CN107489572A - Integrated high pressure fuel feeding oil pump - Google Patents
Integrated high pressure fuel feeding oil pump Download PDFInfo
- Publication number
- CN107489572A CN107489572A CN201710644016.XA CN201710644016A CN107489572A CN 107489572 A CN107489572 A CN 107489572A CN 201710644016 A CN201710644016 A CN 201710644016A CN 107489572 A CN107489572 A CN 107489572A
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- Prior art keywords
- oil
- fuel
- valve
- high pressure
- pump
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- 239000000446 fuel Substances 0.000 title claims abstract description 161
- 239000003921 oil Substances 0.000 claims abstract description 170
- 239000000295 fuel oil Substances 0.000 claims abstract description 33
- 238000002347 injection Methods 0.000 claims abstract description 28
- 239000007924 injection Substances 0.000 claims abstract description 28
- 230000008676 import Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000004891 communication Methods 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 238000005461 lubrication Methods 0.000 description 7
- 230000007812 deficiency Effects 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 6
- 239000010721 machine oil Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 239000003502 gasoline Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241001075561 Fioria Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- 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
- F02M59/48—Assembling; Disassembling; Replacing
-
- 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
- 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
-
- 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
- F02M59/462—Delivery valves
Abstract
Integrated high pressure fuel feeding oil pump disclosed by the invention, it is desirable to provide a kind of compact-sized, small volume, simple system, installing space is small, and reliability is high, pressure stability, the low oil pump of fault rate, the technical scheme is that：Fuel metering valve homonymy is close to oil-feed valve module, coaxial communication is located at the plunger cavity above the pump housing, spill valve is located at the overflow valve fuel feed hole of bottom with it by the cantilever on pump housing sidepiece vertical plane and connected, low-voltage fuel import is connected by overflow valve fuel feed hole, and diametrically connects low-voltage fuel oil return opening；When opening valve port, low-voltage fuel enters from the low-voltage fuel import on pump housing cantilever, flows through fuel metering valve, oil-feed valve module is directly entered plunger cavity, the descending oil-absorbing process for completing oil pump of plunger；Fuel oil is compressed to form high pressure in plunger cavity when plunger is up, and oil-feed valve module is closed, and unidirectional oil outlet valve component is opened, and high pressure fuel flows out by high pressure fuel outlet, completes the Fuel injection system of oil pump.
Description
Technical field
The present invention is on fuel injection system for IC engine technical field, is related to one kind and is applied to diesel oil and the work of kerosene heavy oil
The high-pressure oil feed device of fuel delivery is carried out on piston engine.
Background technology
High pressure co-rail electric control fuel injection system mainly by ECU, high-pressure oil pump, common rail pipe, electric-controlled fuel injector and
Various sensors etc. form.Low-pressure fuel pump will be extracted out in fuel from fuel tank and be input to high-pressure oil pump.The effect of high-pressure oil pump is
Enough high pressure fuel of the diesel engine when running well is supplied, while ensures that diesel engine starts rapidly required extra fuel feeding
Amount and pressure requirements.Common rail oil pump is the heart of common rail system.The part crucial as one, its effect is in fuel system
Produce high pressure.To reduce discharge, improving engine performance, oil pump is a part that processing is fine, manufacturing process is complicated, a lot
When, during use, it is uneven that fuel feeding occurs in oil pump.Do not washed clean clearly in the oil duct of oil pump, when cleannes are poor, post
It is even stuck to fill in easy clamping stagnation.In addition, high-pressure oil pipe joint is because of frequent vibration or tightens and fuel blow not enough easily occurs.The lighter supplies
Oil mass is reduced, each oil supply cylinder amount is uneven, the delay of fuel feeding time started；Severe one fuel feeding interruption is even unable to fuel feeding.Modern diesel engine
Employ a kind of technology for claiming " common rail ".Common-rail technology refers in the closed-loop system of high-pressure oil pump, pressure sensor and ECU compositions
By the generation and course of injection of spraying pressure a kind of fuel system completely separate from each other, high pressure fuel is conveyed by high-pressure oil pump
