Apparatus for detecting an occurence of misfiring in an engine c

Details Apparatus for detecting an occurence of misfiring in an engine c Apparatus for detecting an occurence of misfiring in an engine c

1994-05-16

1997-06-10

Teska, Kevin J.

Boots, shoes, and leggings

36443103, 36443104, 36443107, 731173, 73116, 123436, 123419, G06G 770

Patent

active

056382782

ABSTRACT:
In a misfire detecting device for an internal combustion engine having a plurality of cylinders, revolution detecting device detects the revolution of an engine; arithmetic device calculates deflections in revolution of the engine for each of the cylinders on the basis of a period of revolution of the engine in correspondence to the order of combustion of the cylinders; threshold value determining device determines a misfire decision threshold value for the cylinders from a value obtained by smoothing arithmetic values which are determined for the cylinders by the arithmetic device, and a predetermined value; and misfire deciding device compares the arithmetic values provided by the arithmetic device with the threshold value to comparison, to determine the occurrence of a misfire in any one of the cylinders.

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Plapp, Gunther, et al., "Methods of On-Board Misfire Detection," Society of Automotive Engineers, 1990 (SAE-SP-819), pp. 9-20.

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