Method for detecting the load on an internal combustion engine

Details Method for detecting the load on an internal combustion engine Method for detecting the load on an internal combustion engine

1993-11-08

1995-04-25

Chilcot, Jr., Richard E.

Measuring and testing

Test stand

For engine

73115, 123425, G01M 1500

Patent

active

054088704

ABSTRACT:
A method for determining engine load of a spark ignition internal combustion engine. The method includes the steps of charging an ignition transformer to a maximum ignition charge and initiating an ignition discharge between electrodes of the spark plug. The ignition transformer is then charged to a predetermined diagnostic charge which is less than said maximum ignition charge. The diagnostic charge is discharged at a time of the combustion cycle where pressure in the combustion cylinder is dependent on engine load. The duration diagnostic discharge is then monitored and subsequently correlated to engine load. In this manner, the spark plug is used as a feedback element in determining engine load.

REFERENCES:
patent: 4417556 (1983-11-01), Latsch
patent: 4621603 (1986-11-01), Matekunas
patent: 4846129 (1989-07-01), Noble
patent: 5207200 (1993-05-01), Iwata
patent: 5269282 (1993-12-01), Miyata et al.
patent: 5272914 (1993-12-01), Murata et al.

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