WO2017093442A1 - Fuel pump - Google Patents

Fuel pump Download PDF

Info

Publication number
WO2017093442A1
WO2017093442A1 PCT/EP2016/079510 EP2016079510W WO2017093442A1 WO 2017093442 A1 WO2017093442 A1 WO 2017093442A1 EP 2016079510 W EP2016079510 W EP 2016079510W WO 2017093442 A1 WO2017093442 A1 WO 2017093442A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
fuel pump
regulator
pump
fts
Prior art date
Application number
PCT/EP2016/079510
Other languages
French (fr)
Inventor
Raúl VAZQUEZ LOPEZ
Original Assignee
Delphi International Operations Luxembourg S.À R.L.
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 International Operations Luxembourg S.À R.L. filed Critical Delphi International Operations Luxembourg S.À R.L.
Publication of WO2017093442A1 publication Critical patent/WO2017093442A1/en

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
    • 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
    • F02M59/361—Valves being actuated mechanically
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0606—Fuel temperature
    • F02D2200/0608—Estimation of fuel temperature
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors

Definitions

  • the present invention relates to a fuel pump such as a diesel pump, and more specifically to a Transfer Pressure Regulator and a Fuel Temperature Sensor for a fuel pump.
  • Known fuel pumps systems comprising a fuel transfer pump are usually provided with a regulator, to set the pressure of fuel feeding high and low pressure circuits of the pump, also known as the transfer pressure (TP).
  • TP transfer pressure
  • FIG. 1 An example of a known fuel pump system 100, i.e. a fuel pump hydraulic circuit, is illustrated schematically in Figure 1 and comprises a fuel pump 102, a high pressure connector 10, which connects the fuel pump 102 to a rail 11, and a low pressure connector 3, which connects the fuel pump 102 to a fuel tank 1.
  • the fuel pump 102 comprises a fuel transfer pump 4, a transfer pressure (TP) regulator 5, which sets the transfer pressure of the fuel feeding the high and low pressure circuits, and a temperature sensor 8, which measure fuel temperature at an inlet.
  • TP transfer pressure
  • the known FTS 8 as illustrated in detail in Figure 3, comprises a connector 20, a canister 22, an FTS O-ring 24, and a sensor 26 such as a Negative Temperature Coefficient (NTC) thermistor.
  • NTC Negative Temperature Coefficient
  • the known TP regulator 5 as illustrated in detail in Figure 4, comprises a spring 60, a regulator plug 62, an end of which acts as a seat for the spring 60, a TP Regulator O-ring 64 surrounding the plug 62, and a piston 66.
  • the TP Regulator 5 is fitted into a TP Regulator bore 18 ( Figures 2 and 4) provided in a housing 107 (indicated on Figure 2) of the fuel pump 102, and the FTS 8 is fitted into a separate FTS bore 19 ( Figures 2 and 3) in a front plate 109 (indicated on Figure 2) of the fuel pump 102.
  • Each has an allocated link drill to allow being in contact with the fuel and performing their functions.
  • a complex assembly line is thereby required for assembly of the separate components of the known TP regulator and FTS assemblies.
  • the requirement for a separate bores and link drills for the TP Regulator and the FTS doubles the risk of creation of debris during machining and/or assembly; such debris could cause malfunction or failure of the fuel pump.
  • the risk of external leaks is also increased by having two external components, and by having two separate O-rings.
  • the present invention provides, in a first aspect, a fuel pump according to claim 1.
  • a protrusion of the fuel temperature sensor part may be located within a void above the Transfer Pressure Regulator part, such that the protrusion acts as a plug for the Transfer Pressure Regulator part.
  • the present invention also comprises a fuel pump comprising a subassembly according to any one of the previous claims, wherein the subassembly is located within a bore of the fuel pump, and wherein the fuel temperature sensor measures temperature of fuel at an inlet of the fuel pump.
  • the present invention further comprises fuel pump system comprising a fuel pump as above.
  • Figure 5 is an isometric view of a fuel pump in accordance with the present invention.
  • Figure 6 is a cross-sectional view of a subassembly of the fuel pump of
  • Figure 7 is a schematic illustration of a system including the fuel pump of Figure 5.
  • the present invention comprises a fuel pump 202, comprising a housing 207 and a front plate 209.
  • a subassembly 250 is located in a bore 218 provided in the housing 207.
  • the subassembly 250 as shown by itself in Figure 5, comprises a combined Transfer Pressure Regulator part (TP Regulator part) 105, and a Fuel Temperature Sensor part (FTS part) 108.
  • TP Regulator part 105 and FTS part 108 are both able to maintain the same functionality as the prior art components, within the subassembly 250.
  • the FTS part 108 of the subassembly 250 comprises a connector 120, remote from the TP Regulator part 105, and a sensor 126, such as a Negative Temperature Coefficient (NTC) thermistor.
  • the TP Regulator part 108 comprises a piston 166, and a spring 160.
  • a protrusion 162 of the FTS part 108 is located in a void 168 comprising part of the bore 218 above the TP Regulator part 105; the protrusion acts as a TP Regulator plug.
  • An O-ring 164 surrounds, and is located within an annular groove 174 of, the protrusion 162.
  • FIG. 7 illustrates schematically the fuel pump 202 of the present invention as part of a system 200, i.e. a hydraulic fuel pump circuit.
  • the system 200 comprises a high pressure connector 110 which connects the pump 202 to a rail 111, and a low pressure connector 103, which connects the fuel pump to a fuel tank 101.
  • the fuel pump 202 comprises a subassembly 250 (TP regulator part 105 and FTS part 108), which sets the transfer pressure of the fuel feeding high and low pressure circuits whilst measuring the fuel temperature at the inlet.
  • the subassembly 250 of the present invention is located in a single bore 218 of the fuel pump 202; the bore 218 is equivalent to the bore 18 of the prior art in which only the TP Regulator 5 was located. Therefore in the present invention, there is no requirement for a further, separate bore and link drill(s) for the FTS part 108. Accordingly, the risk of any debris generated during machining leading to failure of the pump is reduced. The risk of external leaks is also reduced, and quality is improved.
  • the present invention is also less costly than the prior art embodiment due to a lower component count, i.e. a further O-ring, and a separate TP Regulator plug, are not required. Having only one O-ring also further reduced the risk of external leaks.
  • NTC FTS sensor

