CN105736204A - Fully electronically controlled in-line distributor type fuel injection pump assembly - Google Patents
Fully electronically controlled in-line distributor type fuel injection pump assembly Download PDFInfo
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- CN105736204A CN105736204A CN201610060832.1A CN201610060832A CN105736204A CN 105736204 A CN105736204 A CN 105736204A CN 201610060832 A CN201610060832 A CN 201610060832A CN 105736204 A CN105736204 A CN 105736204A
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- Prior art keywords
- oil
- plunger
- oil duct
- fuel
- pump
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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
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
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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
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/02—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements
- F02M41/06—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating
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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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/04—Pumps peculiar thereto
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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
- F02M59/46—Valves
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a fully electronically controlled in-line distributor type fuel injection pump assembly which comprises a pump body and a pump head arranged on the pump body, wherein a cam shaft is arranged in the pump body; a plunger is arranged in the pump head; a high-pressure oil chamber is arranged at the head part of the plunger; the cam shaft comprises a main shaft and a cam arranged on the main shaft; four bulges adopting the same structure are uniformly distributed on the cam; an included angle between the axes of every two bulges is 90 degrees; each bulge comprises a concave arc section, a working section, a transition section and a deceleration section; each adjacent bulge on the cam corresponds to one working cycle of the plunger; the plunger reciprocates up and sown four times as the cam shaft rotates once; and a high-pressure fuel distribution mechanism is arranged on the pump head. The fully electronically controlled in-line distributor type fuel injection pump assembly realizes timed and quantitative control of fuel injection quantity, solves the problem of poor consistency of fuel quantity of a conventional electronically controlled unit pump; and meanwhile the fully electronically controlled in-line distributor type fuel injection pump assembly solves the problem of low pressure at an end of a fully electronically controlled VE pump, and improves the combustion performance of an engine.
Description
Technical field
The present invention relates to a kind of injection pump, particularly relate to a kind of full electronic control injection pump assembly of distribution formula in upright arrangement.
Background technology
Along with country is about the enforcement of three stage non-rice habitats diesel engine automobile tail-gas laws, the requirement containing quantitative limitation of NOx, HC and the CO in exhaust emissions of diesel engine is more and more higher.Injection pump is one of core parts of diesel fuel system, and it is responsible for spraying into high pressure fuel in diesel engine cylinder, and the size of oil spout fuel pressure will directly determine economic indicator and the performance indications of diesel engine.Practice finds, traditional direct combination type multi-cylinder electronic control injection pump assembly can not meet the requirement of modern diesel engine, and in order to meet the needs of diesel emission and burning, electric-controlled type injection pump is widely adopted.It is camshaft, plunger matching parts and delivery valve matching parts that injection pump produces the main parts size of high pressure fuel.
At present, the oil supply system of domestic diesel engine is generally adopted arranged type injection pump, and this injection pump is made up of multiple plunger matching parts, each corresponding cylinder of each plunger matching parts.Demand for the multiple plunger matching parts of satisfied driving, the main shaft of camshaft is provided with multiple cam, one corresponding a set of plunger matching parts of cam, and for improving supply capability, the axial length of camshaft is all longer, this not only adds recruitment cost, and add the installing space of injection pump, reduce the intensity of camshaft；This many cams, multi-plunger couple injection pump structure to there is oil mass concordance poor, the unmanageable problem of distributive value.In addition, enter the process of fuel oil room at high pressure fuel from plunger matching parts, due to fuel oil pressurized, the fuel oil abrasive wear plunger matching parts sharply expanded, the contact point making fuel feed hole causes fuel leakage, charge oil pressure declines, and frequency is unstable, and each oil supply cylinder amount uniformity is poor, oil pressure is inconsistent, the acting of each cylinder not etc., does not add fuel consumption simultaneously, has damaged axle and the bearing shell of diesel engine.Owing to combustibility is bad, make carbon deposit increase, cause temperature to rise, cause the heavy wear of cylinder sleeve, piston, piston ring etc., reduce the service life of plunger matching parts, need after more renewing plunger matching parts to utilize high-pressure oil pump monitor station to test one by one, time-consuming require great effort again.
