KR101207392B1 - Test system for vehicle - Google Patents

Abstract

The present invention provides a connector for receiving a signal from a sensor installed in an engine or outputting a signal for controlling the engine, a digital input / output unit for receiving a digital signal through the connector or outputting a digital signal to the connector, and outputting from the digital input / output unit. Photocoupler for electrically blocking transmission and reception of signals by transmitting the digital signal and the digital signal output to the digital input / output unit, respectively, and to remove the noise of the digital signal output through the photo coupler and the digital signal output to the photo coupler. A TDC (Top Dead Center) signal is received from a buffer block for receiving a detection signal for the number of revolutions of each of the cranks and cams, which are input as a digital signal through the buffer block, and a rotation speed of the motor for driving the engine. To include a test controller that generates and outputs to the buffer block It's about Gene's test system.
According to the present invention, it is possible to perform a test of the engine before assembly on behalf of the ECU to enable accurate and diverse testing of the engine, it is possible to reduce the time and cost required to test the engine.

Description

Test system of the engine {TEST SYSTEM FOR VEHICLE}

The present invention relates to an engine's test system for enabling accurate and versatile engine testing by enabling pre-assembly engine testing on behalf of an ECU.

In general, the vehicle is driven by the driving of the engine, which converts thermal energy generated by burning gasoline or diesel into mechanical energy to generate power for driving the vehicle.

Such a vehicle engine includes a cylinder block for guiding the movement of a piston, a cylinder block coupled to the cylinder block, and a device for supplying fuel and exhaust gas, and a valve for controlling fuel intake and exhaust gas exhaust. Cylinder head or the like.

The conventional vehicle engine determines whether there is an abnormality of the engine using an ECU (Electronic Control Unit) for a vehicle in an assembled state. Here, ECU is an electronic control device that controls not only the engine but also the state of automatic transmission, ABS, etc. by computer.In the early stage of development, the ECU precisely controls the core functions of the engine such as ignition timing, fuel injection, idling and limit value setting. With the development of computer performance, it controls all parts of the vehicle such as automatic transmission control, drive system, braking system, steering system and so on. For example, in the case of engine control, the ECU searches the ignition timing MAP (Manifold Absolute Pressure) value and the fuel injection MAP value, which are predetermined according to the engine speed, the intake air amount, the suction pressure, the accelerator opening degree, and the like. It corrects the oxygen sensor, adjusts the opening and closing rate of the injector, determines the injection amount and ignition timing of the fuel, and improves the engine efficiency through optimum combustion based on the information collected from various sensors related to the engine. Ensure optimum engine control.

However, engine tests using conventional ECUs require actual vehicle ECUs for testing various engines due to different engines of different manufacturers, are expensive and time-consuming to test, and in the future to accurately determine engine abnormalities. It has a problem that causes.

The present invention is to solve the conventional problems as described above, by enabling the engine test before assembly on behalf of the ECU to enable accurate and various tests of the engine, and the time required to test the engine and Try to reduce costs.

According to an aspect of the present invention for achieving the above object, a system for testing an engine of a vehicle, comprising: a connector for receiving a signal from a sensor installed in the engine or outputting a signal for controlling the engine, the connector A digital input / output unit for receiving a digital signal through the digital signal or outputting the digital signal to the connector, and a digital signal output from the digital input / output unit and the digital signal output to the digital input / output unit as optical transmission and reception of the signal A photo coupler for blocking a signal; a buffer block for removing noise of a digital signal output through the photo coupler and a digital signal output to the photo coupler; and a rotation of a crank and a cam input as a digital signal through the buffer block. To detect the number and drive the engine Receiving the sensing signals for the number of revolutions of the motor for input and may include a test controller for output to the buffer block to generate (Top Dead Center) TDC signal.

The buffer block may include first and second buffers that are inverter buffers and use inverted signals.

The test controller outputs the TDC signal from the detection signal by setting the setting unit according to the type of the engine, and receives the data set by the setting unit through the transmission unit or the data about the rotation speed and the TDC. Data about the signal can be output to the outside.

An analog input / output unit for receiving an analog signal from the sensor installed in the vehicle component through the connector or outputting an analog signal for controlling the vehicle component to the connector, and converting the analog signal output from the analog input / output unit into a digital signal. And a digital analog converter (DAC) for outputting the analog signal to the test controller, and a digital analog converter (DAC) for converting the digital signal output from the test controller into an analog signal and outputting the analog signal to the connector. The signal may be input from the ADC, and the signal for performing the test on the vehicle component may be output to the DAC by a process determined according to the setting of the setting unit.

