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:
Jan. 03, 1995
Filed:
Nov. 01, 1993
Corrine A Volo, Webster, NY (US);
Jeffrey A Rock, West Henrietta, NY (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A fuel injection nozzle has a valve seat assembly with an upstream and a downstream seat interconnected by a longitudinally extending passage and by a bypass extending from a location upstream of the first seat to a chamber located intermediate of the two seats. A popper valve assembly has upstream and downstream valve members interconnected by a spacer member disposed within the chamber and operable relative to respective valve seats to regulate flow through the nozzle. A biasing member urges the valve member into a normally closed position in which the upstream valve member is unseated and the downstream member is seated to interrupt flow therethrough and out of the nozzle. Introduction of a fuel pulse into the nozzle moves the upstream valve member into engagement with its valve seat to thereby unseat the downstream valve member from its valve seat to allow fuel flow through the bypass around the upstream valve/seat wherein the fuel is discharged into the chamber intermediate of the two valve members. The fuel undergoes a pressure drop upon its exit from the bypass and is subject to movement about the chamber and the spacer member to optimize the atomization of the fuel as it exits the nozzle through the open, downstream valve/seat.