Airflow control devices based on active materials

Details Airflow control devices based on active materials Airflow control devices based on active materials

2006-06-13

2006-06-13

Patel, Kiran B. (Department: 3612)

Land vehicles: bodies and tops

Bodies

With distinct wind deflector

C244S201000, C244S204100

Reexamination Certificate

active

07059664

ABSTRACT:
An airflow control device comprises a body and an active material in operative communication with the body. The active material, such as a shape memory material, is operative to change at least one attribute in response to an activation signal. The active material can change its shape, dimensions and/or stiffness producing a change in at least one feature of the airflow control device such as shape, dimension, location, orientation, and/or stiffness to control vehicle airflow to better suit changes in driving conditions such as the need for increased airflow through the radiator due to increases in engine coolant temperature. As such, the device improves vehicle fuel economy while maintaining proper engine cooling. An activation device, controller and sensors may be employed to further control the change in at least one feature of the airflow control device such as shape, dimension, location, orientation, and/or stiffness of the device. A method for controlling vehicle airflow selectively introduces an activation signal to initiate a change of at least one feature of the device that can be reversed upon discontinuation of the activation signal.

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