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:
Mar. 20, 1990
Filed:
Feb. 02, 1988
Applicant:
Inventors:
Tomoo Tadokoro, Hiroshima, JP;
Ikuo Matsuda, Hiroshima, JP;
Assignee:
Mazda Motor Corporation, Hiroshima, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
60602 ;
Abstract
A turbo-supercharger for an engine includes a turbine casing formed with two scrolls. A shut-off valve is provided for closing one of the scrolls in a low speed engine operation. The shut-off valve is operated by a pneumatic actuator which is normally biased to force the shut-off valve to the open position. Under a low speed engine operation, the intake suction pressure is applied to the actuator to move the shut-off valve to the closed position.