Vehicle abnormality diagnosis system

• US 6,435,018 B1
• Filed: 04/20/2000
• Issued: 08/20/2002
• Est. Priority Date: 04/21/1999
• Status: Expired due to Term

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Murakami, Taku, Hashimoto, Haruo, Ichikawa, Ichio, Satou, Fumihide
• Primary Examiner(s): Fuller, Benjamin R.
• Assistant Examiner(s): STEVENS, MAURICE E
• Application Number:
  US09/553,549
• Time in Patent Office: 852 Days
• Field of Search: 731/16, 731/173, 731/172, 731/21, 731/28, 701/48, 701/213, 701/208, 701/29, 340/992, 340/439, 340/438
• US Class Current: 73/114.01
• CPC Class Codes: G01C 21/20 Instruments for performing navigational calculations G01C21/24, G01C21/26 take precedence
• CPC Class Codes: G01M 17/007 Wheeled or endless-tracked vehicles G01M17/08 takes precedence
• CPC Class Codes: G08G 1/20 Monitoring the location of vehicles belonging to a group, e.g. fleet of vehicles, countable or determined number of vehicles

Abstract

Either a specified point Q or a specified area Ar, at which an operating condition of a vehicle becomes a specified operating condition, is set beforehand from among points or areas on a travel route along which a vehicle travels. Then, an operating parameter P of a point in time ts1, ts2, ts3, ts4 . . . , tsn, at which a vehicle passes either a specified point Q or a specified area Ar, is obtained. Then, a vehicle abnormality is diagnosed on the basis of the values of these obtained operating parameters P (maximum values Pmax).

Claims

1. A vehicle abnormality diagnosis system for acquiring an operating parameter under a specified operating condition of a vehicle, a value of the operating parameter changing during an operation of the vehicle, and for diagnosing a vehicle abnormality on the basis of the value of the acquired operating parameter, wherein

either a specified point or a specified area, at which the vehicle operating condition becomes the specified operating condition, is set beforehand from among points or areas on a travel route along which the vehicle travels, and

an operating parameter of a point in time, at which the vehicle passed either the specified point or the specified area, is acquired, and an abnormality of a vehicle is diagnosed on the basis of a value of the acquired operating parameter.

2. The vehicle abnormality diagnosis system according to either claim 1, wherein the operating parameter is sequentially stored by corresponding the operating parameter to a time at which the operating parameter was acquired, and diagnosis of a vehicle abnormality is performed on the basis of time series data of the stored sequential operating parameters.

3. A vehicle abnormality diagnosis system for acquiring an operating parameter under a specified operating condition of a vehicle, a value of the operating parameter changing during an operation of the vehicle, and for diagnosing a vehicle abnormality on the basis of the value of the acquired operating parameter, comprising:

setting means for setting beforehand from among points or areas on a travel route along which the vehicle travels, either a specified point or a specified area at which an operating condition of the vehicle becomes the specified operating condition;

position detecting means for detecting a location of the vehicle when the vehicle is travelling on the travel route;

trigger signal generating means for generating a trigger signal when the location detected by the position detecting means becomes a location corresponding to either the specified point or specified area;

operating parameter acquiring means for acquiring an operating parameter in accordance with the trigger signal being generated; and

abnormality diagnosing means for diagnosing a vehicle abnormality on the basis of a value of the acquired operating parameter.

4. The vehicle abnormality diagnosis system according to claim 3, wherein the operating parameter is sequentially stored by corresponding the operating parameter to a time at which the operating parameter was acquired, and diagnosis of a vehicle abnormality is performed on the basis of time series date of the stored sequential operating parameters.

5. A vehicle abnormality diagnosis system for acquiring data related to blow-by pressure under a specified operating condition of a vehicle, a value of the data changing during an operation of an engine of the vehicle, and for diagnosing a vehicle abnormality on the basis of the value of the acquired blow-by pressure-related data, wherein

either a specified point or a specified area, at which blow-by pressure rises and the blow-by pressure overshoots, is set beforehand from among points or areas on a travel route along which the vehicle travels, and

a blow-by pressure overshoot quantity of a point in time, at which the vehicle passes either the specified point or the specified area, is acquired, and a vehicle abnormality is diagnosed on the basis of a value of the acquired blow-by pressure overshoot quantity.

6. A vehicle abnormality diagnosis system for acquiring data related to blow-by pressure, a value of the data changing during an operation of an engine of a vehicle, and for diagnosing a vehicle abnormality on the basis of the value of the acquired blow-by pressure-related data, comprising:

blow-by pressure overshoot quantity measuring means for measuring an overshoot quantity when blow-by pressure rises and the blow-by pressure overshoots; and

abnormality diagnosing means for diagnosing a vehicle abnormality on the basis of a value of the measured blow-by pressure overshoot quantity.