Internal combustion engine control apparatus

Details Internal combustion engine control apparatus Internal combustion engine control apparatus

1996-02-21

1997-07-15

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123476, 123479, F02D 4122, F02D 4126, F02P 515, F02P 7067

Patent

active

056473222

ABSTRACT:
A control apparatus for an internal combustion engine capable of performing engine cylinder identification while ensuring a backup control upon occurrence of abnormality includes a first detector 81 for generating a first signal series REFC synchronously with rotation of a crank shaft 11, a second detector 82 for generating a second signal series POSC synchronously with rotation of a cam shaft 1, and a microcomputer 100 for controlling a parameter P for the engine from the first or second signal series. The first signal series REFC contains reference position pulses indicative of reference positions .theta.R for cylinders. One of the pulses corresponding to a given cylinder group (#1, #4) has a shape PW1 differing from that for the other group (#2, #3). The second signal series contains angular position pulses generated at every predetermined position of the cam shaft and a cylinder identifying signal .tau. corresponding to cylinder (#1). The microcomputer detects a reference position .theta.R based on the first signal series, identifies the cylinder groups based on the second signal series, determines a timing for controlling the parameter P based on the results of the identifications obtained, and outputs an abnormality decision signal upon detecting abnormality in the first or second signal series.

REFERENCES:
patent: 5156125 (1992-10-01), Fukui et al.
patent: 5329904 (1994-07-01), Kokubo et al.
patent: 5343842 (1994-09-01), Fukui
patent: 5460134 (1995-10-01), Ott et al.

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