The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 16, 1988
Filed:
Dec. 23, 1985
Kenichi Sasaki, Yokohama, JP;
Yoshio Iwasa, Nagareyama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A supercharge pressure control apparatus having a plurality of detectors, a control valve for controlling the exhaust gas flow flowing into an exhaust gas turbine, first and second electromagnetic valves for selectively controlling the control valve in response to control signals, and an electronic control unit for controlling the first and second electromagnetic valves in accordance with operating conditions of the engine. The opening of the control valve is compulsorily opened to a predetermined opened condition when the vehicle is in the idling condition or it is running at low speed below a preset vehicle speed through the second electromagnetic valve, while maintaining supercharge pressure control by the control valve through the first electromagnetic valve when the actual vehicle speed is above the preset vehicle speed. Excessive increase in engine speed during no load conditions or an idling condition of the engine can be prevented, while a sufficient output power can be obtained at the initial period of a suddenly accelerated condition of the vehicle without excessive reduction of the exhaust gas flow rate.