To common feeder line, by being realized to the oil pressure in common feeder line.High pressure common rail fuel injection system used in the country at present
Mainly by the companies such as Bosch, Delphi provide, mainly by high-pressure oil pump, oily rail, high-pressure oil pipe, atomizer, various sensors,
ECU etc. is formed.Diesel engine proposes the high-pressure oil pump provided using Bosch, Delphi, and the oil pump is used fan leaf type oil transportation
The form that pump is formed integrally with high-pressure oil pump.Oil pump is driven using belt, and maximum pressure is up to 1800bar.Diesel engine and gasoline
Machine lights fuel mixture difference, and diesel engine is heated by the way that air inlet is compressed, then is mixed with diesel spray, thus a set of row it
Effective fuel injection system is very crucial for diesel engine.Because the compression ratio of diesel engine is big (with regular price gasoline 10-11
Compression ratio compare, 16.7) compression ratio of GW4D20 diesel engines has reached, the pressure in cylinder is very big, to be formed uniform
Mist of oil, very high injection pressure is also just needed, and the diesel engine of main flow is then automatically controlled high-pressure common rail injection now, passes through high pressure
Oil pump pressurizes, and ECU collection sensor signals, controls the nozzle of provided with electromagnetic valve to change oil spout opportunity and distributive value, realizes that fuel oil sprays
The accurate control penetrated.High pressure common rail fuel injection system operation principle is usually that oil transfer pump pumps up fuel from fuel tank, by entering
Oil pipe enters high-pressure pump.By a cleaner for carrying water-oil separating, after oil transfer pump will filter by fuel filter
Fuel pump is drawn onto in pump chamber, and oil transfer pump makes throttle orifice of the fuel oil through relief valve, into the lubrication and cooling circuit of high-pressure pump.Cam
Axle makes the plunger of 3 pumps be moved up and down according to the profile of cam.When charge oil pressure exceedes the Opening pressure (50- of inlet valve
When 150kPa), fuel oil enters plunger cavity through high-pressure oil pump inlet valve and compressed, and the rise of oil pressure once reaches high pressure oil rail
Oil pressure, delivery valve are opened, and the fuel oil compressed has been put into cycle of higher pressure.After delivery stroke terminates, the plunger of high-pressure pump is just
(oil suction stroke) is moved downward, when plunger is by lower dead center, plunger cavity pressure reduces, and delivery valve is closed, when in plunger cavity
Pressure is less than the charge oil pressure of oil transfer pump again when, inlet valve is opened again, and oil-absorbing process starts again.The rise of oil pressure makes delivery valve
Open, when reaching common rail pressure, the fuel oil compressed has been put into cycle of higher pressure oil circuit.Plunger continues to supply fuel oil, until reaching
After delivery stroke top dead centre, pressure reduces, and causes delivery valve to be closed, and the fuel pressure still in plunger cavity also declines therewith,
Plunger (pump oil plug) moves downward again.As long as the pressure in plunger cavity is brought down below the charge oil pressure of oil feed pump, inlet valve is again
Open, pump oil process starts again.
Conventional diesel common rail system high pressure oil pump, the fabricated structure form shown in generally use Fig. 6, using pump box 41 as
The assembling installation foundation part of oil pump, one or more pump units are vertically mounted on pump box upper end, fuel metering valve 4 and overflow valve group
Part 5 is arranged on the side of pump box 41；Camshaft 36 is horizontally arranged in the hole of fore bearing 31 and rear bearing 40, and thrust plate 30 prevents
Camshaft 36 shifts forward；Oil pump is connected the side of drive end bearing bracket 29 of pump box 41 with engine gear case by installing terminal pad 32
Connect, remaining position is in vacant state.Low-voltage fuel enters combustion by the oil inlet on pump box 41 by fuel oil oil input channel 45
The front end of oil measurement valve 4, when fuel metering valve 4 is connected to the open command of external ECU ECU, low-voltage fuel flows into fuel oil
Metering valve 4, and low-voltage fuel road 34 is entered by pump box internal chiasma oil duct；When plunger 8 is descending, oil-feed valve module 14 is beaten
Open, low-voltage fuel enters plunger cavity；When plunger 8 is up, fuel oil is compressed to form high pressure in plunger cavity, and oil-feed valve module 14 closes
Close, unidirectional oil outlet valve component 13 is opened, and high pressure fuel completes oil pump feed process by the outflow of high pressure fuel outlet 48.
