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1. (EP1342911) Fuel feed system

Office : European Patent Office
Application Number: 02023632 Application Date: 18.10.2002
Publication Number: 1342911 Publication Date: 10.09.2003
Publication Kind : B1
Designated States: AL,AT,BE,BG,CH,CY,CZ,DE,DK,EE,ES,FI,FR,GB,GR,IE,IT,LI,LT,LU,LV,MC,MK,NL,PT,RO,SE,SI,SK,TR
IPC:
F02M 37/00
F02D 33/00
F02M 55/00
F02M 55/02
F02M 55/04
F02M 59/36
F02M 59/44
F02M 63/00
F02M 63/02
F04B 11/00
F04B 49/24
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
37
Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
D
CONTROLLING COMBUSTION ENGINES
33
Non-electrical control of delivery of fuel or combustion-air, not otherwise provided for
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
55
Fuel-injection apparatus characterised by their fuel conduits or their venting means
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
55
Fuel-injection apparatus characterised by their fuel conduits or their venting means
02
Conduits between injection pumps and injectors
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
55
Fuel-injection apparatus characterised by their fuel conduits or their venting means
04
Means for damping vibrations in injection-pump inlets
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
59
Pumps specially adapted for fuel-injection and not provided for in groups F02M39/-F02M57/126
20
Varying fuel delivery in quantity or timing
36
by variably-timed valves controlling fuel passages
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
59
Pumps specially adapted for fuel-injection and not provided for in groups F02M39/-F02M57/126
44
Details, component parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02-F02M59/42165
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
63
Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/-F02M57/143; Details, component parts or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/-F02M61/193
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
63
Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/-F02M57/143; Details, component parts or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/-F02M61/193
02
Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
B
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
11
Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
B
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
49
Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups F04B1/-F04B47/196
22
by means of valves
24
Bypassing
CPC:
F02M 37/0041
F02D 33/003
F02M 37/0047
F02M 55/04
F02M 59/366
F02M 59/44
F02M 63/0001
F02M 63/0225
F02M 2200/04
F02M 2200/24
F02M 2200/247
F02M 2200/315
F04B 11/0016
F04B 49/243
F04B 2205/01
F04B 2205/02
F04B 2205/05
Applicants: HITACHI LTD
HITACHI CAR ENG CO LTD
Inventors: YAMADA HIROYUKI
USUI SATOSHI
ODAKURA HIROSHI
ONOSE TORU
SAITO ATSUJI
ABE MASAMI
Priority Data: 2002057132 04.03.2002 JP
Title: (DE) Brennstoffversorgungssystem
(EN) Fuel feed system
(FR) Système d'alimentation de carburant
Abstract: front page image
(EN) The invention relates to a fuel feed system capable of feeding a fuel to fuel injection valves at a fuel pressure with improved stability. A fuel feed system for an internal combustion engine including a fuel tank (50) and a low-pressure pump (51) for feeding the fuel in the, fuel tank to fuel injection valves, is provided with a diaphragm type damper (80) having a wave-shape cross section at a position in contact with the fuel. Also, in a high-pressure fuel feed pump including a pressurizing chamber (12) for pressurizing the fuel, a plunger (2) for pumping the fuel within the pressurizing chamber (12), an intake valve (5) provided at a fuel inlet (10) of the pressurizing chamber (12), a discharge valve (6) provided at a fuel outlet (11) of the pressurizing chamber (12), and a low-pressure chamber provided in an upstream of the intake valve (5), a mechanism for reducing fuel pressure pulsation is disposed in a space of the low-pressure chamber provided in the upstream of the intake valve (5), and a fuel pressure sensor (56; 90) for measuring the fuel pressure is mounted near the mechanism for reducing fuel pressure pulsation.
Also published as:
US20030164161US20070107698JP2003254191