Internal-combustion engines – Cooling – Interrelated coolant flow and throttle control
Patent
1988-10-14
1990-06-05
Kamen, Noah P.
Internal-combustion engines
Cooling
Interrelated coolant flow and throttle control
123 4102, 25112911, F01P 714
Patent
active
049304550
ABSTRACT:
A motorized water valve of the butterfly-type having the motor case and gear reduction housing formed integrally with the valving chamber. The metal butterfly has elastomeric material formed thereover to provide improved sealing and prevent leakage when the valve is closed thereby enabling substantially shortened warm-up in thermostat application. The control system employs the valve at the engine block outlet to control coolant flow to the radiator in response to an electrical control signal based upon comparison of the sensed block temperature with a desired engine temperature. The control system also employs the valve to control coolant flow to the heater core in response to an electrical control signal based upon a comparison of sensed in-car temperature and a desired in-car temperature selectd by the driver. Heater core discharge air may also be sensed and included in the comparison to provide a control signal to permit automatic in-car temperature regulation. An additional control signal also be generated from the comparison to control heater blower speed control. The control system, upon cold engine starts, opens the radiator coolant valve fully for a short time to allow full flow to clean the valve and remove deposits, then returns to the closed position to continue engine warm-up. The control system may also employ an outside air temperature transducer to provide a signal used in the comparison to enable automatic regulation of desired engine coolant temperature.
REFERENCES:
patent: 2059687 (1936-11-01), Gagg
patent: 4058255 (1977-11-01), Linder et al.
patent: 4176823 (1979-12-01), Gliatas
patent: 4181288 (1980-01-01), Bylsma
patent: 4475485 (1984-10-01), Sakakibara et al.
Bradshaw Cyril E.
Creed Brian T.
Eaton Corporation
Johnston R. A.
Kamen Noah P.
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