Air-fuel ratio control system utilizing oxygen sensor and pressu

Details Air-fuel ratio control system utilizing oxygen sensor and pressu Air-fuel ratio control system utilizing oxygen sensor and pressu

1976-02-24

1977-10-11

Lazarus, Ronald H.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

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

Patent

active

040529703

ABSTRACT:
An air-fuel ratio control system for an internal combustion engine includes an air intake connected to a burning chamber having an oxygen sensor and an intake manifold to an engine combustion chamber. Fuel is mixed with air in both the air intake and the intake manifold. The oxygen sensor maintains a 14.5/1 air-fuel ratio in the mixture in the air intake, and a pressure differential sensor equalizes the pressures in the air intake and the intake manifold. The rate of flow of fuel into the intake manifold is varied 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.

REFERENCES:
patent: 2656824 (1953-10-01), Devaux
patent: 3713630 (1973-01-01), Laprade et al.
patent: 3738341 (1973-06-01), Loos
patent: 3825239 (1974-07-01), Rice
patent: 3844304 (1974-10-01), Boothe
patent: 3890946 (1975-06-01), Wahl

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