CN103644059A - Pressure accumulation type oil supply system with layered fuel oil distributor - Google Patents
Pressure accumulation type oil supply system with layered fuel oil distributor Download PDFInfo
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Abstract
The invention discloses a pressure accumulation type oil supply system with a layered fuel oil distributor. The pressure accumulation type oil supply system with the layered fuel oil distributor comprises a mechanical oil sprayer, the layered fuel oil distributor, an oil spraying control valve device, an oil return control valve device, a pressure accumulator assembly, a high-pressure oil supply pump assembly and a system ECU, wherein the layered fuel oil distributor comprises a distribution rotor and a distribution stator, the oil spraying control valve device is used for providing oil for the layered fuel oil distributor, the oil return control valve device is used for carrying out oil return on the layered fuel oil distributor, the pressure accumulator assembly is used for providing the oil for the oil spraying control valve device and the oil return control valve device, and the high-pressure oil supply pump assembly is used for supplementing the oil to the pressure accumulator assembly, and driving the distribution rotor to rotate; distribution stator oil outlet holes are formed in a multi-layer mode, radial distribution rotor oil outlet holes are formed in the distribution rotor, and the number of layers of the distribution rotor oil outlet holes is equal to the number of layers of the distribution stator oil outlet holes; a distribution rotor oil inlet channel can serve as an oil return channel, and is controlled in an interaction mode through an oil circuit control device. According to the pressure accumulation type oil supply system with the layered fuel oil distributor, due to the fact that the layered fuel oil distributor is adopted, usable oil supply phases which are improved manyfold and usable oil return phases which are improved manyfold are obtained, the pressure and time control function of a traditional mechanical oil sprayer for oil supply of a multi-cylinder machine is achieved through cooperation between the electrically-controlled oil circuit control device and the pressure accumulator assembly, the discharging capacity is improved, the cost of the system is reduced, and the range of application of dispensing pumps is widened.
Description
Technical field
The present invention relates to the automatically controlled distribution high-pressure fuel oil system of pressure accumulation type that a kind of internal-combustion engine is used, especially relate to a kind of pressure accumulation type oil supply system that adopts layer-stepping fuel dispenser.
Background technique
Energy-conservation is two large Driving forces of current internal-combustion engine technology development with reducing discharging.In the world developed country since the early 1990s in last century combustion motor implement strict Abgasgesetz, and As time goes on rules are more and more harsher.This wherein oil-fired system be the core technology place that automobile reaches more maximum discharge standard, the mainstream development trend of oil-fired system is towards high-pressure injection, multi-injection, electric-controlled injection future development, so the scientific research personnel of each large engine fuel injection supply commercial city amount of having high input of the world studies high-pressure fuel oil system.Engine fuel oil system is generally upgraded to electronically controlled automatically controlled pump from mechanical pump at present, electric control fuel oil jet system experiences three generations's development course up till now substantially: first generation positioning control formula, by the control of high-pressure oil feed pump assembly oil mass pull bar being realized to the control of fuel injection quantity, as electricity is adjusted pump; Second generation time-based control, realizes the accurate control to oil mass by electromagnetic valve injection time, as automatically controlled VE pump, electronically controlled unit pump; Third generation pressure-time is controlled formula, by the control of jet pressure time is realized to more maximum discharge, as Electrocontrolled high-pressure common rail oil-fired system.
On market by large batch of use all kinds of mechanical pumps for many years, because its fuel delivery is relevant with rotating speed, when low speed, jet pressure cannot improve, the cam profile that control response aspect etc. is all driven affects and cannot unconfinedly improve, therefore mechanical pump cannot meet more and more stricter emission regulation demands, and OuⅢHe state 4 emission standards are eliminated by market after implementing substantially at present.
Existing Electrocontrolled high-pressure common rail oil-fired system, pump oil process and injection process are separated, jet pressure is not affected by rotating speed, load, can freely control, adopt the oil sprayer of solenoid valve or piezoelectric crystal final controlling element to carry out injection time and fuel injection quantity Flexible Control, and can in a work cycle, realize repeatedly oil spout.From this angle, Electrocontrolled high-pressure common rail oil-fired system is the preferential selection that meets maximum discharge standard.But, Electrocontrolled high-pressure common rail oil-fired system complex structure, especially electric-controlled fuel injector, difficulty of processing is large in addition, and particularly manufacture process requirement is very high, and its service condition market is safeguarded all extremely difficult.
