EP3077655A1 - Drive arrangement for a fuel pump - Google Patents
Drive arrangement for a fuel pumpInfo
- Publication number
- EP3077655A1 EP3077655A1 EP14867277.7A EP14867277A EP3077655A1 EP 3077655 A1 EP3077655 A1 EP 3077655A1 EP 14867277 A EP14867277 A EP 14867277A EP 3077655 A1 EP3077655 A1 EP 3077655A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cogwheel
- fuel pump
- combustion engine
- drive arrangement
- crank shaft
- 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.)
- Withdrawn
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
- F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
- F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
- F02F7/0068—Adaptations for other accessories
-
- 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
- F02M37/04—Feeding by means of driven pumps
- F02M37/06—Feeding by means of driven pumps mechanically driven
Definitions
- the present invention relates to a drive arrangement intended for a fuel pump fitted on a combustion engine, a combustion engine with such a drive arrangement, and a vehicle with such a drive arrangement.
- Combustion engines such as diesel engines or Otto engines, are used in several types of applications and vehicles today, e.g. in heavy goods vehicles such as trucks or buses, passenger cars, motor boats, vessels, ferries or ships. Combustion engines are also used in industrial engines and/or motor powered industrial robots, power plants, such as electric power plants comprising a diesel generator, and in locomotives.
- Combustion engines may be operated with e.g. diesel or petrol. Such engines are equipped with a fuel system to transport fuel from one or several fuel tanks to the combustion engine's injection system.
- the fuel system comprises one or several fuel pumps, which may be driven mechanically by the combustion engine or be driven by an electric motor. The fuel pumps create a fuel flow and pressure to transport the fuel to the combustion engine's injection system, which supplies the fuel to the combustion engine's combustion chamber.
- the injection system suitably comprises a high pressure fuel pump with a pressure accumulator, which high pressure fuel pump is usually operated via a mechanical connection with the combustion engine.
- the mechanical connection may e.g. comprise a cogwheel transmission or a chain transmission.
- the operation of the high pressure fuel pump via the mechanical connection between the combustion engine and the high pressure fuel pump may, due to the component parts, cause noise, which may be experienced as disruptive to the environment. In order to fulfil the noise restrictions applicable within the automotive industry, it is desirable to minimise the noise level in a vehicle to the greatest extent possible. Different methods and systems have been proposed in prior art to operate a fuel pump.
- a transmission device for a combustion engine is displayed, wherein a high pressure fuel pump is operated by the combustion engine's crank shaft by a chain transmission system.
- a drive system which is flexible, but which re- quires a special design of the combustion engine and which has a relatively short life, is achieved for the high pressure fuel pump.
- the objective of the present invention is to achieve a drive arrangement for a fuel pump, which minimises noise levels.
- the objective of the invention is also to achieve a drive arrangement for a fuel pump, which is compact and space-saving.
- Another objective of the invention is to achieve a drive arrangement for a fuel pump, which is robust, hard-wearing and durable, and which has a relatively long life.
- the objectives above are achieved with a drive arrangement intended for a fuel pump fitted on a combustion engine, wherein the drive arrangement comprises a first cogwheel arranged on a crank shaft of the combustion engine, and a second cogwheel arranged on a drive shaft of the fuel pump, whereat the crank shaft and the drive shaft are parallel to each other. Furthermore, the first cogwheel and the second cogwheel are arranged in direct engagement with each other.
- the invention also relates to a combustion engine and a vehicle comprising the arrangement described above.
- the drive arrangement is suitably arranged in connection with the combustion engine and the fuel pump.
- the drive arrangement suitably consists of a gear transmission, which transfers power from the combustion engine's crank shaft to the fuel pump's drive shaft, and hence drives the fuel pump.
- first cogwheel and the second cogwheel By arranging the first cogwheel and the second cogwheel in direct engagement with each other, a drive arrangement which minimises noise levels is achieved.
- first and the second cogwheel By arranging the first and the second cogwheel in direct engagement with each other, so that the cogs of the first cogwheel and the cogs of the second cogwheel are in engagement with each other, no intermediate wheels are required between the first and the second cogwheels.
- vibrations arise, caused by variations in the cog loads acting on the cogwheels at engagement, and these vibrations cause noise.
- the cog loads may vary in size, direction and point of impact, and are determined by e.g. the cogwheel's radius, torque and inertia.
- Intermediate wheels are doubly impacted by cog loads, since they are in engagement with at least two cogwheels/intermediate wheels and thus have at least two gear meshes.
- a gear mesh is defined as the direct connection/engagement between two cogwheels/intermediate wheels.