The cam of existing design convexity wheel shaft is all made up of accelerating sections, changeover portion, reduction of speed section, reverse-running section and basic circle section, and wherein, the main purpose of accelerating sections is that the oil-supply speed of injection pump is brought up to the oil-supply speed designed in advance, then oil spout oil spout.Protrusion type that the accelerating sections of mechanical type fuel injection camshaft is generally adopted or tangent-type are to realize this purpose, although protrusion type or tangent-type can increase the lift of accelerating sections, but the restriction of angle and spring installing space usually because be under pressure, and it is unable to reach target, and the mode of this increase cam lift necessarily causes that the installing space of injection pump strengthens, it is unfavorable for the popularization of product and the versatility of parts.
In addition, when injection pump in existing diesel engine launching system is started working, the fuel oil oil pressure that oil transfer pump flows out is generally about 0.2～0.3MPa, after the low-voltage fuel that oil transfer pump provides enters into the low pressure oil intracavity of injection pump, it is flowed in spill port then through oil duct after the high-voltage oil cavity that low pressure oil pocket is full of its upper end, the input pressure of such high-voltage oil cavity substantially remains in 0.2～0.3MPa, when high engine speeds operates, injection pump there will be the problem that low pressure oil cavity pressure is on the low side, cause that the oil-filled rate of high-voltage oil cavity of its upper end is low, the uniformity of injection pump is typically in 20～30%, performance and the discharge index of electromotor are had a strong impact on.
As can be seen here, prior art awaits further improving.
Summary of the invention
The present invention is the weak point avoiding above-mentioned prior art to exist, provide a kind of full electronic control injection pump assembly of distribution formula in upright arrangement, this injection pump assembly can realize the timing to distributive value, quantitative accurate control, solve current electronically controlled unit pump and there is the problem that oil mass concordance is poor, solve the problem that full electrical control oil spray pump pump end pressure is on the low side at present simultaneously, improve oil spout pump performance.
The technical solution adopted in the present invention is:
nullA kind of full electronic control injection pump assembly of distribution formula in upright arrangement，Including the pump housing and the pump head being arranged on the pump housing，Pump head is provided with low-voltage fuel entrance and low pressure oil pocket，Low-voltage fuel entrance is connected with the oil transfer pump being arranged on outside the pump housing，Camshaft it is provided with in the pump housing，Camshaft be provided above body component of holding out，Plunger it is provided with in pump head，Plunger is positioned at the top of body component of holding out，The head of plunger is provided with high-voltage oil cavity，The quantity of plunger is one，Described camshaft includes main shaft and the cam being arranged on main shaft，The quantity of cam is one，Cam is evenly equipped with four identical projections of structure，The angle of adjacent two protruding axis is 90 °，Each projection all includes concave arc-shaped section、Active section、Changeover portion and reduction of speed section，One cycle of operation of the protruding corresponding plunger of on cam，Camshaft often rotates a circle，Plunger pumps four times，Pump head is additionally provided with high pressure fuel distributor gear.
The front end of described main shaft uniformly offers multiple open slot, and the described pump housing is provided with speed probe, and speed probe is connected with ECU.
Described cam adopts square structure, and the front and back ends of described camshaft is respectively arranged with rolling bearing, and camshaft is connected with the pump housing by rolling bearing.
Described high pressure fuel distributor gear includes electromagnetic valve, distribution set and delivery valve, distribution set and electromagnetic valve lay respectively at the both sides of plunger, electromagnetic valve be arranged below control valve, electromagnetic valve spring it is provided with in electromagnetic valve, it is provided with armature between electromagnetic valve and control valve, the power on/off of electromagnetic valve is controlled by the ECU of automobile, is provided with distributing shaft, distributing shaft offers a plurality of oil duct that can communicate with delivery valve in distribution set.
