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:
Aug. 25, 1992
Filed:
Aug. 30, 1990
Applicant:
Inventors:
Ikuo Matsuda, Hiroshima, JP;
Seiji Tashima, Hiroshima, JP;
Ikuo Onimura, Hiroshima, JP;
Akihiro Nakamoto, Hiroshima, JP;
Assignee:
Mazda Motor Corporation, Hiroshima, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
60612 ; 60602 ;
Abstract
An engine is provided with primary and secondary turbochargers. In a small intake air mass range, only the primary turbocharger is caused to operate, and in a large intake air mass range, both the primary and secondary turbochargers are caused to operate. A waste gate valve and an exhaust bypass valve are controlled so that the supercharging pressure approximates to a target supercharging pressure. The target supercharging pressure in the large intake air mass range is set lower than that in the small intake air mass range.