KR101499092B1 - An diagnosis device for an automobile - Google Patents

Abstract

The present invention relates to a diagnostic device for an automobile and, more specifically, to a diagnostic device capable of more precisely measuring a sensor signal, not provided from an ECU or demanding higher speed, as well as a signal of the ECU. In addition, the diagnostic device can accurately analyze the cause of a poor state of components by simultaneously receiving a low-speed signal from a communication unit for low-speed signal collection with high correlation and a high-speed signal from a waveform measurement unit for high-speed signal collection and indicating, comparing, and analyzing the change of the signals over time. To this end, the diagnostic device for an automobile comprises: a communication unit for low-speed signal collection which collects diagnostic codes or various signals from the ECU (110) inside a vehicle, transmits a control signal to the ECU (110), and controls core components; a waveform measurement unit for high-speed signal collection which directly transmits the control signal to the components inside the vehicle; a user interface unit which is realized as a keypad or a touch screen, wherein a car model, a production year, and a menu selection signal are entered by a user; and a control unit generating diagnostic information for the vehicle by comparing the diagnostic codes entered from the communication unit for low-speed signal collection (210) with the standard codes stored in a database (260).

Description

An diagnostic device for an automobile

The present invention relates to a vehicle diagnostic apparatus, and more particularly, to a vehicle diagnostic apparatus capable of more precisely measuring not only an ECU signal but also a sensor signal which is not provided by an ECU or requires a high speed, The present invention relates to a vehicle diagnostic apparatus capable of precisely analyzing the cause of a failure of a component by simultaneously receiving a low-speed signal and a high-speed signal from a waveform measuring section for collecting high-speed signals to display, will be.

2. Description of the Related Art [0002] In recent years, with the rapid development of electronic control technology, various devices that have been operated by a mechanical method in automobiles are driven by an electric method for convenience of the driver and safety of operation, It is becoming more advanced.

Recently, a telematics device is installed in a vehicle to provide a mobile office service using a wireless Internet, an e-mail service, etc. in addition to a vehicle location information service, a vehicle theft and accident detection, a remote vehicle diagnosis, an emergency rescue, have. Telematics is a combination of telecommunication and information science. It means a combination of automobile, computer and telecommunication technologies. It is based on mobile communication and internet technology. Security services, productivity improvement services through providing an office environment, finance, reservations, purchase of goods, and other personalized services. Telematics' representative services include navigation, real-time traffic information, emergency services and various entertainment related fields.

As vehicles become more sophisticated, the types of failures of automobiles are diversified. Fault checking technology and fault diagnosis technology are also improving.

Most of the automobiles currently on the market have an engine control module (hereinafter referred to as "ECM") that receives detection signals from various sensors and controls the operation of the engine based on the signals, an automatic transmission control (TCU), an anti-lock break system (ABS) for controlling the braking operation, an electronic control suspension system for controlling the up-and-down vibration and attitude of the vehicle body, ECS) and many other electronic control units ("ECUs").

Each of the plurality of electronic control units (ECUs) has a self-diagnosis function, and receives detection signals from various sensors attached to the vehicle, detects the functional states of the respective devices, And the diagnostic code stored in the electronic control unit is output to the outside by various methods.

Currently, the car diagnostics device is connected to the OBDII 16-pin DLC (Data Link Connector) to display ECU and related vehicle information on PDA type equipment. The functions provided include self diagnosis, sensor output, running test, actuator test, sensor output & simulation, various learning value erasing, A / T & TCS learning correction, and so on.

However, since the diagnostic device is not capable of diagnosing the sensor not provided by the ECU and is dependent on the A / D sampling ratio of the ECU, it is difficult to precisely measure a sensor signal requiring a high speed. In order to accurately analyze the cause of the defective state, there has been a disadvantage that the control signal is directly transmitted to the vehicle to induce the output of the signal to be measured, or a plurality of highly correlated signals are simultaneously received and displayed on the same screen.

Korean Patent Publication No. 2009-0105410 (2009.10.07.) Korean Patent Laid-Open Publication No. 2010-0065734 (Jun. 17, 2010)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a sensor system which can measure not only ECU signals but also sensor signals which are not provided by an ECU or require a high speed, By receiving a low-speed signal from the signal collecting communication unit and a high-speed signal from the waveform measuring unit for high-speed signal collecting simultaneously, it is possible to display, compare and analyze the change of the signal over time on the same screen, The present invention provides a diagnostic apparatus capable of analyzing a subject.

