CN205559135U - It provides automatically controlled monoblock pump of low pressure fuel feeding inner loop to need not petroleum pump - Google Patents
It provides automatically controlled monoblock pump of low pressure fuel feeding inner loop to need not petroleum pump Download PDFInfo
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- CN205559135U CN205559135U CN201620116628.2U CN201620116628U CN205559135U CN 205559135 U CN205559135 U CN 205559135U CN 201620116628 U CN201620116628 U CN 201620116628U CN 205559135 U CN205559135 U CN 205559135U
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Abstract
The utility model discloses an it provides the automatically controlled monoblock pump of low pressure oil circuit inner loop to need not the petroleum pump, and aiming at providing one kind, to advance oil flow more abundant, and the pressure after the compression is higher, need not install the automatically controlled monoblock pump of petroleum pump additional. The utility model discloses a following technical scheme realizes: in the plunger subassembly, plunger upper portion system has the necking down body, and axle head system has the plunger end to taper hole and intercommunication the blind hole oil circuit passageway to the taper hole is held to the plunger, and the plunger end is equipped with the check valve ball sealer bottom the taper hole, and the plunger is held to make to the inboard mouth end of taper hole has the backstop groove and the horizontal bar of definite plunger end to the taper hole aperture of assembling the jump ring, and blind hole oil circuit passageway lower part system has symmetrical the central axis, and the axial misplaces and communicates the radial hole in necking down annulus line of rabbet joint crack to a newly -increased oil circuit passageway of a plunger oil absorption stroke has been formed, the oil feed passageway that newly -increased oil circuit passageway and clearance between the prior art valve rod and the pump body got into the plunger chamber has constituted plunger oil absorption stroke intercommunication pump body radial hole's the interior circulating oil path of binary channels low pressure oil together.
Description
Technical field
The utility model type relates to a kind of electronically controlled unit pump providing low pressure oil supply without oil transfer pump for high pressure fuel injection.
Background technology
For using the engine of monoblock pump type electric control fuel oil jet system, monoblock pump is contained in the cylinder block of diesel engine generally as global facility, the oil spray injection cam on distribution cam axle drive.Electronically controlled unit pump system is the fuel system with high injection pressure that a kind of magnetic valve overflow time controls formula, not only has distributive value and the most controlled operating characteristic of injection timing, and has higher expulsion pressure and good functional reliability.During electronically controlled unit pump work, first the volume exercising plunger cavity under plunger increases, now magnetic valve is in opening, the low pressure oil having more than the 0.3Mpa that oil transfer pump provides enters in plunger cavity from the opened gap of magnetic valve, until plunger goes downwards to lower dead center oil-feed process and terminates, this process is referred to as oil-feed process.And then driving lower plunger to start up at fuel oil injection cam, make the volume reducing of plunger cavity, the part fuel oil in plunger cavity is expressed into low pressure chamber via the opened gap of magnetic valve valve rod by plunger.Once solenoid valves, valve rod closedown, the fuel oil in plunger cavity flows into the passage of low pressure chamber and is cut off immediately, and in plunger cavity, remaining fuel oil will be by Fast Compression, and pressure raises rapidly.When the fuel pressure in plunger cavity reaches the expulsion pressure of fuel injector, fuel injector i.e. commencement of fuel injection.High-pressure oil pipe is connected between monoblock pump and fuel injector, emitted dose and the fuel injection characteristic of fuel injector are affected by high-pressure oil pipe fuel pressure, the fluctuation of high-pressure oil pipe fuel pressure is then that the air pocket formed in oil-absorbing process by plunger cavity compressive failure when plunger is up is caused, and the supply capability of the formation of air pocket and low pressure oil way exists much relations.Electronically controlled unit pump itself is to collect mechanical, electrical, magnetic, the complication system of liquid various procedures, plunger cavity fuel pressure is the coupling result of the oil transfer pump of low pressure oil way, the monoblock pump of high-pressure oil passage, high-pressure oil pipe three, if the low