Method and apparatus for determining smooth running operation in

Details Method and apparatus for determining smooth running operation in Method and apparatus for determining smooth running operation in

1976-02-19

1977-08-23

Smith, Jerry

Registers

Transfer mechanism

Traveling pawl

123 32EA, G06F 1520, F02D 500

Patent

active

040442357

ABSTRACT:
Engine control based on the smooth or rough running of the engine is performed by obtaining a signal indicative of crankshaft rotation and by digital measurement of the period of revolution. The periods of three successive revolutions are compared to obtain a second differential, related to acceleration and hence to combustion chamber pressure. This second differential is compared digitally to a nominal value, taken from an rpm-dependent function of the engine smoothness, derived by frequency synthesis of the frequencies from individual stages in one or more of the counters.

REFERENCES:
patent: 3789816 (1974-02-01), Taplin et al.
patent: 3820198 (1974-06-01), Scofield
patent: 3863054 (1975-01-01), Monpetit
patent: 3927304 (1975-12-01), Wentworth et al.
patent: 3953716 (1976-04-01), Monpetit

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