branch characteristics q=f(ω); 4 - external characteristics q=f(ω), where M and ω accordingly, the torque on the shaft and the rotational speed of the internal combustion engine, q is the specific fuel consumption of the engine.

The device (1) contains the unit 1 fuel supply body with the output signal h1, the inverter 2 of the fuel injection position of the body in the reference signal angular frequency of rotation of the output shaft of the internal combustion engine ωasscomparing device 3 with the output signal Δωequal to the difference between ωassand ω, engine 4, the alternator 5, a rectifier 6, the Converter 7 the difference between the desired and actual angular frequency of rotation of the output shaft of the engine, in an appropriate excitation current of the alternator, the sensor 8 frequencies and voltages, including sensor 8.1 frequency of the output voltage of the generator 5, the sensor values 8.1 output voltage of the rectifier 6, the control system 9 charging current of the battery 10, the control system electric motor 11 includes a power Converter 11.1 with its control system 11.2 with the input signal h2 of the driver, the electric motor 12, an inverter 13 the frequency of the output voltage of the generator signal is l, the angular frequency of rotation of the output shaft of the internal combustion engine ω bi-level comparator 14, which converts the signal at its input the command to disable the internal combustion engine or switching on the internal combustion engine and control system charging current of the battery.

The principal distinguishing feature of the proposed method is that the stabilization of the mode of operation of the engine, in contrast to the prototype is not due to the controlling influence on the transmission elements, and by converting mechanical energy from the internal combustion engine into electric power savings and operating expense of its electric motor and by controlling the accumulation of electrical energy through the system of automatic control of the generator of electrical energy, operated by the battery, which ultimately provides the ice near the external speed characteristics with prescribed regime parameters.

In this regard, the claimed technical solution in contrast to the prototype instead managed hydro-mechanical transmission comprises a generator of alternating current sensor voltage frequency AC generator (speed sensor), rectifier, controlled battery electrical energy, a motor with its control system, the device comparing the measured speed with a pre-specified, and the first input of the comparison ass is Noah and the measured frequency of rotation is connected to the sensor output frequency of rotation, second input of the comparator connected to the output of the AC generator, the output of the comparator of the frequency of rotation is connected to the input of the amplifier that controls the excitation current of the alternator.

These differences allow to draw a conclusion on the conformity of the proposed technical solution the criterion of "Novelty". The features distinguishing the claimed technical solution to the prototype, not identified in other technical solutions in the study of this and related areas of technology, therefore, provide the claimed technical solution according to the criterion of "Significant differences".

When the search process is known solutions have not been identified characteristics that match the distinctive features of the prototype of the features of the proposed device. Therefore, the claimed invention meets the condition of "inventive level".

The device operates as follows.

The rotation speed and torque (load) of the internal combustion engine corresponding to the minimum fuel consumption are determined by setting the rotation frequency at the input of a control system of an alternating current generator. When the deviation of the rotation speed from a given change in the output voltage of the generator, which in turn changes the voltage on the battery and fire control battery charging is A.

With the help of block 1 (see figure 1) is set to a certain position, close to the maximum fuel injection body (TPRO) (choke in the carburetor of the internal combustion engine system that sets the spring tension is fully integrated centrifugal pump regulator in diesel engine and the like). The signal h1 provisions TPRO supplied to the generator 2 speed, which sets the specified ωassin accordance with the external speed characteristic (see figure 2), the rotational speed of the internal combustion engine 4, which is provided close to the minimum specific fuel consumption.

The change of the torque on the shaft of the electric motor 12 driving wheel due to changes in road conditions or driver input (signal h2), as well as movement with a constant moment of resistance causes a change in the energy consumed by the motor from the battery 10, resulting in lower voltage at its output.

In case of exceeding the upper level, which indicates the battery is fully charged, the relay element outputs a signal for stopping the internal combustion engine. At this time, the system of automatic control of the electric motor draws power only from the battery, draining the accumulated them energy, which leads to reduction in voltage in an electrical circuit. The presence of the phase "rest" ice also what is a distinctive feature of the proposed method.

When the voltage on the battery is below the second preset threshold level relay element issues a command to switch on the engine and rigidly associated with the alternator. With the control voltage at the generator output, and control the charging current of the battery is constant power charging and power generator of alternating current, and hence power of the engine.

Thus, the internal combustion engine operates in an intermittent or short-term operation under conditions of a constant preset power on his shaft.

The electric motor driving the wheel, during a pause consumes energy from the battery electric power, and during operation of the internal combustion engine electric motor consumes power from the power generator, and battery electric energy.