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Subassembly for a fuel pump such as a diesel pump, comprising a combined Transfer Pressure Regulator and fuel temperature sensor; fuel temperature sensor part may be located within a void of the TP regulator part and a protrusion may act as a plug for TP regulator part; a surface towards an end of the protrusion may act as a spring seat for the TP Regulator part; the subassembly providing advantages including being located in a single bore of the pump, reducing risk of debris leading to pump failure and external leaks, reducing component count, machining and assembly time and cost.

Description

Fuel Pump TECHNICAL FIELD
The present invention relates to a fuel pump such as a diesel pump, and more specifically to a Transfer Pressure Regulator and a Fuel Temperature Sensor for a fuel pump.
BACKGROUND OF THE INVENTION
Known fuel pumps systems comprising a fuel transfer pump are usually provided with a regulator, to set the pressure of fuel feeding high and low pressure circuits of the pump, also known as the transfer pressure (TP).
An example of a known fuel pump system 100, i.e. a fuel pump hydraulic circuit, is illustrated schematically in Figure 1 and comprises a fuel pump 102, a high pressure connector 10, which connects the fuel pump 102 to a rail 11, and a low pressure connector 3, which connects the fuel pump 102 to a fuel tank 1.
The fuel pump 102, as illustrated separately in Figure 2, comprises a fuel transfer pump 4, a transfer pressure (TP) regulator 5, which sets the transfer pressure of the fuel feeding the high and low pressure circuits, and a temperature sensor 8, which measure fuel temperature at an inlet.
The known FTS 8, as illustrated in detail in Figure 3, comprises a connector 20, a canister 22, an FTS O-ring 24, and a sensor 26 such as a Negative Temperature Coefficient (NTC) thermistor.
The known TP regulator 5, as illustrated in detail in Figure 4, comprises a spring 60, a regulator plug 62, an end of which acts as a seat for the spring 60, a TP Regulator O-ring 64 surrounding the plug 62, and a piston 66. The TP Regulator 5 is fitted into a TP Regulator bore 18 (Figures 2 and 4) provided in a housing 107 (indicated on Figure 2) of the fuel pump 102, and the FTS 8 is fitted into a separate FTS bore 19 (Figures 2 and 3) in a front plate 109 (indicated on Figure 2) of the fuel pump 102. Each has an allocated link drill to allow being in contact with the fuel and performing their functions.
A complex assembly line is thereby required for assembly of the separate components of the known TP regulator and FTS assemblies.
Furthermore, the requirement for a separate bores and link drills for the TP Regulator and the FTS doubles the risk of creation of debris during machining and/or assembly; such debris could cause malfunction or failure of the fuel pump. The risk of external leaks is also increased by having two external components, and by having two separate O-rings.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an improved fuel pump which at least mitigates the problems as described above. Accordingly the present invention provides, in a first aspect, a fuel pump according to claim 1.
A protrusion of the fuel temperature sensor part may be located within a void above the Transfer Pressure Regulator part, such that the protrusion acts as a plug for the Transfer Pressure Regulator part.
A surface at or towards an end of the protrusion may act as a seat for a spring of the Transfer Pressure Regulator part. The present invention also comprises a fuel pump comprising a subassembly according to any one of the previous claims, wherein the subassembly is located within a bore of the fuel pump, and wherein the fuel temperature sensor measures temperature of fuel at an inlet of the fuel pump.
The present invention further comprises fuel pump system comprising a fuel pump as above.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention is now described by way of example with reference to the accompanying drawings in which: Figure 5 is an isometric view of a fuel pump in accordance with the present invention;