According to the test system of the engine according to the present invention, by performing the engine test before assembly on behalf of the ECU, it is possible to test a variety of accurate and accurate engine, it is possible to reduce the time and cost of testing the engine .

1 is a configuration diagram showing a test system of an engine according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the following examples may be modified in various other forms, the scope of the present invention Is not limited to the following examples.

1 is a configuration diagram showing a test system of an engine according to the present invention.

As shown in FIG. 1, the test system 100 of the engine according to the present invention includes a connector 110, a digital input / output unit 120, a photo coupler 130, a buffer block 140, and a test. The controller 150 is included.

The connector 110 receives a signal from the sensors 11, 12, 13 installed in the engine 1 or outputs a signal for controlling the engine 1, and is provided at one side of a case (not shown). This can be done with a 68-pin SCSI connector. Here, the sensors 11, 12 and 13 detect and detect the cam speed of the engine 1 and the first encoder 11 which detects the crank speed of the engine 1 and outputs it as a detection signal. A second encoder 12 outputting a signal and a third encoder 13 sensing the rotational speed of the motor 14 driving the engine 1 for testing the engine 1 and outputting the detected signal as a detection signal. can do. In addition, a filter 15 for removing noise by filtering signals output from the first to third encoders 11, 12, and 13, and a signal passed through the filter 15 as a digital signal, TTL (Transistor to It may include a conversion unit 16 for converting the signal into a transistor (Logistor Logic) signal to be input to the connector 110.

The connector 110 may receive not only the first to third encoders 11, 12, 13, but also various clock signals necessary for testing the engine 1. Herein, the first encoder 11 outputs 60 signals per pulse of the crank as pulses, and outputs 1 to 58 pulse signals and 59 and 60 low signals, respectively, so that the test controller ( This low signal allows 150 to calculate the rotation angle of the crank and the reference for the reset. On the other hand, the cam rotates once every two revolutions of the crank.

The digital input / output unit 120 receives a digital signal among the signals input through the connector 110 or outputs a digital signal to the connector 110 to be transmitted to the engine 1 side, thereby transmitting and receiving a digital signal in both directions. do.

The photo coupler 130 transmits the digital signal output from the digital input / output unit 120 and the digital signal output from the digital input / output unit 120 to light, respectively, to electrically block transmission and reception of the signal, and respectively to the digital signal to light. In order to transmit, the light emitting element and the light receiving element are combined to transmit a signal to the medium, and the light emitting portion and the light receiving portion are electrically insulated from each other to remove electrical noise. Herein, a light emitting diode may be used as the light emitting device, and a phototransistor may be used as the light receiving device.

The buffer block 140 removes noise of the digital signal output through the photo coupler 130 and the digital signal output from the photo coupler 130, and is an inverter buffer as in the present embodiment, and an inverted signal. The first and second buffers 141 and 142 may be formed. Accordingly, the signals input by the first and second buffers 141 and 142 are outputted as the standing wave by repeating the inversion twice, thereby removing the noise twice.

The test controller 150 detects the detection signal for the rotational speed of each of the crank and cam inputted as a digital signal through the buffer block 140 and the detection signal for the rotational speed of the motor 14 for driving the engine 1. It receives the input, generates a TDC (Top Dead Center) signal and outputs it to the buffer block 140. The TDC signal is generated once per two revolutions of the crank by determining the generation condition of the TDC signal according to the input value of the cam at a specific pulse of the crank. To cause the spark plug to sequentially ignite based on the TDC signal, for example an FPGA control module may be used. Accordingly, the test controller 150 counts the rotational speeds of the crank, cam, and motor 14 from the detection signals output from the first to third encoders 11, 12, and 13, and thus the crank, cam, and motor. The rotation angle of can be calculated.