It is another object of the present invention to provide a diagnostic apparatus that can send and receive a control signal directly to a desired part of an automobile to induce a measurement signal in a desired part state and to measure an output.

In order to accomplish the object of the present invention, a vehicle diagnostic apparatus according to the present invention is connected to an ECU 110 in a vehicle, collects diagnostic codes and various signals from the ECU 110, and transmits a control signal to the ECU 110 A low speed signal collecting communication unit for controlling the core parts, an output value of a part which is required to have a high speed or a part which is not provided by the ECU 110, and directly transmits a control signal to the in- A user interface unit which is implemented by a keypad or a touch screen and receives a vehicle type and a model from a user or receives a menu selection signal; Vehicle diagnostic information is generated by comparing the code with the reference code stored in the database 260, and when the diagnostic code is generated by the self-diagnosis function from the ECU 110, And a signal that can be received by the low speed signal collecting communication unit 210 and a signal that can be directly received by the high speed signal collecting waveform measuring unit 220. The controller 240 Vehicle component signal received from the low-speed signal collecting communication unit 210 and the high-speed signal collecting waveform measuring unit 220 to the low-speed communication area and the high-speed communication area, respectively, And a database unit for storing a self-diagnosis code input from the ECU 110, a reference code for analyzing the self-diagnosis code, and a conversion table.

As described above, the diagnostic apparatus according to the present invention comprises a communication section for low-speed signal collection for transmitting and receiving data to and from the ECU, and a waveform measuring section for high-speed signal collection for directly transmitting and receiving data, Speed signal from a communication unit for low-speed signal collection and a high-speed signal from a waveform measuring unit for high-speed signal acquisition at the same time, It is possible to accurately analyze the cause of the failure of the component.

In addition, the present invention has an effect that a control signal is directly transmitted and controlled to a desired component in a low-speed signal collecting communication unit or a high-speed signal collecting waveform measuring unit, thereby deriving a measurement signal in a desired component state and measuring an output .

1 is a diagram showing a configuration of a diagnostic apparatus according to the present invention.
2 is a view illustrating a screen of a display unit of the diagnostic apparatus according to an embodiment of the present invention.
FIG. 3 is another embodiment showing a screen of the display unit of the diagnostic apparatus 200 according to the present invention.

The present invention will now be described in detail with reference to the accompanying drawings.

1 is a diagram showing a configuration of a diagnostic apparatus according to the present invention.

1, the diagnostic apparatus of the present invention includes a low speed signal collecting communication unit 210, a high speed signal collecting waveform measuring unit 220, a user interface unit 230, a control unit 240, a display unit 250, 260).

The low-speed signal collecting communication unit 210 receives an output value of components such as an oxygen sensor, a pressure sensor, and an engine rotational speed self-diagnosed by the ECU 110 at a speed of 10 ms to 100 ms, 211 and a low-speed signal collecting communication transmitting and receiving unit 212.

The low-speed signal collecting communication interface 211 communicates with the ECU 110 in the vehicle, and is generally referred to as a connector or an adapter. When the ECU 110 is OBD-II, the low-speed signal collecting communication interface unit 211 supports the ISO, KWP, PWM, CAN, and VWP communication protocols and conforms to the OBD-II connector standard (SAEJ-1962) do. Vehicle ECU 110 such as an engine control unit (ECM), a shift control unit (TCU), a braking control unit (ABS) and a suspension control unit (ECS) An ECU 110 plays a role of storing or outputting the state of the vehicle detected during operation as part of the self-diagnosis information or the vehicle driving information in addition to the vehicle control function. The communication protocol according to the OBD standard described above may be changed according to the international protocol, and the scope of the present invention is not limited thereto. That is, it should be considered that the constitution of the communication interface unit 211 for low-speed signal collection to correspond to each international protocol is within the scope of the present invention.

The low-speed signal collecting communication transmitting and receiving unit 212 is a device for collecting diagnostic codes and various signals from the ECU 110 in the vehicle. The information provided by the ECU 110 is used for diagnosis of the engine trouble and corresponding code, It receives information signals related to the core parts of the vehicle such as injection amount, fuel consumption for one second, cooling water temperature, intake air temperature, mission oil temperature, battery voltage.

