Crank angle detecting device for a multi-cylinder internal combu

Details Crank angle detecting device for a multi-cylinder internal combu Crank angle detecting device for a multi-cylinder internal combu

1989-03-17

1990-10-09

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123643, F02P 706

Patent

active

049614100

ABSTRACT:
A crank angle detector includes a first generator 2 for sequentially generating a first signal including a plurality of first pulses corresponding to the number of engine cylinders in two crankshaft revolutions, and a second generator 3 for generating a second signal in two revolutions including a plurality of groups of second pulses, each group of second pulses having a condition which corresponds to a specific period of the first signal and which is different from those of the other groups. A cylinder discriminator 4 is connected to the first and second generators for discriminating the operating strokes of the respective cylinders by detecting a specific pulse condition of the second signal which occurs within a specific period of the first signal. In a preferred embodiment, each of the second pulses has a width less than that of each pulse of the first signal, and each group of second pulses has a total sum of rising and falling edges which is different from that of each of the other groups. Preferably, the crank angle signal has a period in which the first signal is alternatively at a low level or at a high level.

REFERENCES:
patent: 4656993 (1987-04-01), Yuzawa et al.
patent: 4766865 (1988-08-01), Hartel
patent: 4827886 (1989-05-01), Maeda

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