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:
May. 20, 1980
Filed:
May. 19, 1978
Nippon Soken, Inc., Nishio, JP;
Abstract
A supercharged internal combustion engine has a turbo supercharger mounted on an exhaust pipe so that a turbine of the supercharger is driven by engine exhaust gases to drive a blower for the compression of engine intake air. A bypass exhaust pipe is connected to the exhaust pipe at a point upstream of the supercharger and extends in bypassing relationship to the supercharger. A valve is provided in the exhaust system at the above-mentioned point to control the exhaust gas flow into and through the exhaust pipe and the bypass exhaust pipe, respectively. A valve actuator is responsive to variation in the intake pressure in the engine intake system downstream of a throttle valve to actuate the valve such that, when the intake pressure is not greater than a first predetermined value, the valve is actuated to fully close the exhaust pipe and, when the intake pressure becomes greater than a second predetermined value, the valve is actuated to fully close the bypass pipe, whereby the supercharger is operated only in a throttle full-open engine operating range and the supercharging air pressure is kept below a predetermined pressure level to prevent not only the supercharger but also the engine intake and exhaust systems from being continuously subjected to loads.