Abnormality diagnostic system and abnormality diagnostic data storing method

• US 6,898,494 B2
• Filed: 05/01/2001
• Issued: 05/24/2005
• Est. Priority Date: 05/01/2000
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nada, Mitsuhiro
• Primary Examiner(s): Black, Thomas G.
• Assistant Examiner(s): Tran, Dalena
• Application Number:
  US09/845,179
• Publication Number:
  US 20020002430A1
• Time in Patent Office: 1,484 Days
• Field of Search: 701/29, 701/35, 701/43, 700/79, 700/26, 700/27, 700/81, 714/1, 714/42, 714/736, 714/737, 702/182, 702/183, 702/185
• US Class Current: 701/35
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/50 Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
• CPC Class Codes: B60W 2050/0016 State machine analysis
• CPC Class Codes: B60W 2050/021 Means for detecting failure or malfunction
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/84 Data processing systems or methods, management, administration

Abstract

An abnormality judging section detects the occurrence of an abnormality based on various signals input to a master control CPU, and judges that abnormal event. A data selecting section selects inherent data which is inherent to the abnormal event in accordance with the judged abnormal event from data input to the master control CPU and data generated in the master control CPU. A writing section writes the freeze-frame data to an EEPROM together with nine common data irrespective of a difference in abnormal events. A reading section reads desired freeze-frame data from data stored in the EEPROM in accordance with a request from a diag tester.

Claims

1. An abnormality diagnostic system capable of storing on a vehicle abnormality diagnostic data corresponding to an abnormal event detected in the vehicle, comprising:

a common data storing section for storing, as the abnormality diagnostic data for a plurality of abnormal events, common data which is common against all abnormal events irrespective of the detected abnormal event; and

an inherent data storing section for storing in correspondence to the common data inherent data which is associated with and specific to a diagnostic code for the abnormal event detected,

said inherent data comprising data whose selection is determined in advance in correspondence to the abnormal event detected.

2. An abnormality diagnostic system according to claim 1, further comprising:

storing means for storing the abnormality diagnosis data;

abnormality judging means for judging an abnormal event when the abnormality is detected;

selecting means for selecting the inherent data corresponding to the judged abnormal event; and

writing means for writing the selected inherent data together with the common data to the storing means as the abnormality diagnostic data corresponding to the abnormal event.

3. An abnormality diagnostic system according to claim 2, wherein the common data includes data indicative of behavior of the vehicle.

4. An abnormality diagnostic system according to claim 2, wherein a data length of the inherent data is constant irrespective of a difference in the abnormal events.

5. An abnormality diagnostic system according to claim 2, wherein the inherent data includes a plurality of data, and a data length of each data is constant.

6. An abnormality diagnostic system according to claim 2, wherein the storing means includes a common storing region in which each of the inherent data can be commonly stored, and

wherein the writing means writes the inherent data to the common storing region.

7. An abnormality diagnostic system according to claim 6, wherein the common data includes data indicative of a behavior of the vehicle.

8. An abnormality diagnostic system according to claim 6, wherein a data length of the inherent data is constant irrespective of a difference in the abnormal events.

9. An abnormality diagnostic system according to claim 6, wherein the inherent data includes a plurality of data, and a data length of each data is constant.

10. An abnormality diagnostic system according to claim 1, wherein the common data includes data indicative of a behavior of the vehicle.

11. An abnormality diagnostic system according to claim 10, wherein a data length of the inherent data is constant irrespective of a difference in the abnormal events.

12. An abnormality diagnostic system according to claim 10, wherein the inherent data includes a plurality of data, and a data length of each data is constant.

13. An abnormality diagnostic system according to claim 1, wherein a data length of the inherent data is constant irrespective of a difference in the abnormal events.

14. An abnormality diagnostic system according to claim 13, wherein the inherent data includes a plurality of data, and the data length of each data is constant.

15. An abnormality diagnostic system according to claim 1, wherein the inherent data includes a plurality of data, and a data length of each data is constant.

16. An abnormality diagnostic system according to claim 1, wherein the common data and the inherent data corresponding to detected abnormal events are stored in the common data storing section and the inherent data storing section respectively, as long as there are unused memory locations in the common data storing section and the inherent data storing section.

