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:
Jul. 05, 2011
Filed:
Apr. 29, 2008
Andy Male, Walton on Thames, GB;
Jonathan N Wray, Cheltenham, GB;
Anthony Thomas Harcombe, Richmond, GB;
Ricardo Pimenta, Epsom, GB;
Malcolm David Dick Lambert, West Wickham, GB;
Andrew J Limmer, Edmunds, GB;
Andy Male, Walton on Thames, GB;
Jonathan N Wray, Cheltenham, GB;
Anthony Thomas Harcombe, Richmond, GB;
Ricardo Pimenta, Epsom, GB;
Malcolm David Dick Lambert, West Wickham, GB;
Andrew J Limmer, Edmunds, GB;
Delphi Technologies Holding S.arl, Troy, MI (US);
Abstract
A fuel injector comprising a nozzle having a nozzle needle which is moveable with respect to a first needle seat to control fuel delivery through a nozzle outlet. The injector includes a nozzle control valve for controlling fuel flow into a control chamber through a first passage to pressurise the control chamber, and for controlling fuel flow out of said control chamber through said first passage to depressurise the control chamber. Movement of the nozzle needle is controlled by fuel pressure within the control chamber, such that pressurising the control chamber causes the nozzle needle to be urged against the first needle seat to close the nozzle outlet, and depressurising the control chamber causes the nozzle needle to lift from the first needle seat to open the nozzle outlet. The nozzle needle defines, at least in part, a restricted passage through which fuel can flow into the control chamber as the control chamber depressurises. The fuel flow into the control chamber through the restricted passage serves to reduce the rate at which the control chamber depressurises, thereby reducing the rate at which the nozzle needle lifts from the first needle seat to open the nozzle outlet.