pressure oil transfer pump being connected with monoblock pump, that both high-pressure oil passages mate is improper, can affect the operating that whole monoblock pump fuel injection system is reliable and stable.But owing to the aperture of the magnetic valve valve rod of electronically controlled unit pump is less, it is ensured that pressure when fuel oil is flowed by the gap of magnetic valve valve rod cannot be below air and separates pressure, to ensure that the fuel oil in plunger cavity does not produce air pocket.Prior art electronically controlled unit pump structure is the critical component of fuel oil supply system.Mainly it is made up of parts such as unit pump body, tappet, electromagnetic valve component, tappet pin, plunger, the plunger cavity of the pump housing, spring base, return spring, delivery valve, oil outlet valve spring, delivery valve seat, delivery valve clamping nuts.Electronically controlled unit pump is arranged on engine cylinder-body, the fuel oil injection cam on the distribution cam axle of engine drive, and when cam is up, drives tappet compression plunger spring to make plunger upwards dead-centre motion.When cam is descending, plunger spring discharges, by the downward dead-centre motion of plunger spring plunger.Cam rotates continuously and makes plunger do reciprocating linear motion.In the case of cold, magnetic valve is opened.Its operation principle is as follows: fuel oil is transported in plunger cavity via the opened gap of magnetic valve valve rod during top dead centre rotates to generating circle by cam by oil transfer pump, and when rotating to base circle position, plunger is positioned at lower dead center, and oil-feed process terminates.Camshaft continues to rotate, when cam is during basic circle rotates to top dead centre, and cam makes plunger move upward by tappet, makes the volume reducing of plunger cavity, fuel oil in plunger cavity is compressed, and the part fuel oil in plunger cavity is expressed into low pressure chamber via the opened gap of magnetic valve valve rod by plunger.After solenoid valves closedown, the fuel oil in high pressure chest produces high pressure under ram compression.High pressure fuel transmits in high-pressure oil pipe and arrives fuel injector, when pressure reaches the unlatching pressure of fuel injector, fuel injector commencement of fuel injection.When magnetic valve is again turned on, high pressure fuel is overflowed by the gap of magnetic valve, flows to low pressure chamber, and fuel injector stops injection, completes a circulation.Plunger cavity fuel pressure can reflect the characteristic of fuel delivery of low pressure oil way, it is not difficult to find out, in a complete working cycles, oil transfer pump is key point to the fuel feeding of plunger cavity, the oil transfer pump oil pressure that goes out under rated engine speed is generally about 0.3-1MPa, without oil transfer pump, the fuel feeding of plunger cavity would not be sufficient, cavitation will necessarily be produced in plunger cavity, thus will make the fuel oil bubble in plunger cavity that explosion occurs in compression process, and then cause the shake of pump end fuel pressure acutely, fuel system job insecurity.The deficiencies in the prior art are, because the opening of magnetic valve valve rod is the least, only about 0.15mm, if the gap of the 0.15mm depended merely between valve rod and the pump housing (1) can not meet the pressure requirement higher than air separating pressure of fuel oil, bubble will necessarily be produced in plunger cavity, so that course of injection fuel pressure occurs strong shake, cause engine job stability to be substantially reduced, even can not work.Without oil transfer pump fuel feeding, necessarily forming the highest vacuum in plunger cavity, pressure when causing fuel oil to flow through the gap of magnetic valve valve rod and in plunger cavity is less than air separating pressure so that the air being dissolved in fuel oil separates out in a large number.Make engine job insecurity.Therefore need to install an oil transfer pump additional between fuel tank and monoblock pump.Owing to prior art engine does not has oil transfer pump when using machinery high-pressure oil pump, the most do not drive interface and the parts of oil transfer pump.
The upgrading of engine must use again electronically controlled unit pump to replace traditional mechanical high-pressure oil pump.Electronically controlled unit pump cannot be used without oil transfer pump, if installing an oil transfer pump additional to not only increase the cost of engine, also need to change the original structure of engine simultaneously, and increase driving means and the interface of the oil transfer pump more expensive than oil transfer pump, the most greatly add cost, make reliability reduce simultaneously.
