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:
Sep. 10, 1985
Filed:
Oct. 26, 1983
Richard F Teerman, Wyoming, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An electromagnetic unit fuel injector for use in a diesel engine includes a housing having a bushing with an externally actuated plunger reciprocable therein to define a pump chamber open at one end for the discharge of fuel to a spring biased, pressure actuated fuel injection nozzle. The pump chamber is connected to a supply/spill chamber means via flow-through solenoid with pivot armature actuated, normally open, hollow pressure sensitive valve to permit the ingress and egress of fuel. The supply/spill chamber means adjacent to the head of the valve is in flow communication with a source of fuel at a relatively low supply pressure. During a pump stroke of the plunger, the solenoid can be energized, as desired, to effect pivotal movement of the pivot armature located so as to axially push the pressure sensitive valve to a closed position relative to an associate valve seat whereby to block flow from the pump chamber to the supply/spill chamber means, thus allowing the plunger to effect pressurization of the fuel so as to effect discharge of fuel from the injection nozzle.