Method and apparatus for controlling the operation of an interna

Details Method and apparatus for controlling the operation of an interna Method and apparatus for controlling the operation of an interna

1976-02-19

1977-08-23

Smith, Jerry

Registers

Transfer mechanism

Traveling pawl

123 32EA, G06F 1520, F02D 500

Patent

active

040442365

ABSTRACT:
The operation of an internal combustion engine in the region of its lean-running limit is controlled on the basis of engine roughness as measured by an inductive crankshaft transducer. Its periodic signal gates the counting in a digital down-counter, from a pre-set number, at a frequency proportional to r.p.m. The content of the down counter is counted up or down in a subsequent up-down counter depending on the value of its own most significant bit which indicates the algebraic sign of the phase comparison between the transducer frequency and the r.p.m.-proportional frequency. Two digital integrating stages eliminate effects due to constant engine acceleration. A decoder supplies a control signal to a final control element for fuel, air or exhaust control.

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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