KR0134741B1 - Car fault diagnostic method - Google Patents

Abstract

The present invention relates to a vehicle fault diagnosis recording method, and more specifically, when a failure occurs in various operating parts and sensors while the vehicle is in operation, accurate diagnosis of the failure part, duration of a failure state, fluctuations in output values, and the like are described. After recording, it can be reproduced by computer at any time to analyze data during recording time, to check the control status and failure state of the vehicle system, and to use the statistical data for safe driving.

That is, a backup unit that preserves vehicle trouble data while driving and a data storage unit that continuously stores data even when there is no power supply, and a data storage unit that continuously stores any abnormality of the vehicle. It is a data control unit for instantaneous trouble capture and real-time part that checks the vehicle operation time and trouble detection time, data recording function, trouble analysis data storage function and sensor graph output function. It is a fault diagnosis recording method that can display the entire service data function on the monitor from the data stored in the computer.

Description

Vehicle failure record

1 is an overall block diagram according to the present invention

2 is a block diagram showing a process of storing a driving record store according to the present invention.

Figure 3 is a block diagram showing the data analysis by computer of the present invention

4 is a block diagram of a computer operation according to the present invention.

5 is a state diagram in which the driving record store according to the present invention is mounted on a vehicle.

7 is an overall configuration circuit of the present invention.

The present invention relates to a vehicle fault diagnosis recording method, and more specifically, when a failure occurs in various operating parts and sensors during driving, accurate diagnosis of the failure part, duration of failure state, fluctuation of output value, etc. After recording the data, play it back to the computer at any time to analyze the data during the recording time, and to check the control status and the fault condition of the vehicle system for safe operation.

In the past, there was a vehicle operation recorder (aka scanner) that can check the trouble spot of the vehicle. However, when there is no power supply, there is no backup function. It is very inconvenient because it can only be used and its storage method is also made manually.

In addition, since there is no graph output, printing, fault location analysis and overall analysis function by computer, it is impossible to detect instantaneous faults occurring during operation, and it is impossible to confirm the vehicle operation time and the time of fault detection. This was not done.

The present invention relates to a vehicle fault diagnosis recording method for solving such a problem and described in detail by the accompanying drawings as follows.

FIG. 1 is a block diagram of the present invention, which includes a central processing unit 1 for receiving and operating all driving record stores, an input unit 2 for generating manual and automatic, computer, and reset signals, and a driving record store A. FIG. Reset section 3 for initializing all the integrated circuits IC, execution program section 4 for the operation record storage A to operate, data, buffers, etc. for the execution program to operate. A temporary commercial space section 5, a liquid crystal display (LCD) output section 6, a buzzer 7, and an address for storing data detected in an automatic or manual fault situation for temporarily using A data adjusting unit (8) for counting, a data storing unit (9) for storing fault codes and service data when an automatic or manual situation occurs, and a computer communication unit (10) for transmitting and receiving the stored data in the data storing unit to a computer; Data backup unit for saving data even without power 11), a real-time unit 12 for knowing the current time even without power, a power supply unit 13 for supplying power for the driving record storage A to operate, and for reading data from a vehicle. It consists of a communication clock setting unit 14 for setting a clock that can communicate with each other, and a data input / output unit 15 for reading data, and 16 is mounted on the vehicle as a troubleshooting connector.

2 is a block diagram showing the storage process by the driving record store A. The driving recorder checks the data from the fault diagnosis connector 16 when the vehicle is running, and stores the fault code and service data when a fault occurs. The system stores service data automatically or manually in the event of a fault code acquisition and engine speed 200-400 RPM. The driving record storage (A) is a backup function for storing the data of the vehicle trouble situation during operation and for storing data even when there is no power, and the data of the abnormality of the vehicle is automatically and manually stored by storing 20 banks (BANK). There is a record storage that can be stored continuously without any problem, and it automatically saves when a trouble spot occurs during the operation of the vehicle.In case of an abnormality of the vehicle, there is a record storage function that is stored manually. It is possible to capture and detect the abnormality of the vehicle by buzzer in case of momentary breakdown condition or vehicle abnormality, and by detecting and storing the abnormality data of manual transmission and automatic transmission at the same time. Which has a real-time clock function.

3 is a block diagram showing data analysis by a computer. The computer receives data stored in the driving record store A, stores the data in a hard disk, and analyzes and checks the data on a screen and a printer.

