Internal-combustion engines – Cooling – Automatic coolant flow control
Patent
1994-10-04
1996-04-09
Kamen, Noah P.
Internal-combustion engines
Cooling
Automatic coolant flow control
123 4101, 123 4131, F01P 702
Patent
active
055051650
ABSTRACT:
A controller for an automotive engine sets an activation time T when the key switch of the vehicle is turned on, and controls the radiator fan 8 and the fuel pump 10 for the set activation time after the key switch is turned off, such that the temperature rise of the fuel within the injectors and the generation of vapor therein at the restart of the engine is prevented. The activation time T is set at a predetermined positive value when the coolant water temperature is higher than a predetermined level, and at 0 otherwise (FIG. 2). Alternatively, the activation time T may be set at a value which depends on the sensed coolant water temperature (FIG. 3). Still alternatively, after the key switch is turned off, the radiator fan 8 and the fuel pump 10 may be controlled until the measured coolant water temperature falls below a predetermined level (FIG. 4).
REFERENCES:
patent: 4098236 (1978-07-01), Okawa
patent: 4168456 (1979-09-01), Isobe
patent: 4327674 (1982-05-01), Takei
patent: 4411239 (1983-10-01), Kelch
patent: 4774910 (1988-10-01), Aihara et al.
patent: 5144916 (1992-09-01), Yoshida et al.
Kamen Noah P.
Mitsubishi Denki & Kabushiki Kaisha
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