Utility model content
The purpose of this utility model is the weak point existed for prior art, it is provided that a kind of oil-feed flow is more abundant, and the pressure after compression is higher, and can reduce cost, and reliability is higher, is not required to install additional the electronically controlled unit pump of oil transfer pump.
nullThe utility model solves its technical problem and be the technical scheme is that a kind of without the electronically controlled unit pump of circulation in oil transfer pump offer low pressure oil way，Including: the pump housing 1 and plunger assembly thereof，It is characterized in that: in plunger assembly，Plunger 29 top being mounted concentrically in the cavity volume of pump housing center, pump housing center is shaped with necking down body 291，Axle head is shaped with a up big and down small plunger end to taper hole 293 and the asphalt channel connecting the described plunger end blind hole asphalt channel 294 to taper hole，Plunger end is provided with check valve ball sealer 28 bottom taper hole，Plunger end side port end in taper hole 293 is shaped with the backstop groove of assembling jump ring 27，Backstop groove center is provided with one and determines that check valve ball sealer 28 and plunger end are to the horizontal bar of taper hole aperture，Blind hole asphalt channel bottom is shaped with center axis of symmetry，Two radial direction through hole 292 up and down in axile displacement connection necking down body annular groove gap，Thus define a newly-increased asphalt channel of a plunger oil suction stroke；Newly-increased asphalt channel and fuel oil are via pump housing inclined hole 102, it is transported to Plunger oil paths by the opened gap of valve rod position block 26 conical surface, enter the oil inlet passage of pump housing center cavity volume together, constitute circulating oil path in the binary channels low pressure oil of plunger oil suction stroke connection pump housing radial direction through hole 101.
The utility model has the advantages that compared to prior art.
Oil-feed flow is more abundant, and the pressure after compression is higher.nullThe necking down body valve rod position block 291 valve rod position block that the utility model is made on plunger valve rod position block 29 valve rod position block top，The plunger end that axle head is equipped with to taper hole with connect described plunger end to taper hole，And the necking down body valve rod position block 291 valve rod position block of plunger valve rod position block 29 valve rod position block middle and upper part and the necking down body valve rod position block 291 valve rod position block radial direction through hole valve rod position block 292 valve rod position block that misplaces the most up and down can make to increase another passage in the oil suction stroke of plunger，Make monoblock pump oil inlet passage in addition to original magnetic valve valve lever clearance can be with oil-feed，Add again the dislocation radial direction through hole valve rod position block 292 valve rod position block the most up and down being connected necking down body cannelure and necking down body by the horizontal oilhole valve rod position block 101 valve rod position block on the pump housing、Necking down body taper hole、The oil inlet passage of ball sealer，Such that it is able to make the oil-filled more abundant of monoblock pump plunger cavity，Avoid the problem appearance separating pressure less than air that the fuel pressure in plunger occurs，It can be avoided that occur that cavitation problems enables the engine to steady operation.
Reduce cost.The passage using the utility model to increase in the oil suction stroke of plunger, remains to get the fuel oil meeting expulsion pressure requirement under conditions of not having oil transfer pump, meets the requirement of engine.Therefore need not install an oil transfer pump again additional, because original engine does not has oil transfer pump when using machinery high-pressure oil pump, the most do not drive interface and the parts of oil transfer pump.If oil transfer pump must be increased in the upgrading of engine and increases driver part and the interface of even more expensive than oil transfer pump itself oil transfer pump, but also the structure of engine redesigned and to necessarily increase cost.Therefore use the electronically controlled unit pump system without oil transfer pump offer low pressure oil supply of the present utility model to be possible not only to the most cost-effective, and the structure of otherwise designed engine can be avoided.
Reliability is higher, is not required to install oil transfer pump additional.The passage that the utility model increases in the oil suction stroke of plunger, it is not necessary to install oil transfer pump again additional to provide the electronically controlled unit pump system of low pressure oil supply, because without installing oil transfer pump additional, the most there is not the integrity problem of oil transfer pump driving means.And overcome prior art oil transfer pump driving means and limited by engine structure, part problem many, baroque, make reliability be improved.
