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. 03, 2005
Filed:
Nov. 18, 2003
Tetsuo Tabata, Kanagawa, JP;
Naohito Metoki, Kanagawa, JP;
Takayuki Tazawa, Kanagawa, JP;
Kenji Hagio, Kanagawa, JP;
Tetsuo Tabata, Kanagawa, JP;
Naohito Metoki, Kanagawa, JP;
Takayuki Tazawa, Kanagawa, JP;
Kenji Hagio, Kanagawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
A device for preventing the turbo-charger from over-running, wherein an actuator is arranged in a by-pass bypassing a turbine of the turbo-charger and operates a waste gate valve. The actuator has a positive pressure chamber communicated, via a boost pipe, with an intake air passage downstream of a compressor and a negative pressure chamber communicated with a source of negative pressure via a negative pressure pipe. The negative pressure chamber is so constituted as to be supplied with a negative pressure to have a target pressure that is set relative to the atmospheric pressure.