JP2002073153A - On-vehicle fault diagnostic communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To load a system on a vehicle for previously diagnosing a vehicle fault, with which traveling on the road is disabled or vehicle falls into traveling fault, and speedily taking temporary measures from the provided diagnosed result and data. SOLUTION: While using the existent sensor of engine system/motive force transmission system related to the vehicle fault to cause the traveling fault, the presence/absence of a control pulse and a deviation from a normal value area are diagnosed, the diagnosed result is transmitted to a repair institution while using communication equipment of mobile object loaded on the vehicle, the temporary measures/repair estimates are compared and the best measures and estimate are selected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention autonomously determines a failure level at which a vehicle cannot travel on a road or may cause a driving obstacle based on a signal level obtained from a sensor or electric and electronic wiring. The present invention relates to a vehicle failure diagnosis and notification system that transmits this failure information to a diagnostic maintenance organization using a vehicle-mounted mobile communication device and requests an emergency measure.

[0002]

2. Description of the Related Art Conventionally, automobile maintenance organizations have
The diagnostic information of the BD-2 (On Board Diagnosisphase-2) system and the in-vehicle diagnostic system for domestic use has been output by a dedicated reading diagnostic device and used as maintenance information together with the off-board CPU diagnostic device. However, currently, the on-vehicle diagnostic device is an obligatory device that voluntarily regulates the exhaust gas deterioration rate so as not to exceed three times the regulated value, and is not for failure diagnosis. In-vehicle failure diagnosis is difficult to complete due to the manufacturer's warranty and has not been put to practical use. These pieces of diagnostic information are not displayed on-board as diagnostic results.

In response to this situation, recently, Ford Mot
According to the information released by the or company, a system that allows users to make reservations for regular inspections through the Internet communication at the maintenance department of dealers, or Hitachi Mobile Inc. will use the OBD-2 system's diagnostic information to provide on-vehicle diagnostic equipment HDM (Hita
chi Diagnostic Module), and in-vehicle equipment related to failure predictive diagnosis has been in full swing.

On the other hand, CAN (Controller Area Network)
Control diagnosis information of the vehicle via CIS (Car Information Sy
It is becoming a real technology to quickly and inexpensively communicate control diagnostic information of vehicles on the Internet at high speed and inexpensively by obtaining CIS and mobile phones through packet communication with Blue tooth.

[0005]

According to the Automobile Technology Handbook 4 (Production, Quality and Maintenance 1991.9: JAF Statistical Data), the locations of vehicle failures on expressways and general roads by system type were identified in 1977 and 1983.・ The average number of cases for three years in 1988 is, from the largest order, fuel system, engine electronic system, tire system, engine cooling system, and transmission system.

Therefore, in the present invention, 1) engine ignition system / battery system, 2) engine fuel system / cooling system, 3) power A first problem was to narrow down to three transmission oil systems and to detect and diagnose vehicle failure prediction for each of these systems.

A second problem is to execute a quick emergency response and a permanent countermeasure by a simple operation using a mobile data communication terminal in order to thoroughly prevent failure.

[0008]

Means for Solving the Problems In order to solve the above-mentioned problems, the vehicle fault diagnosis / reporting system of the present invention employs the following means.

First, the higher the rank of a system having a higher failure statistical probability, the higher the importance of failure diagnosis. That is, the order of importance of the three systems: 1) engine ignition system / battery system, 2) engine fuel system / cooling system, and 3) power transmission oil system.

Next, as the diagnostic sensor, an existing sensor is used as much as possible, and a fault level is set as an alarm slice level in addition to the output of the sensor. At this time, this is corrected to eliminate the initial variation of the sensor output.

The report of the recorded in-vehicle diagnosis result is transmitted from the mobile data communication terminal to the maintenance organization. After receiving the report, the maintenance organization will communicate with the user using the mobile communication means such as a mobile phone to confirm the diagnosis results, predict the repair of parts, and maintain the operation, etc., and plan a maintenance plan for emergency measures and permanent countermeasures. After confirming that a maintenance order is to be placed, a notification of a quote request from the maintenance organization to the parts supply organization is sent by e-mail or the like.