17. An abnormality diagnostic system according to claim 1, wherein the common data and the inherent data corresponding to a first abnormal event are stored in a first memory area which is different from a second memory area in which the common data and the inherent data corresponding to a second abnormal event are stored.

18. An abnormality diagnostic system according to claim 1, wherein the common data and inherent data corresponding to successively occurring and substantially same abnormal events, are stored in the common data and inherent data storing section for each of the substantially same abnormal events.

19. An abnormality diagnostic system according to claim 1, wherein the common data includes data indicative of a behavior of the vehicle, and

wherein the inherent data includes data of a component which relates to the abnormal event.

20. An abnormality diagnostic system according to claim 1, wherein the inherent data includes data of a component which relates to the abnormal event.

21. An abnormality diagnostic system according to claim 1, wherein the inherent data and common data corresponding to successively detected abnormal events are stored in an order in which the abnormal events are detected.

22. An abnormality diagnostic system according to claim 1, wherein in addition to storing the inherent data corresponding to abnormalities in an order in which the abnormal events are detected, numbers or symbols corresponding to the order are also stored together with a diagnostic code and freeze-frame data as the inherent data.

23. An abnormality diagnostic data storing method for storing on a vehicle, in a memory, abnormality diagnostic data corresponding to an abnormal event detected in the vehicle, comprising:

judging an abnormal event when an abnormality is detected;

selecting at least inherent data which is associated with the abnormal event;

storing selected inherent data in the memory as abnormality diagnostic data corresponding to the abnormal event for a plurality of abnormal events; and

storing said selected inherent data in correspondence to common data which is common against all abnormal events irrespective of the detected abnormal event, the selected inherent data associated with and specific to a diagnostic code for the abnormal event detected,

said inherent data comprising data whose selection is determined in advance in correspondence to the abnormal event detected.

24. An abnormality diagnostic data storing method according to claim 23, wherein the common data includes data indicative of behavior of the vehicle.

25. An abnormality diagnostic data storing method according to claim 23, wherein a data length of the inherent data is constant irrespective of a difference in the abnormal events.

26. An abnormality diagnostic data storing method according to claim 23, wherein the inherent data includes a plurality of data, and a data length of each data is constant.

27. An abnormality diagnostic system capable of storing on a vehicle abnormality diagnostic data corresponding to an abnormal event detected in the vehicle, comprising:

a processor configured to identify the detected abnormal event with a diagnostic code;

a common data storing section configured to store, as the abnormality diagnostic data for a plurality of abnormal events, common data which is common against all abnormal events irrespective of the detected abnormal event; and

an inherent data storing section configured to store, in correspondence to the common data, data selectively obtained in accordance with the diagnostic code, the data being identified as inherent data associated with and specific to a diagnostic code for the detected abnormal event,

said inherent data comprising data whose selection is determined in advance in correspondence to the detected abnormal event.

28. An abnormality diagnostic data storing method for storing on a vehicle, in a memory, abnormality diagnostic data corresponding to an abnormal event detected in the vehicle, comprising:

identifying a detected abnormal event with a corresponding diagnostic code;

selecting, based on the diagnostic code corresponding to the detected abnormal event, at least inherent data which is associated with the detected abnormal event;

storing the selected inherent data in the memory as abnormality diagnostic data corresponding to the detected abnormal event for a plurality of abnormal events; and

storing, together with said abnormality diagnostic data, in correspondence to the inherent data common data which is common against all abnormal events irrespective of the detected abnormal event,

said inherent data comprising data whose selection is determined in advance in correspondence to the detected abnormal event.

29. An abnormality diagnostic system capable of storing on a vehicle abnormality diagnostic data corresponding to an abnormal event detected in the vehicle, comprising:

a common data storing means for storing, as the abnormality diagnostic data for a plurality of abnormal events, common data which is common irrespective of the detected abnormal event and which includes data indicative of behavior of the vehicle; and

an inherent data storing means for storing in correspondence to the common data inherent data which is associated with and specific to a diagnostic code for the abnormal event detected and includes data of a component which relates to the detected abnormal event,

said inherent data comprising data whose selection is determined in advance in correspondence to the detected abnormal event.

