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:
Apr. 29, 1980
Filed:
May. 01, 1978
Myron U Trenne, Rochester, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A hydraulic valve actuator and fuel injection system for an internal combustion engine includes an engine driven pump, similar to a diesel fuel metering and distributing pump, which is used to sequentially supply pressurized fuel to each of a plurality of hydraulic actuator plungers positioned to effect opening movement of an associated normally closed inlet valve of the engine, the hydraulic line to each actuator plunger having a solenoid valve associated therewith for controlling flow from the hydraulic line to a relatively low pressure drain conduit whereby to control inlet valve lift duration. Each actuator plunger, during inlet valve opening movement, is used to pressurize liquid fuel for injection into the induction fluid flow to an associated combustion chamber of the engine. In one embodiment, one end of the actuator plunger and one end of its associated actuator cylinder functions as a variable displacement fuel pump supplying fuel to an injection nozzle, and in an alternate embodiment, each actuator plunger is operatively coupled to an associated unit type fuel injector to effect operation thereof.