Ignition range detector for internal combustion engines

Details Ignition range detector for internal combustion engines Ignition range detector for internal combustion engines

1982-01-05

1984-03-27

Myracle, Jerry W.

Measuring and testing

Vehicle chassis

Steering

G01M 1500

Patent

active

044386478

ABSTRACT:
An ignition range detector for an internal combustion engine is disclosed, in which at each combustion of the internal combustion engine, a pressure signal of a pressure sensor for detecting the pressure in a cylinder is integrated by a signal associated with the crank angle to produce an area S.sub.1 +S.sub.2 presenting the combustion state. At the same time, the pressure signal for a hypothetical case of misfire under the same condition is integrated to produce an area S.sub.1. It is decided whether the ratio (S.sub.1 +S.sub.2)/S.sub.1 is higher than a predetermined value .alpha. or not thereby to detect an ignition range always stably regardless of the operating conditions of the internal combustion engine including the load thereon.

REFERENCES:
patent: 3364735 (1968-01-01), Germann
patent: 4252013 (1981-02-01), Hyanova et al.

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