Each pump unit is by the pump housing 1, plunger 8, plunger spring 9, tappet assembly 10, unidirectional oil outlet valve component 13, oil-feed
Valve module 14 is formed by combining,
Above-mentioned traditional common rail system high pressure oil pump major defect and it is disadvantageous in that：
1) it is bulky.As a result of bulky fabricated structure form, it is impossible to installed in the restricted requirement in space
On engine equal power device；
2) card edge type is unable in engine cylinder-body, and high-pressure oil pump suspension is arranged on engine gear outdoor, shakes
It is dynamic larger, easily there is installation bolt fracture, wire harness patches the reliability quality problems such as unstable；
3) number of parts of high-pressure fuel injection pump assembly part is more, system complex, and reliability is relatively difficult to ensure card；
4) the internal low-voltage oil duct of high-pressure fuel injection pump assembly is longer, and low pressure volume is big, and low pressure oil is full of required when oil pump works first
Time is longer, in high-pressure oil pump plunger cavity fuel oil establish high pressure time it is slower, the foundation of corresponding oily rail initial fuel pressure
It is just slower；
5) connection of high-pressure oil pump internal low-voltage oil circuit is complicated, and oil circuit is longer, and the cleannes of oil duct are not easy to ensure, high pressure easily occur
The failure that fuel feed pump plunger is stuck and can not worked, also it is easily caused oil pump rear end fuel injector and Block failure occurs.
6) from plunger cavity farther out, when fuel metering valve is opened, fuel oil flow to the time phase of plunger cavity position to fuel metering valve
Should be longer, it is slow that inlet valve distal end is opened, plunger oil suction and fuel pressure establish it is slower, at the beginning of fuel delivery oil supply rail between
It is later, oily rail pressure power less stable；
7) high-pressure fuel injection pump assembly part quality is big, it is impossible to meets the lightweight requirements of engine, vehicle, whole set equipment.
8) high-pressure fuel injection pump assembly part is complicated, and the seal interface of fuel oil and machine oil is more, easily produces leakage failure；Together
When the phenomenon that machine oil and diesel oil are mutually altered by seal interface is likely to occur inside oil pump.
9) use splash lubrication mode between tappet roller and roller pin, cam of injection pump rotating speed ultrahigh speed (2000r/min with
On) in the case of, easily heating abrasion.
The content of the invention
The purpose of the present invention is in place of above-mentioned the shortcomings of the prior art, there is provided a kind of compact-sized, small volume,
Simple system, installing space is small, and reliability is high, and pressure stability, fault rate is low, and the good integrated high pressure of oily rail pressure stability supplies
Oil pump, with overcome existing traditional common rail system high pressure oil pump is bulky, quality is big, system complex, reliability are low, installation by
The deficiency of limit.
