Patent ID: 7428892

Claim:
An electronically controlled throttle valve system comprising: a throttle valve; an actuator for actuating the throttle valve and which includes a case, a throttle body which houses and supports the throttle valve and the actuator, the case of the actuator and the throttle body being made of mutually different materials; and an elastic body mounted between the case of the actuator and the throttle body; wherein the elastic body includes a contact portion which is in contact with the case of the actuator and another contact portion which is in contact with the throttle body, one of the contact portions is larger in contact area than the other one, and the contact portion having a larger contact area is in contact with one of the case and the throttle body, which is made of a material easy to be deformed, and the other contact portion having a smaller contact area is in contact with the other one of the case and the throttle body, which is made of a material hard to be deformed.