KR100411080B1 - Input and output signal simulator of electronic control unit for a vehicle - Google Patents

Abstract

The input / output signal simulator of the engine control apparatus for a vehicle of the present invention includes a signal adjusting unit in which an output signal is varied as a test condition is set by a user in order to simulate the input / output signal of the engine control apparatus for a vehicle, and the electric power in the engine control apparatus. A power separation unit for supplying independent power for circuit protection and test reliability, and a control signal applied from the engine controller according to a set program to determine the verification and reliability of the control logic of the engine controller. A central processor, a signal generator for simulating the output signal of the engine controller according to the output signal of the signal controller, and transmitting the signal to the central processor; and displaying the output signal of the engine controller for the user to recognize. Hybrid engine control station with signal representation for Can simulate the input and output signals of the engine controller and verify the logic of the engine controller and diagnose its reliability.

Description

I / O signal simulator of automotive engine control unit {INPUT AND OUTPUT SIGNAL SIMULATOR OF ELECTRONIC CONTROL UNIT FOR A VEHICLE}

The present invention relates to an input / output signal simulator of an engine control apparatus for a vehicle, and more particularly, the logic for developing an engine control apparatus by simulating and outputting an input / output signal of an engine for a hybrid electric vehicle similar to an actual signal. The present invention relates to an input / output signal simulator of an engine control device for an automobile for enabling verification or reproduction test of actual vehicle conditions.

In general, a hybrid electric vehicle is equipped with a heterogeneous power source engine and a battery, provided with a motor as a drive source to drive the motor by the power of the battery in the driving conditions in which a large amount of exhaust gas is generated, and to the engine in a condition that requires a large driving force By driving the motor, the exhaust gas of the vehicle can be reduced.

Accordingly, hybrid electric vehicles are being developed as environmentally friendly vehicles.

And in order to develop the controller for each function of the vehicle, it is possible to verify the control element, control logic or algorithm by making the condition corresponding to the actual driving condition by arbitrarily adjusting the input items or output devices of each controller and various control signals. Will be tested.

Thus, the motor controller, the shift controller, and the battery controller mounted in the hybrid vehicle are in charge of part-by-part functions and exchange necessary input / output signals with each other.

Therefore, a hybrid engine control device necessary for driving a motor and charging a battery is required, and a dedicated simulator for developing a control logic is required. Typically, the engine control device is implemented with an ECU (Electronic Control Unit).

However, conventional simulators for such hybrid electric vehicles have not been implemented.

The present invention was created to solve the above-mentioned conventional problems, and an object of the present invention is to simulate the output of the input and output signals of the engine for a hybrid electric vehicle (hybrid electric vehicle) similar to the actual signal to develop the engine control apparatus The present invention provides an input / output signal simulator of an engine control device for an automobile that enables logic verification for the vehicle and reproduction test of the actual vehicle state.

1 is a block diagram of an ECU simulation system to which the present invention is applied;

2 is a block diagram of an input / output signal simulator of a vehicle engine control apparatus according to an embodiment of the present invention;

FIG. 3 is a detailed block diagram of the signal adjusting unit of FIG. 2.

Explanation of symbols on the main parts of the drawings

21: signal adjusting unit 22: power disconnecting unit

23: central processing unit 24: signal generator

25: signal expression unit 26: ECU connection unit

In order to achieve the above object, the input / output signal simulator of an automotive engine control apparatus of the present invention includes: a signal adjusting unit configured to vary an output signal according to a test condition set by a user to simulate an input / output signal of an automotive engine control apparatus; A power disconnecting unit for supplying an independent power source for electric circuit protection and test reliability in the engine control unit; A central processor configured to simulate and process a control signal applied from the engine controller according to a set program to determine verification and reliability of the control logic of the engine controller; A signal generator for simulating an output signal of the engine controller according to the output signal of the signal adjusting unit and transferring the output signal to the central processing unit; It characterized in that it comprises a signal representation for displaying the output signal of the engine control device so that the user can recognize.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of an ECU simulation system to which the present invention is applied, FIG. 2 is a block diagram of an input / output signal simulator of an engine control apparatus for an automobile according to an embodiment of the present invention, and FIG. It is a block diagram.

In the present invention, the engine control apparatus may be implemented as an ECU.

Therefore, according to FIG. 1, a simulation system for performing engine simulation required for the development of an ECU for a hybrid electric vehicle includes a PC 11, an ECU 12, and a simulator 13, wherein the PC 11 includes a target vehicle model. According to the characteristics of the engine, programs for the various control functions performed by the ECU 12 and conditions, procedures, and the like necessary for performing the control functions are developed by the programmer, and the programs developed using serial communication are controlled in the ECU 12. When the simulation mode is selected, the ECU 12 outputs various control data for engine control to the simulator 13 connected through the wiring harness according to the program set by the PC 11. 13) simulates the signal applied from the ECU 12 similarly to the actual signal.

