Fail-safe coolant thermostat system for an internal combustion e

Details Fail-safe coolant thermostat system for an internal combustion e Fail-safe coolant thermostat system for an internal combustion e

1989-04-06

1990-07-24

Kamen, Noah P.

Internal-combustion engines

Cooling

Interrelated coolant flow and throttle control

123 4115, 25112921, F01P 714

Patent

active

049428497

ABSTRACT:
A system for converting the failure mode of a motor vehicle type thermostat whereby a secondary cooling fluid passage, connected in parallel to the primary (thermostat-controlled) cooling fluid passage, is established. The by-pass valve means of the secondary passage is normally open and is closed only when the motor vehicle ignition is started. If the control for the primary passage malfunctions, a thermocoupler interrupts the circuit that holds said by-pass valve closed, thus allowing cooling fluid to flow through said secondary passage. A means for manually controlling the secondary passage valve is further disclosed.

REFERENCES:
patent: 2013424 (1935-09-01), Rippe
patent: 4399775 (1983-08-01), Tanaka et al.
patent: 4469275 (1984-09-01), DeSalve
patent: 4512546 (1985-04-01), Inada et al.

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