Method and device control arithmetic logic module in the vehicle

 

The invention relates to a method and device control arithmetic logic module (ALM) in the vehicle. The technical result consists in the possibility of establishing a monitoring system ALM vehicle that despite the increasing number of different functions would be high enough quality control. According to the invention ALM, provided in the vehicle, has software modules, with which the impact on performance of the vehicle. While specified ALM using these software modules generates on the basis of at least one input variable, at least one output value to control at least one function of the vehicle. To monitor the correct operation of ALM is selected, at least one software module or at least one part of it. This, at least one selected module, accordingly, the at least one selected part or the copy is performed in ALM using the test data, and the obtained result is compared with the specified result to detect errors or deviations. 2 N. and 8 C.p. f-crystals, 3 ill.

From the application DE-A 4438714 known method and a control device provided in the vehicle ALM, software structure which has at least three levels. The first level includes a program that performs a control function, such as controlling the power of the power unit. The second level includes programs designed to monitor the correct implementation of the programmes of the first level. For this purpose considered in this application example, perform system power control power unit valid value adjustable working parameter is compared with the measured or obtained by computing the actual value of this parameter. The third level comprises program, or part thereof, designed to monitor the correct implementation of regulatory programs related to the second level. While checking the correctness of the implementation of the programmes of the second level is through communication mode request-response with a security module (control module), which controls the correctness of the implementation of the programmes of the second level on the basis of the results obtained during the exchange of data in the specified mode request-response (control the correctness of the implementation is lonene in response to this rejection is received, the appropriate response, in the event of a control power unit are in the off supply of the working fluid or restriction other operating parameters.

To improve the efficiency of monitoring the correct implementation of the programmes of the second level according to DE-A 19609242 in addition to checking the correctness of program execution or in lieu of such verification is provided for testing the correctness of the command processing, consisting in the execution of the selected programmes or their parts using the specified test data and verifying received or obtained results of calculations with accuracy to the bit in the module control to detect errors or deviations.

The essential point in these known solutions is that the first and second level, as well as control the correct execution of programs and testing the correctness of the processing commands are executed in one ALM. In this case the controlling programs of the second level must be processed input signals, which is excessive in relation to the input signals processed by the programs of the first level. In the doubles the number of sensors, thus avoiding the use of additional sensors with the look at a small number of matched input signals. In addition, as more of the various functions, primarily increasing functions, which are critical in relation to the capacity of the power unit, for example in control systems for engines with direct injection of gasoline, as such control is getting worse. An example of a function that can adversely affect the quality of control is self-learning function limiting the stroke of the accelerator pedal to the provisions on the basis of signals from the position sensor accelerator pedal. If you are performing this function of self is changed, for example, the steady-state error or the offset of the sensor signal accelerator pedal position, then this change should be considered when control by taking into account the maximum tolerances of the final provisions limiting the stroke of the pedal. The presence of such a relatively large field of tolerance can lead to lower quality control.

Based on the foregoing, the present invention was based on the task to develop such a control system provided in the vehicle ALM, which despite the increasing number of different functions would be high enough quality control.

Shown is e, having software modules, with which the effects on the operating characteristics of the vehicle, with the specified ALM using these software modules generates on the basis of at least one input variable at least one output value to control at least one function of the vehicle. According to the invention, for monitoring the proper operation ALM choose at least one of the software modules or at least part of it in ALM is performed by using test data specified at least one selected program module, respectively indicated at least one part or a copy, and the calculation result obtained using the test data is compared with the specified result to detect errors or deviations.

The check trigger module control.

It is advisable, along with the specified test should include the control of correctness of execution of the specified at least one selected program module, which consists in the exchange of data with the control module in the mode of the request-response and triggered by this control module.

The result, we shall ravnivat in the quality control module with the corresponding given result and in case of inadmissible deviations using the control module to take retaliatory measures in response to such deviations.

In accordance with the invention ALM is designed to control the power unit of the vehicle, and the specified at least one selected program module is essential to ensure the operational reliability and safety of the vehicle, preferably, is crucial in relation given by the engine power, for example, is asked to determine the impact driver, to control the rotational speed at idle for coordination of the moment or for the regulation of the throttle position.

