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EP3438445A1 - Dispositif de pressurisation de carburant - Google Patents

Dispositif de pressurisation de carburant Download PDF

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Publication number
EP3438445A1
EP3438445A1 EP18183555.4A EP18183555A EP3438445A1 EP 3438445 A1 EP3438445 A1 EP 3438445A1 EP 18183555 A EP18183555 A EP 18183555A EP 3438445 A1 EP3438445 A1 EP 3438445A1
Authority
EP
European Patent Office
Prior art keywords
dimv
inlet
pumping
fuel
cycle
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.)
Granted
Application number
EP18183555.4A
Other languages
German (de)
English (en)
Other versions
EP3438445B1 (fr
Inventor
Stephen Joseph MACLANE
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.)
Phinia Delphi Luxembourg SARL
Original Assignee
Delphi Technologies IP Ltd
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 Delphi Technologies IP Ltd filed Critical Delphi Technologies IP Ltd
Publication of EP3438445A1 publication Critical patent/EP3438445A1/fr
Application granted granted Critical
Publication of EP3438445B1 publication Critical patent/EP3438445B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/14—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons
    • F02M41/1405—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons pistons being disposed radially with respect to rotation axis
    • F02M41/1411—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons pistons being disposed radially with respect to rotation axis characterised by means for varying fuel delivery or injection timing
    • F02M41/1427—Arrangements for metering fuel admitted to pumping chambers, e.g. by shuttles or by throttle-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
    • 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
    • F02M59/205—Quantity of fuel admitted to pumping elements being metered by an auxiliary metering device
    • 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
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • F02M59/367—Pump inlet valves of the check valve type being open when actuated
    • 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
    • F02M59/44—Details, 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
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • 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
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/13—Special devices for making an explosive mixture; Fuel pumps
    • F02M2700/1317—Fuel pumpo for internal combustion engines
    • F02M2700/1358—Fuel pump with control of fuel inlet to the pumping chamber

