Cooling device for an internal combustion engine and method for

Details Cooling device for an internal combustion engine and method for Cooling device for an internal combustion engine and method for

1988-02-11

1990-09-11

Ford, John

Heat exchange

Regenerator

Checker brick structure

165 39, 165 40, 123 4112, 123 4144, 123 4149, 236 35, 236 76, 236 99E, 388822, 388908, 388934, F01P 704, G05D 2302, G05D 2324

Patent

active

049554310

ABSTRACT:
A device and method for cooling an internal combustion engine is disclosed in which a simple control circuit constructed of relatively inexpensive components enables the rotational speed of an electric motor employed in the cooling device to be controlled in adaptation to various temperature levels of a cooling circuit. The control circuit includes a power semiconductor which is used to drive the electric motor in certain speed ranges associated with predetermined temperature levels. The control circuit also incorporates a bypass circuit that permits the electrical motor to be driven in particular speed ranges without the use of the power semiconductor. Thus, the electric motor can be driven at one hundred percent of its speed capacity by eliminating a voltage drop associated with the power semiconductor.

REFERENCES:
patent: 1900586 (1933-03-01), Rippe
patent: 1912154 (1933-05-01), Morrison
patent: 2081879 (1982-02-01), Ohashi
patent: 3777234 (1973-12-01), Luger
patent: 4083332 (1978-04-01), Neveux
patent: 4313402 (1982-02-01), Lehnhoff et al.
patent: 4691668 (1987-09-01), West
patent: 4712030 (1987-12-01), Lakin et al.
"Linear Amplifiers--Operation and Application of Operational Amplifiers and Other Linear Circuits" by Dr. Ing. Gerd Harms, 1978.

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