This wherein automatically controlled VE pump with it, only need the fuel dispenser can be to multi-cylinder engine fuel feeding, and low with its cost, volume is little, fuel feeding evenly these distinguishing features is being widely used now.
Known a kind of like this high-pressure oil feed pump assembly from DE--C-2449332, it has a fuel dispenser, when dispensing piston is reciprocating in housing, is rotated.Wherein dispensing piston outlet is used as dispensing orifice, and by this dispensing orifice, it is intermittent to high-voltage tube assembly supply high pressure fuel that high pressure fuel is pressed engine ignition order.By the upgrading to mechanical type VE proportioning pump, formed the electric control VE dispensing pump in many generations, wherein two kinds of time-based control electronic control dispensing pumps of VP37 and VP44 can be realized 140MPa pressure injection with it and reach Europe III emission standard and become Typical Representative.
Application publication number CN 101936244 A names are called in " Novel high-pressure fuel oil system for internal combustion engine ", having proposed one adopts the high-pressure fuel-feed pump of inlet metering valve oil-feed to accumulator fuel feeding, high pressure oil in accumulator, is realized and is joined machine object to distributor fuel feeding through a magnetic valve controller.Owing to only adopting in this invention a magnetic valve controller to carry out release to oil return, by affecting it, join machine emission performance index, in this invention, fail to announce the detailed actuator structure of controlling for oil circuit.
US Patent No. 5431142 has fuel dispenser and accumulator, reaches the control to injection pressure and time, can meet diesel engine higher emissions standard-required.Its structure is: the fuel oil through high-pressure service pump pressurization enters accumulator, then through the first electromagnetic valve, high pressure fuel is sent to minute this device, and distribute the oil sprayer that arrives respective cylinder to carry out oil spout through distributor, control through the second solenoid valve stops oil spout again, and similarly the patent of sophisticated functions design also has CN1055745C more.
Similarly the application publication number CN 102619665 A names of function are called in " automatically controlled pressure accumulation distribution type common-rail system ", proposed to accumulator, to supply high pressure oil by high pressure inline pump, accumulator high pressure oil passes through a solenoid electric valve to distributor fuel feeding, re-use another solenoid valve and cut off fuel feeding for oil return release, be finally embodied as the object of multi-cylinder engine fuel feeding.In this invention, distributor oil outlet is distributed on a circumferential section, balance for fuel feeding duration and sealing, it cannot mate the more motor of multi-cylinder, in this invention, also fail to announce detailed two actuator structures controlling for oil circuit, also do not announce cooperatively interact structure and the phase relationship of two electromagnetic valve devices and distributor.
These above-mentioned its cores of electronic control dispensing pump system are all to have a fuel dispenser, distributor oil outlet is distributed on single circumferential section, because be subject to limited circumference circle and oil spout need to there is certain endurance, this has just caused and on circumference, has been difficult to lay out a plurality of oil outlets, and therefore this proportioning pump is very difficult to mate and is applied on motors more than 6 cylinders.
For joining machine application area, in publication number CN 1786457A name, be called in " preset high pressure distributing type fuel oil injecting pump " invention, it utilizes and on distribution rotor axle, to process pre-spray orifice and spray orifice repeatedly, by adjustment skewed slot and spray orifice, open section area and carry out coarse adjustment oil mass, its oil mass that cannot realize under variable working condition is accurately controlled, particularly pressure cannot Flexible Control, does not adopt accumulator structure and electron controls technology cannot realize maximum discharge requirement.
Adopt the oil supply system of mechanical type dispensing device, exist owing to being subject to end cam lift limitations affect jet pressure and circumferential phase place cannot arrange that too many oil outlet affects the operating mode of joining machine scope; Adopt the oil supply system of the electric-controlled type dispensing device after upgrading, although it goes out the restriction that oil pressure improves but still exist individual layer layout oil outlet limited amount; Adopt electronic control system, need the high electric-controlled fuel injector of many cover highi degree of accuracy prices to come improving performance and discharge.