- a fuel pump drive arrangement is achieved, which is robust, hard-wearing and durable and which thus has a relatively long life.
- the fuel pump is preferably a separate unit fitted on the combustion engine.
- a separate fuel pump instead of a fuel pump integrated with the combustion engine, service and maintenance of the fuel pump is facilitated.
- service and maintenance is facilitated by the drive arrangement, since it is easy to dismantle and replace the fuel pump, its drive shaft and the second cogwheel of the drive arrangement.
- a separate/external fuel pump By using a separate/external fuel pump, a flexible and user-friendly drive arrangement intended for a fuel pump is thus achieved.
- the fuel pump's drive shaft, on which the second cogwheel is arranged, and the combustion engine's crank shaft, on which the first cogwheel is arranged, are parallel with each other.
- the drive arrangement according to the present invention entails a noise reduction of between 3-6 dB from the gear transmission, in comparison with prior art constructions with intermediate wheels.
- the first cogwheel preferably has a diameter, which is at least as large as the diameter of the second cogwheel.
- the first cogwheel is larger than the second cogwheel, which entails an up-shift.
- the first cogwheel may be smaller than the second cogwheel.
- the relation- ship between the first cogwheel and the second cogwheel is such that the ratio between the second cogwheel's (the cogwheel on the fuel pump's drive shaft) rotation speed and the first cogwheel's (the cogwheel on the crank shaft) rotation speed is between 0.8-2, more preferably 1 -2.
- a large diameter of the first and the second cogwheels entails that the cog loads acting on the cogwheels, as well as the gap (the clearance of the herringbone teeth) in the gear mesh, may be reduced. Accordingly, a drive arrangement for a fuel pump is achieved, which minimises noise levels.
- x is the distance between two teeth and r is the radius of the cogwheel.
- the angular backlash is preferably smaller than 0.5 degrees and x is preferably smaller than 0.5 mm.
- the formula shows that the larger the cogwheel's radius, the lower angular backlash, and therefore the noise level.
- a larger cogwheel also has a larger inertia and torque, which reduces the cog loads acting on the cogwheel, and the noise levels may therefore be reduced.
- the first cogwheel has a diameter between 1 50-300 mm, preferably 200-260 mm, more preferably 240 mm.
- the second cogwheel has a diameter between 1 50-300 mm, preferably 200-260 mm, more preferably 240 mm.
- a flywheel is arranged in the combustion engine's crank shaft adja- cent to the first cogwheel.
- the flywheel is suitably arranged at the crank shaft's rear edge.
- the flywheel is also in connection with a gearbox, a generator or a pump in the vehicle.
- the first cogwheel, and thus the second cogwheel are suitably arranged adjacent to the flywheel at the crank shaft's rear edge.
- the flywheel's inertia entails that the crank shaft is more flexible in its front edge than in its rear edge.
- the first cogwheel is arranged on the crank shaft adjacent to the flywheel at the rear edge of the crank shaft, than when the first cogwheel is arranged at the front edge of the crank shaft.
- Adjacent means that the second cogwheel is arranged within a distance of up to approximately 800 mm from the flywheel, seen along the crank shaft's elongation.
- at least one intermediate wheel is arranged in connection with the first cogwheel.
- the at least one intermediate wheel is suitably also arranged in connection with a third cogwheel on a camshaft of the combustion engine.
- the at least one intermediate wheel is suitably arranged in direct engagement with the first cogwheel and the third cogwheel.
- the first cogwheel is arranged on the combustion engine's crank shaft. Furthermore, a first intermediate wheel is suitably arranged in direct engagement with the first cogwheel, which intermediate wheel also is in direct engagement with a second intermediate wheel. The second intermediate wheel is suitably arranged in direct engagement with a third intermediate wheel, which third intermediate wheel also is in direct engagement with a third and a fourth cogwheel. The third cogwheel is suitably arranged on a first camshaft of the combustion engine, and the fourth cogwheel is arranged on a second camshaft of the combustion engine. In this manner, the combustion engine's crank shaft drives both the fuel pump and both camshafts.
- the second cogwheel arranged in the fuel pump is only in engagement with the first cogwheel.
- the fuel pump connected with the combustion engine is preferably a high pressure pump.
- a drive arrangement is provided, which is intended for a fuel pump fitted on a combustion engine, wherein the combustion engine is preferably a diesel engine.
- Fig. 1 shows a schematic side view of a vehicle, comprising a drive arrangement intended for a fuel pump fitted in a combustion engine according to one embodiment of the present invention
- Fig. 2 shows a fuel pump fitted in a combustion engine.