The simulator 13 may be applied when logic verification of the ECU 12 and actual load and endurance test are performed.

The simulator 13 simulates according to various signals applied from the ECU 12, and displays the simulation results so that the tester can recognize them through a display device such as a liquid crystal display (LCD) or a light emitting diode (LED). do.

Therefore, the tester performs logic detection and actual load test for each control specification while recognizing the information displayed through the display device, and according to the result, the tester is suitable for the specification and characteristics of the target engine on which the ECU 12 is mounted. By allowing a program including various control signals to be developed and mounted, it is possible to determine the reliability of the ECU 12 for the hybrid electric vehicle before the actual vehicle test.

As shown in FIG. 2, the simulator 13 includes a signal adjusting unit 21 in which an output signal is varied as a test condition is set by a user, and a power supply and a simulator 13 supplied to the ECU 12. The power supply is separated from the power supply unit 22 and the ECU 12 to protect the hardware of the ECU 12 so that independent power is used by separating the power supply to be used, and to maintain the reliability of the test of the ECU 12. The main control unit 23 for processing the control signal according to a set program and determining the verification and reliability of the control logic of the ECU 12 and the output signal of the signal adjusting unit 21 of the ECU 12. A signal generator 24 for simulating a signal and transmitting the signal to the central processing unit 23, and a signal expression unit 25 for displaying the output signal of the ECU 12 so that a user can recognize the ECU. Further includes an ECU connection 26 connected to the track for signal exchange with the The.

In addition, as shown in FIG. 3, the signal adjusting unit 21 includes a digital input terminal 21A, an analog input terminal 21B, and a frequency input terminal 21C to adjust an input signal.

The digital input terminal 21A includes an on / off signal of an air conditioner switch, an electric load 1 (ELD), a forward range (D / 2 / L), a reverse range (R), an electric load 2 (SPS), and a variable encoder (VE). ), The engine stop (EST), and the like. At this time, the input digital signal is determined by Vcc (B +) and GND (B-), respectively, indicating 1 at the applied potential (Vcc) corresponding to high level and 0 at ground (GND) corresponding to low level. Instruct.

The digital input terminal 21A receives the digital signal and performs signal transmission to the central processing unit 23.

The analog input terminal 21B processes analog signals such as the signal WTS of the cooling water temperature sensor, the signal ATS of the intake air temperature sensor, the signal MAF of the MAP sensor, and the signal O2S of the oxygen sensor.

In addition, the frequency input terminal 21C processes the signal CPS of the crank position sensor, the signal VSPD of the vehicle speed sensor, the torque signal TOR of the motor, and the like using the output of the Hall sensor.

The signals input to the digital input terminal 21A, the analog input terminal 21B and the frequency input terminal 21C are input using an encoder.

The power separating unit 22 serves to supply a reserve power, a power supply for each IC in the ECU 12, and a reset signal in two regulator integrated circuits (ICs).

In addition, the regulator IC supplies power for driving the central processing unit 23 and the peripheral IC, and adds a time delay circuit to control the power-on reset time when the power is applied. In addition, the power disconnecting unit 22 includes a processor, and when the power supply voltage is turned off, the processor does not automatically turn off the output of the regulator IC. Instead, the power separation unit 22 stores data that has been processed so far in the processor, and then commands the central processing unit 23. This adds the ability to turn off the regulator IC.

In addition, the power supply of the ECU 12 and the simulator 13 is separately manufactured for the reliability test.

The central processing unit 23 has a function of controlling the optimal operating state based on all input signals of the ECU 12 and storing the data.

The signal generator 24 includes an ADC for converting an analog signal into a digital signal and a DAC for converting a digital signal into an analog signal in order to simulate an engine signal and output it to the ECU 12. The signal generator 24 outputs a PWM signal such as TPS-PWM, TOQ-ACT, EVAP, and ENG-TOQ, and calculates the signal received from the input by a processor and transmits the signal to the outside. These PWM signals are sent to all external EMS and TMS, which can solve the grounding problem of each circuit.

In addition, all circuits have a current limiting protection circuit to protect the circuit configuration of the ECU 12 from electrical shock. The current limiting function measures an operating current by using an internal resistance, and when a current of a predetermined current or more flows in, a blocking circuit is used to block an output of an output terminal so that a high current does not flow into the ECU 12.

The signal generator 24 further includes other output stages, and includes a vortex valve and an EGR valve when dedicated to the GDI. The vortex valve controls the intake manifold of the engine to perform intake flow control, and the opening degree is adjusted according to the engine speed and the load. The hardware of the vortex valve uses a full bridge driver to increase reliability and add a failure detection function.

