Crank angle sensing system

Details Crank angle sensing system Crank angle sensing system

1995-07-10

1997-03-18

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

731173, 123494, F02P 515, F02P 706

Patent

active

056113110

ABSTRACT:
In order to improve the accuracy in detection of a crank angle position of an internal combustion engine, the crank angle position obtained from signals from a crank angle sensor is corrected by using a cylinder pressure inside an engine cylinder sensed by a cylinder pressure sensor. While the engine is in a predetermined non-firing condition, a control unit determines a crank angular distance (A at steps S1.about.S12) from a reference crank angle position at which the crank angle sensor produces a reference angle signal (REF), to a top dead center indicative position at which the sensed cylinder pressure becomes maximum. The control unit calculates a deviation (.DELTA.REF) of the determined crank angular distance (A) from a predetermined reference angular distance (70.degree., for example), corresponding to a deviation of the mounting position of the crank angle sensor. Then, the control unit determines a corrected crank angle position (CAA) by using the thus-obtained angular deviation (.DELTA.REF).

REFERENCES:
patent: 4744243 (1988-05-01), Tanaka
patent: 5284114 (1994-02-01), Fukui

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