Shaft position sensor for an internal combustion engine equipped

Details Shaft position sensor for an internal combustion engine equipped Shaft position sensor for an internal combustion engine equipped

1980-01-14

1982-02-02

Cox, Ronald B.

Internal-combustion engines

High tension ignition system

Electronic cylinder sequencing

123618, 123414, 123617, 123612, F02P 504, F02P 100

Patent

active

043134149

ABSTRACT:
Electromechanical sensing means comprising first of a set of members all of them substantially identical, arranged on an element turning synchronously with the engine's rotation and, second, of a pair of fixed detectors, placed in a protective casing for the turning element; the set of members including regularly spaced main members, in a number proportional to the number of the engine's cylinders, and at least one auxiliary member displaced at an angle .phi..sub.D at least equal to the lead angle .phi..sub.A to be controlled; the pair of detectors being positioned with regard to the course of the members and the relative angular interval in the two detectors being equal to the angle .phi..sub.D ; and an electronic means for processing the output signals of the detectors; these means being made up of three circuits; a coincidence circuit which combines the output signals of the two detectors and supplies an output signal S0 corresponding to the ignition cycle; a first logic circuit which receives the output signal of detector D1 and the output signal S0 of the coincidence circuit, and supplies an output signal S1 corresponding to the moments of passage of the pistons near the TDC and a second logic circuit which receives the output signal of detector D2 and the output signal S0 of the coincidence circuit and supplies an output signal S2 corresponding to the moments of passage of the pistons at a point anterior to the TDC.

REFERENCES:
patent: 4112895 (1978-09-01), Habert
patent: 4181884 (1980-01-01), Shirasaki

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