The present invention solves integrated high pressure fuel feeding oil pump used by traditional common rail system high pressure oil pump technical problem, bag
Include：The high pressure fuel pipe joint 2 of the upper end of the pump housing 1 is axially screwed onto, connects the high pressure fuel outlet on high pressure fuel pipe joint 2
48, the unidirectional oil outlet valve component 13 of plunger cavity passage is connected, is vertically connected firmly in the high pressure fuel outlet section upper lateral part face cantilever of the pump housing 1
Fuel metering valve 4 and spill valve 5 on body, and around plunger 8, installed in the lower surface of the pump housing 1 and tappet assembly 10 it
Between plunger spring 9, it is characterised in that：Assembling installation foundation part using the pump housing 1 as whole high-pressure oil pump, fuel metering valve 4
For homonymy close to oil-feed valve module 14, coaxial communication is located at the plunger cavity of the top of the pump housing 1, and spill valve 5 is hung down by the sidepiece of the pump housing 1
The cantilever faced directly is located at the overflow valve fuel feed hole 17 of bottom with it and connected, and connecting low pressure by overflow valve fuel feed hole 17 fires
Oil inlet 3, and diametrically connect low-voltage fuel oil return opening 6；When fuel metering valve 4 is connected to the unlatching of external ECU ECU
Valve port is opened during instruction, low-voltage fuel enters from the low-voltage fuel import 3 on the cantilever of the pump housing 1, flows through fuel metering valve 4, enters
Oil valve assembly 14 is directly entered plunger cavity, when plunger 8 is descending, completes the oil-absorbing process of oil pump；When plunger 8 is up, fuel oil is in post
Plug intracavitary is compressed to form high pressure, and oil-feed valve module 14 is closed, and unidirectional oil outlet valve component 13 is opened, and high pressure fuel passes through high compression ignition
Oil export 48 flows out, and completes the Fuel injection system of oil pump.
The present invention has the advantages that compared to prior art：
1) compact-sized, small volume, simple system, installing space are small.Assembling of the present invention using the pump housing 1 as whole high-pressure oil pump
Installation foundation part, the parts such as fuel metering valve 4, spill valve 5 are installed directly on the pump housing 1 of oil pump, will be by the pump housing 1, post
Plug 8, plunger spring 9, tappet assembly 10, unidirectional oil outlet valve component 13, the pump unit that oil-feed valve module 14 is formed by combining are carried out
Integral type connection composition high-pressure oil pump, the number of parts of high-pressure fuel injection pump assembly part is few, simple system, and reliability is easier to ensure.It is whole
Body structure is more compact reliable, can bear higher operating pressure.Small volume, installing space is small, and it is limited to may be mounted at space
Make on desired engine equal power device.The high-pressure oil pump quality of composition is small, can meet engine, vehicle, whole set equipment
Lightweight and low burn oil consumption requirement.Avoid that prior art high-pressure fuel injection pump assembly part quality is big, number of parts is more, structure is multiple
For miscellaneous, reliability compared with the deficiency for being difficult to ensure card, solving prior art high-pressure fuel injection pump assembly can not meet that engine, vehicle, complete machine are set
The deficiency of standby lightweight requirements.
2) reliability is high.The positioning cylindrical surface 49 and tappet assembly 10 of the pump housing 1 of the present invention are inserted into engine cylinder-body
In mounting hole, the middle bench face 50 of the pump housing 1 is bonded with engine cylinder-body mounting surface 51, and pump housing bottom cylinder is matched somebody with somebody with mounting hole
Close, it is ensured that the pump housing 1 is connected (see Fig. 4) with engine reliable；Integrated high pressure fuel feeding oil pump of the present invention, which can be inserted directly into, to be arranged on
In the mounting hole of engine cylinder-body, without carrying out suspension installation outside engine gear case, vibrations are smaller, avoid and show
Have that technology high-pressure fuel injection pump assembly easily produces installation bolt fracture, wire harness patches the deficiencies of the reliability quality problems such as unstable.
Tappet oil oilhole 18 is provided with tappet 27, lubricating oil flows into roller 24 by the roller hole rounding 26 or chamfering on roller
Oil film and effectively lubricating (see Fig. 5) are formed in small gap between roller pin 25, can be in cam of injection pump axle ultrahigh speed
Used in the case of (more than 2000r/min), solve prior art high-pressure fuel injection pump assembly in cam of injection pump rotating speed ultrahigh speed feelings
The defects of easily heating is worn under condition.