Accompanying drawing explanation
Fig. 1 is of the present utility model a kind of without the organigram of the electronically controlled unit pump of circulation in oil transfer pump offer low pressure oil way.
nullIn figure: 1 pump housing，2 glands，3 screws，4 armature，5 electromagnet springs，6 electromagnet spring bases，7 electromagnet adjusting pads，8 valve rods，9 pump housing overcoats，10 first sealing rings，11 second sealing rings，12 plunger springs，13 plunger spring seats，14 tappets，15 rollers，16 tappet pins，17 camshafts，18 screws，19 pressing plates，20 sealing rings，21 sealing rings，22 oil transfer pumps，23 fuel tanks，24 check valves，25 electromagnet，26 valve rod position blocks，27 jump rings,28 check valve ball sealers，29 plungers，30 valve rod position blocks，101 pump housing radial direction through hole，102 pump housing inclined holes，103 pump housing center cavity volumes，261 valve rod cavity volumes，291 plunger necking down bodies，292 plunger radial through holes，293 plunger end are to taper hole，294 blind hole asphalt channels，901 pump housing overcoat oilholes，902 pump housing overcoat center cavity volumes,903 drainback passages.
Detailed description of the invention
Refering to Fig. 1.nullIn embodiment described below，A kind of electronically controlled unit pump system without circulating in oil transfer pump offer low pressure oil way includes: valve rod position block and plunger assembly thereof，Valve rod position block is concentrically mounted in the center cavity volume valve rod position block 902 valve rod position block of pump housing overcoat valve rod position block 9 valve rod position block，Position, valve rod position block middle and lower part has one or more to increase the pump housing radial direction through hole valve rod position block 101 valve rod position block of oil inlet quantity，The center cavity volume valve rod position block 902 valve rod position block of pump housing radial direction through hole valve rod position block 101 valve rod position block UNICOM，Make fuel oil can pass through pump housing radial direction through hole valve rod position block 101 valve rod position block、Plunger radial through hole valve rod position block 292 valve rod position block、Plunger necking down body 291 enters in plunger centre bore.The side of valve rod position block is also shaped with a Ge Shi center cavity volume valve rod position block 902 valve rod position block and the pump housing inclined hole valve rod position block 102 valve rod position block communicated at the tapered opening of the right-hand member of valve rod valve rod position block 8 valve rod position block, and pump housing inclined hole valve rod position block 102 valve rod position block enables the fuel oil of center cavity volume valve rod position block 902 valve rod position block to enter in the valve rod cavity volume valve rod position block 261 valve rod position block of magnetic valve.Valve rod position block bottom chamfer cylinder is shaped with at least two cannelure, is equipped with and is sealed in the first sealing ring 10 valve rod position block, the second sealing ring 11 that pump housing overcoat valve rod position block 9 valve rod position block center cavity volume valve rod position block 902 valve rod position block coordinates with valve rod position block cylindrical and is sealed in sealing ring 21 valve rod position block on valve rod position block shaft shoulder step surface in described cannelure.