The rear sleeve of described gear shaft is equipped with driving gear, distributing shaft be arranged below drive plate, drive plate be arranged below travelling gear shaft assembly, travelling gear shaft assembly includes power transmission shaft and is nested with at power transmission shaft bottom and the driven gear suitable with driving gear, the top of drive plate is connected with the bottom of distributing shaft, and the bottom of drive plate is connected with power transmission shaft.
nullThe top of described distribution set offers the first oilhole，The top of distributing shaft offers the ring shaped oil passage being connected with the first oilhole，The middle part of distributing shaft offers the first intersection oil duct communicated with each other and the second intersection oil duct，First intersection oil duct is connected with ring shaped oil passage，The bottom of distribution set is also evenly equipped with four the second oilholes，When distributing shaft rotates，Second intersection oil duct communicates with four the second oilholes or disconnects successively，Delivery valve is provided with and four the second oilholes, four oil-outs one to one，Delivery valve is connected with the fuel injector being arranged on outside the pump housing，Fuel injector passes through fuel passage and engine cylinders，Electromotor includes four cylinders，Fuel injector is provided with and four oil-outs, four oil-ins one to one on delivery valve，Four oil-ins are respectively through four fuel pipes and four cylinders，When the pressure of fuel oil is higher than the unlatching pressure of delivery valve，Fuel oil enters fuel injector through delivery valve，Camshaft often rotates a circle，Four oil-outs difference of delivery valve are fuel-displaced once，Fuel injector four fuel oils of injection are for four cylinders of electromotor.
Described plunger is arranged in plunger bushing, plunger bushing is arranged on pump head, plunger bushing offers the 3rd intersection oil duct and the 4th intersection oil duct, 3rd intersection oil duct and the 4th intersection oil duct all connect with high-voltage oil cavity, pump head is additionally provided with the first high-pressure oil duct and the second high-pressure oil duct, one end of first high-pressure oil duct intersects oil duct and communicates with the above-mentioned 3rd, the other end is connected with above-mentioned first oilhole, second high-pressure oil duct one end intersects oil duct and communicates with the 4th, the other end communicates with controlling valve, control the process that the valve rod in valve moves down is capable of the connection between the second high-pressure oil duct and low pressure oil pocket.
The bottom of described distributing shaft offers leakproof cannelure, the bottom of distribution set offers the oil return oil duct communicated with leakproof cannelure, leakproof cannelure and oil return oil duct are respectively positioned on the lower section of the second oilhole, offering the low pressure oilhole communicated with oil return oil duct on described pump head, low pressure oilhole is connected with low pressure oil pocket.
The border, periphery, middle part of described distribution set offers low pressure annular oil groove.
The upper end of described distributing shaft is provided with the first sealing screw plug, and the upper end of plunger is provided with the second sealing screw plug.
Owing to have employed technique scheme, having the beneficial effect that acquired by the present invention
1, the present invention passes to ECU after gathering tach signal by speed probe, ECU freely controls energising and the power-off of electromagnetic valve according to the concrete rotating speed of electromotor and operating mode, electromagnetic valve controls the upstream or downstream of valve inner valve stem, and then control to spray into size and the time of oil mass in electromotor, can accurately realize controlling the timing of injection pump, quantitative oil spout, meet the needs of engine combustion.
2, the present invention changes multicylinder engine and adopts the traditional approach of multiple plunger matching parts fuel feeding, the problem producing oil mass difference when eliminating electronically controlled unit pump because of multiple electromagnetic valves and the work of multiple plunger matching parts, improve control accuracy, an electromagnetic valve is adopted to control single plunger fuel feeding, and the fuel feeding demand of electromotor is met by the structure of distributing shaft distribution oil mass, improve the combustibility of electromotor, make the tail gas of electromotor meet the requirement of Abgasgesetz.
3, the pump end pressure of the injection pump in the present invention is equal to the pump end pressure of electronically controlled unit pump, and higher than the pump end pressure of automatically controlled VE pump.
4, present configuration is simply compact, convenient to install and maintain and cost of manufacture is relatively low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of pump head part in the present invention.
Fig. 3 is the assembling schematic diagram of distributing shaft and distribution set in the present invention.
Fig. 4 is that the A-A of Fig. 3 is to schematic diagram.
Fig. 5 is the structural representation of convexity wheel shaft of the present invention.
Fig. 6 is the side view of Fig. 5.
