Hybrid spark advance control apparatus for internal combustion e

Details Hybrid spark advance control apparatus for internal combustion e Hybrid spark advance control apparatus for internal combustion e

1976-10-19

1979-03-06

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123117A, F02P 504

Patent

active

041424905

ABSTRACT:
The spark advance control apparatus of the invention comprises a vacuum advance control mechanism and a speed advance control circuit. The vacuum advance control mechanism senses the vacuum pressure in the intake manifold of an internal combustion engine and generates an electrical pulse in advanced timing in relation to the sensed vacuum. The speed advance control circuit receives the pulse from the vacuum advance control mechanism, converts it into a voltage signal representative of the revolution of the engine crankshaft and generates an output voltage which varies nonlinearly as a function of the voltage signal. A pulse-width generator is provided having a first input connected to receive the pulse from the vacuum advance control mechanism and a second input connected to receive the nonlinear speed related voltage signal to generate a pulse which commences in response to the vacuum advance pulse and ends at a time determined by the speed related voltage signal. The trailing edge of the output from the pulse-width converter is utilized for ignition.

REFERENCES:
patent: 1882720 (1932-10-01), Arthur
patent: 3145324 (1964-08-01), Race
patent: 3575150 (1971-04-01), Habert
patent: 3874351 (1975-04-01), Asler et al.
patent: 3885534 (1975-05-01), Webster
patent: 3910243 (1975-10-01), Gau et al.
patent: 3916855 (1975-11-01), Fauser et al.
patent: 3923029 (1975-12-01), Polo
patent: 3943896 (1976-03-01), Green et al.
patent: 4057045 (1977-11-01), Stellwagen
S.E.V. Marchal Technical Document, "GT Distributor With Magnetic Timer", 9/75.

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