nullAssembling electromagnet valve rod position block 25 valve rod position block and the cuboid of valve rod valve rod position block 8 valve rod position block it is shaped with on valve rod position block top，Electromagnet valve rod position block 25 valve rod position block and valve rod valve rod position block 8 valve rod position block are respectively assembled in the pilot hole at two ends, left and right of described cuboid respectively，The valve rod valve rod position block 8 valve rod position block being integrally connected with valve rod position block 26 is radially across oil inlet passage、Electromagnet spring 5 and armature 4 connect electromagnet valve rod position block 25 valve rod position block with one heart，The valve rod cavity volume 261 being positioned at cuboid right-hand member assembling valve rod position block 26 is shaped with taper chamfering，The valve rod position block 26 of the connected one of valve rod valve rod position block 8 valve rod position block，The switch of valve body is completed by the conical surface that coordinates of valve rod cavity volume 261 pilot hole end toper chamfering.Valve rod valve rod valve rod position block valve rod position block 26 valve rod position block is concentrically mounted on the right-hand member in valve rod position block central upper portion radial direction through hole cavity volume, in order to limit the stroke of valve rod valve rod position block 8 valve rod position block, valve rod valve rod valve rod position block valve rod position block 26 valve rod position block screw valve rod position block 18 valve rod position block is pressed in the ladder plane of valve rod position block by pressing plate valve rod position block 19 valve rod position block, sealing ring 20 valve rod position block is arranged between groove and the radial direction through hole face of cylinder of valve rod position block in the middle part of valve rod position block valve rod position block 30 valve rod position block in order to ensure sealing.Electromagnet valve rod position block 25 valve rod position block is assemblied in the left end pilot hole of valve rod position block cuboid, is fixed in the counterbore plane of valve rod position block by gland valve rod position block 2 valve rod position block, screw valve rod position block 3 valve rod position block and electromagnet adjusting pad valve rod position block 7 valve rod position block.Left end and the armature valve rod position block 4 valve rod position block of electromagnet valve rod position block 25 valve rod position block concentric fits at valve rod 8, the end face of electromagnet valve rod position block 25 valve rod position block and the end face of armature valve rod position block 4 valve rod position block is made to leave a distance, electromagnet spring base valve rod position block 6 valve rod position block is pressed between electromagnet adjusting pad valve rod position block 7 valve rod position block and the ladder plane being arranged on valve rod position block with one heart, electromagnet spring valve rod position block 5 valve rod position block is supported between electromagnet spring base valve rod position block 6 valve rod position block and the shoulder of valve rod valve rod position block 8 valve rod position block.
The lower surface of necking down body in running downwards with plane contact on the plunger spring of assembling on plunger spring seat valve bar position block 13 valve rod position block.Plunger valve rod position block 29 valve rod position block lower end plane is positioned at the boss plane at tappet valve rod position block 14 valve rod position block center by the contact of plunger spring seat valve bar position block 13 valve rod position block.The lower plane of plunger spring seat valve bar position block 13 valve rod position block is seated in tappet valve rod position block 14 valve rod position block with one heart and sink in the plane of counterbore inner chamber.The arc groove being assembled roller valve rod position block 15 valve rod position block by tappet pin valve rod position block 16 it is shaped with in the bottom of tappet valve rod position block 14 valve rod position block.The curved surface of camshaft valve rod position block 17 valve rod position block contacts with roller valve rod position block 15 valve rod position block, when camshaft valve rod position block 17 valve rod position block turns round in the direction of arrows, and can be up with pushing rolling wheels.Plunger spring valve rod position block 12 valve rod position block is supported between the lower plane of valve rod position block and the planar annular of plunger spring seat valve bar position block 13 valve rod position block, roller can be made to press close to the curved surface of camshaft valve rod position block 17 valve rod position block, plunger spring valve rod position block 12 valve rod position block is supported between the lower plane of valve rod position block and the planar annular of plunger spring seat valve bar position block 13 valve rod position block, and roller can be made to press close to the curved surface of camshaft valve rod position block 17 valve rod position block.The side of pump housing overcoat valve rod position block 9 valve rod position block is shaped with the drainback passage valve rod position block 903 valve rod position block by check valve valve rod position block 24 valve rod position block UNICOM fuel tank valve rod position block 23 valve rod position block and communicates drainback passage 901 with fuel tank valve rod position block 23 valve rod position block, when high to one limit set of the fuel pressure in the cavity volume valve rod position block 902 valve rod position block of pump housing overcoat center, check valve valve rod position block 24 valve rod position block is opened, fuel oil flows in fuel tank valve rod position block 23 valve rod position block.
