GB1471634A - Fuel injection systems for diesel engines - Google Patents

Fuel injection systems for diesel engines

Info

Publication number
GB1471634A
GB1471634A GB2785775A GB2785775A GB1471634A GB 1471634 A GB1471634 A GB 1471634A GB 2785775 A GB2785775 A GB 2785775A GB 2785775 A GB2785775 A GB 2785775A GB 1471634 A GB1471634 A GB 1471634A
Authority
GB
United Kingdom
Prior art keywords
pressure
valve
control duct
line
injection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2785775A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer AG
Original Assignee
Sulzer AG
Gebrueder Sulzer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of GB1471634A publication Critical patent/GB1471634A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

1471634 Fuel injection systems SULZER BROS Ltd 2 July 1975 [2 July 1974] 27857/75 Heading F1B A fuel injection system, for a diesel engine, comprises an injection valve 1 which has a pressurized fuel inlet, connected to line 2, and is connected by a control duct 5 filled with fluid to an injection controller 4, and is arranged to be opened by pressures in the control duct exceeding a threshold pressure, while the injection controller 4 is arranged to supply to the control duct 5 periodic pressure pulses whose duration is variable up to a maximum duration, and whose pressure is not less than the mean of the threshold pressure and the pressure supplied to the control duct between pulses, but is less than the threshold pressure and whose maximum duration is less than twice the time taken for a pressure wave to travel through the fluid along the length of the control duct. Pressurized fuel from line 2 passes through passage 16 to nozzle 17 and also acts on the top of plunger 24 which bears on piston 20 which is connected to needle 15. Pump 6 provides pressurized fuel in delivery line 8 and to a valve 12, which in a first position discharges the fuel to a sump 7 and in a second position connects line 8 to control duct 5. Valve 12 is operated periodically to open for the injection period and as it opens the pressure in line 8 propagates into control duct 5 as a positive pressure wave which moves at sonic speed. When valve 12 closes there is an abrupt drop in pressure which propagates into duct 5 as a negative pressure wave. When the leading edge of the pulse reaches injector 1, the pulse is reflected and produces a pressure which is greater than the control pressure and acts on piston 20 to enable needle 15 to lift. The injector remains open for a period of time corresponding to the length of the pulse. When the reflected pulse reaches the valve 12, its energy is dissipated through valve 14.
GB2785775A 1974-07-02 1975-07-02 Fuel injection systems for diesel engines Expired GB1471634A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH904574A CH579712A5 (en) 1974-07-02 1974-07-02

Publications (1)

Publication Number Publication Date
GB1471634A true GB1471634A (en) 1977-04-27

Family

ID=4347719

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2785775A Expired GB1471634A (en) 1974-07-02 1975-07-02 Fuel injection systems for diesel engines

Country Status (8)

Country Link
JP (1) JPS5125630A (en)
CH (1) CH579712A5 (en)
DK (1) DK133995B (en)
FR (1) FR2277245A1 (en)
GB (1) GB1471634A (en)
IT (1) IT1039610B (en)
NL (1) NL155634B (en)
SE (1) SE399302B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2524073B1 (en) * 1982-03-29 1987-01-09 Renault ELECTROMAGNETIC INJECTOR FOR A DIESEL ENGINE PROVIDING A "PRESSURE-TIME" INJECTION LAW
DE3936619A1 (en) * 1989-11-03 1991-05-08 Man Nutzfahrzeuge Ag METHOD FOR INJECTING A FUEL INTO THE COMBUSTION CHAMBER OF AN AIR COMPRESSING, SELF-IGNITION ENGINE, AND APPARATUS FOR CARRYING OUT THIS METHOD

Also Published As

Publication number Publication date
NL155634B (en) 1978-01-16
DE2433112A1 (en) 1976-01-22
NL7409758A (en) 1976-01-06
FR2277245B1 (en) 1979-05-11
IT1039610B (en) 1979-12-10
SE399302B (en) 1978-02-06
DK681274A (en) 1976-01-03
FR2277245A1 (en) 1976-01-30
DE2433112B2 (en) 1976-12-30
DK133995C (en) 1977-01-31
JPS545455B2 (en) 1979-03-16
JPS5125630A (en) 1976-03-02
CH579712A5 (en) 1976-09-15
SE7507265L (en) 1976-01-05
DK133995B (en) 1976-08-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee