Internal combustion engine control system

Details Internal combustion engine control system Internal combustion engine control system

1989-03-30

1989-12-12

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Auxiliary air or oxygen added to combustible mixture

261 47, 261 56, 261 68, 261 74, F02D 908

Patent

active

048860344

ABSTRACT:
An internal combustion engine is provided with a biased by-pass throttle valve that trims the flow of supplementary combustion air for mixing with basic combustion air and fuel induced in carburetor venturi. The by-pass throttle valve is controlled by an electrical stepmotor that is regulated by a pre-programmed microprocessor in response to sensed engine speed and engine manifold pressure conditions to thereby improve engine operating efficiency and reduce noxious emissions without utilizing catalytic converter equipment.

REFERENCES:
patent: 3608872 (1971-09-01), Vozumi et al.
patent: 4446834 (1984-05-01), Yoneda et al.
patent: 4491109 (1985-01-01), Kishi et al.
patent: 4700676 (1987-10-01), Harashima et al.

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