System and method for detecting engine revolution speed, identif

Details System and method for detecting engine revolution speed, identif System and method for detecting engine revolution speed, identif

1989-11-22

1991-09-10

Lall, Parshotam S.

Boots, shoes, and leggings

123406, 123414, 123612, 36443105, G06F 1548, G06F 1550, F02P 500

Patent

active

050479431

ABSTRACT:
A system and a method for detecting an engine revolution speed, identifying engine cylinders, and controlling an engine operation according to the detected engine revolution speed and identified engine cylinders in which a crank angle sensor includes a rotor plate which rotates in synchronization with a rotation of an engine crankshaft, a plurality of first slits whose number corresponds to the number of cylinders and which are mutually arranged at equal intervals along the circumferential direction of the rotor plate, and second slit, both first and second slits being aligned on the same circumferential direction, the sensor outputting a pulse train signal including a first signal corresponding to a first crank angle position before a top dead center in a compression stroke and a second signal corresponding to a second crank angle position after the top dead center in the compression stroke of a first engine cylinder and a microcomputer executes a fuel injection quantity and/or ignition timing control on the basis of the first and second signals derived by the crank angle sensor.

REFERENCES:
patent: 4471653 (1984-09-01), Kawamura et al.
patent: 4495927 (1985-01-01), Yamato
patent: 4519362 (1985-05-01), Arakawa et al.
patent: 4553427 (1985-11-01), Kuraoka et al.
patent: 4747389 (1988-05-01), Yuzawa et al.
patent: 4893244 (1990-01-01), Tang et al.

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