Based on the result of actually inspecting and diagnosing the faulty vehicle stored in the maintenance facility, an estimate including the maintenance diagnosis man-hours for parts repair / operation adjustment and the parts purchase price is output and handed over to the user.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing sensors used in an on-vehicle apparatus for predicting and diagnosing a failure that may cause a car to be unable to travel on a road or cause a driving obstacle, and its use.
In the present invention, instead of newly installing a sensor exclusively for failure diagnosis, a main system of an automobile, that is, an engine, a vehicle (wheel, suspension, brake, steering),
The main purpose is to share sensors used for control, alarm, and display in information transmission (instrument panels and airbags). The sensor in bold red shown in the area of the active sensor in the drawing is also used as a sensor, and information of an existing diagnostic device such as a chassis (vehicle) self-diagnosis or a fuse monitor may be diverted.

[0015] The diagnostic level in the present invention is set for the purpose of predicting a serious failure which may cause a driving failure, so to speak, whereas the existing diagnostic level is not necessarily related to the driving failure. When the deviation from the initial value / steady value is large, an alarm is issued, and measures are taken as an early measure in relation to the emission control. Therefore, it is necessary to change the alarm level for the purpose of predicting a traveling obstacle.

FIG. 2 shows an embodiment of six systems of operation systems used as fault diagnosis information and diagnosis levels employed in the present invention.

The failure diagnosis of the engine ignition system 21 uses the ignition timing control unit in the engine electronic control system as it is. That is, a trigger is generated for each cylinder at an ignition timing according to the engine operating condition from the start to the stop of the engine. The presence or absence of this trigger is monitored by the diagnostic terminal 22 shown in the table. If no ignition pulse is generated due to engine rotation other than cranking, it is determined that the ignition plug has misfired or the ignition timing control system is defective.

The inability to supply power to the battery system 23, which is the power source for all of the vehicle's electronic and electrical systems, is diagnosed by insufficient battery voltage due to charging failure. Diagnosis monitors the battery voltage while power is being supplied to the load, and issues a failure alarm at a battery voltage of 9.0 V or less, which causes a malfunction in the electronic / electrical system.

The failure diagnosis of the engine fuel system 24 uses the fuel injection valve opening time control section in the engine electronic control system as it is. That is, from the start of the engine to the stop, the presence or absence of a fuel injection valve opening time trigger according to the engine operating condition is monitored at the illustrated diagnostic terminal 25, and if the fuel injection command pulse is not generated with the rotation of the engine, the fuel It is determined that the injection valve is blocked and the fuel injection system is defective.

A failure such as a cooling failure of the engine cooling system 26 is diagnosed by detecting overheating of the engine by the cooling water temperature sensor 27. Diagnosis is 95 ° C overheat after engine warm-up
Is detected by the comparator 28 and a failure is reported.

The power transmission unit clutch control hydraulic pressure 29 is controlled in a closed loop by an electronic circuit, and a diagnosis is made based on the presence or absence of a control pulse of the linear solenoid valve 210.

Power transmission section automatic transmission line control oil pressure 21
1 is closed-loop controlled by an electronic circuit similarly to the clutch control hydraulic pressure, and diagnoses based on the presence or absence of a control pulse of the line pressure solenoid valve 212.

When electronic control such as closed-loop control or program control is roughly divided into diagnostic methods, the presence or absence of a control signal in the loop may be determined according to the operating state, and the position to be diagnosed is not specified. When the comparator is operated at the failure level, such as the battery voltage and the water temperature, to determine the detection point, the detection point is specified.

FIG. 3 is a diagram showing a simple operation of maintenance of a vehicle using a mobile communication device mounted on a vehicle when the vehicle autonomously detects and determines that a failure that impedes road running or obstructs driving has occurred. The diagnostic data is sent to the institution,
Have them reply with the procedure prescription and the schedule of the maintenance plan,
FIG. 9 is a process flow chart showing a process after deciding to order this maintenance.

