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:
Sep. 08, 1992
Filed:
Jan. 22, 1991
Toyota Jidosha Kabushiki Kaisha, Tokyo, JP;
Abstract
An internal combustion engine with a dual turbocharger system which includes an engine, a first and a second turbocharger arranged in parallel with each other, an intake switching valve located downstream of a compressor of the second turbocharger, an exhaust switching valve located downstream of a turbine of the second turbocharger, and an exhaust bypass valve installed an exhaust bypass conduit bypassing the exhaust switching valve. The exhaust bypass valve is opened on the basis of a charging pressure at low engine speeds and is opened on the basis of an intake air quantity at high engine speeds. As a result of controlling the exhaust bypass valve in this fashion, a smooth transition from a 'one-turbocharger-operation' to a 'two-turbocharger-operation' can be obtained throughout the entire range of engine speeds.