Measuring and testing – Simulating operating condition – Marine
Patent
1995-05-26
1996-08-20
Chilcot, Richard
Measuring and testing
Simulating operating condition
Marine
73116, 731173, G01M 1500
Patent
active
055467954
ABSTRACT:
In a method and apparatus for diagnosing a trouble in supercharging pressure defecting means in an internal combustion engine which is provided with a throttle valve at the downstream side of a compressor of a supercharger and a means for detecting a supercharging pressure, the trouble of the supercharging pressure detecting means is diagnosed based on the variation in the detecting value of the supercharging pressure upon at the transient operation of the engine, or by comparing the flow rate of an intake air detected at the upstream side of the compressor, the flow rate of an intake air calculated based on the variation in the supercharging pressure during the transient operation of the engine, and the detecting values of the flow rate of an intake air.
Thus, the trouble of the supercharging pressure detecting means can be diagnosed based on the detecting values during the transient operation of the engine only with a software processing and without setting a particular diagnosis period.
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Chilcot Richard
Dombroske George M.
Unisia Jecs Corporation
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