When receiving the self diagnosis command from the driver, the communication transmitting / receiving unit 212 for low speed signal collection generates a message including the self diagnosis command and transmits it to the in-vehicle ECU 212 through the communication interface unit 211 for low speed signal collection Lt; / RTI > Accordingly, the in-vehicle ECU 110 receives a message including the self diagnosis command from the diagnostic apparatus 200 of the present invention. When receiving the component control command from the driver, the low-speed signal collecting communication transmitting / receiving unit 212 transmits a control signal to the ECU 110 in the vehicle to control the core component. For example, in order to test the relief for each engine cylinder, the low-speed signal collecting communication transmitting / receiving unit 212 sends an injector injection stop signal to the in-vehicle injector control device via the ECU to stop the injector injection. In this state, when the high-speed signal collecting waveform measuring unit 220 measures the output value of the crank angular velocity sensor and measures the speed change to perform the power balance test for each cylinder of the engine, The inconvenience of measuring the output can be solved.

The high-speed signal collecting waveform measuring unit 220 measures a part requiring a high speed by directly connecting to the in-vehicle component without passing through the ECU 110, or measures the output value of a component not provided by the ECU 110 A waveform measurement interface unit 221 for high-speed signal collection, and a waveform measurement transceiver unit 222 for high-speed signal collection.

The waveform measurement interface unit 221 for high-speed signal collection is constituted by connection terminals such as a probe directly connected to a component terminal 120 such as a signal line or a connector of an in-vehicle component.

The high-speed signal collecting waveform measuring transceiver 222 receives a component voltage value required for high-speed communication such as an ignition waveform, a crank angle sensor, a speed sensor, and an ignition coil as an analog waveform signal.

When receiving the component control command from the driver, the high-speed signal collecting waveform measurement transmitting / receiving unit 222 directly transmits a control signal to the in-vehicle component through the waveform measurement interface unit 221 for high-speed signal collection, The output value at the time when the appropriate control state is obtained is measured. For example, the high-speed signal collecting waveform measuring transceiver 222 directly transmits an analog output signal to the solenoid terminal to drive the solenoid valve of the automobile and the like through the low-speed signal collecting communication unit 210, When the pressure is received by the pressure sensor, it is possible to diagnose the failure of the correct solenoid valve from the received pressure sensor output value.

The user interface unit 230 may be implemented as a keypad including a plurality of key buttons, or may be implemented as a touch screen for the convenience of the user. The user interface unit receives a vehicle type and a model year from a user, and receives a menu selection signal.

The control unit 240 compares the diagnostic code received from the low speed signal collecting communication unit 210 with the reference code stored in the database 260 to generate vehicle diagnostic information, . In addition, the control unit 240 automatically designates a related component terminal or signal line when a diagnostic code is generated by the self-diagnosis function from the ECU 110, and a signal that can be read by the communication unit 210 for low- The low-speed signal collecting communication unit 210 does not support it and automatically guides the signal to be directly input by the high-speed signal collecting waveform measuring unit 220. The control unit 240 then outputs an abnormality signal of the mounted or installed components received from the low-speed signal collecting communication unit 210 and the high-speed signal collecting waveform measuring unit 220 to the same So that it is possible to accurately grasp the status information (that is, information on the presence or absence of an abnormality of the component) and analyze the cause of the component. The control unit 240 measures the output value of the component through the high-speed signal collecting waveform measuring unit 220 while transmitting the control signal from the low-speed signal collecting communication unit 210 to the ECU 110, Speed signal collecting communication unit 210 while measuring the output value of the component by transmitting the control signal directly to the in-vehicle component from the waveform measuring unit 220 and testing the condition of the vehicle.

The display unit 250 outputs the vehicle diagnostic information processed by the control unit 240 to the screen and displays the diagnostic information on the vehicle interior received from the low speed signal collection communication unit 210 and the high speed signal collection waveform measurement unit 220. [ And displays the presence / absence signal of mounted or installed parts in the low-speed communication area and the high-speed communication area, respectively. The display unit 250 preferably uses an LCD (Liquid Crystal Display) having a small power consumption and a wide viewing angle. Since a driver may operate the keypad unit 50 during operation, an accident may occur. So that the driver can directly click on the screen of the LCD to select it.

The database unit stores a self diagnosis code input from the ECU 110, a reference code for analyzing the same, and a conversion table. The conversion table includes a definition of the self diagnosis code, diagnosis contents, .

2 is a view illustrating a screen of the display unit 250 of the diagnostic apparatus 200 according to an embodiment of the present invention.