3) fault rate is low.The present invention uses outside oil-feed and oil return circuit to be directly connected with oil circuit interface on the pump housing, interior
The connection of portion's low pressure oil way is simple, and oil circuit is shorter, and the cleannes of oil duct are easily guaranteed that, avoids prior art high-pressure fuel injection pump assembly
Easily occur that oil pump itself plunger is stuck and the deficiency of oil pump rear end fuel injector Block failure.Oil pump itself part connects to be formed at 3
Fuel sealing interface, fuel metering valve 4, spill valve 5 and high pressure fuel pipe joint 2 form high pressure after being installed on the pump housing 1
Oil pump fuel sealing interface；Oil pump is formed at seal oil interface 1 (see Fig. 2, Fig. 3, figure when being installed on engine cylinder-body
4).Integrated high pressure fuel feeding oil pump seal interface of the present invention is few, solves that prior art high-pressure fuel injection pump assembly is complicated, fuel oil
And seal interface more the defects of easily producing leakage failure of machine oil, while can avoid occurring machine oil inside oil pump leading to diesel oil
Cross the deficiency that seal interface is mutually altered.
4) oil pressure is established fast, and oily rail pressure stability is good.The present invention is using the homonymy of fuel metering valve 4 close to oil-feed valve module
14 coaxial communications are located at the plunger cavity of the top of the pump housing 1；Installation is inlayed inside the pump housing 1 to be arranged close to the homonymy of fuel metering valve 4
Oil-feed valve module 14, low-voltage fuel enters from low-voltage fuel import 3 on the pump housing 1, successively by fuel metering valve 4, inlet valve
Component 14 is directly entered plunger cavity, and low pressure volume is small, and the internal low-voltage oil duct of high-pressure oil pump is shorter, and centre is without oil duct or short oil
Road, (see Fig. 2).Low pressure oil is shorter full of required time when oil pump works first, and fuel metering valve 4 is nearer from plunger cavity, fuel oil
When metering valve 4 is opened, fuel oil can rapidly flow to plunger cavity position, and fuel pressure is established and supply is very fast to the time of oily rail, oil
Rail pressure power builds pressure soon and stability is good；Solve prior art fuel metering valve 4 from plunger cavity farther out, internal low-voltage oil duct compared with
Long, low pressure volume is big, plunger oil suction and fuel pressure establish it is slower, at the beginning of fuel delivery oil supply rail between later, oily rail pressure
Power builds the problem of slow pressure and less stable.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the outline structural diagram of integrated high pressure fuel feeding oil pump of the present invention.
Fig. 2 is Fig. 1 sectional view.
Fig. 3 is Fig. 1 partial sectional view.
Fig. 4 is Fig. 1 and the partial schematic sectional view of engine cylinder-body installation.
Fig. 5 is partial enlarged drawing at Fig. 4 I.
Fig. 6 is conventional diesel common rail system high pressure oil pump structure figure and its partial schematic diagram.
In figure：1 pump housing, 2 high pressure fuel pipe joints, 3 low-voltage fuel imports, 4 fuel metering valves, 5 spill valves, 6 is low
Compression ignition oil oil return opening, 7 oil pump mounting holes, 8 plungers, 9 plunger springs, 10 tappet assemblies, 11 seal interface A, 12 seal interface B,
13 unidirectional oil outlet valve components, 14 oil-feed valve modules, 15 seal interface C, 16 seal interface D, 17 overflow valve fuel feed holes, 18 tappets profit
Lubrication hole, 19 engine lubrication oilholes, 20 engine tappet holes, 21 oil pump for engine fixing holes, 22 oil pump installation bolts, 23 hairs
Motivation cam of injection pump, 24 rollers, 25 roller pins, 26 roller hole roundings, 27 tappets, 28 seal interface E, 29 drive end bearing brackets, 30 thrusts
Piece, 31 fore bearings, 32 installation terminal pads, 33 seal interface F, 34 low-voltage fuel roads, 35 fuel feed holes, 36 camshafts, 37 oil sealings, 38
Seal interface G, 39 rear end caps, bearing after 40,41 pump boxs, 42 oil pump machine oil imports, 43 pump unit back oil roads, 44 fuel oil roads are deflated
Valve, 45 fuel oil oil input channels, 46 overflow valve back oil roads, 47 engine cylinder-bodies, 48 high pressure fuels export, 49 positioning cylindrical surfaces, in 50
Portion's step surface, 51 engine cylinder-body mounting surfaces.
