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:
Mar. 04, 2003
Filed:
Oct. 22, 2001
Ulrich Augustin, Blythewood, SC (US);
Siemens Diesel Systems Technology, LLC, Blythewood, SC (US);
Abstract
An oil activated fuel injector which includes a control valve having a groove which provides a fluid path between a bore and a cross bore of the valve body. The fluid path leads to ambient such that a pressure within a pressure chamber is less than that of the rail pressure. This equalized pressure allows the spool within the valve body to move to a first position thus forming a fluid path between an inlet port and the working port leading to the intensifier chamber. When the fluid path is blocked, via movement of the groove out of alignment with the cross bar, the pressure within the pressure chamber increases thereby forcing the spool to move towards a second position. In the second position, a space is formed between the spool and the body of the injector to provide venting of the working fluid from the intensifier chamber to ambient.