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. 04, 1984
Filed:
Jun. 14, 1982
Satoshi Suzuki, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A turbocharger control system has a waste gate operative to cause engine exhaust gases to bypass the turbocharger to protect the engine when the supercharging pressure exceeds a predetermined pressure level. A pressure modulator is provided to mix pressures derived from points upstream and downstream of a compressor to produce a controlling pressure which is modulated to be of a pressure level between the compressor-upstream and downstream pressures and which is also adjusted as a function of the atmospheric pressure. A waste gate actuator compares the supercharging pressure and the controlling pressure to control the operation of the waste gate. When a motor vehicle equipped with the system is operated at high altitude where the atmospheric pressure is lower than that obtained at a low altitude, the controlling pressure is adjusted to be substantially the same as the controlling pressure obtained at the low altitude, whereby the waste gate is opened only at a predetermined pressure level of the supercharging pressure to assure a good engine operability.