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1. CN106762299 - 高压泵

Office
China
Application Number 102017000058832
Application Date 23.01.2017
Publication Number 106762299
Publication Date 31.05.2017
Publication Kind A
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
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 联合汽车电子有限公司
Inventors 李卿
伍中宇
朱银
董浩训
Agents 上海思微知识产权代理事务所(普通合伙) 31237
Title
(ZH) 高压泵
Abstract
(ZH)
本发明提供了一种高压泵,所述高压泵的柱塞套包括第一段及与第一段连接的第二段,突出部件设置于第二段靠近第一段的外侧上,第一段位于第一压力腔内,相比现有技术本发明的过盈点位置下移。在泵油阶段,第一段在其内外压差作用下向内变形收缩,第一段与柱塞之间的间隙缩小,有效减小间隙回流的损失;在吸油阶段,第一段的内外没有压差,使第一段由收缩状态恢复至变形前的状态。因此,在具有同等容积效率的前提下,与现有高压泵相比,本发明的高压泵在吸油行程具有更大的柱塞间隙,更少的柱塞副磨损,更多的寿命余量,从而可进一步缩小柱塞副的加工间隙以提升容积效率,而无需增加重量或采用更高成本的材料。

Also published as
EP2018741821