30. An abnormality diagnostic system capable of storing on a vehicle abnormality diagnostic data corresponding to an abnormal event detected in the vehicle, comprising:

a common data storing section configured to store, as the abnormality diagnostic data for a plurality of abnormal events, common data which is common against all abnormal events irrespective of the detected abnormal event; and

an inherent data storing section configured to store in correspondence to the common data inherent data which is associated with and specific to a diagnostic code for the detected abnormal event,

said inherent data comprising data whose selection is determined in advance in correspondence to the detected abnormal event.

31. An abnormality diagnostic system according to claim 30, further comprising:

a memory configured to store the abnormality diagnostic data;

a processor configured to judge an abnormal event when an abnormality is detected;

a selecting unit configured to select the inherent data corresponding to the judged abnormal event; and

a writing unit configured to write the selected inherent data together with the common data to the memory as the abnormality diagnostic data corresponding to the abnormal event.

32. An abnormality diagnostic system according to claim 31, wherein the common data includes data indicative of a behavior of the vehicle.

33. An abnormality diagnostic system according to claim 31, wherein a data length of the inherent data is constant irrespective of a difference in the abnormal events.

34. An abnormality diagnostic system according to claim 31, wherein the inherent data includes a plurality of data, and a data length of each data is constant.

35. An abnormality diagnostic system according to claim 31, wherein the memory includes a common storing region in which each of the inherent data can be commonly stored, and

wherein the writing unit writes the inherent data to the common storing region.

36. An abnormality diagnostic system according to claim 35, wherein the common data includes data indicative of a behavior of the vehicle.

37. An abnormality diagnostic system according to claim 35, wherein a data length of the inherent data is constant irrespective of a difference in the abnormal events.

38. An abnormality diagnostic system according to claim 35, wherein the inherent data includes a plurality of data, and a data length of each data is constant.

39. An abnormality diagnostic system according to claim 30, wherein the common data includes data indicative of a behavior of the vehicle.

40. An abnormality diagnostic system according to claim 39, wherein a data length of the inherent data is constant irrespective of a difference in the abnormal events.

41. An abnormality diagnostic system according to claim 39, wherein the inherent data includes a plurality of data, and a data length of each data is constant.

42. An abnormality diagnostic system according to claim 30, wherein a data length of the inherent data is constant irrespective of a difference in the abnormal events.

43. An abnormality diagnostic system according to claim 42, wherein the inherent data includes a plurality of data, and the data length of each data is constant.

44. An abnormality diagnostic system according to claim 30, wherein the inherent data includes a plurality of data, and a data length of each data is constant.

45. An abnormality diagnostic system according to claim 30, wherein the common data and the inherent data corresponding to detected abnormal events are stored in the common data storing section and the inherent data storing section respectively, as long as there are unused memory locations in the common data storing section and the inherent data storing section.

46. An abnormality diagnostic system according to claim 30, wherein the common data and the inherent data corresponding to a first abnormal event are stored in a first memory area which is different from a second memory area in which the common data and the inherent data corresponding to a second abnormal event are stored.

47. An abnormality diagnostic system according to claim 30, wherein the common data and inherent data corresponding to successively occurring and substantially same abnormal events, are stored in the common data storing section and inherent data storing section for each of the substantially same abnormal events.

48. An abnormality diagnostic system according to claim 30, wherein the common data includes data indicative of a behavior of the vehicle, and

wherein the inherent data includes data of a component which relates to the abnormal event.

49. An abnormality diagnostic system according to claim 30, wherein the inherent data includes data of a component which relates to the abnormal event.

50. An abnormality diagnostic system according to claim 30, wherein the inherent data and common data corresponding to successively detected abnormal events are stored in an order in which the abnormal events are detected.

51. An abnormality diagnostic system according to claim 30, wherein in addition to storing the inherent data corresponding to abnormalities in an order in which the abnormalities are detected, numbers or symbols corresponding to the order are also stored together with a diagnostic code and a freeze-frame data as the inherent data.