Embodiment
Refering to Fig. 1-Fig. 3.Integrated high pressure fuel feeding oil pump, including：Axially it is screwed onto the injection line of the upper end of the pump housing 1
Joint 2, the high pressure fuel outlet 48 on high pressure fuel pipe joint 2 is connected, connects the unidirectional oil outlet valve component 13 of plunger cavity passage,
Fuel metering valve 4 and spill valve 5 on the high pressure fuel outlet section upper lateral part face cantilever of the pump housing 1 vertically are connected firmly, and
Around plunger 8, the plunger spring 9 between the lower surface of the pump housing 1 and tappet assembly 10.Whole hydraulic oil is used as using the pump housing 1
The assembling installation foundation part of pump, for the homonymy of fuel metering valve 4 close to oil-feed valve module 14, coaxial communication is located at the post of the top of the pump housing 1
Chamber is filled in, spill valve 5 is located at the overflow valve fuel feed hole 17 of bottom with it by the cantilever on the sidepiece vertical plane of the pump housing 1 and connected
It is logical, low-voltage fuel import 3 is connected by overflow valve fuel feed hole 17, and diametrically connect low-voltage fuel oil return opening 6；When fuel oil meter
Amount valve 4 opens valve port when being connected to the open command of external ECU ECU, low-voltage fuel fires from the low pressure on the cantilever of the pump housing 1
Oil inlet 3 enters, and flows through fuel metering valve 4, oil-feed valve module 14 is directly entered plunger cavity, when plunger 8 is descending, completes oil pump
Oil-absorbing process；When plunger 8 is up, fuel oil is compressed to form high pressure in plunger cavity, and oil-feed valve module 14 is closed, unidirectional delivery valve
Component 13 is opened, and high pressure fuel flows out by high pressure fuel outlet 48, completes the Fuel injection system of oil pump.
Fuel metering valve 4 is also referred to as fuel metering unit.Fuel metering valve 4, spill valve 5 are assemblied in the pump housing 1 simultaneously
On the cantilever of body, it may be mounted in the mounting hole on the cantilever sidepiece vertical plane of the pump housing 1, also may be mounted at the top of the pump housing 1
In horizontal plane or the mounting hole of any inclined plane position.
In addition to high pressure fuel outlet 48, low-voltage fuel import 3, low-voltage fuel oil return opening 6 are set along hangs in the body of the pump housing 1
On sidepiece vertical plane or top levels on arm body, any inclined plane position for may also be arranged on the body cantilever of the pump housing 1
On.
Oil-feed valve module 14 can use interference fit or screw threads for fastening connected mode, be embedded on the cantilever of the pump housing 1 and install
Close to the position of plunger cavity side wall in hole.Oil-feed valve module 14 can be arranged with fuel metering valve 4 with coaxial line, can also be used
Diameter parallel or intersecting angle mode, centre are arranged close to without oil duct or short oil road, homonymy.
In order to prevent fuel oil from being leaked at the seal interface B 12 that high pressure fuel pipe joint 2 is formed on the pump housing 1, Yi Jifang
Only fuel oil leaks at the seal interface C 15 that fuel metering valve 4 is formed on the pump housing 1, in the top mounting holes of the pump housing 1 and high pressure
Sealing ring is provided with seal interface between fuel oil pipe connector 2, in the cantilever body side surface mounting hole of the pump housing 1 and fuel metering valve 4
Between seal interface at be provided with sealing ring, also can use interference fit fastening means be sealed.In order to prevent fuel oil from
Spill valve 5 is arranged at the seal interface D 16 formed on the pump housing 1 and leaked, in the cantilever upper mounting holes of the pump housing 1 with overflowing
Sealing ring is provided with seal interface between stream valve module 5 to be sealed, and can also use interference fit fastening means to carry out close
Envelope.
The overflow valve fuel feed hole 17 for setting straight line to connect between fuel metering valve 4 and spill valve 5.
