Method of discriminating a stroke of a 4-cycle internal combusti

Details Method of discriminating a stroke of a 4-cycle internal combusti Method of discriminating a stroke of a 4-cycle internal combusti

1987-11-17

1989-09-26

Gruber, Felix D.

Boots, shoes, and leggings

123414, 123419, 123617, 123643, 36443103, F02P 504, F02B 304

Patent

active

048705870

ABSTRACT:
An engine stroke discriminating method and apparatus for a 4-cycle internal combustion engine which discriminates a stroke of the engine with accuracy, the method and apparatus being simple in construction and low in cost. The stroke discriminating method and apparatus is characterized by taking advantage of the fact that the rotational speed of a crankshaft after the top dead center of a cylinder of an engine rises substantially relative to that before the top dead center in a compression stroke of the cylinder but does not rise in an exhaust stroke. The stroke of the engine is thus, discriminated by determining the difference in rotational speed of the crankshaft before and after the top dead center of the cylinder.

REFERENCES:
patent: 4452205 (1984-06-01), Takasu et al.
patent: 4471653 (1984-09-01), Kawamura et al.
patent: 4570594 (1986-02-01), Egami et al.
patent: 4660534 (1987-04-01), Cotignoli
patent: 4765306 (1988-08-01), Scarnera et al.

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