In the proposed method and device to optimize the internal combustion engine for varying the torque on the shaft of the electric motor at constant (predetermined) position body fuel injection internal combustion engine, providing work on the last part of the regulatory branch near the external speed characteristics. This working range due to the above system of regulation is determined by Velicina the Δ ω (1)where the specific fuel consumption is close to the minimum, and the frequency of rotation of the shaft and its power is quasi-permanent. This condition excludes the operation of the internal combustion engine in transient conditions at continuously varying the torque on the propeller, and thus further improves fuel efficiency of the engine.

Providing the specified speed and load modes of operation of internal combustion engine with variable amount of load on the shaft and the frequency of its rotation (Mwith=var ω2=var) of the driving electric motor is carried out by providing constant power values taken from the power generator. This is followed by relay element that compares the voltage at the output of the rectifier with two pre-defined levels.

Literature

1. Antonov A.S., Magidovich E.N., The novohatko I.S. Hydromechanical and Electromechanical transfer transport and traction machines / edited Asemenea, M. - L.: the motor cycle", 1965. - 351 S.

2. The raschupkin US Study the Electromechanical transmission of the tractor DET-250 mode kodomonokuni for irrigation and drainage machinery: author. Diss. ... candid. technology. Sciences. Chelyabinsk, 1968. - 21 S.

3. Sorokin, K., Karin P. Alternative? //Avtoreview. - 2005. No. 17.

4. Patent 2070649 C1 RF, MKI 6 F02D 45/00, UK 41/16. The method of stabilization of minimum fuel consumption by the engine in the morning combustion and device for its implementation / Icklesham, Eveningovie. - Publ. in BI No. 35, 1996.

1. The method of stabilization of minimum specific fuel consumption of the internal combustion engine due to the automatic control mode of the internal combustion engine based on feedback from the transmission, characterized in that the vehicle is equipped with Electromechanical transmission including the alternator, rectifier, controlled battery electrical energy, a motor with its control system, a signal equal to the difference between the desired and actual frequency of rotation of the output shaft of the engine, enhance and serves on the control input excitation current of the alternator, change its electromagnetic torque, bringing them into compliance with the torque developed internal combustion engines, at the same time measure the voltage at the output of the drive electric energy, which is compared with two preset levels, when the deviation of the measured voltage from the established levels, produce a signal for shutting off the combustion engine when the excess voltage above the predetermined upper level, or to enable the internal combustion engine when the voltage decreases below the preset lower level, enabling the internal combustion engine in an intermittent mode of operation at a constant predetermined load (capacity) in the time which I work.

2. The device stabilization of minimum specific fuel consumption of internal combustion engines, fuel injection containing a working body (TPRO), equipped with automatic control mode of the internal combustion engine with feedback with the transmission, characterized in that it further comprises an alternator, a rectifier, controlled battery electrical energy, a motor with its control system, the Converter positions TPRO in the reference signal angular frequency of rotation of the output shaft of the internal combustion engine ωasssensor frequency output voltage of the generator, the sensor voltage at the output of the rectifier, the inverter voltage generator output signal and the angular frequency of rotation of the output shaft of the internal combustion engine compares the device, with the output signal Δωequal to the difference between ωassand ωwhere ω - valid angular frequency of rotation of the output shaft of the engine, the Converter the difference between the desired and actual angular frequency of rotation of the output shaft of the engine, in an appropriate excitation current of the alternator, the system control charge current of the battery, the electric motor which drives the propulsion wheel, a control system of an electric motor including a power Converter with its control system, with the and the input signal of the driver, two-level comparator, which converts the signal at its input the command to disable the internal combustion engine or switching on the internal combustion engine and control system charging current of the battery, and the output of the comparator rotation speed of the internal combustion engine with a preset associated with transducer frequency difference of the rotation control signal voltage of the AC generator and the meter output voltage on the battery is connected with the first inputs of the two-level comparator, the second input of which is pre-set upper and lower levels, the first output of the two-level comparator connected to the input device, the switching-off of the internal combustion engine and the second output of the two-level comparator is connected with the input of the system that manages the charging of the battery and the device, running engine.



 

Same patents:

FIELD: mechanical engineering; diesel engines.

