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:
Aug. 14, 1979
Filed:
Apr. 06, 1978
John I Deckard, Grand Rapids, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An electromagnetic fuel injector nozzle assembly has a pressure balanced poppet valve controlled discharge outlet supplied with pressurized fuel, with a return spring normally maintaining the poppet valve in a closed position. An actuator cylinder means and plunger is incorporated in the nozzle assembly with the actuator plunger positioned therein to engage the poppet valve to effect outward opening movement thereof and has its end of the actuator cylinder means opposite the poppet valve supplied with pressurized fuel for hydraulic actuation of the plunger, while the opposite end of the actuator cylinder means, the end adjacent to the poppet valve, is supplied with pressurized fuel through a flow control throttling orifice and this end of the actuator cylinder is also connected via a modulated pressure passage, having a normally closed solenoid valve therein for controlling flow therethrough, to a low pressure drain passage whereby when the solenoid valve is closed, fluid pressure on opposite ends of the actuator cylinder is substantially balanced whereby to permit seating of the poppet valve by the return spring, and when the solenoid valve is open, a force unbalance will occur across the actuator piston to effect hydraulic unseating of the poppet valve.