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:
Oct. 16, 1984
Filed:
May. 28, 1981
Satoshi Suzuki, Katsuta, JP;
Hiroyuki Ando, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A system for controlling an exhaust gas-driven supercharger used in an internal combustion engine for an automotive vehicle includes an exhaust gas bypass passage connecting between selected portions of the exhaust gas conduit upstream and downstream of a turbine of the supercharger, and an exhaust bypass valve disposed midway of the exhaust gas bypass passage for controlling the quantity of engine exhaust gases. In the supercharger control system, an actuator responsive to a digital control signal is employed for actuating the exhaust bypass valve. A microcomputer calculates the opening of the exhaust bypass valve so that the supercharged air pressure may not exceed the critical point giving rise to knocking, and such a digital control output signal is applied to energize the actuator so that the supercharged air pressure can be controlled with highest efficiency over a wide operation range of the engine.