The specified at least one selected program module, respectively indicated at least one selected part preferably be attributed as the source program to the first level ALM (level 1), and as a copy either in the original form to conduct such checks, be attributed to the second level ALM (level 1').

Preferably also specified at least one selected program module, respectively indicated at least one selected part of it to use for validation in the form of a source program.

Along with testing the correctness of the command processing, which consists in carrying out paragraph shall control the correctness of the program execution, it is advisable to verify at least important to ensure the operating reliability and safety of the vehicle memory cells ALM.

It must be emphasized that ALM is designed to control the automatic transmission, the control system of engine power or braking system, electrically operated, preferably the brake system with the application of a drive force to the brake pads from the electric motor.

The objective of the invention is also solved with the help of its proposed device control arithmetic logic module (ALM) in the vehicle, including ALM, with software modules, with which the effects on the operating characteristics of the vehicle, with the specified ALM using these software modules generates on the basis of at least one input variable at least one output value to control at least one function of the vehicle. According to the invention, it is characterized by the presence of at least one of the software modules or at least part thereof, selected for control over the proper operation ALM in ALM using the testing data is specified at least one selected program module, respectively indicated at least one is acceptable outcome for the detection of errors or deviations.

Proposed in the invention control system ALM in the vehicle provides satisfactory control operation of the ALM even if you increase the amount of its functions and various quantities used in various vehicle sensors.

A special advantage lies in the possibility to refuse additional level of control without deviating from the existing standards of operational reliability and safety of the vehicle.

In this regard, a particular advantage is that simplified the development process of the system control ALM, since no one new feature that is important for ensuring the operational reliability and safety, does not require a corresponding new control functions. In the avoided costs associated with the development of such regulatory functions.

Special offer advantages in the invention of the approach are the use of this approach in the management system of the power unit, which provides a large number of functions, which are critical in relation to the given engine power.

Another advantage of the proposed invention is that the matching CFT impact on the quality of the control.

To test the validity of the command processing set computation steps is most preferable to select from functional programs, as a result it is possible to reduce the amount of calculations without departing from existing standards of operational reliability and safety of the vehicle.

Along with the described approach is most preferable to additionally provide known from the prior art control implemented in ALM on the second level.

Other advantages of the invention are discussed below in the following description of the different variants of its realization, respectively dependent claims.

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

in Fig.1 is a General diagram of the control unit with ALM, the control in the vehicle at least one working parameter, preferably the regulatory power of the power unit;

in Fig.2 is a diagram illustrating as an example the process of monitoring ALM;

in Fig.3 is a diagram illustrating two possible validation process commands.

In Fig.1 shows ELEH the control module 11, input circuit 14 and an output circuit 16. The memory modules are part of ALM 12 or interact with him. To exchange data, these components are connected to each other by a system of 18 data. In the input circuit 14 receives signals that characterize the measured operating parameters of the power unit, transmission and/or vehicle, or on the basis of which you can define such parameters. These signals are measured by a measuring device 20-24 and input lines 26 to 30 are received in the input circuit 14. With the output circuit 16 in turn are given control signals, which control elements regulate at least one working parameter of the power unit, transmission and/or vehicle. Appropriate control signals are sent to actuators 38-42 lines 32-36.

ALM 12 depending on the input signals, which is determined on the basis of operating parameters and/or internal variables, generates its programs values issued by the control actions for regulating actuators in accordance with a given control strategy. In preferred variations which loke control in a known manner determined position sagastume driver of the governing body, then the received information is processed and then calculates the setpoint torque of the shaft of the power unit. This setpoint torque are taken into account then received in the input circuit 14 set values from other management systems, such as traction control and/or management system gearbox and so on, and also formed an internal setpoints (restrictions and so on). In a preferred embodiment of the internal combustion engine (ice) is specified, the value is converted in a subsequent specified value throttle position, in which the latter is set then the control loop of its provisions. In addition, depending on the equipment of internal combustion engine provided additional influence given them power functions, such as managing the turbocharger, the control recirculation of exhaust gases, the control of rotational speed at idle, etc. in Addition, in internal combustion engines with direct injection of gasoline given them power and influence not only the regulation of the air supply, but also to regulate the quantity of fuel to be injected, the regulation of the composition of the combustible smenoi valve, the management charge distribution, and therefore, for this engine, along with the above it is necessary to provide a number of other programs that affect given, respectively, developed engine power and thus the operational reliability of the vehicle.