The on-vehicle diagnosis system 30 includes a vehicle control system 31. On-board real-time vehicle operation data is recorded by a drive recorder 32 from three main vehicle control systems, and the CIS (Car Information) is provided.
System) 33, monitor on a navigation screen 34, and store abnormal data in a memory card 36 with a memory card reader 35.

According to the vehicle maintenance manual installed in the CIS 33, the user (driver) first knows the part deterioration information 37 on the navigation screen, and obtains the part deterioration information 3
7 is immediately notified to the car dealer's parts maintenance (maintenance) company 310 via the service company 39, and issues a parts arrangement instruction 311. This arrangement instruction information is also transmitted to the user through the maintenance company introduction 312 and displayed on the navigation screen by the maintenance method 313. The process up to this point is performed as a routine.

Further, if necessary, the data of the memory card is provided to the service company in the flow of the memory card 314, and the data is compared with the stored past data there.
The maintenance result is confirmed in the maintenance result 315. If it is determined that the vehicle should be checked before the maintenance is started, the user receives a predetermined city driving pattern 316 from the service company, collects driving data, and transmits the obtained driving pattern result 317 to the service company. And have them judge the maintenance results. Note that 318 and 319 show a process when the user replaces the car.

As described above, the user needs the service company to
If you request maintenance preparatory work offline or remotely, or if you entrust past data, you can also request the lighting of the driving history or a proxy for trade-in assessment.

FIG. 4 shows a remote maintenance method which is used when the contents of the maintenance can be grasped only by data transmission of the drive recorder without bringing a car to a maintenance company. The process will be specifically described with reference to FIG.

The sensor of the diagnostic device 40 mounted on the vehicle, the data processing device thereof, the past city running data of the actual vehicle, and the running test data which is determined to be necessary cannot be as wide as a test stand. However, it can be said that it is sufficient for normal failure diagnosis without an accident.

In FIG. 4, the drive recorder 41 of the in-vehicle system 40 takes in a measured value only when the measured value exceeds a predetermined range in order to use the memory capacity efficiently (the measured value is measured within a predetermined time or more). Data (email) transmission when the number exceeds. If the user does not replace the part based on the diagnosis result by himself / herself, and selects a part purchase dealer from A and B, the navigation screen 34 displays a route to the selected dealer. Until the measured value is determined to be an abnormal value, the reliability of the determination is increased by providing a condition that the abnormal value is reproduced a predetermined number of times during a predetermined time. For example, the engine cooling water abnormal temperature is experimentally set to a slice level of 75 ° C. at the position of the water temperature sensor 42. At this time, a wear check is performed based on the thickness of the brake pad 43, and 1
The result of 4mm is also output.
There is no problem level. As illustrated in the figure, the maintenance data 44 is stored as a list of a car ID, a test date and time, a tester, a test item, test result data, and a result evaluation (a target portion and a measured value are level determined). . The diagnosis information and the dealer list are transmitted. This data is stored in the memory of the in-vehicle diagnostic device, and is also transmitted to the service company 45 that has made a maintenance contract to share the data. On the service company side, the mechanic looks at the data, comments to the user at 46, and replies to the maintenance order from the user.
Wait for 7.

When the user places an order for a maintenance order and receives the parts receipt mail 47, the maintenance company places an order with the dealer parts sales department 48 and a maintenance (maintenance) company, and immediately after receiving the parts, keeps the car from the user and performs maintenance. Start. In the current market, when using genuine parts, there is no choice in terms of price, and the maintenance company selected in the competitive estimate will only sell parts replacement man-hours.

[0033]

According to the present invention, cost increase is suppressed by using a sensor used in a main system which may cause a driving obstacle, and an abnormal value is detected by comparing with a steady value. Improve the accuracy of diagnosis, because it is a predictive diagnosis, it is possible to respond to emergency measures and permanent measures with plenty of time, and because it has diagnostic data in the in-vehicle device, it is not used by a maintenance contractor and can be used as data when replacing a car it can. Diagnosis of future private cars
It is likely to be a standard model for maintenance.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle-mounted diagnostic sensor according to the present invention.

