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. 03, 1996
Filed:
Nov. 14, 1995
Wartsila Diesel International LTD OY, Helsinki, FI;
Abstract
An injection arrangement for injecting a pressure medium, especially fuel, into a cylinder of an internal combustion engine, specifically a large diesel engine with several cylinders, comprising at least two injection pump elements (1a,1b) arranged in a common pump body (1) and arranged to inject the pressure medium into the same cylinder during at least one continuous injection period, each pump element (1a,1b) including a pump cylinder (7a,7b), a piston member (8a,8b) reciprocatingly movable therein and a pressure chamber (13,13a,13b). The piston members (8a,8b) receive their control from a cam race (5a,5b) of at least one cam arranged in a camshaft (4) or the like of the engine and the pressure chambers (13,13a,13b,13c) in the pump cylinders (7a,7b) are continuously in connection with each other. In order to determine the entire volume of the injection during said injection period as well as the speed and timing of the injection affecting it the piston members (8a,8b) are provided with control edges for the timing of the injection so that the control edge (10b) in one of the piston members (8b) determines the starting moment of the injection and the control edge (10a) in the other piston member (8a) respectively determines the termination of the injection during movement of the piston members (8a,8b) towards the direction of the pressure chambers (13,13a,13b,13c).