WO2012008892A1 - Fuel injection system with pressure-controlled bleed function - Google Patents
Fuel injection system with pressure-controlled bleed function Download PDFInfo
- Publication number
- WO2012008892A1 WO2012008892A1 PCT/SE2011/000113 SE2011000113W WO2012008892A1 WO 2012008892 A1 WO2012008892 A1 WO 2012008892A1 SE 2011000113 W SE2011000113 W SE 2011000113W WO 2012008892 A1 WO2012008892 A1 WO 2012008892A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel injection
- pressure
- fuel
- inlet
- injection system
- Prior art date
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
-
- 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
- F02M37/00—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
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
- F02M37/0029—Pressure regulator in the low pressure fuel system
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
-
- 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
- F02M37/00—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
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/005—Pressure relief valves
- F02M63/0052—Pressure relief valves with means for adjusting the opening pressure, e.g. electrically controlled
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Definitions
- the most suitable type of FIE for high-volatility fuels such as DME, is a common rail system well-known in the art.
- a common rail system usually incorporates a multi-plunger high-pressure pump that supplies fuel under high pressure to injectors via a common rail.
- the typical high-pressure pump of a common rail system has evolved to incorporate the output control concept based on the inlet metering principle and fixed plunger displacement. This makes use of a single electronically controlled inlet metering valve (IMV) to define the amount of fuel reaching the plungers during their respective inlet strokes.
- IMV electronically controlled inlet metering valve
- varying the valve's restriction varies the output of the plungers which, in turn, at a given engine consumption, varies the common rail pressure.
- One way of alleviating this problem is to thermally insulate the suction channel from the surrounding parts. This works well down to a certain minimum fuel flow in the suction channel, but still the vaporization can take place when the flow is under that minimum, or when there isn't flow at all, for a relatively long period of time.
- the operating conditions requiring extremely low or no output from the high-pressure pump and correspondingly low through-flow in the suction channel can occur frequently and it can be necessary for the pump to change from that to full output almost immediately, such as when a hot engine needs to start or when high torque is demanded after a period of engine braking.
- Once fuel is allowed to vaporize in the suction channel the hydraulic efficiency of the pump is dramatically reduced and it can then take a long time before the pump can provide full output, unless special action is taken.
- a separate return line is provided between the bleed valve and the downstream of the feed pressure-setting restriction in the re-circulation circuit. This is necessary because otherwise the bleed path becomes parallel to the main re-circulation path that is designed to have as low restriction as possible up to the feed pressure- setting restriction, and in that case the pressure head across the suction channel and the bleed valve would be too small to drive the vapour out of the pump.
- the pressure-setting restriction has to be positioned relatively far away from the pump, the extra cost and complexity caused by the need for such separate return line, can be significant.
- a general advantage of the present invention is that it ensures automatic and effective removal of vapour that may form in the fuel and disrupt normal operation of the fuel injection pump, thereby enhancing the reliability and robustness of the control of delivery of pressurized fuel for injection into the internal combustion engine.
- a fuel injection system for pressurizing fuel and delivering it for injection into an internal combustion engine
- said system comprises a high-pressure fuel injection pump with an inlet (for receiving fuel from e.g. a fuel tank), at least one plunger (that pressurizes the received fuel and delivers it to injectors for injection into the internal combustion engine), a suction channel positioned between the inlet and the at least one plunger (thereby connecting the inlet of the high-pressure fuel injection pump with the inlet port of the at least one plunger), and a bleed valve connected to the suction channel for removal of vapour that may in certain circumstances form in the suction channel, and for cooling down the suction channel in order to prevent conditions causing further vaporization of the fuel in the suction channel.
- the fuel injection system further comprises a return port (for leading any leakage and recirculated fuel back to a fuel tank). To ensure effective removal of vapour by the bleed valve, a selector valve is installed between the inlet and the return port.
- the said predetermined level of plunger pressure is chosen to be somewhat below the minimum setpoint pressure at which the engine is designed to operate, but at the same time above the pressure that the high-pressure pump is able to maintain when the fuel in the suction channel is vaporized. Then, in the event of
- the selector valve will close the connection of the inlet to the return port and establish full re-circulation flow through the IMV, the suction channel and the bleed non-return valve, thereby quickly removing the vapour already formed and cooling the suction channel to prevent further vaporization.
- the pump will regain full output and quickly restore its outlet pressure to a given setpoint, at which instant further rise of output pressure would be checked by the IMV controlled by the EMS.
- the invention advantageously allows a common feed pressure-setting restriction to be positioned downstream of the return port, because the selector valve allows establishing a series connection of the inlet and the suction channel to the return port, such that the bleed function is not reteriorated by by-pass re-circulation flow from the inlet to the return port.
- any or both of the bleed and selector valves are made electronically controlled, such that it is possible to control the bleed function with the EMS.
- a high-pressure fuel injection pump with three plungers 9 which plungers 9 are phase-shifted in their pumping operation cycles.
