초록 ▼

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

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.

대표청구항 ▼

A cooling air control system for motor vehicles of the type having cooling air duct means opening to an engine copartment, comprising: controllable cooling airflap means for controlling the size of the flow opening in the cooling air duct means; controllable speed fan means for controlling the flow

A cooling air control system for motor vehicles of the type having cooling air duct means opening to an engine copartment, comprising: controllable cooling airflap means for controlling the size of the flow opening in the cooling air duct means; controllable speed fan means for controlling the flow of air supplied by the cooling air duct means; electric motor driven airflap control means for controlling the airflap means in response to detected cooling air requirements to selectively move the same; to a closed position, a partially open position or a fully open position; and rotational speed control means for controlling the rotational speed of the fan means in response to detected cooling air requirements starting in the partially open position of said airflap means.