In the above computer, a graph output function for reading data stored in the bank of the driving record store into a computer and displaying the graph on a monitor, and a data print function for printing the data stored in the bank on a printer. Fault area analysis data that can read the data stored in the bank (BANK) to a computer and store it in a computer for analysis by the type of the vehicle. It has the function to enlarge the graph to check the status and to display all the sensor data on the monitor.

4 is a computer motion block diagram, which allows analysis of various data and checks of control states and failure conditions.

FIG. 5 is an outline view of a driving record store, FIG. 6 shows a vehicle mounting state of the driving record store, and FIG. 7 is a circuit diagram showing the overall configuration of the present invention.

The present invention always checks the state of the fault location while storing in 127 buffers until -127, -126, -125 ... -1 before the fault code occurs again if there are no fault points Looping through -127, -126, ... -1 is shown as a table in Table 1.

Table 1

* After a failure: The backup memory storage location becomes 0 and saves up to +127 and corrects it before failure again.

If a fault code occurs above, stop at any one of -127, -126 .....- 1, move the storage location to 0, save the current sensor value up to 1 .... 127, and Is stored in DIAG, DIAG1, and DIAG2. Since one buffer is 8 bits in 1 byte, it checks the bit position. In addition, it is shown in the table in Table 2 that the operation status is known.

TABLE 2

If the engine speed of the vehicle falls between 200-400 RPM after receiving data from the self-diagnosis indexer, it is treated like a storage method when a fault code is generated.

The data storage format and backup memory storage format of the real-time buffer are as shown in Tables 3 and 4.

TABLE 3

# 01- # 10: Always check the data of the vehicle and save the location of the trouble when it occurs.

# 11-# 12: Set the number of the black box (recorder) at the time of shipment.

# 13: Save the code of the vehicle (can be added later)

# 14-# 16: Save the bank position of backup data.

(The value changes each time you save the trouble spot data.)

# 17: save the bank whenever there is a fault.

(Up to 20 banks can be stored)

# 18: Store the number of fault codes when a fault occurs.

# 19-# 21: Store 3 error code buffers.

(You can check the fault code buffer to check the fault item.)

# 22-# 24: Save the setting time of the vehicle to record.

Ex) June 20, 94

Table 4

# 01, # 02: Save computer number of vehicle

# 03-# 05: breakdown code of vehicle

# 06: Save coolant temperature

# 07: Save Throttle Position

# 08: Save throttle position percentage value

# 09: Save engine speed (RPM)

# 10: Save vehicle speed

# 11: Save oxygen input

# 12: Save block display

# 13: Save the INTERGRATOR value

# 14: Save step motor value

# 15: Save request speed

# 16: Suction hold pressure sensor value (1) storage

# 17: Save suction manifold pressure sensor value (2)

# 18: Save water temperature sensor value

# 19: Save battery value

# 20: Save spark timing

# 21: Save engine speed

# 23- # 26: Vehicle switch (S / W) operation value saving

# 27: Save air-fuel ratio

# 28-# 32: Save the fault duration time

# 33-# 35: NONE

*** There are 20 banks as above.

On the other hand, the control state data format of the driving record storage is performed as illustrated in Table 5.

Table 5

# 1 = code value of the vehicle with the black box (recorder)

# 2 = fault code value in case of TRIG

# 3 = current time when trouble occurs

# 4 = storage location point value in case of failure

# 5 = BANK COUNT value (up to 20)

# 6 = NONE

# 7 = space (-127 ~ +127) to be saved when fault occurs

* There are 20 data formats as above.

The sensor output as shown in the graph shown in Table 6 shows the output screen to accurately diagnose the various failures of the various operating parts and sensors that occur during the operation of the vehicle, analyze the duration of the failure state and the variation of the output value. It is to check the overall failure condition of the system and to use it as a statistical data for safe operation.

Claims (1)

The backup unit keeps the data of the vehicle's failure points during operation and saves the data even when there is no power. The data storage unit continuously stores the vehicle's abnormalities. A data recorder that can be stored manually in the system to capture instantaneous faults, a real-time unit that checks the vehicle's operating time and fault spot detection time, prints data, and stores fault analysis data. And the sensor graph output function and the entire function of the service data can be displayed on the monitor from the data stored in the computer.