Wherein,
null1、Distribution set 2、Distributing shaft 3、First oilhole 4、Ring shaped oil passage 5、First intersection oil duct 6、Low pressure cannelure 7、Second intersection oil duct 8、Second oilhole 9、Leakproof cannelure 10、Oil return oil duct 11、First seals screw plug 12、Pump head 13、Low-voltage fuel entrance 14、Low pressure oil pocket 15、Low pressure oilhole 16、Plunger 17、High-voltage oil cavity 18、First high-pressure oil duct 19、Control valve 20、Second high-pressure oil duct 21、Delivery valve 22、Electromagnetic valve 23、The pump housing 24、Speed probe 25、Open slot 26、Main shaft 27、Cam 28、Protruding 28.1、Concave arc-shaped section 28.2、Active section 28.3、Changeover portion 28.4、Reduction of speed section 29、Rolling bearing 30、Nut 31、Driving gear 32、Driven gear 33、Power transmission shaft 34、Drive plate 35、Sealing gasket 36、Hold out body component 37、Electromagnetic valve spring 38、Armature 39、Counter flange dish 40、Plunger bushing 41、Second seals screw plug 42、3rd intersection oil duct 43、4th intersection oil duct
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail, but the present invention is not limited to these embodiments.
nullAs shown in Figures 1 to 6，A kind of full electronic control injection pump assembly of distribution formula in upright arrangement，Including the pump housing 23 and pump head 12，Sealing gasket 35 it is provided with between the pump housing 23 and pump head 12，Pump head 12 is provided with low-voltage fuel entrance 13 and low pressure oil pocket 14，Low-voltage fuel entrance 13 is connected with the oil transfer pump being arranged on outside the pump housing 23，The front end of the described pump housing 23 is provided with counter flange dish 39，The front end of counter flange dish 39 is evenly equipped with 11 for realizing the positioning round orifice that injection pump assembly is connected with electromotor，It is provided with camshaft in the pump housing 23，Camshaft be provided above body component 36 of holding out，Plunger bushing 40 and the plunger 16 being arranged in plunger bushing 40 it is provided with in pump head 23，The mounting means being press-fitted is adopted between plunger 16 and plunger bushing 40，Plunger 16 is positioned at the top of body component 36 of holding out，The head of plunger 16 is provided with high-voltage oil cavity 17，Plunger 16 has and only has one，The top of plunger 16 is provided with the second sealing screw plug 41；The front and back ends of described camshaft is respectively arranged with rolling bearing 29, the front end of camshaft is fastenedly connected by the toothed disc of screw thread Yu electromotor, driving camshaft to rotate when the engine runs, the rear end of camshaft adopts nut 30 for eliminating the axial movement space of rotary course convexity wheel shaft；During camshaft operating, drive oil transfer pump that by low-voltage fuel entrance 13, low-voltage fuel is entered low pressure oil pocket 14；Described camshaft includes main shaft 26 and the cam 27 being arranged on main shaft 26, its circumference of the front end edge of main shaft 26 uniformly offers five open slots 25, being provided with speed probe on counter flange dish 39, speed probe is for detecting the rotating speed of camshaft, and speed probe is connected with the ECU of automobile；Cam 27 has and only has one, cam 27 adopts square structure, cam 27 is evenly equipped with four identical projections of structure 28, the angle of the axis of adjacent two projections 28 is 90 °, each protruding 28 all include concave arc-shaped section 28.1, active section 28.2, changeover portion 28.3 and reduction of speed section 28.4, a cycle of operation of the corresponding plunger 16 of a projection 28 on cam 27, and camshaft often rotates a circle, plunger 16 pumps four times, and pump head 12 is additionally provided with high pressure fuel distributor gear.
Described pump head 12 is additionally provided with high pressure fuel distributor gear, high pressure fuel distributor gear includes electromagnetic valve 22, distribution set 1 and delivery valve 21, distribution set 1 and electromagnetic valve 22 lay respectively at the both sides of plunger 16, electromagnetic valve 22 be arranged below control valve 19, electromagnetic valve spring 37 it is provided with in electromagnetic valve 22, it is provided with armature 38 between electromagnetic valve 22 and control valve 19, the power on/off of electromagnetic valve 22 is controlled by the ECU of automobile, it is provided with distributing shaft 2 in distribution set 1, distributing shaft 2 offers a plurality of oil duct that can communicate with delivery valve 21；The rear sleeve of described gear shaft is equipped with driving gear 31, distributing shaft 2 be arranged below drive plate 34, drive plate 34 be arranged below travelling gear shaft assembly, travelling gear shaft assembly includes power transmission shaft 33 and is nested with at power transmission shaft 33 bottom and the driven gear 32 suitable with driving gear 31, the top of drive plate 34 is connected with the bottom of distributing shaft 2, the bottom of drive plate 34 is connected with power transmission shaft 33, during cam axle, distributing shaft 2 is driven to rotate by driving gear 31, travelling gear shaft assembly and drive plate 34.
