Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1976-10-27
1978-10-31
Burns, Wendell E.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123119D, 173124R, F02B 3300, F02M 700, F02B 7510
Patent
active
041228090
ABSTRACT:
An internal combustion engine is equipped with an air-fuel ratio controlling device which monitors at least one exhaust gas component and adjusts the air-fuel ratio according to detection of the component. It is, however, desirable to operate the device only when the engine is warmed up. Accordingly, a system is provided to prevent control by the device until the engine is warmed up. The system includes thermal switches which monitor intake air temperature and coolant temperature. These switches close at selected temperatures so as to allow the air-fuel ratio device to control the air-fuel ratio. Prior to closing the switches, an enriched air-fuel ratio, necessary for starting and running cold engines, is provided.
REFERENCES:
patent: 3745768 (1973-07-01), Zechnall et al.
patent: 3827237 (1974-08-01), Linder et al.
patent: 3874171 (1975-04-01), Schmidt et al.
patent: 3895611 (1975-07-01), Endo et al.
patent: 3942493 (1976-03-01), Linder et al.
patent: 3949551 (1976-04-01), Eichler et al.
Burns Wendell E.
Nissan Motor Company Limited
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