In addition, the EGR valve uses a stepper motor to improve reliability, and the hardware uses a unipolar driver IC and has a failure detection function.

The signal expression unit 25 displays all the signals output from the signal generator 24 using the LCD or LED.

The configuration of the simulator 13 described above and its function are summarized in Table 1 below.

function Configuration Central processing unit Calculation of various signals Microprocessor, interface circuit Signal generator Engine signal simulation and output ADC, DAC, Timer, I / F Board Signal expression unit ECU output signal display LCD, LED, Test Point Signal adjuster Output signal variable Encoder, Switch I / F Board Power disconnect ECU Signal and Simulator Power Isolation Blocking IC board Signal connection Signal line connector

By applying these simulators, the signal controller can be input to the encoder so that various signals (engine revolution, throttle position, battery charge, engine stop state, etc.) necessary during the test process can be adjusted according to the tester's will. The status can be displayed on the simulator front panel as an LED to check the normal operation of the ECU.

According to the input / output signal simulator of the engine control apparatus for automobiles of the present invention described above, the development and reliability of the engine control apparatus in the laboratory by simulating the input and output signals of the engine control apparatus when developing a hybrid engine control apparatus such as ECU There is an effect that can be diagnosed.

In addition, according to the present invention, by allowing the user to adjust the various signals required during the test process, it is possible to precisely determine whether the engine control device under test normal operation without going through the actual vehicle test to reduce the process during vehicle development There is an effect that can reduce the cost required for the actual vehicle test.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Therefore, the above description does not limit the scope of the following claims.

Claims (7)

A signal adjusting unit configured to vary an output signal as a test condition is set by a user to simulate an input / output signal of an automotive engine control apparatus; A power disconnecting unit for supplying an independent power source for electric circuit protection and test reliability in the engine control unit; A central processor configured to simulate and process a control signal applied from the engine controller according to a set program to determine verification and reliability of the control logic of the engine controller; A signal generator for simulating an output signal of the engine controller according to the output signal of the signal adjusting unit and transferring the output signal to the central processing unit; Input and output signal simulator of the engine control apparatus for a vehicle, characterized in that it comprises a signal representation for displaying so that the user can recognize the output signal of the engine control device. The method of claim 1, The signal adjusting unit, A digital input terminal for receiving digital signals such as an on / off signal of an in-vehicle air conditioner switch, an electric load 1, a forward range, a reverse range, an electric load 2, a variable encoder, and an engine stop signal and transmitting the received digital signals to the central processing unit; An analog input terminal for receiving an analog signal such as a signal of a cooling water temperature sensor in a vehicle, a signal of an intake temperature sensor, a signal of a MAP sensor, and a signal of an oxygen sensor and transmitting the received analog signal to the central processor; An input / output signal simulator of an engine control apparatus for a vehicle, comprising a frequency input stage for receiving a signal of a crank position sensor in a vehicle, a signal of a vehicle speed sensor, a torque signal of a motor, and the like, and transmitting the signal to the central processing unit. The method of claim 2, The signal adjusting unit, And an encoder for transmitting the respective signals inputted to the digital input terminal, the analog input terminal, and the frequency input terminal to the central processing unit. The method of claim 1, The power separation unit, A plurality of regulator ICs for supplying a power supply to the backup power source and the ICs in the engine control unit, respectively, and for transmitting a reset signal for resetting the respective ICs; A processor which, when the power supply voltage is turned off, does not automatically turn off the output of the regulator IC, but stores the data that has been processed in the central processing unit so that the regulator IC can be turned off by the command of the central processing unit; And a time delay circuit for supplying power for driving the central processing unit and the peripheral IC and controlling a power-on reset time when the power is applied. The method of claim 1, The signal generator, An analog-to-digital converter (ADC) for converting analog signals to digital for simulating engine signals to be mounted on a vehicle and outputting the engine signals to the engine control apparatus; A DAC for converting a digital signal into an analog; An input / output signal simulator of an engine control apparatus for a vehicle, characterized in that it comprises a processor for generating a signal for calculating the signal to be transmitted to the external EMS or TMS by receiving the input signal. The method of claim 5, The signal generator, A vortex valve implemented by a full bridge driver IC to control the intake manifold of the engine to perform intake flow control; An input / output signal simulator for an engine control apparatus for an automobile, characterized by further comprising an EGR valve implemented by a unipolar driver IC to control a stepper motor to perform exhaust gas recirculation control. The method according to claim 1 or 5, The signal generator, Measures the operating current using the internal resistance, and if the current exceeds the set current value, a current limiting protection circuit is provided to block the output of the output stage by using a blocking circuit so that the overcurrent does not flow into the engine controller. I / O signal simulator of automotive engine controller, including.