Cooling air flap and blower control for motor vehicles

Details Cooling air flap and blower control for motor vehicles Cooling air flap and blower control for motor vehicles

1986-12-02

1988-10-25

Koczo, Michael

Internal-combustion engines

Cooling

Automatic coolant flow control

123 4112, 165 98, F01P 702

Patent

active

047795778

ABSTRACT:
To control the cooling air requirements of an internal combustion engine and additional assemblies on a motor vehicle, a combination of cooling air flaps adjustable by an electric motor and a ventilator blower whose rpm is adjustable and which are powered by electric motors is used. One closed, one partially open, and one fully open position of the cooling air flaps as well as the rotational speed of the blower are controlled as a function of the cooling requirements of the internal combustion engine and the states of an air conditioner, a temperature of an automatic transmission fluid, a temperature of an intake manifold of the internal combustion engine, and the position of an ignition switch and an engine hood contact switch in such fashion that a cooling air stream which changes nearly continuously with the cooling requirements is created in the cooling air duct. Advantageously, in addition to the optimum protection of the system and a favorable fuel consumption, a shortened warmup phase of the internal combustion engine and improved aerodynamics of the motor vehicle are achieved by limiting the throughflow of the internal combustion engine chamber with the cooling air flaps closed or partially open.

REFERENCES:
patent: 3377023 (1968-04-01), Costa et al.
patent: 3872842 (1975-03-01), Medley
patent: 3963070 (1976-06-01), Alley et al.
patent: 4124066 (1978-11-01), Taylor
patent: 4133185 (1979-01-01), Dickey
patent: 4186694 (1980-02-01), Koseki
patent: 4410032 (1983-10-01), Mori
patent: 4489680 (1984-12-01), Spokas et al.
patent: 4854459 (1974-12-01), Stimeling
"Automatishe Temperaturregelung in Kuhlkreislaufen von Verbrennungsmotoren", Mtz, 20, vol. 5, May 1969, pp. 137-142.

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