Adopt, between distributing shaft 2 and distribution set 1, the mounting means being press-fitted, the top of plunger 16 is provided with high-voltage oil cavity 17, the upper end of distributing shaft 2 is provided with the first sealing screw plug 11, the top of distribution set 1 offers the first oilhole 3, the top of distributing shaft 2 offers the ring shaped oil passage 4 being connected with the first oilhole 3, the middle part of distributing shaft 2 offers the first intersection oil duct 5 and the second intersection oil duct 7 communicated with each other, first intersection oil duct 5 is connected with ring shaped oil passage 4, the bottom of distribution set 1 is also evenly equipped with four the second oilholes 8, when distributing shaft 2 rotates, second intersection oil duct 7 communicates with four the second oilholes 8 or disconnects successively, second oilhole 8 communicates with delivery valve 21, delivery valve 21 is provided with four and the second oilhole 8 oil-out one to one；Pump head 12 is provided with the first high-pressure oil duct 18 being connected with high-voltage oil cavity 17 and the first oilhole 3 respectively, pump head 12 is additionally provided with for connecting high-voltage oil cavity 17 and controlling the second high-pressure oil duct 20 of valve 19, being additionally provided with low-voltage fuel entrance 13 and the low pressure oil pocket 14 communicated with each other and low pressure oilhole 15 on pump head 12, the border, periphery, middle part of described distribution set 1 offers low pressure annular oil groove 6.Plunger bushing 40 offers the 3rd intersection oil duct 42 and the 4th intersection oil duct 43, 3rd intersection oil duct 42 all connects with high-voltage oil cavity 17 with the 4th intersection oil duct 43, pump head 12 is additionally provided with the first high-pressure oil duct 18 and the second high-pressure oil duct 20, one end of first high-pressure oil duct 18 intersects oil duct 42 and communicates with the above-mentioned 3rd, the other end is connected with above-mentioned first oilhole 3, second high-pressure oil duct 20 one end intersects oil duct 43 and communicates with the 4th, the other end communicates with controlling valve 19, control the process that the valve rod in valve 19 moves down is capable of the connection between the second high-pressure oil duct 20 and low pressure oil pocket 14.
During distribution formula electronic control injection pump work in upright arrangement, the low-voltage fuel come from oil transfer pump conveying enters low pressure oil pocket 14 from low-voltage fuel entrance 13, it is full of low pressure oil pocket 14 after flowing through the low pressure cannelure 6 of distribution set 1 lower end, after low-voltage fuel is full of low pressure oil pocket 14, the high-voltage oil cavity 17 on plunger 16 top it is full of after controlling valve 19, plunger 16 starts to move upward under the drive of camshaft, compress the fuel oil on its top, after fuel oil pressurization, after the first high-pressure oil duct 18 and the second high-pressure oil duct 20, one end flows to distribution set 1, other end flow direction control valve 19；Now, electromagnetic valve 22 is energized work, and adhesive controls valve 19, cuts off and flows back to, through the second high-pressure oil duct 20, the oil duct controlling valve 19, forces high pressure fuel can only flow to distribution set 1 through the first high-pressure oil duct 18；Flow to the high pressure fuel of distribution set 1, the ring shaped oil passage 4 of distributing shaft 1 upper end is entered through the first oilhole 3, then flow through the first intersection oil duct 5 and arrive the second intersection oil duct 7, now, distributing shaft 2 rotates under the drive of camshaft, second intersection oil duct 7 just communicates with in four the second oilholes 8 of distribution set 1 bottom, and high pressure fuel enters delivery valve 21 through the second oilhole 8 to start to engine air cylinder injection high pressure fuel, and electromotor starts running.The present invention controls valve by electromagnetic valve and produces four timings, quantitative high pressure fuel, then passes through the high pressure fuel distributor gear on pump head and realizes supplying four sub-high pressure fuel oils to electromotor.
