System for controlling cooling water temperature for water-coole

Details System for controlling cooling water temperature for water-coole System for controlling cooling water temperature for water-coole

1982-04-26

1983-07-19

Tapolcai, William E.

Internal-combustion engines

Cooling

Automatic coolant flow control

123 4144, 236 345, F01P 714

Patent

active

043938191

ABSTRACT:
A system for controlling cooling water temperature for an engine has a radiator, a cooling water passage communicating a water jacket in the engine with the radiator, and a thermostat provided in the cooling water passage. The system is provided with a bypass for bypassing the thermostat, a bypass valve provided in the bypass for closing the bypass; and a solenoid operated valve for actuating the bypass valve. Switch circuits are connected parallel to the solenoid operated valve means. The switch circuits comprises a low temperature switch responsive to low cooling water temperature to effect the operation of the solenoid operated valve for closing the bypass valve of the bypass, a high temperature switch responsive to high cooling water temperature to effect the operation of the solenoid operated valve for closing the bypass valve, a light load switch responsive to the light load operation of the engine to effect the operation of said solenoid operation valve for closing the bypass valve, and a heater switch connected to the high temperature switch in series, whereby the cooling water temperature is controlled according to the engine operation and the heater operation.

REFERENCES:
patent: 1500418 (1924-07-01), Page et al.
patent: 2134662 (1938-10-01), Flamm
patent: 3851629 (1974-12-01), Mayr et al.
patent: 3921600 (1975-11-01), Henning et al.
patent: 3939807 (1976-02-01), Eichinger
patent: 4337733 (1982-07-01), Hirata et al.

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