Process and system for detecting misfiring in internal combustio

Details Process and system for detecting misfiring in internal combustio Process and system for detecting misfiring in internal combustio

1994-08-03

1996-05-07

Teska, Kevin J.

Boots, shoes, and leggings

731173, 123419, G01M 1500

Patent

active

055152813

ABSTRACT:
Starting from a sequence of values of indicated torque detected for each expected combustion in the engine a cycle signal is generated as a combination of at least two successive values of the said sequence. The peak value of the said cycle signal is then compared with a comparison threshold chosen preferably in proportion of the fuel injection duration into the cylinders. Misfires are identified preferably from the result of a comparison between the said peak value and the said comparison threshold which differs from the result of comparison in the presence of regular operation of the engine.

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Patent Abstracts of Japan, vol. 7, No. 254 (M-255) (1399) Nov. 11, 1983 & JP-A-58 138 271 (Mitsubishi Jidosha Kogyo KK) Aug. 17, 1983.
Klenk, et al., "Misfire Detection by Evaluating Crankshaft Speed-A Means to Comply with OBDII", SAE International Congress, Mar. 1-5, 1993, pp. 1-9.

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