Measuring and testing – Simulating operating condition – Marine
Patent
1996-09-18
1997-12-16
Chilcot, Richard
Measuring and testing
Simulating operating condition
Marine
G01M 1900, G01P 500
Patent
active
056987803
ABSTRACT:
An apparatus for detecting a malfunction in an intake pressure sensor of an engine includes a first detecting unit which detects a flow rate of intake air of the engine. A second detecting unit detects an engine speed of the engine. An intake pressure estimating unit determines an intake-air specific flow rate from the intake-air flow rate and the engine speed and determines characteristic values for the intake-air specific flow rate, the characteristic values being representative of an allowable range of intake pressure of the engine for the intake-air specific flow rate. A malfunction determining unit detects whether a malfunction in the intake pressure sensor has occurred, by comparing a signal output by the intake pressure sensor with the characteristic values determined by the intake pressure estimating unit.
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patent: 5003950 (1991-04-01), Kato et al.
patent: 5029569 (1991-07-01), Cullen et al.
patent: 5136517 (1992-08-01), Cullen et al.
patent: 5546795 (1996-08-01), Yamagishi
Ikari Keisuke
Mizutani Koichi
Chilcot Richard
Oen William L.
Toyota Jidosha & Kabushiki Kaisha
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