The pump housing 1 being arranged in the cavity volume of center, with gland 2, electromagnet 25 is fixed in the lateral step hole that the pump housing 1 upper end is made, during energising, electromagnet is used for driving valve rod 8, valve rod is made to close with the pump housing 1 laminating, made valve rod be in the state opened by the release of the electromagnet spring 5 of concentric fits after power-off, when the valve rod 8 being shaped with necking down is closed valve rod position block 26 and valve stem end by the gap of 0.15mm in order to determine the stroke of valve rod.The inclined hole 102 of the pump housing 1 is connected with the annular housing 261 at valve rod position block 26 place, enables the fuel oil in pump housing overcoat 9 cavity volume to be connected with inclined hole 102, annular housing 261, defines an oil-filled passage, and this passage is the oil-filled passage of prior art.
nullThe oil-filled passage newly increased includes: plunger 29 is contained in the center cavity volume of the pump housing 1，It is shaped with necking down body 291 on plunger part and can connect the through hole 101 of the pump housing，Radial direction at described plunger necking down body is shaped with and is symmetrical in central axis，The radial direction through hole 292 in axile displacement connection necking down body annular groove gap，Described plunger axle head be shaped with a up big and down small plunger end to taper hole with connect the described plunger end blind hole asphalt channel 294 to taper hole 293，Plunger end is provided with check valve ball sealer 28 bottom taper hole，Jump ring 27 is assembled in the plunger end backstop groove that side port end is shaped with in taper hole 293，One end of described jump ring 27 is shaped with horizontal bar in order to determine that ball sealer 28 and plunger end have the aperture of more than 1mm between taper hole，The fuel oil in pump housing overcoat 9 center cavity volume 902 can be made via through hole 101、Through hole 292、Blind hole asphalt channel 294、Plunger end communicates to taper hole 293，Between taper hole 293, there is the aperture of more than 1mm at ball sealer 28 and end after ball sealer lifts，Thus define a newly-increased asphalt channel of plunger oil suction stroke.
0.15mm gap is had in order to determine the stroke of valve rod between valve rod 8 and position block 26 with necking down.When plunger is descending, pump housing center reduces with the cavity volume of plunger, pressure drop as little as atmospheric pressure is once, occur in that certain vacuum, ball sealer 28 will be lifted, and to taper hole 293, ball sealer 28 and end, to have the aperture of more than 1mm to be formed the oil-filled passage newly increased between taper hole 293 oil-filled via through hole 101, through hole 292, blind hole 294, plunger end for the fuel oil in the center cavity volume 902 of pump housing overcoat 9.Meanwhile monoblock pump can also utilize original passage oil-feed, i.e. fuel oil in pump housing overcoat 9 cavity volume remains to be connected by inclined hole 102, annular housing 261, between valve rod 8 and the pump housing 1, the gap of 0.15mm is oil-filled, and two oil inlet passages have been come together Oil feeding process.
nullWhen camshaft presses the revolution of direction shown in figure，By roller valve rod position block 15 valve rod position block、Tappet valve rod position block 14 valve rod position block promotes plunger valve rod position block 29 valve rod position block to move upward，Pressure in the center cavity volume that now valve rod position block and plunger valve rod position block 29 valve rod position block are constituted increased，After electromagnet valve rod position block 25 valve rod position block is energized, armature valve rod position block 4 valve rod position block overcomes the spring force band ovable valve stem valve rod position block 8 valve rod position block of electromagnet spring valve rod position block 5 valve rod position block to make the conical surface of valve rod valve rod position block 8 valve rod position block close to taper hole face with the plunger end of valve rod position block to left movement，Owing to leakage passage will be risen rapidly by valve rod valve rod position block 8 valve rod position block closing presure，Until being raised to required pressure，When electromagnet valve rod position block 25 valve rod position block power-off，The leakage passage of valve rod valve rod position block 8 valve rod position block is opened，High pressure fuel is flowed back in the cavity volume of valve rod position block and the formation of pump housing overcoat valve rod position block 9 valve rod position block by the inclined hole valve rod position block 102 valve rod position block of valve rod position block，Pulse wave pressure for increasing suddenly then passes through check valve valve rod position block 24 valve rod position block earial drainage oil return box，Till plunger valve rod position block 29 valve rod position block moves to peak，After the peak of the curved surface running to camshaft valve rod position block 17 valve rod position block when roller valve rod position block 15 valve rod position block, plunger spring valve rod position block 12 valve rod position block will press against plunger valve rod position block 29 valve rod position block and move downward，Certain vacuum is formed in the cavity volume of pump housing center，Now valve rod has already turned on，Make fuel from fuel tank valve rod position block 23 valve rod position block via receiving oil pump valve rod position block 22 valve rod position block under the effect of oil transfer pump valve rod position block 22 valve rod position block、Pump chamber oilhole valve rod position block 901 valve rod position block、The cavity volume that valve rod position block is formed with pump housing overcoat valve rod position block 9 valve rod position block、Pump housing inclined hole valve rod position block 102 valve rod position block、The conical surface gap of valve rod valve rod position block 8 valve rod position block and valve rod position block enters in the center cavity volume of valve rod position block and plunger valve rod position block 29 valve rod position block composition.
