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. 12, 1991
Filed:
Oct. 02, 1989
Shinobu Ishiyama, Numazu, JP;
Teruo Kumai, Gotenba, JP;
Kazuyoshi Ishisaka, Susono, JP;
Toshiyuki Maehara, Susono, JP;
Makoto Fujimori, Obu, JP;
Kimio Nemoto, Obu, JP;
Toyota Jidosha Kabushiki Kaisha, both of, JP;
Aisen Industry Co., Ltd., both of, JP;
Abstract
In a sequential turbocharger system having a first stage large volume turbo-charger and a second stage small volume turbocharger, a diaphragm actuator is provided for an exhaust bypass valve bypassing a turbine of the small volume turbocharger. The diaphragm actuator has a two step characteristic in relation to an opening of the exhaust bypass valve, so that an increased speed of opening of the exhaust bypass valve is obtained when the pressure downstream of the compressor of the first turbocharger is equal to the pressure downstream of the compressor of the second turbocharger.