Coolant temperature control system for an internal-combustion en

Details Coolant temperature control system for an internal-combustion en Coolant temperature control system for an internal-combustion en

1996-06-07

1997-12-02

Kamen, Noah P.

Internal-combustion engines

Cooling

Interrelated coolant flow and throttle control

123 4115, F01P 714

Patent

active

056924607

ABSTRACT:
A coolant temperature control system for an internal-combustion engine in a motor vehicle having an electrically heatable thermostatic valve whose method of operation can be shifted by electrical heating in the radiator operation direction. Control devices are provided for recognizing a defect of another system in the motor vehicle which controls the coolant flow. When a defect of this other system is recognized, the thermostatic valve is heated. Particularly when a defect is recognized, the heating of the thermostatic valve is controlled such that the coolant temperature is maintained below a preset coolant temperature threshold. Preferably, the recognition of a defect is carried out by means logically monitoring output signals of the other system.

REFERENCES:
patent: 4672920 (1987-06-01), Duprez
patent: 5477816 (1995-12-01), Ranzinger et al.
VDI-Berichte (VDI-Reports), No. 515, 1984, pp. 161-165.

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