SUBSTANCE: invention relates to fuel injection control devices of diesel engines. Proposed unit injector control device contains time relay, group of NAND gates connected by inputs to control input of circuit. Outputs of NAND gates are connected to input of powerful transistor switches whose outputs are connected to outputs of electromagnet coil. Two time relays and group of NAND gates are connected by inputs to control input of circuit. Outputs of NAND gates are connected to inputs of powerful transistor switches which form bridge circuit for connecting coil of electromagnet to form forcing and demagnetizing pulses of current. One lead of coil is connected through powerful switch, diode and differentiating RC-circuit connected in parallel and ballast resistor to minus pole of storage battery. Second lead of coil is connected through powerful switch and arm of bridge to plus pole of battery connected to bridge supply diagonal to form holding pulse.

EFFECT: simplified design, increased reliability and improved design of nozzle valve.

3 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention relates to fuel injection system of diesel engines. Proposed fuel injection system of multifuel diesel engine with drainless fuel feed has nozzle with space over needle communicating with underneedle space through channel in which bypass valve is installed, and high-pressure pipe with plunger pump. System includes additionally fuel pressure drop spool in high-pressure pipeline and valve to make up high-pressure pipeline with fuel. System contains also device to control fuel pressure drop spool and make-up valve, high-pressure accumulator, springless bypass ball valve to let fuel out of space accommodating spring of nozzle needle.

EFFECT: increased power, economy and reliability of engine in operation, reduced toxicity of exhaust gases.

2 dwg

FIELD: transport engineering; internal combustion engines.

SUBSTANCE: according to proposed method of control of internal combustion engine, mainly, transport internal combustion engines, air is fed into combustion chamber by means of throttle device, mainly, throttle valve. Leaned-out fuel-air mixture is delivered into combustion chamber through fuel evaporation control system. First of all, amount of fuel delivered through fuel evaporation control system is determined and depending on amount of fuel in leaned-out fuel-air mixture and total amount of injected fuel, amount of additionally inject fuel by means of valve-type nozzle at first mode at intake stroke and at second mode, at compression stroke, is determined. At second mode, either additional amount of fuel for injecting leaned-out fuel-air mixture is injected into combustion chamber and ignited by spark plug, or if leaned-out fuel-air mixture is capable of igniting from spark of spark plug, no additional fuel is injected into combustion chamber. To implement the method, use is made of internal combustion engine with control unit including control element, mainly, flash memory.

EFFECT: provision of minimum possible consumption of fuel and minimum discharge of noncombusted fuel into ambient medium.

7 cl, 1 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

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

FIELD: mechanical engineering; engines.

SUBSTANCE: invention relates to devices for disconnection of engines in case of emergency situations and to compression brakes of engine trucks. Device for emergency shutting down of internal combustion engine and deceleration of vehicle by engine contains member for closing section of intake pipe line, closing member position setter and compressed air source. Closing member position setter is made in form of crankshaft speed limit pickup, oil pressure drop pickup, cooling liquid temperature rise pickup, and engine retarder control pushbutton. Intake pipeline section closing member is made in form of spool series-connected by pneumatic cylinder, in upper part of which calibrated hole communicating with atmosphere is made with fuel-feed valve connected with fuel-feed main line and with each of above-indicated pickups through check valve, and signal lamp and with engineering retarder control pushbutton and is connected in series with compressed air source. Pickups and engine retarder control pushbutton are connected in parallel.

EFFECT: improved reliability and efficiency of engine in operation, enlarged functional capabilities.

1 dwg

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 a device for the automatic translation engine to idle

The invention relates to automatic control of engines, in particular to the means for automatic protection of diesel engines in case of emergency situations at the time of start

The invention relates to engine, in particular to control systems for internal combustion engines

The invention relates to the field of engineering, namely, internal combustion engines, assembled from individual modules

The invention relates to an electronic circuit that can be used in the control unit economizer forced idle (BU iecu) of the vehicle, as well as in other applications that require the comparison of the frequency

FIELD: mechanical engineering; engines.

SUBSTANCE: invention relates to devices for disconnection of engines in case of emergency situations and to compression brakes of engine trucks. Device for emergency shutting down of internal combustion engine and deceleration of vehicle by engine contains member for closing section of intake pipe line, closing member position setter and compressed air source. Closing member position setter is made in form of crankshaft speed limit pickup, oil pressure drop pickup, cooling liquid temperature rise pickup, and engine retarder control pushbutton. Intake pipeline section closing member is made in form of spool series-connected by pneumatic cylinder, in upper part of which calibrated hole communicating with atmosphere is made with fuel-feed valve connected with fuel-feed main line and with each of above-indicated pickups through check valve, and signal lamp and with engineering retarder control pushbutton and is connected in series with compressed air source. Pickups and engine retarder control pushbutton are connected in parallel.

EFFECT: improved reliability and efficiency of engine in operation, enlarged functional capabilities.

1 dwg

Up!