In another embodiment, the control block 10 can be used to control an automatic transmission or brakes, such as brake system with application of a drive force to the brake pads from the motor. For such systems have programs that provide operational reliability and safety of the vehicle, such as brake control system for this purpose is provided by the formation of the predetermined braking force, an adjustable preset braking force to individual wheel brake mechanisms, the formation set by the driver braking effect on the basis of signals characterizing the degree of pressing on the brake pedal, etc., Appropriate important to ensure the operating reliability and safety of the vehicle functions are provided to control transmission.

In one such error definitions or descriptions and software errors, encountered in the design of appropriate control software, and the second category includes hardware errors in ALM, which may occur during operation of the control unit. Considered at the beginning of the description of the concept of control cover both these categories of errors. The following concept of control is based on the separation of the analysis of both these categories of errors in ALM control are only for hardware errors. This approach allows us to test the proper operation commands relating to the important for ensuring the operational reliability and safety functions, if necessary, in addition to testing the correctness of program execution. This does away with the need belonging to the 2nd and 3rd levels of the programs, since the control is performed by means important to ensure the operating reliability and safety of the vehicle functions available on the first level (level 1'). Along with testing the correctness of processing commands and, if necessary, testing the correctness of the program execution is provided by the tests of memory, allowing you to monitor the serviceability of the memory ALM.

Na by using appropriate measures and to exclude under development, for example, by developing critical to ensuring safety and security features and components of several developers with mutual control of the results of their work. In addition, errors of this type detect by comparing obtained in the course of development results with the simulation model and thus check the software on the error.

As a result, for control in ALM remain only hardware errors, due to which the computing device is enough to check only important to ensure the operating reliability and safety functions, and the control system power unit - only the control circuit of various influencing given engine power functions and thus only modules that affect a given engine power. Check these functions, respectively, of software modules is performed by testing the correctness of processing commands and, if necessary, by checking the correctness of program execution. When testing the correctness of the command processing module 11 controls for the selected modules are selected reference or test data. Implemented by these modules control the received data are mapped with an accuracy of up to bits with the corresponding test data. If the results obtained when testing the correctness of the processing of the commands do not match with the expected parameters, in response to this rejection response, which consists, for example, in a corresponding actuation of the control module, is made as a separate unit. Memory (memory with random access (NVR), persistent memory (ROM)) of the control unit and/or ALM tested independently from the control of the correct functions.

Running the above method, the control is carried out by selecting some important to ensure the operating reliability and safety of software modules and/or provided by these software modules of computation steps and their bindings in the form of copies or by temporarily switching to tier 1'. In one embodiment, this copy is stored in the memory module. To reduce the load on the computing device, it is preferable to copy, respectively, to use when testing the correctness of the command processing only part of the software modules functional level, especially in those cases when the individual is important to ensure operational only filled with the individual steps of the program, such as the operations of addition, subtraction, and so on

Test calculations for testing the correctness of the command processing should be carried out only slightly less, preferably, however, the same frequency as functional calculations. Fast reaction to rejection is ensured by the fact that the error is detected when testing the correctness of the command processing is equivalent to the existence of a failure in the entire system.

Additionally important to ensure the operating reliability and safety functions of the 1st level controlled due to the ongoing well-known way of checking the correctness of program execution. During such control of correctness of program execution, the control module sends selected using a random number generator requests that the response is processed in the selected software modules or steps of the program of the 1st level, and then received a summary result is transmitted to the control module. Then this result is compared in the control module with the corresponding specific request standard or reference response message. Termination of the processing of such requests is interpreted as a failure.