The test controller 150 outputs a TDC signal from the detection signal by setting the setting unit 210 according to the type of the engine 1, and inputs data set by the setting unit 210 through the transmission unit 160. The data on the number of revolutions or the TDC signal can be output to the outside. Therefore, the test controller 150 receives data for various engines 1 from the setting unit 210 and outputs a TDC signal for igniting the spark plug at a specific angle between the crank and the cam according to the input data. In addition, by outputting data on the number of revolutions of the crank and cam and the data about the number of revolutions of the motor received by the test controller 150 to an external computer device through the display unit 220 of the computer device of the engine 1 The exact test can be displayed externally as a graph. Here, the transmission unit 160 may be made of, for example, a USB connector. In addition, the setting unit 210 may be formed of a computer device on which an engine test setting program is executed, and a monitor may be included as the display unit 220.

The test system 100 of the engine according to the present invention processes an analog signal output from the engine 1, or an analog signal output from a vehicle component except the engine 1, such as an automatic transmission, ABS or other electronic control components. An analog input / output unit 170, an analog digital converter (ADC) 180, and a digital analog converter (DAC) 190 may be included to process the test.

The analog input / output unit 170 receives an analog signal through the connector 110 from various sensors installed in the vehicle component, or outputs an analog signal for controlling the vehicle component to the connector 110. The analog signal is input, but may have a processing speed of 4μsec or more, and outputs four or more 8bit analog signals, but may have a processing speed of 2μsec or more.

In addition, the ADC 180 converts the analog signal output from the analog input / output unit 170 into a digital signal and outputs the digital signal to the test controller 150. In addition, the DAC 190 converts the digital signal output from the test controller 150 into an analog signal and outputs the analog signal to the connector 110.

As described above, the analog input / output unit 170 and the digital input / output unit 120 may change the input / output direction of the signal and may be grounded to prevent noise.

The test controller 150 receives a signal from the ADC 180 and outputs a signal to the DAC 190 to perform a test on the vehicle component by a process determined according to the setting of the setting unit 210. Here, the setting unit 210 outputs data on the vehicle parts to the test controller 150 so that the test controller 150 receives a signal from the sensors installed in the vehicle parts and provides control signals for testing to the vehicle parts. By outputting, a predetermined process is performed for each vehicle component.

According to the test system of the engine according to the present invention, it is possible to perform the test of the engine before assembly on behalf of the ECU, enabling accurate and diverse testing of the engine, and reduce the time and cost required for testing the engine Can be.

As described above, the present invention has been described with reference to the accompanying drawings, but various modifications and changes can be made without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the following claims.

1: engine 11: first encoder
12: 2nd encoder 13: 3rd encoder
14 motor 15 filter
16: converter 110: connector
120: digital input / output unit 130: photo coupler
140: buffer block 141: first buffer
142: second buffer 150: test controller
160: transmission unit 170: analog input and output unit
180: ADC 190: DAC
210: setting unit 220: display unit

Claims (4)

A system for testing the engine of a vehicle,
A connector for receiving a signal from a sensor installed in the engine or outputting a signal for controlling the engine;
A digital input / output unit for receiving a digital signal through the connector or outputting a digital signal to the connector;
A photo coupler for electrically blocking transmission and reception of signals by transmitting the digital signals output from the digital input / output unit and the digital signals output from the digital input / output unit to light, respectively;
A buffer block for removing noise of the digital signal output through the photo coupler and the digital signal output to the photo coupler; And
By receiving a detection signal for the number of revolutions of the crank and cam input as a digital signal through the buffer block and a detection signal for the number of revolutions of the motor for driving the engine, generates a TDC (Top Dead Center) signal A test controller outputting to the buffer block
Test system of the engine comprising a.
The method of claim 1, wherein the buffer block,
An engine test system comprising: first and second buffers which are inverter buffers and which use inverted signals.
The method of claim 1, wherein the test controller,
The TDC signal is output from the detection signal by setting of the setting unit according to the type of the engine, and the data set by the setting unit is received through the transmission unit, or the data about the rotation speed and the data about the TDC signal are outputted. Engine test system, characterized in that output to the outside.
The apparatus of claim 3, further comprising: an analog input / output unit configured to receive an analog signal from the sensor installed in the vehicle component through the connector or to output an analog signal for controlling the vehicle component to the connector;
An analog digital converter (ADC) for converting an analog signal output from the analog input / output unit into a digital signal and outputting the digital signal to the test controller; And
And converting a digital signal output from the test controller into an analog signal and outputting the analog signal to the connector.
The test controller receives a signal from the ADC, and outputs a signal for performing a test on the vehicle component to the DAC by a process determined according to the setting of the setting unit.

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