Figure 6 is a cross-sectional view of a subassembly of the fuel pump of
Figure 5; and
Figure 7 is a schematic illustration of a system including the fuel pump of Figure 5.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
An embodiments of the present invention is described below in relation to the orientation of the figures. Terms such as upper, lower, above, below, top, bottom, horizontal and vertical are not intended to be limiting. Referring firstly to Figure 5, the present invention comprises a fuel pump 202, comprising a housing 207 and a front plate 209. A subassembly 250 is located in a bore 218 provided in the housing 207. The subassembly 250, as shown by itself in Figure 5, comprises a combined Transfer Pressure Regulator part (TP Regulator part) 105, and a Fuel Temperature Sensor part (FTS part) 108. The TP Regulator part 105 and FTS part 108 are both able to maintain the same functionality as the prior art components, within the subassembly 250.
The FTS part 108 of the subassembly 250 comprises a connector 120, remote from the TP Regulator part 105, and a sensor 126, such as a Negative Temperature Coefficient (NTC) thermistor. The TP Regulator part 108 comprises a piston 166, and a spring 160.
A protrusion 162 of the FTS part 108 is located in a void 168 comprising part of the bore 218 above the TP Regulator part 105; the protrusion acts as a TP Regulator plug. A surface 172, located at or towards an end 170 of the protrusion 162 remote from the connector 120, acts as a seat for the spring 160 of the TP Regulator part 105. An O-ring 164 surrounds, and is located within an annular groove 174 of, the protrusion 162.
Figure 7 illustrates schematically the fuel pump 202 of the present invention as part of a system 200, i.e. a hydraulic fuel pump circuit. The system 200 comprises a high pressure connector 110 which connects the pump 202 to a rail 111, and a low pressure connector 103, which connects the fuel pump to a fuel tank 101.
The fuel pump 202 comprises a subassembly 250 (TP regulator part 105 and FTS part 108), which sets the transfer pressure of the fuel feeding high and low pressure circuits whilst measuring the fuel temperature at the inlet.
The subassembly 250 of the present invention is located in a single bore 218 of the fuel pump 202; the bore 218 is equivalent to the bore 18 of the prior art in which only the TP Regulator 5 was located. Therefore in the present invention, there is no requirement for a further, separate bore and link drill(s) for the FTS part 108. Accordingly, the risk of any debris generated during machining leading to failure of the pump is reduced. The risk of external leaks is also reduced, and quality is improved.
Furthermore, because a separate bore for the FTS is not required, machining is cheaper and faster than for the prior art embodiment.
During assembly of the fuel pump 202, the fitting of a single subassembly 250, compared to the fitting of a separate TP Regulator 5 and FTS 8, is simpler and faster.
The present invention is also less costly than the prior art embodiment due to a lower component count, i.e. a further O-ring, and a separate TP Regulator plug, are not required. Having only one O-ring also further reduced the risk of external leaks.
REFERENCES
Prior art
fuel tank 1
low pressure connector 3
fuel transfer pump 4
TP Regulator 5
FTS 8
high pressure connector 10
rail 11
TP Regulator bore 18
FTS bore 19
FTS connector 20
FTS canister 22
FTS O-ring 24
FTS sensor 26
TP regulator spring 60
TP regulator plug 62
TP Regulator O-ring 64
TP regulator piston 66
fuel pump system 100
fuel pump 102
fuel pump housing 107
fuel pump front plate 109 Invention
fuel tank 101
low pressure connector 103
fuel transfer pump 104
TP Regulator part 105
Fuel Temperature Sensor part 108
high pressure connector 110
rail 111
(TP regulator part 105 + FTS part 108) bore 218 FTS connector 120
FTS sensor (NTC) 126
FTS spring 160
FTS protrusion 162
O-ring 164
FTS piston 166
TP Regulator void 168
FTS protrusion end 170
FTS protrusion surface 172
FTS protrusion annular groove 174
fuel pump system 200
fuel pump 202
fuel pump housing 207
fuel pump front plate 209
subassembly (TP regulator part + FTS part) 250

