Title:
DETECTOR FOR MISFIRE CYLINDER OF MULTI-CYLINDRICAL INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JPH0534243
Kind Code:
A
Abstract:
PURPOSE: To securely detect that misfire has occurred in any cylinder.
CONSTITUTION: Elapsed time T required for a crank shaft to rotate by a constant crank angle at the time of combustion of each cylinder is detected. Deviation ΔTn (=Tn-Tn-1) of elapsed time between cylinders where explosion cycles are adjacent to each other or deviation ΔTn' (=Tn-Tn-2) between cylinders where explosion cycles occur with one interval interposed is obtained. When the deviation ΔTn or ΔTn' exceeds a set value K or K' continuously twice, misfire is determined to have occurred in either cylinder.
Inventors:
HASHIGUCHI YUKIHIDE
KOBAYASHI NOBUYUKI
KOBAYASHI NOBUYUKI
Application Number:
JP19009091A
Publication Date:
February 09, 1993
Filing Date:
July 30, 1991
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F02B77/08; F02D45/00; F02P17/00; F02P17/12; G01M15/00; G01M15/04; (IPC1-7): F02B77/08; F02D45/00; F02P17/00; G01M15/00
Attorney, Agent or Firm:
Aoki Akira (4 outside)