- the system further comprises a selector valve 1 1 with a return spring 12, said valve being connected by its control port 13 to an outlet pressure port 14 of the high-pressure pump 5, and a bleed valve 5 in the form of a nonreturn valve connected by its inlet to the suction channel 8.
- the fuel at feed pressure is then admitted through the IMV 7 to the suction channel 8 and further to the inlet ports of the three pumping plungers 9 that are phase-shifted in their pumping operation cycles, as shown in the Figure.
- the plungers 9 fill in the mass of fuel that depends on the EMS- controlled restriction of the IMV 7, and then pump it out of the high-pressure fuel injection pump 5 through the outlet pressure port 14 and into the injector 10 for injecting it into the internal combustion engine.
- the excess flow of fuel from the feed pump 2 is directed through the selector valve 1 1 , which is open by the pressure at its control port 13, to the return port 4 and into the restrictor 3.
- the check valve 15 is closed by the pressure at the return port 4 applied to its outlet.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/809,895 US9541045B2 (en) | 2010-07-14 | 2011-06-15 | Fuel injection system with pressure-controlled bleed function |
CN201180034787.8A CN103080531B (en) | 2010-07-14 | 2011-06-15 | Fuel injection system with pressure-controlled bleed function |
RU2013106153/06A RU2555607C2 (en) | 2010-07-14 | 2011-06-15 | Fuel delivery system with vapour discharge function |
EP11807136.4A EP2593660A4 (en) | 2010-07-14 | 2011-06-15 | Fuel injection system with pressure-controlled bleed function |
JP2013519624A JP5825693B2 (en) | 2010-07-14 | 2011-06-15 | Fuel injection system with pressure controlled bleed function |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1000767-2 | 2010-07-14 | ||
SE1000767 | 2010-07-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012008892A1 true WO2012008892A1 (en) | 2012-01-19 |
Family
ID=45469685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2011/000113 WO2012008892A1 (en) | 2010-07-14 | 2011-06-15 | Fuel injection system with pressure-controlled bleed function |
Country Status (6)
Country | Link |
---|---|
US (1) | US9541045B2 (en) |
EP (1) | EP2593660A4 (en) |
JP (1) | JP5825693B2 (en) |
CN (1) | CN103080531B (en) |
RU (1) | RU2555607C2 (en) |
WO (1) | WO2012008892A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015048983A1 (en) | 2013-10-04 | 2015-04-09 | Volvo Truck Corporation | Fuel injection system for low-viscosity fuels |
WO2015169745A1 (en) * | 2014-05-09 | 2015-11-12 | Robert Bosch Gmbh | Pumping unit for feeding fuel, preferably diesel fuel, from a storage tank to an internal combustion engine |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2655856B1 (en) * | 2010-12-22 | 2019-10-02 | Volvo Lastvagnar AB | Fuel injection system comprising a high-pressure fuel injection pump |
JP6389057B2 (en) * | 2014-04-25 | 2018-09-12 | Kddi株式会社 | Menu generation server, menu display program, menu display method, and menu display system |
WO2016177431A1 (en) * | 2015-05-07 | 2016-11-10 | Volvo Truck Corporation | Fuel pump assembly |
US11846246B2 (en) * | 2021-05-27 | 2023-12-19 | Thermo King Llc | Methods and systems for controlling engine inlet pressure via a fuel delivery system of a transport climate control system |
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2011
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- 2011-06-15 RU RU2013106153/06A patent/RU2555607C2/en not_active IP Right Cessation
- 2011-06-15 JP JP2013519624A patent/JP5825693B2/en not_active Expired - Fee Related
- 2011-06-15 EP EP11807136.4A patent/EP2593660A4/en not_active Withdrawn
- 2011-06-15 US US13/809,895 patent/US9541045B2/en not_active Expired - Fee Related
- 2011-06-15 WO PCT/SE2011/000113 patent/WO2012008892A1/en active Application Filing
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EP0995897A2 (en) * | 1998-10-21 | 2000-04-26 | Toyota Jidosha Kabushiki Kaisha | High-pressure fuel supplying apparatus and method for internal combustion engine |
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Title |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015048983A1 (en) | 2013-10-04 | 2015-04-09 | Volvo Truck Corporation | Fuel injection system for low-viscosity fuels |
WO2015049062A1 (en) * | 2013-10-04 | 2015-04-09 | Volvo Truck Corporation | Fuel injection system for low-viscosity fuels |
WO2015169745A1 (en) * | 2014-05-09 | 2015-11-12 | Robert Bosch Gmbh | Pumping unit for feeding fuel, preferably diesel fuel, from a storage tank to an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
RU2013106153A (en) | 2014-08-20 |
US9541045B2 (en) | 2017-01-10 |
CN103080531A (en) | 2013-05-01 |
RU2555607C2 (en) | 2015-07-10 |
US20130213357A1 (en) | 2013-08-22 |
JP5825693B2 (en) | 2015-12-02 |
JP2013531176A (en) | 2013-08-01 |
EP2593660A4 (en) | 2014-01-29 |
CN103080531B (en) | 2015-07-22 |
EP2593660A1 (en) | 2013-05-22 |
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