Internal combustion engine air-fuel ratio control system utilizi

Details Internal combustion engine air-fuel ratio control system utilizi Internal combustion engine air-fuel ratio control system utilizi

1976-02-24

1978-06-27

Cohen, Irwin C.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123140MC, 261 46, 261 50R, 261 69R, F02M 716

Patent

active

040968391

ABSTRACT:
An air-fuel ratio control system for an internal combustion engine utilizes an oxygen sensor to maintain a 14.5/1 air-fuel ratio at a first location in an intake manifold to an engine combustion chamber. A method and apparatus is disclosed for adding fuel and/or air to the air-fuel mixture at a second location, between the first location and the engine combustion chamber, so that the engine operates at a high economy, low emission point when idling, running at a substantially constant speed or decelerating and operates at a low economy point, yet still with low emissions, only when accelerating.

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patent: 3548792 (1970-12-01), Palmer et al.
patent: 3655170 (1972-04-01), Lazar
patent: 3690305 (1972-09-01), Shimada et al.
patent: 3800766 (1974-04-01), Schubelk
patent: 3825239 (1974-07-01), Rice
patent: 3844304 (1974-10-01), Boothe
patent: 3861366 (1975-01-01), Masaki et al.
patent: 3866583 (1975-02-01), Pundt et al.
patent: 3903214 (1975-09-01), Sigwald

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