Trouble diagnosis apparatus for an internal combustion engine

Details Trouble diagnosis apparatus for an internal combustion engine Trouble diagnosis apparatus for an internal combustion engine

1991-05-23

1992-06-30

Myracle, Jerry W.

Measuring and testing

Vehicle drive train

Rear end

731173, G01M 1500

Patent

active

051252678

ABSTRACT:
A trouble diagnosis appartus comprises a cylinder internal pressure change detecting circuit to detect a change in the inner pressure of the cylinders of an internal combustion engine, a differentiation circuit to effect differentiation of an output signal outputted from the cylinder internal pressure change detecting circuit and a judging circuit to judge the internal combustion engine being faulty when a change quantity of output signal of the differentiation circuit is a predetermined value or lower.

REFERENCES:
patent: 4936137 (1990-06-01), Iwata et al.

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