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:
Feb. 25, 1986
Filed:
Sep. 17, 1984
Stuart W Nicol, London, GB;
Lucas Industries Public Limited Company, Birmingham, GB;
Abstract
A fuel injection system for an internal combustion engine includes a high pressure injection pump which supplies fuel in timed relationship with an associated engine to an injection nozzle of the engine. A pilot injection device is included in the fuel circuit to the nozzle and includes a shuttle slidable in a cylinder with one end of the cylinder being connected to the pump and the other end to the nozzle. A spring biases the shuttle towards stop means at the one end of the cylinder. In the wall of the cylinder is a pair of spaced ports the first port communicating with a low pressure source and the second port with the pump. The shuttle has a pair of spaced grooves each communicating with the other end of the cylinder. In use, when the pump delivers fuel the shuttle starts to move and displaces fuel to the nozzle until the first groove communicates with the first port. While this communication is established no fuel is supplied to the nozzle and the pressure at the nozzle is reduced. During continued movement of the shuttle the aforesaid communication is broken and fuel supply to the nozzle is re-established, the shuttle continuing to move until the second groove communicates with the second port.