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1. WO2015128133 - FUEL PUMPING MECHANISM

Publication Number WO/2015/128133
Publication Date 03.09.2015
International Application No. PCT/EP2015/051453
International Filing Date 26.01.2015
IPC
F02M 59/10 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
59Pumps specially adapted for fuel-injection and not provided for in groups F02M39/-F02M57/126
02of reciprocating-piston type
10characterised by the piston drive
CPC
F02M 59/102
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
59Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00 ; , e.g. rotary cylinder-block type of pumps
02of reciprocating-piston ; or reciprocating-cylinder; type
10characterised by the piston-drive
102Mechanical drive, e.g. tappets or cams
F04B 1/14
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
1Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
12having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
14having stationary cylinders
F04B 9/04
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
9Piston machines or pumps characterised by the driving or driven means to or from their working members
02the means being mechanical
04the means being cams, eccentrics or pin-and-slot mechanisms
Applicants
  • DELPHI INTERNATIONAL OPERATIONS LUXEMBOURG S.À R.L. [LU]/[LU]
Inventors
  • MCCRINDLE, Christopher
Agents
  • FOULKES, Laura
Priority Data
14156469.025.02.2014EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FUEL PUMPING MECHANISM
(FR) MÉCANISME DE POMPAGE DE CARBURANT
Abstract
(EN)
Internal combustion engine fuel pumping mechanism (200), comprising a pumping element (214) such as a plunger, moveable within first location bore (220), an intermediate member (212) such as a tappet, movable within a second location bore, and a driving mechanism such as a cam (210), wherein during a pumping stroke, cam load is transferred to the plunger (214) via contact surfaces plunger (218) and tappet contact surfaces (216), the plunger contact surface (218) being radiused, and the tappet contact surface (216) being angled at a selected angle (A) with respect to an axial axis of the tappet (212), such that when the tappet (212) tilts within the second location bore on application of cam load, the tappet (212) contact surface becomes orthogonal with a longitudinal axis of the second bore and the plunger (214), ensuring a substantially central contact point between the contact surfaces. The inventive concept also extends to an intermediate member (212) comprising a contact surface (216) which is angled with respect to an axial axis of the intermediate member (212).
(FR)
L'invention concerne un mécanisme (200) de pompage de carburant de moteur à combustion interne, qui comprend un élément de pompage (214) tel qu'un piston, mobile au sein d'un premier alésage de localisation (220), un élément intermédiaire (212) tel qu'un poussoir, mobile au sein d'un second alésage de localisation, et un mécanisme d'entraînement tel qu'une came (210), caractérisé en ce que, durant une course de pompage, la charge de la came est transférée au piston (214) par l'intermédiaire de surfaces de contact du piston (218) et de surfaces de contact de poussoir (216), la surface de contact de piston (218) présentant un rayon et la surface de contact de poussoir (216) étant inclinée selon un angle sélectionné (A) par rapport à un axe axial du poussoir (212), de telle sorte que lorsque le poussoir (212) s'incline à l'intérieur du second alésage de localisation lors de l'application de la charge de came, la surface de contact du poussoir (212) devienne orthogonale par rapport à un axe longitudinal du second alésage et au piston (214), ce qui assure un point de contact sensiblement central entre les surfaces de contact. Le concept de l'invention s'étend également à un élément intermédiaire (212) comprenant une surface de contact (216) qui est inclinée par rapport à un axe axial de l'élément intermédiaire (212).
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