In preferred options and vehicle safety are the modules of the signal processing, characterizing the position of the accelerator pedal, the control modules of the regulator throttle position, the modules for testing analog-to-digital Converter modules coordinate of the given points, modules, speed control at idle, the modules of the control throttle position, etc.

Along with testing the correctness of the processing of the command and control of the correctness of program execution in the preferred embodiment, is the Express control of the memory modules, at least in regard to important to ensure the operating reliability and safety of software modules. The memory test is performed with small time intervals. As an example, the corresponding control memory can be described as a double save in the NVR information with the addition of either an appropriate test of the important cells of the memory module. A similar approach can be used to check the ROM unit 10 of the control.

Executing the above method of control ensures correct operation of the ALM and the effective recognition hardware errors in ALM. Even more to improve the quality control allows additional control rights is a major control function provides a generally reliable and quality control ALM.

Below, the preferred embodiment of the invention illustrated in the example schematically shown in Fig.2 the control system of the engine.

In Fig.2 schematically depicted ALM 12, and a separate control module 11. Important to ensure operational reliability and security functions, respectively software modules conditionally designated positions 110, 112, 114-118. In ALM system 18 data received values on the basis of which in the shown software modules are defined size, which are software modules that are important for ensuring the operational reliability and safety of the vehicle, i.e., defining the given engine power. In addition, ALM generates system 18 data actuators control signals, the magnitude of which is determined by at least one of the software modules 110-118. Not shown is also necessary in this case, the intermediate steps and intermediate calculations performed by software modules shown in the formation of control signals.

In a preferred embodiment of the control system of internal combustion engine selected software modules 110-118 are programmierer and forms set by the driver impact module 112 coordinates the torque module 114 adjusts the rotational speed at idle, and module 118 adjusts the position of the throttle. Recent issues then on the basis of the received other modules of the intermediate results of the control signal that defines a given engine power. Along with this there are other important to ensure the operating reliability and safety of the vehicle software modules, which, however, for simplicity not shown in Fig.2, for example, the modules of the test analog-to-digital Converter, control knob throttle, signal processing, characterizing the position of the throttle, and so on

In Fig.2 illustrates further the above-described control method ALM 12 and its interaction with the control module 11. The drawing shows two available in ALM 12 software level, namely level 1, which includes programs (e.g 110-118), carrying out the control function, and level 1', which includes programs 110-118, their parts or copies of the underlying implementation of control functions. ALM 12 is connected with the module 11 of the control system 18 of the data that is shown in Fig.2 lines 18a and 18b. the em what is conventionally indicated by the line 18C, control system, switching it to emergency mode or limiting its control functions.

Shown in the drawing program 110-118 have an important impact on the operating characteristics of the vehicle from the point of view of its operational reliability and safety, as they impact on delivered power unit power independently set by the driver impacts. Presents program being functional programs, refer to the level 1 and are practiced at this level in quality control programs. With the help of these programs is known from the prior art control the correct execution of a program initiated by the module 11 control line 18a by means of the communication mode request-response. For this reason, the program 110 and 118 are also part of the regulatory tier 1' ALM 12. Consolidated response message, in whose formation in response to received from module 11 of the control request includes all of the selected software modules, through the logic element 120, which is the result obtained when the correctness of program execution, can be logically combined with the result obtained when testily 11 control then checks the correctness of the received result by comparison with a set value and in case of an inadmissible deviation triggers a response in response to such deviations (on line 18C).

Testing the correctness of the command processing is performed, as is known from the beginning of the description of the prior art, based on the specified test data in conventionally denoted by the block 122. In memory ALM 12 while it is preferable to store multiple sets of test data that are selected by the control module 11 according to the corresponding command. The correct command processing is tested on selected programs, which have an important influence on the operational reliability and safety of motor vehicles, particularly decisive in relation to the given engine power. In this example, such programmes are 110-118. Depending on the specific variant testing the correctness of the command processing unit 122 can be exposed to all programs, when carrying out such testing or the entire program is run entirely using test data or, as shown in Fig.2, run only the selected part or steps 1100-1180 program. Of each program are selected, for example, certain steps, in particular the operations of addition, subtraction or multiplication. The selected steps or parts of the program kop is overki correct processing commands are executed (or a copy either in the original form) using the testing data. Obtained with this test result is passed through the logic element 120 along the line 18b in the control module 11. Along with testing the correctness of the command processing and the control of correctness of program execution is described above, the memory test.

