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:
Jun. 28, 2005
Filed:
May. 15, 2001
Hidekazu Oshizawa, Higashimatsuyama, JP;
Yoriyuki Takekawa, Higashimatsuyama, JP;
Hidekazu Oshizawa, Higashimatsuyama, JP;
Yoriyuki Takekawa, Higashimatsuyama, JP;
Abstract
A check valve () and a booster () are inserted in parallel in a supplied fuel line () connecting a common rail () and an injection valve (), a piston (E) of a hydraulic circuit () is driven for positioning by a piezoelectric actuator (PA-), the pressures in a chamber (Db) of the booster () and the pressure in a fuel chamber (G) of the injection valve () are selectively lowered by controlling the alignment state between ports (Eb), (Ec) provided in the piston (E) to communicate with a low-pressure portion and an openingAa of a first chamberA and an opening (Ba) of a second chamber (B) of cylinder (C), whereby the pressure of the fuel supplied to the fuel reservoir (B) of the injection valve () is rapidly switched to one or the other of high-pressure fuel from the common rail () and pressure-boosted high-pressure fuel from the booster ().