Claims (9)
- null1. the electronically controlled unit pump circulated in providing low pressure oil way without oil transfer pump，Including: the pump housing (1) and plunger assembly thereof，It is characterized in that: in plunger assembly，Plunger (29) top being mounted concentrically in the plunger cavity of pump housing center is shaped with necking down body (291)，Axle head is shaped with a up big and down small plunger end to taper hole (293) and the asphalt channel connecting the described plunger end blind hole asphalt channel (294) to taper hole，Plunger end is provided with check valve ball sealer (28) bottom taper hole，Plunger end side port end in taper hole (293) is shaped with the backstop groove of assembling jump ring (27)，Backstop groove center is provided with one and determines that check valve ball sealer (28) and plunger end are to the horizontal bar of taper hole aperture，Blind hole asphalt channel bottom is shaped with center axis of symmetry，Two radial direction through hole (292) up and down in axile displacement connection necking down body annular groove gap，Thus define a newly-increased asphalt channel of a plunger oil suction stroke；Newly-increased asphalt channel and fuel oil are via pump housing inclined hole (102), it is transported to Plunger oil paths by the opened gap of valve rod position block (26) conical surface, enter the oil inlet passage of plunger cavity together, constitute circulating oil path in the binary channels low pressure oil of plunger oil suction stroke connection pump housing radial direction through hole (101).
- 2. the electronically controlled unit pump circulated in providing low pressure oil way without oil transfer pump as claimed in claim 1, it is characterized in that: the side of the pump housing (1) is also shaped with Ge Shi center cavity volume (902) and the pump housing inclined hole (102) communicated at the tapered opening of the right-hand member of valve rod (8), pump housing inclined hole (102) can make the fuel oil of the valve rod cavity volume (261) of magnetic valve enter in plunger center cavity volume (902).
- 3. the electronically controlled unit pump circulated in providing low pressure oil way without oil transfer pump as claimed in claim 1, it is characterized in that: the pump housing (1) bottom chamfer cylinder is shaped with at least two cannelure, in described cannelure, be equipped with the first sealing ring (10), the second sealing ring (11) and the sealing ring (21) that is sealed on the pump housing (1) shaft shoulder step surface being sealed in pump housing overcoat (9) center cavity volume (902) and coordinating with the pump housing (1) cylindrical.
- 4. the electronically controlled unit pump circulated in providing low pressure oil way without oil transfer pump as claimed in claim 1, it is characterized in that: be shaped with assembling electromagnet (25) and the cuboid of valve rod (8) on the pump housing (1) top, electromagnet (25) and valve rod (8) are respectively assembled in the pilot hole at two ends, left and right of described cuboid, and the valve rod (8) being integrally connected with valve rod position block (26) is connected electromagnet (25) radially across oil inlet passage, electromagnet spring (5) and armature (4) are concentric.
