Device for detecting occurrence of misfiring in multicylinder en

Details Device for detecting occurrence of misfiring in multicylinder en Device for detecting occurrence of misfiring in multicylinder en

1992-08-24

1993-09-21

Myracle, Jerry W.

Measuring and testing

Vehicle chassis

Steering

36443107, G01M 1500

Patent

active

052458660

ABSTRACT:
A device for detecting an occurrence of misfiring comprising a crankshaft sensor, which crankshaft sensor is used to detect the elapsed time required for the crankshaft to turn by a predetermined crankshaft angle during combustion in the cylinders. The difference in the elapsed time between cylinders where every other power stroke is performed is found and a determination is made as to at which cylinder the misfiring occurred when the difference exceeds a set value. The difference in elapsed times between cylinders with power strokes of crank angles 360.degree. apart is found and an estimated value of the difference changing due to acceleration or deceleration is found from that difference. This estimated value is used to correct the set value.

REFERENCES:
patent: 5132909 (1992-07-01), Schroeder et al.

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