Instead of a copy of the original program or its parts in another embodiment, for the test calculations using the original program itself. Required when this switch is part of level 1'.

In Fig.3, for example, the program 110 illustrated two possible variants of the proposed method. According Fig.3A, copied the entire program 110 or its individual steps, while testing the correctness of the command processing is carried out on the basis of a copy 110b. The very same source program 110A, providing the performance of business functions, and it is not affected.

In the second variant, shown in Fig.3b, there is only one instance of the program 110, which is the original. Upon the occurrence of conditions (preferably at the preset time), on the basis of which begins testing for proper operation teams, pereklyuchatelei using real data (18), and testing data (18a), and then the obtained result is given for verification module 11 control (18b). Along with the run of the entire program 110 for testing the correctness of processing commands as the basis for such testing are selected portion, respectively, the steps of the original program 110.

Claims

1. The method of control arithmetic logic module (ALM) (12) in a vehicle having software modules (110-118), with which the effects on the operating characteristics of the vehicle, with the specified ALM using these software modules generates on the basis of at least one input variable at least one output value to control at least one function of the vehicle, characterized in that for controlling the proper operation ALM (12) choose at least one of the software modules or at least part of it in ALM (12) is carried out using test data specified at least one selected program module, respectively indicated at least one part or a copy, and the calculation result obtained using proveris fact, the check trigger module control.

3. The method according to p. 1 or 2, characterized in that, along with the specified test provides a check of the correctness of execution of the specified at least one selected program module, which consists in the exchange of data with the control module in the mode of the request-response and triggered by this control module.

4. The method according to any of paragraphs.1-3, characterized in that the result obtained when carrying out such checks and/or control the correct execution of the program, compare in the quality control module with the corresponding given result and in case of inadmissible deviations using the control module take retaliatory measures in response to such deviations.

5. The method according to any of paragraphs.1-4, characterized in that the ALM is designed to control the power unit of the vehicle, and the specified at least one selected program module is essential to ensure the operational reliability and safety of the vehicle, preferably, is crucial in relation given by the engine power, for example, is asked to determine the impact driver, for adjusting the frequency of rotation when holaaa of PP.1-5, characterized in that the at least one selected program module, respectively indicated at least one selected part of it is attributed as the source program to the first level ALM (level 1), and as a copy either in the original form to conduct such checks, refer to the second level ALM (level 1).

7. The method according to any of paragraphs.1-6, characterized in that the at least one selected program module, respectively indicated at least one selected portion thereof, used for validation in the form of a source program.

8. The method according to any of paragraphs.1-7, characterized in that in addition to testing the correctness of the command processing, consisting in conducting the verification calculations using the original or copies of the original program, and/or in conjunction with the control of correctness of program execution to validate at least important to ensure the operating reliability and safety of the vehicle memory cells ALM (12).

9. The method according to any of paragraphs.1-8, characterized in that the ALM is designed to control the automatic transmission, the control system of engine power the underwater force to the brake pads from the electric motor.

10. The control unit arithmetic logic module (ALM) (12) in the vehicle, including ALM (12) having software modules (110-118), with which the effects on the operating characteristics of the vehicle, with the specified ALM using these software modules generates on the basis of at least one input variable at least one output value to control at least one function of the vehicle, characterized by the presence of at least one of the software modules or at least part thereof, selected for control over the proper operation ALM (12)in ALM (12) using the testing data is specified at least one selected program module, respectively indicated at least one part or a copy, and the calculation result obtained using the test data is compared with the specified result to detect errors or deviations.



 

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