- 5. the electronically controlled unit pump circulated in providing low pressure oil way without oil transfer pump as claimed in claim 1, it is characterized in that: the valve rod cavity volume (261) being positioned at cuboid right-hand member assembling valve rod position block (26) is shaped with taper chamfering, the valve rod position block (26) of the connected one of valve rod (8), completes the switch of valve body by the conical surface that coordinates of valve rod cavity volume (261) pilot hole end toper chamfering.
- 6. as claimed in claim 1 provide the electronically controlled unit pump of circulation in low pressure oil way without oil transfer pump, it is characterised in that: when plunger oil-filled stroke, the fuel oil of the center cavity volume (902) of pump housing overcoat (9) can pass through pump housing radial direction through hole (101), plunger radial through hole (292), blind hole asphalt channel (294), plunger end in gap entrance pump housing center cavity volume (103) between taper hole (293) of taper hole (293), valve ball sealer (28) and plunger end.
- 7. the electronically controlled unit pump circulated in providing low pressure oil way without oil transfer pump as claimed in claim 1, it is characterised in that: plunger radial through hole (292) upper end is connected to taper hole (293) with plunger end,The check valve ball sealer (28) that plunger end is arranged to taper hole (293) bottom, when plunger is up, pressure in pump housing center cavity volume (103) raises, ball sealer (28) is tightly pressed against plunger end on the conical surface of taper hole (293), and fuel oil can not flow back to blind hole asphalt channel (294) from valve ball sealer (28) and plunger end to taper hole (293).
- null8. the electronically controlled unit pump circulated in providing low pressure oil way without oil transfer pump as claimed in claim 1，It is characterized in that: when plunger is descending，The pressure at pump housing center cavity volume (103) reduces，Certain vacuum occurs，Check valve ball sealer (28) lifts，And plunger end forms the gap of at least 1mm between the conical surface of taper hole (293)，The fuel oil from center cavity volume (902) is enable to pass through pump housing radial direction through hole (101)、Plunger radial through hole (292)、Blind hole asphalt channel (294)、Plunger end is to taper hole (293)、Valve ball sealer (28) and the plunger end gap between taper hole (293) enters in pump housing center cavity volume (103)，Add the valve rod (8) of solenoid valves rear drive magnetic valve，Make original oil inlet passage that the gap of 0.15mm between valve rod valve rod (8) and the pump housing (1) is formed，So that monoblock pump can utilize two oil inlet passages next oil-filled when oil-filled.
- 9. the electronically controlled unit pump circulated in providing low pressure oil way without oil transfer pump as claimed in claim 1, it is characterised in that: there is 0.15mm gap in order to determine the stroke of valve rod between valve rod (8) and the position block (26) with circular cone necking down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620116628.2U CN205559135U (en) | 2016-02-05 | 2016-02-05 | It provides automatically controlled monoblock pump of low pressure fuel feeding inner loop to need not petroleum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620116628.2U CN205559135U (en) | 2016-02-05 | 2016-02-05 | It provides automatically controlled monoblock pump of low pressure fuel feeding inner loop to need not petroleum pump |
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| CN205559135U true CN205559135U (en) | 2016-09-07 |
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| CN201620116628.2U Active CN205559135U (en) | 2016-02-05 | 2016-02-05 | It provides automatically controlled monoblock pump of low pressure fuel feeding inner loop to need not petroleum pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587452A (en) * | 2016-02-05 | 2016-05-18 | 成都威特电喷有限责任公司 | Electric unit pump with two-channel low-pressure oil internal circulation oil path |
| CN113898508A (en) * | 2021-08-31 | 2022-01-07 | 东风商用车有限公司 | Control system and method for electric oil delivery pump of diesel engine |
-
2016
- 2016-02-05 CN CN201620116628.2U patent/CN205559135U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587452A (en) * | 2016-02-05 | 2016-05-18 | 成都威特电喷有限责任公司 | Electric unit pump with two-channel low-pressure oil internal circulation oil path |
| CN113898508A (en) * | 2021-08-31 | 2022-01-07 | 东风商用车有限公司 | Control system and method for electric oil delivery pump of diesel engine |
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