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:
Apr. 20, 1993
Filed:
Jan. 25, 1991
Tsuyoshi Goto, Hiroshima, JP;
Kouichi Hatamura, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
An intake system has an intake passage provided with a throttle valve and a supercharger for delivering a supercharger pressure to intake air engine cylinders. A bypass passage is connected to the intake passage so as to allow an intake air flow to bypass the supercharger. The intake air flow in the bypass passage is controlled by a valve, disposed in the bypass passage, which operates to variably cause the intake air to flow in the bypass passage only with a negative pressure created in the intake passage upstream of the supercharger. A pressure is applied to the valve during closing so as to cancel the supercharger pressure acting on the valve in an opening direction.