Definitions

  • the present invention relates to a pressurising device of a fuel injection equipment wherein a single metering valve controls the inlet flow into a high pressure pump performing one or two pumping cycles.
  • a diesel fuel injection equipment arranged on an internal combustion engine comprises a high pressure pump receiving a low pressure upstream fuel flow and delivering to a common rail and to injectors a high pressure downstream flow.
  • An inlet metering valve connected to a command unit limits said upstream flow to the quantity required to match the engine torque and power demand.
  • a pressurising device of a direct fuel injection equipment (FIE) of a diesel internal combustion engine comprising a digital inlet metering valve (DIMV), controlling an inlet fluid communication to a pump performing, in use, a pumping cycle in a pumping head, said cycle being the alternation of a filling phase and a compression phase.
  • DIMV digital inlet metering valve
  • the DIMV and the pump are integrated in a single housing forming in compact assembly of the FIE.
  • the pump comprises:
  • the DIMV comprises an electro 2-way valve controlling the inlet into a buffer chamber connected to the inlet.
  • the fuel fills said buffer chamber and from there fills the compression chamber of the pumping head that is in filling phase PF and which volume increases.
  • the pump is a twin-head-pump performing, in use, said first pumping cycle in said first pumping head and, a second pumping cycle in a second pumping head, said cycles being the alternation of a filling phase and a compression phase, said first and second cycles being in opposition of phase of one another so that, the compression phase of a cycle is simultaneous to the filling phase of the other cycle.
  • the DIMV controls the inlet fluid communication to said twin-head-pump and it switches to an open state after either cycle initiates a filling phase and, switches to a closed state when approaching the end of said filling phase.
  • the DIMV and the twin-head-pump are integrated in a single housing forming in compact assembly of the FIE.
  • low pressure fuel exiting the DIMV is delivered to the twin-head-pump wherein it is compressed in the first pumping cycle or in the second pumping cycle.
  • twin-head-pump comprises:
  • the fuel fills said buffer chamber and from there fills the compression chamber, of the pumping head, that is in filling phase PF and which volume increases.
  • the invention further extends to a fuel injection equipment for a diesel internal combustion engine, said FIE comprising a pressurising unit as previously described.
  • the invention further extends to a control method of a fuel injection equipment as claimed in claim, the method comprising the following steps:
  • the step switching the DIMV to an open state enables fuel to fill the buffer chamber when the pumping cycle initiates a filling phase, the inlet valves being closed preventing fuel entry into the compression chamber then, subsequent to said switching step, the method comprises the step
  • the method may comprise the following steps:
  • the step switching the DIMV to an open state enables fuel to fill the buffer chamber when either of the pumping cycles initiates a filling phase, both first and second inlet valves, being closed preventing fuel entry into the compression chambers then, subsequent to said switching step, the method comprises the step
  • the invention further extends to an electronic command unit adapted execute a method as described above.
  • a diesel internal combustion engine provided with a direct fuel injection equipment 6 is controlled by a command unit (ECU) 8.
  • ECU command unit
  • diesel fuel stored in a tank at low pressure, or atmospheric pressure is sent to a pressurising device 10 comprising a digital inlet metering valve 12, hereafter DIMV 12, and a high pressure pump 14.
  • DIMV 12 digital inlet metering valve 12
  • high pressure pump 14 After being pressurised in said pump 14, the fuel is delivered to a common rail then to fuel injectors, which along with the tank are drawn in dotted lines in the figures.
  • the pump 14 comprises a pumping head 16 and, upon command signals received from the ECU 8 the DIMV 12 controls the upstream flow entering said pumping head 16.
  • the DIMV 12 is an electro actuated 2-way valve comprising an actuator such as a solenoid, controlling a valve member opening, or closing, the fuel entry into a buffer chamber 20 wherefrom said fuel is oriented toward the pumping head 16; said pumping head 16 performing a pumping cycle C1, shown in figure 2 , that is the alternation of a filling phase PF and of a compression phase PC.
  • the pump 14 comprises two or more pumping heads, all performing a pumping cycle in phase with each other.
  • the buffer chamber 20 is, in this alternative, in fluid communication with all the pumping heads of the pump 14.
  • fuel is pressurised in a compression chamber 22 defined at the end of a bore 24 in which a piston 26 urged by a rotating cam 28 is reciprocally guided along a pumping axis X1.
  • a compression chamber 22 defined at the end of a bore 24 in which a piston 26 urged by a rotating cam 28 is reciprocally guided along a pumping axis X1.
  • pressure drops in said compression chamber 22 opening an inlet 32 by moving an inlet valve member 30.
  • Fuel at low pressure is sucked through said inlet 32 in said compression chamber 22.
  • the pressure in said compression chamber 22 rises moving the inlet valve member 30 into a closed position of the inlet 32.
  • the fuel is then pressurised in said compression chamber 22 prior to being expelled when said pressure overcomes a threshold forcing a outlet valve member 34 to open an outlet 36.
  • the figures show a single rotating cam urging the pistons but, in alternative embodiments, the pump 14 may comprise several cams.
  • the cam 28 is can be a multi-lobe cam and, the pumping axes are arranged to create the simultaneity of the pumping cycles. For instance, in a two head pump an elliptical cam having two lobes, may urge simultaneously two pistons opposed at 180° and, in a four head pump, a square came (with rounded corners) simultaneously urges four piston arranged at 90° from each other.
  • the inlet valve members 30 is a passive valve moving under the influence of pressure difference between the compression chamber and the other side of the valve member, the inlet channel.
  • the valve 30 can cooperate with an actuator, such as a solenoid, which advances the opening or retards the closing of the valve member.
  • a DIMV 12 controls the inlet to the pumping head.
  • the following sequence, illustrated by figure 2 where the cycle C1 starts with a filling phase PF describes steps of a method 100 executed by the ECU 8 in order to control the fuel quantity compressed in the compression chamber.
  • the control method 100 comprises the following steps:
  • the fuel enters the compression chamber as soon as the inlet valve opens at beginning of the filing phase PF and, when the DIMV 12 closes the pressure difference between the buffer chamber 20 and the compression chamber cancels very rapidly, this closing the inlet valve and ending said fuel entry right after closing the DIMV 12.
  • the fuel quantity in the compression chamber is then controlled by closing the DIMV 12.
  • the pressurising device 10 of the fuel injection equipment 6 comprises the DIMV 12, and a twin-head-pump 14.
  • the twin-head-pump 14 comprises the first pumping head 16, previously identified as the pumping head 16, and a second pumping head 18.
  • the DIMV 12 controls the upstream flow entering said two pumping heads 16, 18.
  • the DIMV 12 is an electro actuated 2-way valve comprising an actuator such as a solenoid controlling a valve member opening, or closing, the fuel entry into the buffer chamber 20 wherefrom said fuel is oriented toward the first pumping head 16 performing the first pumping cycle C1 or, toward the second pumping head 18 performing a second pumping cycle C2.
  • Each pumping cycle C1, C2 is the alternation of a filling phase PF and a compression phase PC and, in said twin-head-pump 14 the two cycles C1, C2 are in opposition of phase, the filling phase PF of a pumping head being simultaneous to the compression phase PC of the other pumping head.
  • the pump 14 is a multi-head pump comprising three, four or more pumping heads, some performing said first pumping cycle C1, the other performing the second pumping cycle C2 in opposition of phase with C1.
  • the buffer chamber 20 is in fluid communication with all the pumping heads of the multi-head pump 14.
  • the first pumping head 16 is, as previously described, with the first compression chamber 22, the first bore 24, the first piston 26, the first pumping axis X1, the first inlet valve member 30, the first inlet 32, the first outlet valve member 34 and the first outlet 36.
  • the cam 28 is typically a two-lobe cam opposed at 180°, as in an oval or elliptical shape and, the pumping axis X1, X2 are at 90° from each other.
  • Said arrangement of cam profile and angled axis creates the opposition of phases although other arrangements, such as a one lobe cam and two pistons opposed at 180° or, pistons urged by different cams may achieve a similar result.
  • a third head is opposed at 180° of the first head 16 and, a fourth head is opposed at 180° of the second head 18, thus the first and third heads performing the first cycle C1 and, the second and fourth heads performing the second cycle C2.
  • first and second inlet valve members 30, 44 are passive valves moving under the influence of difference between the pressure in the compression chamber and the pressure on the other side of the valve member.
  • the valves 30, 44 can cooperate with an actuator, such as a solenoid, which advances the opening or retards the closing of the valve member.
  • a single DIMV 12 controls the inlet to the two pumping heads.
  • the control method 100 comprises the following steps:
  • the fuel enters the compression chamber as soon as the inlet valve member opens at beginning of the filing phase PF and, later in said phase when the DIMV 12 closes the pressure difference between the buffer chamber 20 and the compression chamber cancels which closes the inlet valve member right after the DIMV 12 closes, ending said fuel entry.
  • the fuel quantity in the compression chamber is then controlled by closing the DIMV 12.
  • DIMV 12 and buffer chamber 20 serve two pumping head.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
EP18183555.4A 2017-08-01 2018-07-13 Dispositif de pressurisation de carburant Active EP3438445B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1712342.3A GB2565093B (en) 2017-08-01 2017-08-01 Fuel Pressurising device

