Intake air control system for an automotive engine
This patent describes a system for controlling intake air in an automotive engine having an intake passage through which an air-fuel mixture passes, a throttle valve in the intake passage, and a bypass bypassing the throttle valve. The system is comprised of the following means: a control valve provided in the bypass to control the amount of bypassing air; actuating means for operating the control valve; first means for detecting a maximum opening of the throttle valve during a period from opening to closing of the throttle valve and for producing a first throttle position signal dependent on the value of the maximum opening of the throttle valve. It produces a second throttle position signal when the throttle valve is closed to an idle position, respectively; the first means responsive to the first throttle position signal determines an opening degree of the control valve in dependency on the value of the maximum opening of the throttle valve.
- Assignee:
- Fuji Jukogyo Kabushiki Kaisha, Tokyo
- Patent Number(s):
- US 4672935
- OSTI ID:
- 6299257
- Country of Publication:
- United States
- Language:
- English
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