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:
Oct. 21, 1997
Filed:
Oct. 17, 1995
Kazuyuki Kogiso, Fujisawa, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A system for reducing a driving torque of an engine employs a diaphragm type actuator for actuating a second throttle valve disposed in an intake passage of the engine in series to an accelerator-operated ordinary throttle valve in order to provide a simplified construction. A three way solenoid valve is arranged to selectively introduce a negative pressure such as an intake manifold vacuum, or atmospheric pressure into a working chamber of the diaphragm type actuator. By being supplied with the negative pressure or the atmospheric pressure, the diaphragm type actuator puts the second throttle valve either in a fully open position or in a closed position of about 1/8 opening degree. An orifice or some other flow resisting means is provided to make an opening movement slower than a closing movement of the second throttle valve.