Refering to Fig. 4 and Fig. 5.Bottom positioning cylindrical surface 49 on the pump housing 1, insertion, which is arranged on engine cylinder-body 47, starts
In lubricating oil pump fixing hole 21.Matched somebody with somebody between positioning cylindrical surface 49 and oil pump for engine fixing hole 21 using interference fits or small―gap suture
Conjunction mode；The middle bench face 50 of the pump housing 1 is bonded with engine cylinder-body mounting surface 51, and oil pump is passed through using oil pump installation bolt 22
Mounting hole 7 is fastenedly connected, it is ensured that the pump housing is connected with engine reliable.In order to prevent lubricating oil is arranged on from the pump housing 1 from starting
Leaked at the seal interface A 11 formed on machine cylinder body 47, the bottom positioning cylindrical surface 49 on the pump housing 1 is consolidated with oil pump for engine
Sealing ring is provided with the seal interface for determining to be formed between hole 21 to be sealed, and can also use interference fit fastening means to carry out close
Envelope.
The 27 cylindrical face of cylinder of tappet on tappet assembly 10 is that engine tappet hole 20 is formed with engine Lower mounting hole
Small―gap suture coordinates, during tappet assembly 10 moves linearly up and down along axis, when the face of tappet oil oilhole 18 on tappet 27
During engine lubrication oilhole 19, the lubricating oil with pressure will be flowed into tappet oil oilhole 18 from engine lubrication oilhole 19,
After outflow of lubrication oil tappet oil oilhole 18, parts of lubricating oil flows into roller by the roller hole rounding 26 on roller 24 or chamfering
Form oil film and effectively lubricating in small gap between 24 and roller pin 25, remaining lubricating oil flows through roller 24 and roller pin 25
Play cooling effect in outer surface.
The external cylindrical surface of roller 24 on tappet assembly 10 contacts with the cam type surface of oil pump for engine cam 23, engine oil
Pump cam 23 can be rotated by during outside moment loading around own axes, in the driving force and plunger spring of oil pump for engine cam 23
Under 9 compression force, tappet assembly 10 and plunger 8 can up and down reciprocatingly move along a straight line.
Claims (10)
1. integrated high pressure fuel feeding oil pump, including：Axially it is screwed onto the high pressure fuel pipe joint (2) of the pump housing (1) upper end, connection
High pressure fuel outlet (48) on high pressure fuel pipe joint (2), the unidirectional oil outlet valve component (13) of plunger cavity passage is connected, vertically
Fuel metering valve (4) and spill valve (5) on the cantilever of the pump housing (1) high pressure fuel outlet section upper lateral part face are connected firmly, with
And around plunger (8), the plunger spring (9) between the pump housing (1) lower surface and tappet assembly (10), it is characterised in that：
Assembling installation foundation part using the pump housing (1) as whole high-pressure oil pump, fuel metering valve (4) homonymy is close to oil-feed valve module
(14), coaxial communication is located at the plunger cavity above the pump housing (1), and spill valve (5) passes through outstanding on the pump housing (1) sidepiece vertical plane
Arm body is located at the overflow valve fuel feed hole (17) of bottom with it and connected, and low-voltage fuel import is connected by overflow valve fuel feed hole (17)
(3) low-voltage fuel oil return opening (6) is connected, and diametrically；When fuel metering valve (4) is connected to the unlatching of external ECU ECU
Valve port is opened during instruction, low-voltage fuel enters from the low-voltage fuel import (3) on the pump housing (1) cantilever, flows through fuel metering valve
(4), oil-feed valve module (14) is directly entered plunger cavity, when plunger (8) is descending, completes the oil-absorbing process of oil pump；Plunger (8) is up
When, fuel oil is compressed to form high pressure in plunger cavity, and oil-feed valve module (14) is closed, and unidirectional oil outlet valve component (13) is opened, high
Compression ignition oil flows out by high pressure fuel outlet (48), completes the Fuel injection system of oil pump.
