Device to reduce the nitrogen oxide content in the exhaust gas o

Details Device to reduce the nitrogen oxide content in the exhaust gas o Device to reduce the nitrogen oxide content in the exhaust gas o

1976-01-09

1977-03-29

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2506

Patent

active

040143023

ABSTRACT:
A system for reducing the nitrogen oxide content of exhaust gas emitted by an internal combustion engine, by introducing exhaust gas from the engine into the fuel mixture being supplied to the engine. A valve that is adjusted by a pressure sensitive actuator responsive to changes in pressure in the engine crankcase proportions the amount of exhaust gas introduced into the fuel mixture to engine speed, and another valve that is controlled by adjustment of the throttle valve prevents introduction of the exhaust gas into the fuel mixture when the engine is idling and when it is operating at high speed and under high loads.

REFERENCES:
patent: 3648672 (1972-03-01), Muruki et al.
patent: 3844261 (1974-10-01), Garcea
patent: 3881456 (1975-05-01), Nohira et al.
patent: 3885538 (1975-05-01), Suter

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