When plunger 16 moves downward under the drive of camshaft, electromagnetic valve 22 power-off, control valve 19 to flick, second high-pressure oil duct 20 is connected, low-voltage fuel in low pressure oil pocket 14 through controlling the gap between the valve rod in valve 19 and the inwall controlling valve 19, the second high-pressure oil duct 20 and the 4th intersects the high-voltage oil cavity 17 that oil duct 43 flows on plunger 16, low-voltage fuel is full of high-voltage oil cavity 17, ready for plunger 16 up compression fuel oil；When plunger 16 is descending, distributing shaft 2 still rotates under the drive of camshaft, and only in this process, the second intersection oil duct 7 on distributing shaft 2 does not communicate with any one in the second oilhole 8 on distribution set 1, and delivery valve 21 is not fuel-displaced.
The bottom of described distributing shaft 2 offers leakproof cannelure 9, the bottom of distribution set 2 offers the oil return oil duct 10 communicated with leakproof cannelure 9, leakproof cannelure 9 and oil return oil duct 10 are respectively positioned on the lower section of the second oilhole 8, oil return oil duct 10 is connected with above-mentioned low pressure oilhole 15, owing to there is gap between distributing shaft 2 and distribution set 1, cause that high pressure fuel leaks downwards from gap, after the fuel oil of leakage arrives the leakproof cannelure 9 of distributing shaft 2 lower end, oil return oil duct 10 on the allocated set 1 enters the low pressure oilhole 15 of pump head 12 lower end and flows back to low pressure oil pocket 14 and recycle, prevent the leakage of high pressure fuel.
Above-mentioned cam 27 rotates a circle, plunger 16 pumps four times, plunger 16 is driven to compress high pressure fuel four times, electromagnetic valve 22 is also energized four times, adhesive controls valve 19 4 times, four sub-high pressure fuel oils are supplied to distributing shaft 2 through the first high-pressure oil duct 18, the cylinder of an oil-out flow direction engine of all corresponding delivery valve 21 every time, thus achieve one the allocated axle 2 of plunger 16 of employing and distribute the high pressure fuel mode to four cylinder engine fuel feeding, broken traditional injection pump and adopted four plungers to the mode of four cylinder engine fuel feeding.
Generally speaking, when plunger 16 is up, plunger 16 compresses the fuel oil in high-voltage oil cavity 17 and produces high pressure, high pressure fuel flows to the first high-pressure oil duct 18 and the second high-pressure oil duct 20 simultaneously, the fuel oil flowing to the first high-pressure oil duct 18 can be flowed to delivery valve 21 by distributing shaft 2 and finally be sprayed into engine air in-cylinder combustion, and the fuel oil flowing to the second high-pressure oil duct 20 can pass through to control valve 19 and flow into low pressure oil pocket 14 to realize fuel oil release.Fuel oil be eventually leading to depend on energising or the power-off of electromagnetic valve 22.During solenoid valves, control valve 19 inner valve stem up, valve rod bottom plugs low pressure oil pocket 14 and the oil-gap excessively controlling between valve, and high pressure fuel sprays in cylinder only by the first high-pressure oil duct 18, distribution set 1, distributing shaft 2 and delivery valve 21, for engine combustion.During electromagnetic valve power-off, valve rod is descending, low pressure oil pocket 14 and the oil-gap of crossing controlled between valve 19 are opened, camshaft rotates simultaneously, and drive distributing shaft 2 to rotate, any one in second intersection four the second oilholes 8 of oil duct 7 misalignment on distributing shaft 2, high pressure fuel cannot pass through distributing shaft 2 and flow into delivery valve 21, and selects to carry out release by the second high-pressure oil duct 20 and low pressure oil pocket 14 and the oil-gap entrance low pressure oil pocket 14 of crossing controlling between valve 19.In this process, the energising of electromagnetic valve 22 or power-off are controlled by ECU, ECU and receive the tach signal from speed probe 24, feed back to electromagnetic valve after being computed, ECU freely adjusts the beginning and end of the energising of electromagnetic valve 22 according to the actual speed of electromotor and load, it is achieved that timing oil spout.The length of electromagnetic valve 22 conduction time determines and sprays into the size of oil mass in cylinder, can freely control distributive value according to being actually needed of electromotor, it is achieved quantitatively oil spout.
The part do not addressed in the present invention adopts or uses for reference prior art and can realize.