FIG. 2 is a system diagram showing a failure diagnosis method of the present invention and a comparison table showing diagnosis levels.

FIG. 3 shows an in-vehicle diagnostic device, a data recording storage device,
FIG. 2 is a block diagram illustrating a system configuration including a diagnostic data transmitting / receiving device.

FIG. 4 shows an in-vehicle diagnostic device, a data recording storage device,
FIG. 2 is a block diagram illustrating an operation state of a system including a diagnostic data transmission / reception device.

[Explanation of symbols]

21 ... Engine ignition system, 22 ... Diagnostic terminal, 23 ...
Battery system, 24 engine fuel system, 25 diagnostic terminal, 26 engine cooling system, 27 cooling water temperature sensor, 2
8: comparator, 29: power transmission unit clutch control oil pressure, 30
... Diagnostic system, 31 ... Vehicle control system, 32 ... Drive recorder, 33 ... CIS, 34 ... Navigation screen, 35 ... Card reader, 36 ... Memory card, 37 ...
Parts deterioration information, 210: Linear solenoid valve, 21
1 ... power transmission unit automatic transmission line control hydraulic pressure, 212 ... line pressure solenoid, 310 ... maintenance (maintenance) company, 311 ... parts arrangement instruction, 313 ... maintenance method, 315 ... maintenance result, 317 ... running pattern result.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F02D 45/00 310 F02D 45/00 310S 310Q 345 345Z F02P 11/00 F02P 11/00 B 11/06 11 / 06 (72) Inventor Takashi Nakahara 7-1-1, Omika-cho, Hitachi City, Ibaraki Prefecture F-term in Hitachi Research Laboratory, Hitachi Ltd. 3G019 CA11 GA05 LA13 3G084 BA11 BA16 BA30 BA33 DA27 DA28 EA03 EA04 EA07 EA11 EB22 FA03 FA11 FA20 FA25 FA27 FA33 FA35 FA38 3G301 HA01 JB10 PB00B PE01B 5H223 AA10 CC01 DD07 EE05 EE13

Claims (4)

[Claims] The present invention relates to three systems of statistics relating to vehicle failures in which the running failure rate of an automobile is high and there is no emergency repair means, 1) engine ignition system / battery system, 2) engine fuel system / cooling system, 3).
Regarding the power transmission oil system, from among the signals in the electronic control system or diagnostic display system that are installed as standard,
The system is configured to detect and determine the occurrence of a failure that could become a driving obstacle, transmit diagnostic data to the vehicle diagnostic and maintenance organization using the on-board mobile communication device, and request emergency measures or countermeasures for the maintenance plan. A vehicle failure alarm reporting system, characterized in that: 2. A failure diagnosis method according to claim 1, wherein the ignition is performed by sequentially igniting an air-fuel mixture in a cylinder, and an ignition timing control signal controlled by a closed loop is provided. Diagnosis is made by determining whether or not to output an ignition pulse linked to the engine speed, and whether the battery charged by the generator driven by the engine outputs a predetermined output voltage> 9.0 V A vehicle failure alarm reporting system for diagnosing by determining whether or not the failure has occurred. 3. The fuel pressure control solenoid valve according to claim 1, wherein a failure diagnosis method that can be a driving obstacle in the engine fuel system / cooling system is performed when fuel is supplied by a pump and closed loop control is performed to a required pressure. Diagnosis is made by determining whether or not the excitation voltage indicates intermittent operation. When the engine cooling water is circulated by the pump and the engine is cooled to the required temperature after the engine is warmed up, engine control is performed. A vehicle failure alarm notification system for making a diagnosis by detecting that a cooling water temperature sensor for the engine indicates an engine overheating temperature> 95 ° C. 4. A method of diagnosing a power transmission oil system as a failure which may cause a traveling failure in a power transmission oil system, wherein when a clutch oil and a transmission oil are supplied by a pump and closed loop control is performed to a required pressure, a hydraulic control solenoid valve is provided. A vehicle failure alarm reporting system for diagnosing by detecting whether the excitation voltage periodically indicates an intermittent operation.