The output values of the vehicle speed sensor and the engine speed sensor received from the low speed signal collecting communication unit 210 are displayed in the low speed communication area 252 of the display unit 250, The waveform is displayed in the high-speed communication area 251. Therefore, if the RPM of the engine speed is increased, the ignition waveform is reduced. If the RPM is slowed, the ignition waveform is increased. Thus, the ignition engine can be checked for malfunction while comparing the changes of the ignition waveform according to the change in the engine speed.

FIG. 3 is another embodiment showing a screen of the display unit 250 of the diagnostic apparatus 200 according to the present invention.

When a diagnostic code is generated from the ECU 110 by a self-diagnosis function, the control unit 240 automatically designates a related component terminal or signal line and outputs a signal readable by the vehicle model to the low-speed signal collecting communication unit 210, The signal for the high-speed signal collecting waveform measurement unit 220 is automatically input to the display unit 250 because the signal for the high-speed signal acquisition unit 210 is not supported. The display unit 250 guides the signal lines of the camshaft position sensor and the crankshaft position sensor, which are required to be connected at a high speed signal collecting waveform measuring unit 220 at a high speed.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: vehicle 110: ECU
120: Component terminal 200: Diagnostic device
210: Low speed signal collecting communication unit 220: Waveform measuring unit for high speed signal collecting
230: user interface unit 240: control unit
250: display unit 260: database

Claims (6)

The ECU 110 is connected to the ECU 110 to receive data on the diagnostic code and various signal values from the ECU 110 in a communication manner and transmits a control signal to the ECU 110 for low speed signal collection A communication unit;
A high-speed signal collecting waveform measuring unit for directly connecting output signals of parts whose signal values change rapidly or not provided by the ECU 110 directly to signal lines and for transmitting control signals directly to parts in the vehicle;
A user interface unit which is implemented by a keypad or a touch screen and receives a vehicle type and a model from a user or receives a menu selection signal;
The vehicle diagnostic information is generated by comparing the diagnostic code received from the low speed signal collecting communication unit 210 with the reference code stored in the database 260 and the vehicle diagnostic information is generated from the ECU 110 by the self diagnosis function A controller that guides a signal of a component terminal to be received by the low-speed signal collecting communication unit 210 and a signal that can be directly received by the high-speed signal collecting waveform measuring unit 220;
Vehicle component signals received from the low-speed signal collecting communication unit 210 and the high-speed signal collecting waveform measuring unit 220 are transmitted to the low-speed communication area 210, And a high-speed communication area;
A database unit for storing a self diagnosis code input from the ECU 110, a reference code for analyzing the same,
And the vehicle diagnostic apparatus.
The apparatus according to claim 1, wherein the low-speed signal collecting communication unit
A low-speed signal collecting communication interface unit communicatively connected to the ECU 110 in the vehicle;
And a low-speed signal collecting communication transmitting / receiving section for collecting diagnostic codes and various signals from the ECU (110) in the vehicle and transmitting a control signal to the ECU (110).
The apparatus of claim 1, wherein the high-speed signal collecting waveform measuring unit
A waveform measurement interface unit for high-speed signal collection, the waveform measurement interface unit comprising a connection terminal such as a signal line of an in-vehicle component or a probe directly connected to a connector;
A high-speed signal collecting waveform measuring transmitter for receiving a component voltage value not provided by an ECU or requiring a high-speed communication as an analog waveform signal and directly transmitting a control signal to an in-
And the vehicle diagnostic apparatus.
The apparatus according to claim 1, wherein the low-speed signal collecting communication unit
An information signal related to the core parts of the automobile such as the engine failure diagnosis and the code, the injected fuel injection amount, the fuel consumption for one second, the cooling water temperature, the intake air temperature, the mission oil temperature, and the battery voltage provided by the ECU 110 Characterized in that the vehicle diagnostic apparatus.
The apparatus of claim 1, wherein the high-speed signal collecting waveform measuring unit
A crank angle sensor, a speed sensor, an ignition coil, and the like.
The apparatus of claim 1, wherein the controller (240)
Speed signal collecting communication unit 210 to the ECU 110 while measuring the output value of the component through the high-speed signal collecting waveform measuring unit 220 or from the high-speed signal collecting waveform measuring unit 220 Speed signal collecting communication unit (210) while directly transmitting a control signal to the in-vehicle component.

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