Claims

1. A subassembly (250) for a fuel pump (202), comprising a Transfer Pressure Regulator part (105), to regulate a transfer pressure of fuel, and a fuel temperature sensor part (108), comprising a connector (120), and a fuel temperature sensor (126) to measure temperature of fuel,
wherein a protrusion (162) of the fuel temperature sensor part (108) is located within a void (168) above the Transfer Pressure Regulator part (105), such that the protrusion (162) acts as a plug for the Transfer Pressure Regulator part (105).
2. A subassembly (250) as claimed in claim 1, wherein a surface (172) at or towards an end (170) of the protrusion (162) acts as a seat for a spring (160) of the Transfer Pressure Regulator part (105).
3. A fuel pump (202) comprising a subassembly (250) according to any one of the previous claims, wherein the subassembly (250) is located within a bore (118) of the fuel pump (202), and wherein the fuel temperature sensor measures temperature of fuel at an inlet of the fuel pump (202).
4. A fuel pump system (200) comprising a fuel pump (202) according to claim 3.
PCT/EP2016/079510 2015-12-03 2016-12-01 Fuel pump WO2017093442A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1521375.4A GB201521375D0 (en) 2015-12-03 2015-12-03 Fuel pump
GB1521375.4 2015-12-03

Publications (1)

Publication Number Publication Date
WO2017093442A1 true WO2017093442A1 (en) 2017-06-08

Family

ID=55234374

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/079510 WO2017093442A1 (en) 2015-12-03 2016-12-01 Fuel pump

Country Status (2)

