Title:
【発明の名称】ターボヒータ装置のセンサの故障診断装置
Document Type and Number:
Japanese Patent JP3067324
Kind Code:
B2
Abstract:
PURPOSE:To judge which one of the sensors for a turbo heater device is in a trouble by providing a judging device which, when the values detected by sensors belong to two of three domains, judges that one of three sensors associated with the detection of the two domains at the same time, is in the trouble. CONSTITUTION:A rotating speed of a turbo heater 9 is controlled by an exhaust control valve 13. The rotating speed of this turbo heater 9 is detected by a rotating speed sensor 23, while a pressure difference between front and rear of an exhaust turbine 11 is detected by pressure sensors 24, 25. In addition, a temperature difference between front and rear of a blower 12 is detected by temperature sensors 26, 27, while an opening of the exhaust control valve 13 is detected by an opening sensor 28. For instance, any two of these rotating speed, pressure difference, and temperature difference belong to two of the preset abnormal rotating speed versus temperature difference domain, abnormal temperature difference versus pressure difference domain, or abnormal pressure difference versus rotating speed domain, it is judged that one sensor, which is associated with the detection of the two abnormal domains at the same time, is in the trouble.
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Inventors:
Hiroshi Sasaoka
Application Number:
JP26945991A
Publication Date:
July 17, 2000
Filing Date:
October 17, 1991
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
B60H1/18; F01N5/04; H02H5/00; (IPC1-7): B60H1/18; F01N5/04; H02H5/00
Attorney, Agent or Firm:
Aoki Akira (4 outside)