Publications (2)

Publication Number Publication Date
EP3438445A1 true EP3438445A1 (fr) 2019-02-06
EP3438445B1 EP3438445B1 (fr) 2023-10-25

Family

ID=59778957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18183555.4A Active EP3438445B1 (fr) 2017-08-01 2018-07-13 Dispositif de pressurisation de carburant

Country Status (2)

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EP (1) EP3438445B1 (fr)
GB (1) GB2565093B (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816672A2 (fr) * 1996-07-05 1998-01-07 Nippon Soken, Inc. Pompe haute pression pour système d'injection de combustible de moteur Diesel
EP0902181A2 (fr) * 1997-09-11 1999-03-17 Denso Corporation Pompe à haute pression à débit variable
US20060000447A1 (en) * 2004-06-30 2006-01-05 C.R.F. Societa Consortile Per Azioni High-pressure variable-flow-rate pump for a fuel-injection system
EP2050952A1 (fr) * 2007-10-16 2009-04-22 Delphi Technologies, Inc. Pompe à carburant
EP2647824A1 (fr) * 2012-04-05 2013-10-09 Delphi Technologies Holding S.à.r.l. Systèmes de pompe à injection et procédés de fonctionnement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002098021A (ja) * 2000-09-25 2002-04-05 Toyota Motor Corp 複合電磁弁、高圧ポンプおよび高圧ポンプ制御装置
DE102008043237A1 (de) * 2008-10-28 2010-04-29 Robert Bosch Gmbh Kraftstoff-Hochdruckpumpe für eine Brennkraftmaschine
WO2016177431A1 (fr) * 2015-05-07 2016-11-10 Volvo Truck Corporation Ensemble de pompe à carburant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816672A2 (fr) * 1996-07-05 1998-01-07 Nippon Soken, Inc. Pompe haute pression pour système d'injection de combustible de moteur Diesel
EP0902181A2 (fr) * 1997-09-11 1999-03-17 Denso Corporation Pompe à haute pression à débit variable
US20060000447A1 (en) * 2004-06-30 2006-01-05 C.R.F. Societa Consortile Per Azioni High-pressure variable-flow-rate pump for a fuel-injection system
EP2050952A1 (fr) * 2007-10-16 2009-04-22 Delphi Technologies, Inc. Pompe à carburant
EP2647824A1 (fr) * 2012-04-05 2013-10-09 Delphi Technologies Holding S.à.r.l. Systèmes de pompe à injection et procédés de fonctionnement

Also Published As

Publication number Publication date
GB2565093B (en) 2020-03-25
EP3438445B1 (fr) 2023-10-25
GB201712342D0 (en) 2017-09-13
GB2565093A (en) 2019-02-06

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