Measuring and testing – Vehicle chassis – Steering
Patent
1993-09-29
1995-09-05
Chilcot, Jr., Richard E.
Measuring and testing
Vehicle chassis
Steering
36443107, G01M 1500
Patent
active
054470617
ABSTRACT:
The present invention relates to a method of accurately detecting misfiring in an engine that is not affected by fluctuations in engine speed caused by factors other than misfiring, and that is also accurate during continuous misfiring. The method identifies the start of misfiring in a cylinder n-1 if a compensated differential rotation DELNA falls in the negative direction to less than or equal to a misfire identification level LVLMIS in a transition from a cylinder n-2 to cylinder n-1, and this condition continues in the subsequent transition from cylinder n-1 to cylinder n. After misfiring has been identified, this method detects that misfiring continues by comparing a compensated differential rotation DELNAn-1 for cylinder n-1 with the sum of the misfire identification level LVLMIS and a minimum value DNEAMS. It identifies that the misfiring has ended when DELNAn-1.gtoreq.DNEAMS+LVLMIS and the fall of the compensated differential rotation DELNAn-1 for cylinder n-1 has recovered to a prescribed level.
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Chilcot Jr. Richard E.
Dombroske George M.
Fuji Jukogyo Kabushiki Kaisha
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