- Fig. 3a shows a side view of a drive arrangement according to one em- bodiment of the present invention
- Fig. 3b shows the drive arrangement according to Fig. 3a seen straight from the rear in the vehicle's driving direction.
- Fig. 4 schematically shows a view of a drive arrangement according to an embodiment of the present invention.
- Fig. 1 shows a schematic side view of a vehicle 1 , which comprises a drive arrangement 2 for a fuel pump 20, connected with a combustion engine 4 according to the present invention.
- the combustion engine 4 is connected to a gearbox 8, which is connected to the driving wheels 10 of the vehicle 1 via a transmission.
- the vehicle also comprises a chassis 12.
- Fig. 2 shows a combustion engine 4 with a crank shaft 26.
- a fuel pump 20 is fitted on the combustion engine 4.
- the fuel pump is thus a separate unit, which has been fitted on the combustion engine 4.
- the fuel pump 20 is operated with a drive arrangement 2, which is described in further detail in Figs. 3a and 3b.
- Fig. 3a shows a drive arrangement 2, intended for a fuel pump 20 fitted in a combustion engine 4 according to one embodiment of the present invention.
- the fuel pump 20 is a high pressure pump, which supplies fuel at a high pressure to the combustion engine's cylinders (not displayed).
- the combustion engine 4 comprises a crank shaft 26, on which a first cogwheel 24 is arranged.
- a drive shaft 22 with a second cogwheel 34 is arranged at the fuel pump 20.
- the fuel pump 20 is arranged adjacent to the crank shaft 26 of the combustion engine 4, which crank shaft 26 extends in parallel with the drive shaft 22 of the fuel pump 20.
- the crank shaft 26 has a front end 28 and a rear end 30, wherein a flywheel 32 is arranged at the rear end 30.
- the first cogwheel 24 is arranged adjacent to the flywheel 32 on the crank shaft 26.
- the distance between the flywheel 32 and the first cogwheel 24 is in this embodiment example 600 mm, seen along the crank shaft's 26 elongation.
- the first cogwheel 24 of the crank shaft 26 and the second cogwheel 34 of the drive shaft 22 of the fuel pump 20 are arranged in direct engagement with each other, so that the teeth of the first cogwheel 24 (not displayed) and the teeth of the second cogwheel 34 (not displayed) are in engagement with each other. In this manner, the fuel pump 20 is driven directly by the crank shaft 26 of the combustion engine via the first cogwheel 24.
- the drive arrangement 2 comprises a reduced number of cogwheels, the number of gear meshes between the fuel pump 20 and the crank shaft 26 is minimised, and the noise level is thus minimised.
- the inertia of the flywheel 32 entails that the rear end 30 of the crank shaft 26 is more stable than the front end 28.
- the first cogwheel 24 and the second cogwheel 34 are of the same size/diameter, which means that the ratio between the first cogwheel's rotation speed and the second cogwheel's rotation speed is 1 .0, i.e. a gearing of 1 :1 . Since the first cogwheel 24 is at least as large as the second cogwheel 34 in the present invention, the cog loads are reduced and the gap in the gear meshes is minimised. Accordingly, the noise levels caused by the drive arrangement 2 are minimised. A smaller number of larger wheels also entails a robust and durable construction.
- Figure 3a also shows an intermediate wheel 36 arranged in direct engagement with, on the one hand, the first cogwheel 24 and, on the other hand, a third cogwheel 38 of a camshaft 40 in the combustion engine 4.
- the camshaft 40 extends in parallel with the crank shaft 26. Accordingly, the camshaft 40 is driven by the crank shaft 26, via the first cog- wheel 24 and the intermediate wheel 36.
- Fig. 3b shows the drive arrangement 2 according to Fig. 3a seen in a view straight from the rear in the driving direction of the vehicle 1 .
- Fig. 4 schematically shows a drive arrangement 2, intended for a fuel pump 20 according to an embodiment of the present invention.
- the drive arrangement 2 comprises a first cogwheel 24 arranged on the crank shaft 26 (not displayed) of the combustion engine 4 and a second cogwheel 34 arranged on the drive shaft 22 (not displayed) of the fuel pump 20.
- the first cogwheel 24 and the second cogwheel 34 are arranged in direct engagement with each other.
- a first intermediate wheel 50 is arranged in engagement with the first cogwheel 24.
- a second intermediate wheel 52 is arranged in engagement with the first intermediate wheel 50 and a third intermediate wheel 54.
