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:
Dec. 12, 1978
Filed:
Sep. 12, 1977
Ernest Bader, Jr, Grand Rapids, MI (US);
John I Deckard, Grand Rapids, MI (US);
Dan B Kuiper, Grand Rapids, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An electromagnetic unit fuel injector for use in a diesel engine has a pump including a cam actuated plunger reciprocable in a bushing for intensifying the pressure of fuel delivered to a pressure actuated injection valve controlling flow discharge out through a spray outlet, to a pressure accumulator and, through a throttling orifice passage into one end of a modulation pressure control chamber having a spring biased piston movable therein, the piston engaging one end of the injection valve, this one end of the pressure control chamber downstream of the throttling orifice passage being connected by a conduit, including a solenoid actuated valve controlling flow through a metering orifice to a low pressure fuel drain return line whereby the pressure of fuel in the pressure control chamber acting on the piston is modulated so as to control the seating and unseating of the injection valve.