2. integrated high pressure fuel feeding oil pump as claimed in claim 1, it is characterised in that：Fuel metering valve (4), spill valve
(5) while it is assemblied on the cantilever of the pump housing (1) body, or the mounting hole being assemblied on the pump housing (1) cantilever sidepiece vertical plane
In.
3. integrated high pressure fuel feeding oil pump as claimed in claim 1, it is characterised in that：Fuel metering valve (4), spill valve
(5) it is assemblied in the top levels of the pump housing (1) or the mounting hole of any inclined plane position.
4. integrated high pressure fuel feeding oil pump as claimed in claim 1, it is characterised in that：It is low in addition to high pressure fuel exports (48)
Compression ignition oil inlet (3), low-voltage fuel oil return opening (6) are set along sidepiece vertical plane or top on the pump housing (1) body cantilever
On portion's horizontal plane, or on any inclined plane position being arranged on the pump housing (1) body cantilever.
5. integrated high pressure fuel feeding oil pump as claimed in claim 1, it is characterised in that：Oil-feed valve module (14) is embedded in the pump housing
(1) close to the position of plunger cavity side wall in cantilever upper installing hole.
6. integrated high pressure fuel feeding oil pump as claimed in claim 1, it is characterised in that：Oil-feed valve module (14) and fuel metering
Valve (4) coaxial line is arranged, or uses diameter parallel or intersecting angle mode, and centre is arranged close to without oil duct or short oil road, homonymy.
7. integrated high pressure fuel feeding oil pump as claimed in claim 1, it is characterised in that：In the pump housing (1) top mounting holes and height
Sealing ring is provided with seal interface between compression ignition oil connection (2).
8. integrated high pressure fuel feeding oil pump as claimed in claim 1, it is characterised in that：Installed in the pump housing (1) cantilever body side surface
Sealing ring is provided with seal interface between hole and fuel metering valve (4), or is sealed using interference fit fastening means.
9. integrated high pressure fuel feeding oil pump as claimed in claim 1, it is characterised in that：Installed on the pump housing (1) cantilever top
Sealing ring is provided with seal interface between hole and spill valve (5), or is sealed using interference fit fastening means.
10. integrated high pressure fuel feeding oil pump as claimed in claim 1, it is characterised in that：In fuel metering valve (4) and overflow valve
The overflow valve fuel feed hole (17) for setting straight line to connect between component (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710644016.XA CN107489572A (en) | 2017-07-31 | 2017-07-31 | Integrated high pressure fuel feeding oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710644016.XA CN107489572A (en) | 2017-07-31 | 2017-07-31 | Integrated high pressure fuel feeding oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107489572A true CN107489572A (en) | 2017-12-19 |
Family
ID=60644878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710644016.XA Pending CN107489572A (en) | 2017-07-31 | 2017-07-31 | Integrated high pressure fuel feeding oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107489572A (en) |
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| CN110657039A (en) * | 2018-06-28 | 2020-01-07 | 联合汽车电子有限公司 | Flameout jitter improvement method |
| CN112761842A (en) * | 2020-12-29 | 2021-05-07 | 余姚市舒春机械有限公司 | Integrated fuel pump of electronic injection diesel engine |
| CN114876687A (en) * | 2022-05-23 | 2022-08-09 | 东风商用车有限公司 | Leakage drainage device for high-pressure oil pump |
| CN115234418A (en) * | 2022-06-17 | 2022-10-25 | 中国民航大学 | Horizontal opposed two-stroke aero-engine oil pump driving mechanism for burning negative carbon fuel |
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| CN114876687B (en) * | 2022-05-23 | 2023-11-03 | 东风商用车有限公司 | Leakage drainage device of high-pressure oil pump |
| CN115234418A (en) * | 2022-06-17 | 2022-10-25 | 中国民航大学 | Horizontal opposed two-stroke aero-engine oil pump driving mechanism for burning negative carbon fuel |
| CN115234418B (en) * | 2022-06-17 | 2023-09-26 | 中国民航大学 | Oil pump driving mechanism of horizontally opposed two-stroke aeroengine for burning negative carbon fuel |
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Application publication date: 20171219 |
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