Country Link
GB (1) GB201521375D0 (en)
WO (1) WO2017093442A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259351A (en) * 1991-09-07 1993-03-10 Daimler Benz Ag A multiway valve
DE10206236A1 (en) * 2002-02-15 2003-08-28 Bosch Gmbh Robert Fuel injection device for internal combustion engine, has fuel temperature sensor integrated into pressure sensor or fuel metering device
DE102005059829A1 (en) * 2005-12-14 2007-06-21 Siemens Ag Injection system for internal combustion engine has pre-delivery and high pressure pumps with temperature sensor to determine temperature in injection system to adjust volume flow
JP2010196534A (en) * 2009-02-24 2010-09-09 Denso Corp Fuel injection device
EP2719887A1 (en) * 2012-10-12 2014-04-16 Continental Automotive GmbH A fuel injection pump
DE102013210231A1 (en) * 2013-06-03 2014-12-04 Robert Bosch Gmbh High-pressure pump for a fuel injection system and method for determining the fuel temperature in a high-pressure pump

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259351A (en) * 1991-09-07 1993-03-10 Daimler Benz Ag A multiway valve
DE10206236A1 (en) * 2002-02-15 2003-08-28 Bosch Gmbh Robert Fuel injection device for internal combustion engine, has fuel temperature sensor integrated into pressure sensor or fuel metering device
DE102005059829A1 (en) * 2005-12-14 2007-06-21 Siemens Ag Injection system for internal combustion engine has pre-delivery and high pressure pumps with temperature sensor to determine temperature in injection system to adjust volume flow
JP2010196534A (en) * 2009-02-24 2010-09-09 Denso Corp Fuel injection device
EP2719887A1 (en) * 2012-10-12 2014-04-16 Continental Automotive GmbH A fuel injection pump
DE102013210231A1 (en) * 2013-06-03 2014-12-04 Robert Bosch Gmbh High-pressure pump for a fuel injection system and method for determining the fuel temperature in a high-pressure pump

Also Published As

Publication number Publication date
GB201521375D0 (en) 2016-01-20

Similar Documents

Publication Publication Date Title
MX2013010827A (en) Valve apparatus to prevent contamination of fluid in a fluid regulator.
US9803594B2 (en) Fuel supply device
EP2673493B1 (en) Pipe connector and fuel injection system
US20180228058A1 (en) Water cooling system of single board module level
WO2017093442A1 (en) Fuel pump
CN112212013B (en) Flow blocker for discharge valve
CN103644061B (en) A kind of from release without oil return oil sprayer and from the method for modifying of release without oil return oil sprayer
GB2572087A (en) Pressure compensating connector system, downhole assembly, and method
SA517382004B1 (en) Burner for the production of synthesis gas and related cooling circuit
CN205779375U (en) A kind of fuel oil pump assembly and there is its fuel tank assembly and vehicle
CN107255185B (en) A kind of unloading valve mechanical pilot valves
BR112018005197B1 (en) SUBSEA BARRIER FLUID SYSTEM
CN106662060A (en) Fuel injector
BR112022013201A2 (en) FLOW CELL ASSEMBLIES AND RELATED REAGENT SELECTOR VALVES
CN105275579A (en) Expansion water tank used for cooling system
GB2498789A (en) Valve
CN104100429B (en) Fuel system
MY185174A (en) Pressure relief module
US20150343895A1 (en) Fuel supply system
CN205036487U (en) Modular fuel injection equipment and engine
CN106014697A (en) Two-stage pressure reducing type natural gas pressure reducing valve
SG11201805307TA (en) Connection device
CN104047928B (en) A kind of multi-functional pressure fuel tank setting device
CN106460738B (en) For fuel to be transported to the device of internal combustion engine from fuel tank
WO2015095937A8 (en) Electrical connector for motor vehicle fuel pump

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16805791

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16805791

Country of ref document: EP

Kind code of ref document: A1