Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-01-05
1978-10-31
Burns, Wendell E.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
F02M 2506
Patent
active
041228120
ABSTRACT:
Disclosed is an exhaust gas recirculation apparatus for an internal combustion engine, by which the exhaust gas from a vacuum operated flow control valve connected to the exhaust system of the engine is recirculated into the intake system of the engine at a position located upstream of the throttle valve or at a position located downstream of the throttle valve in accordance with engine operating conditions. The exhaust gas is recirculated at the position downstream of the throttle valve when the engine is operating under a low rotational speed condition, while the exhaust gas is recirculated at the position upstream of the throttle valve when the engine is operating under a high rotational speed condition. A sufficient amount of exhaust gas can be recirculated during all engine operating conditions.
REFERENCES:
patent: 3882837 (1975-05-01), Horie et al.
patent: 3906909 (1975-09-01), Garcea
patent: 3908618 (1975-09-01), Tange et al.
patent: 4024847 (1977-05-01), Koganemaru
patent: 4048967 (1977-09-01), Stumpp
patent: 4061119 (1977-12-01), Takeshita
Burns Wendell E.
Toyota Jidosha Kogyo Kabushiki Kaisha
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