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:
Nov. 28, 1989
Filed:
Jul. 26, 1988
Masahiro Mochizuki, Chiryu, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A supercharging pressure control device for an internal combustion engine provided with a supercharger includes a first intake passage interposed between the engine and the supercharger, a second intake passage interposed between a throttle valve and the supercharger, a by-pass passage interposed between first and second passages for by-passing the supercharger, a supercharging pressure control valve interposed between first and second passage for controlling the opening and closing of the by-pass passage and a control valve interposed between the first intake passage and the supercharging pressure control valve for increasing the value of the positive pressure in accordance with the increase of the RPM of the engine and the opening degree of the throttle valve. A three-way electromagnetic valve is interposed between the second intake passage and the control valve for communicating the negative pressure generated in the second intake passage or the atmosphere with the control valve in accordance with the RPM of the opening degree of the throttle valve.