- the third intermediate wheel 54 is in turn also arranged in engagement with a third cogwheel 56, ar- ranged on a first camshaft (not displayed), and a fourth cogwheel 58 arranged on a second camshaft (not displayed).
- the number of intermediate wheels connected to the first cogwheel may e.g. be any number.
- the first cogwheel may be as large as the second cogwheel, or larger than the second cogwheel, wherein the ratio between the second cogwheel's (the cogwheel of the fuel pump's drive shaft) rotation speed and the first cogwheel's (the cog- wheel on the crank shaft) rotation speed is between 0.8-2, more preferably 1 - 2.
- Plain bearings or some other form of bearings may be arranged at the cogwheels and/or intermediate wheels for further noise reduction.
- the fuel pump may be fitted on e.g.
- the combustion engine may be of a horizontal or vertical model.
- the vehicle in which the drive arrangement may be arranged may e.g. be a heavy goods vehicle, such as a bus or a truck.
- the vehicle in which the drive arrangement may be arranged may e.g. be a boat.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1351448A SE539242C2 (en) | 2013-12-05 | 2013-12-05 | Drive arrangement for a fuel pump |
PCT/SE2014/051417 WO2015084233A1 (en) | 2013-12-05 | 2014-11-28 | Drive arrangement for a fuel pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3077655A1 true EP3077655A1 (en) | 2016-10-12 |
EP3077655A4 EP3077655A4 (en) | 2017-08-02 |
Family
ID=53273836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14867277.7A Withdrawn EP3077655A4 (en) | 2013-12-05 | 2014-11-28 | Drive arrangement for a fuel pump |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3077655A4 (en) |
KR (1) | KR20160093696A (en) |
SE (1) | SE539242C2 (en) |
WO (1) | WO2015084233A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105909437B (en) * | 2016-05-06 | 2018-11-23 | 潍柴动力扬州柴油机有限责任公司 | A kind of fuel pump transmission device and the fuel injection system equipped with the device |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1067424A (en) * | 1912-07-06 | 1913-07-15 | Lawrence C Hamke | Fuel-pump for internal-combustion engines. |
JPS63314359A (en) * | 1987-06-17 | 1988-12-22 | Kubota Ltd | Fuel injection pump mounting device for diesel engine |
US5184582A (en) * | 1987-12-01 | 1993-02-09 | Yamaha Hatsudoki Kabushiki Kaisha | Engine unit for vehicle |
DE19529368C1 (en) * | 1995-08-10 | 1996-10-31 | Dolmar Gmbh | Fuel injection and lubricant feed system for combustion engine |
JP4124717B2 (en) * | 2003-10-28 | 2008-07-23 | ヤンマー株式会社 | Diesel engine reverse rotation prevention mechanism |
WO2006081829A1 (en) * | 2005-02-02 | 2006-08-10 | Man Diesel A/S | A large two-stroke diesel engine with hydraulically actuated exhaust gas valves |
EP2088308A1 (en) * | 2008-02-08 | 2009-08-12 | Perkins Engines Company Limited | Releaseably positioning two rotatable elements relative to each other |
JP2009203937A (en) * | 2008-02-28 | 2009-09-10 | Honda Motor Co Ltd | Timing transmission mechanism in engine |
DE102009001462A1 (en) * | 2009-03-11 | 2010-09-16 | Robert Bosch Gmbh | Internal combustion engine comprises high pressure injection pump with cam- or eccentric shaft, which is indirectly connected with crankshaft by gear |
JP2011163252A (en) * | 2010-02-12 | 2011-08-25 | Honda Motor Co Ltd | Engine |
-
2013
- 2013-12-05 SE SE1351448A patent/SE539242C2/en unknown
-
2014
- 2014-11-28 KR KR1020167017799A patent/KR20160093696A/en not_active Application Discontinuation
- 2014-11-28 WO PCT/SE2014/051417 patent/WO2015084233A1/en active Application Filing
- 2014-11-28 EP EP14867277.7A patent/EP3077655A4/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
EP3077655A4 (en) | 2017-08-02 |
SE1351448A1 (en) | 2015-06-06 |
SE539242C2 (en) | 2017-05-30 |
KR20160093696A (en) | 2016-08-08 |
WO2015084233A1 (en) | 2015-06-11 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20160705 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: JOHNSON, PETTER Inventor name: FORS, STEFAN Inventor name: JOENSSON, OLA |
|
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20170705 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F02M 39/02 20060101AFI20170629BHEP Ipc: F02M 37/06 20060101ALI20170629BHEP Ipc: F02B 67/04 20060101ALI20170629BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20180201 |