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:
Jan. 21, 1992
Filed:
Oct. 24, 1990
Toshihisa Sugiyama, Gotenba, JP;
Mamoru Yoshioka, Susono, JP;
Kunihiko Nakata, Susono, JP;
Takashi Miyake, Aichi, JP;
Toru Kidokoro, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An internal combustion engine with a dual turbocharger system includes a first turbocharger and a second turbocharger arranged in parallel with each other. An exhaust switching valve is installed in an exhaust conduit downstream of a turbine of the second turbocharger and is actuated by a single diaphragm actuator. An exhaust bypass conduit is provided so as to bypass the exhaust switching valve, and an exhaust bypass valve is installed in the exhaust bypass conduit. Before the operation is changed from 'one-turbocharger-operation' to 'two-turbocharger-operation', the exhaust bypass valve is opened before the exhaust switching valve is opened, to suppress a shock which may occur at the transition from the 'one-turbocharger-operation' to 'two-turbocharger-operation'.