Apparatus for processing engine operation detection signals

Details Apparatus for processing engine operation detection signals Apparatus for processing engine operation detection signals

1986-04-23

1989-01-24

Gruber, Felix D.

Boots, shoes, and leggings

36443105, 36443108, 123480, 123417, 123428, F02P 900, F02D 4130

Patent

active

048004995

ABSTRACT:
A rotation signal Ne is generated for every 1.degree. of rotation of the engine crankshaft together with a crankshaft angle signal G for every 360.degree. of crankshaft rotation. In response to each rotation signal Ne, a pseudo random number generator generates random number data which is converted to analog data by a D/A converter and supplied to a comparator circuit. An intake air pressure detection data Pim is also supplied to the comparator circuit and the two signals are compared. When the detection data Pim is larger than the converted analog data, the comparator output level is high. The output from the comparator is read for every rotation signal Ne and, when the detection data is larger than the analog data from the D/A converter, a counter is incremented. The count value is read for every generation of the crankshaft signal G and is supplied to the engine control unit as the intake air pressure detection data. The counter is then reset to the initial count value.

REFERENCES:
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patent: 4262526 (1981-04-01), Makita et al.
patent: 4347571 (1982-08-01), Leung et al.
patent: 4509488 (1985-04-01), Forster et al.
patent: 4635214 (1987-01-01), Rasai et al.
patent: 4650020 (1987-03-01), Mizuno et al.
patent: 4690123 (1987-09-01), Kimura et al.

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