Additionally, term " first ", " second ", " the 3rd ", " the 4th " are only for descriptive purposes, and it is not intended that indicate or hint relative importance.
Specific embodiment described herein is only the spiritual example explanation to the present invention.Described specific embodiment can be made various amendment or supplements or adopt similar mode to substitute by those skilled in the art, but without departing from the spirit of the present invention or surmount the scope that appended claims is defined.
Claims (10)
- null1. the full electronic control injection pump assembly of distribution formula in upright arrangement，Including the pump housing and the pump head being arranged on the pump housing，Pump head is provided with low-voltage fuel entrance and low pressure oil pocket，Low-voltage fuel entrance is connected with the oil transfer pump being arranged on outside the pump housing，Camshaft it is provided with in the pump housing，Camshaft be provided above body component of holding out，Plunger it is provided with in pump head，Plunger is positioned at the top of body component of holding out，The head of plunger is provided with high-voltage oil cavity，It is characterized in that，The quantity of plunger is one，Described camshaft includes main shaft and the cam being arranged on main shaft，The quantity of cam is one，Cam is evenly equipped with four identical projections of structure，The angle of adjacent two protruding axis is 90 °，Each projection all includes concave arc-shaped section、Active section、Changeover portion and reduction of speed section，One cycle of operation of the protruding corresponding plunger of on cam，Camshaft often rotates a circle，Plunger pumps four times，Pump head is additionally provided with high pressure fuel distributor gear.
- 2. a kind of full electronic control injection pump assembly of distribution formula in upright arrangement according to claim 1, it is characterised in that the front end of described main shaft uniformly offers multiple open slot, and the described pump housing is provided with speed probe, and speed probe is connected with ECU.
- 3. a kind of full electronic control injection pump assembly of distribution formula in upright arrangement according to claim 1, it is characterised in that described cam adopts square structure, and the front and back ends of described camshaft is respectively arranged with rolling bearing, and camshaft is connected with the pump housing by rolling bearing.
- 4. a kind of full electronic control injection pump assembly of distribution formula in upright arrangement according to claim 1, it is characterized in that, described high pressure fuel distributor gear includes electromagnetic valve, distribution set and delivery valve, distribution set and electromagnetic valve lay respectively at the both sides of plunger, electromagnetic valve be arranged below control valve, electromagnetic valve spring it is provided with in electromagnetic valve, it is provided with armature between electromagnetic valve and control valve, the power on/off of electromagnetic valve is controlled by the ECU of automobile, it is provided with distributing shaft in distribution set, distributing shaft offers a plurality of oil duct that can communicate with delivery valve.
- 5. a kind of full electronic control injection pump assembly of distribution formula in upright arrangement according to claim 4, it is characterized in that, the rear sleeve of described gear shaft is equipped with driving gear, distributing shaft be arranged below drive plate, drive plate be arranged below travelling gear shaft assembly, travelling gear shaft assembly includes power transmission shaft and is nested with at power transmission shaft bottom and the driven gear suitable with driving gear, and the top of drive plate is connected with the bottom of distributing shaft, and the bottom of drive plate is connected with power transmission shaft.
- null6. a kind of full electronic control injection pump assembly of distribution formula in upright arrangement according to claim 5，It is characterized in that，The top of described distribution set offers the first oilhole，The top of distributing shaft offers the ring shaped oil passage being connected with the first oilhole，The middle part of distributing shaft offers the first intersection oil duct communicated with each other and the second intersection oil duct，First intersection oil duct is connected with ring shaped oil passage，The bottom of distribution set is also evenly equipped with four the second oilholes，When distributing shaft rotates，Second intersection oil duct communicates with four the second oilholes or disconnects successively，Delivery valve is provided with and four the second oilholes, four oil-outs one to one，Delivery valve is connected with the fuel injector being arranged on outside the pump housing，Fuel injector passes through fuel passage and engine cylinders，Electromotor includes four cylinders，Fuel injector is provided with and four oil-outs, four oil-ins one to one on delivery valve，Four oil-ins are respectively through four fuel pipes and four cylinders，When the pressure of fuel oil is higher than the unlatching pressure of delivery valve，Fuel oil enters fuel injector through delivery valve，Camshaft often rotates a circle，Four oil-outs difference of delivery valve are fuel-displaced once，Fuel injector four fuel oils of injection are for four cylinders of electromotor.
