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1. EP3572664 - HIGH-PRESSURE PUMP

Office
European Patent Office
Application Number 18741821
Application Date 23.01.2018
Publication Number 3572664
Publication Date 27.11.2019
Publication Kind A4
IPC
F02M 59/44
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
44Details, component parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02-F02M59/42165
F02M 59/10
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 59/44
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
44Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; ; Pumps having transducers, e.g. to measure displacement of pump rack or piston
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
F02M 59/442
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
44Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; ; Pumps having transducers, e.g. to measure displacement of pump rack or piston
442means preventing fuel leakage around pump plunger, e.g. fluid barriers
Applicants UNITED AUTOMOTIVE ELECT SYS CO
Inventors LI QING
WU ZHONGYU
ZHU YIN
DONG HAOXUN
Designated States
Title
(DE) HOCHDRUCKPUMPE
(EN) HIGH-PRESSURE PUMP
(FR) POMPE HAUTE PRESSION
Abstract
(EN)
A high-pressure pump comprises: a pressure chamber; a piston sleeve (3) arranged inside the pressure chamber; and a protruding component (8) arranged at an outer side of the piston sleeve (3) and attached, in a manner of interference fit, to a wall of the pressure chamber. The piston sleeve (3) comprises a first section (31) and a second section (32) connected thereto. The protruding component (8) is arranged at an outer side of the second section (32) close to the first section (31), and divides the pressure chamber into a first pressure chamber (1) and a second pressure chamber (2). The first section (31) is located inside the first pressure chamber (1). By moving down the location of the protruding component (8), provided that the volumetric efficiency is unchanged, the high-pressure pump can achieve a larger piston gap and less piston pair wear during an oil suction process, and can achieve a longer service life.

(FR)
L'invention concerne une pompe haute pression comprenant : une chambre de pression; une chemise de piston (3) disposée à l'intérieur de la chambre de pression; et un composant en saillie (8) disposé au niveau d'un côté extérieur de la chemise de piston (3) et fixé, d'une manière à ajustement serré, à une paroi de la chambre de pression. La chemise de piston (3) comprend une première section (31) et une seconde section (32) reliée à cette dernière. Le composant en saillie (8) est disposé d'un côté extérieur de la seconde section (32) à proximité de la première section (31), et divise la chambre de pression en une première chambre de pression (1) et une seconde chambre de pression (2). La première section (31) est située à l'intérieur de la première chambre de pression (1). Le fait de déplacer vers le bas la position du composant en saillie (8), à condition que le rendement volumétrique ne change pas, permet à la pompe haute pression d'obtenir un espace de piston plus grand et moins d'usure associée de piston pendant un processus d'aspiration d'huile, et d'avoir une durée de vie plus longue.

Also published as
EP2018741821