System for detecting an engine speed in a multi-cylinder interna

Details System for detecting an engine speed in a multi-cylinder interna System for detecting an engine speed in a multi-cylinder interna

1985-12-04

1988-10-18

Lall, Parshotam S.

Boots, shoes, and leggings

73116, 123414, 123418, 36443107, G01P 344

Patent

active

047792140

ABSTRACT:
A system for detecting engine speed in a multicylinder internal combustion engine provided with at least two sets of camshafts which are adapted for separate operation of valves connected to the sets of camshafts. The time detected is that for allowing one of the camshafts to rotate for an angle which is equal to or substantially equal to (720/N).times.n, where N is the number of cylinders and n is the number of sets of camshafts. The engine speed is calculated from the detected time. When the engine is in a predetermined state, such as an acceleration condition, the time is that for allowing the camshaft to rotate for an angle equal to or substantially equal to 720/N.

REFERENCES:
patent: 4156411 (1979-05-01), Crall et al.
patent: 4338813 (1982-07-01), Hunninghaus et al.
patent: 4338903 (1982-07-01), Bolinger
patent: 4417469 (1983-11-01), Stevenson et al.
patent: 4421074 (1983-12-01), Garcea et al.
patent: 4447880 (1984-05-01), Kasai et al.

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