- 7. a kind of full electronic control injection pump assembly of distribution formula in upright arrangement according to claim 6, it is characterized in that, described plunger is arranged in plunger bushing, plunger bushing is arranged on pump head, plunger bushing offers the 3rd intersection oil duct and the 4th intersection oil duct, 3rd intersection oil duct and the 4th intersection oil duct all connect with high-voltage oil cavity, pump head is additionally provided with the first high-pressure oil duct and the second high-pressure oil duct, one end of first high-pressure oil duct intersects oil duct and communicates with the above-mentioned 3rd, the other end is connected with above-mentioned first oilhole, second high-pressure oil duct one end intersects oil duct and communicates with the 4th, the other end communicates with controlling valve, control the process that the valve rod in valve moves down is capable of the connection between the second high-pressure oil duct and low pressure oil pocket.
- 8. a kind of full electronic control injection pump assembly of distribution formula in upright arrangement according to claim 6, it is characterized in that, the bottom of described distributing shaft offers leakproof cannelure, the bottom of distribution set offers the oil return oil duct communicated with leakproof cannelure, leakproof cannelure and oil return oil duct are respectively positioned on the lower section of the second oilhole, offering the low pressure oilhole communicated with oil return oil duct on described pump head, low pressure oilhole is connected with low pressure oil pocket.
- 9. a kind of full electronic control injection pump assembly of distribution formula in upright arrangement according to claim 6, it is characterised in that the border, periphery, middle part of described distribution set offers low pressure annular oil groove.
- 10. a kind of full electronic control injection pump assembly of distribution formula in upright arrangement according to claim 1, it is characterised in that the upper end of described distributing shaft is provided with the first sealing screw plug, and the upper end of plunger is provided with the second sealing screw plug.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610060832.1A CN105736204B (en) | 2016-01-28 | 2016-01-28 | A kind of full electronic control injection pump assembly of array distribution formula |
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| CN201610060832.1A CN105736204B (en) | 2016-01-28 | 2016-01-28 | A kind of full electronic control injection pump assembly of array distribution formula |
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| CN105736204A true CN105736204A (en) | 2016-07-06 |
| CN105736204B CN105736204B (en) | 2018-08-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645127A (en) * | 2019-09-25 | 2020-01-03 | 南京威孚金宁有限公司 | VE pump head component of single oil outlet valve and use method |
| CN110671249A (en) * | 2019-09-25 | 2020-01-10 | 南京威孚金宁有限公司 | Distribution pump plunger with oil outlet valve and working method thereof |
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| CN1452692A (en) * | 2000-05-26 | 2003-10-29 | 洋马株式会社 | Fuel injection pump |
| US20090164093A1 (en) * | 2007-12-19 | 2009-06-25 | Gm Global Technology Operations, Inc. | High pressure pump actuation in a vehicle |
| US20140331975A1 (en) * | 2013-05-09 | 2014-11-13 | Ford Global Technologies, Llc | System and method for operating a direct injection fuel pump |
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| JP2001115921A (en) * | 1999-10-14 | 2001-04-27 | Yanmar Diesel Engine Co Ltd | Distribution type fuel injection pump |
| CN1452692A (en) * | 2000-05-26 | 2003-10-29 | 洋马株式会社 | Fuel injection pump |
| EP1333173A1 (en) * | 2000-11-09 | 2003-08-06 | Yanmar Co., Ltd. | Accumulator distribution type fuel injection pump |
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| CN110645127A (en) * | 2019-09-25 | 2020-01-03 | 南京威孚金宁有限公司 | VE pump head component of single oil outlet valve and use method |
| CN110671249A (en) * | 2019-09-25 | 2020-01-10 | 南京威孚金宁有限公司 | Distribution pump plunger with oil outlet valve and working method thereof |
| CN110645127B (en) * | 2019-09-25 | 2023-07-07 | 南京威孚金宁有限公司 | VE pump head part of single oil outlet valve and use method |
| CN110671249B (en) * | 2019-09-25 | 2023-07-07 | 南京威孚金宁有限公司 | Distribution pump plunger with oil outlet valve and working method thereof |
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|---|---|
| CN105736204B (en) | 2018-08-21 |
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