Title:
【発明の名称】自動車用触媒温度警報装置
Document Type and Number:
Japanese Patent JPS5928729
Kind Code:
B2
Abstract:
PURPOSE:To enable to detect extraordinary temperature rise of catalyst with high reliability, by detecting the temperature of catalyst through detection of infrared rays radiated from around a catalytic converter disposed in the exhaust system, and producing an alarm when the temperature of catalyst is raised extraordinarily. CONSTITUTION:In an engine 1 having a catalyst 3 in the exhaust manifold 2, an infrared-ray detector 5 is attached, by the intermediary of rubber, to the cylinder block of the engine 1 facing the catalyst 3. When the temperature of catalyst 3 is raised during operation of engine 1, the temperature of exhaust gas passed through the catalyst 3 is also raised and infrared rays are radiated from the surface of datalyst 3. The infrared rays thus radiated from the surface of catalyst 3 are detected by the detector 5 and the output of the detector 5 is given to a comparator 7 via an amplifier 6. Here, if it is judged by the comparator 7 that the temperature of catalyst 3 is raised extraordinarily, an alarm lamp 9 on the instrument board in the operator's cabin is lighted by an alarm lamp driving circuit 8.
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Inventors:
NAKAJIMA YASUO
Application Number:
JP16987079A
Publication Date:
July 16, 1984
Filing Date:
December 26, 1979
Export Citation:
Assignee:
NISSAN MOTOR
International Classes:
F01N3/20; F01N11/00; F01P11/16; F02D35/00; (IPC1-7): F01N3/20; F02B77/08
Attorney, Agent or Firm:
Kiyose Saburo