Summary of the invention
The object of the invention is to the raising along with emission regulation demands, oil supply system requires will there be more accurate flexible adjustable control function at injection timing aspect quantitative, and the pressure-time of fuel oil is controlled.Therefore after based on layering between distributor adjacent holes designed oil return function in obtainable relatively large phase basis, by introducing the supporting automatically controlled oil route controller of threeway pattern, a solenoid valve is used for the timing controlled of oil spout, a solenoid valve is controlled for oil return start-up time, and the mutual cooperation of two solenoid valves is controlled to form the quantitative control of fuel injection quantity and fuel injection characteristic are changed.
Another object of the present invention is to provide for layer-stepping fuel dispenser the high pressure fuel pressure source that lasting and rotating speed is irrelevant, for improving the average fuel feeding effective pressure of system, thereby be conducive to emission control requirement, thereby in the present invention, introduced an independently pressure accumulator assembly.
Just based on above-mentioned these objects, the present invention is by layer-stepping fuel dispenser, oil route controller, pressure accumulator assembly and high-pressure oil feed pump assembly, form a pressure accumulation type electronic control dispensing pump oil supply system that adopts layer-stepping fuel dispenser, on its basis reducing costs, widened the application area of proportioning pump, realized the pressure-time mode of system fuel injection quantity simultaneously and control, improved and join machine emission performance.
The present invention for achieving the above object, adopts following technological scheme:
A pressure accumulation type oil supply system that adopts layer-stepping fuel dispenser, is characterized in that: it comprises by the layer-stepping fuel dispenser, housing, injector control valve device, oil return control valve device, pressure accumulator assembly, high-pressure oil feed pump assembly, oil transfer pump, the system ECU that distribute stator and distribution rotor to form;
A kind of layer-stepping fuel dispenser, comprise distribution rotor, distribute stator and housing, it is characterized in that: described distribution stator oil outlet is divided into multilayer and arranges, in distribution rotor, there is the radial distribution rotor oil outlet identical with distributing divided stator number of plies amount, distribution rotor oil input channel is also used as back oil road, described distribution stator oil outlet quantity is identical with number of engine cylinders, and layering quantity and number of engine cylinders match, and number of cylinders is the integral multiple of layering quantity.
Described injector control valve device and oil return control valve device integrated installation are on housing and control distribution rotor oil input channel fuel oil circulation, and distributing what between layer-stepping fuel dispenser that stator and distribution rotor form and injector control valve device, oil return control valve device, form is a kind of threeway oil circuit relation.
Adopt the pressure accumulator assembly of absolute construction in order to build up and temporarily to store fuel oil and to form a stable pressure source under preset pressure by the pressure monitor sensor of installing on it, this pressure source is connected directly to housing and flows to injector control valve device and oil return control valve device from pressure accumulator assembly by high-pressure oil pipe.
High-pressure oil feed pump assembly comprises the pump housing, camshaft, inlet metering valve, plunger.Described being arranged on camshaft and by the oil transfer pump of camshaft actuated carries low pressure oil by being arranged on after the inlet metering valve measure control of controlling aperture through system ECU on the pump housing, formed high pressure fuel compensate to pressure accumulator assembly by the compression of camshaft actuated plunger motion.Described high-pressure oil feed pump assembly also comprises cylinder identification sensor.Distribute stator to be rotated by camshaft actuated, in each layering in distribution rotor, between oil outlet and oil outlet in corresponding each layering distributing on stator, become intermittent work state, by by the fire ignition sequence of motor, fuel oil being sent into oil sprayer successively after cylinder identification sensor judgement motor the 1st cylinder; When distribution rotor oil pump capacity reaches after target oil mass, by system ECU, control the power-off of oil return control valve device and open oil circuit, the residual fuel oil in the distributor high-pressure oil pipe oil circuit that particularly oil sprayer is connected with distributor is back to fuel tank and carries out release.
It is further characterized in that: described injector control valve device comprises oil spout valve seat, oil spout spool, injection valve spring, sealed steel ball and control solenoid valve; Oil spout valve seat is arranged in housing, oil spout spool by injection valve spring compression on oil spout valve seat in hermetically closing state; Fuel oil in-line is divided into two-way, and a road is that injector control valve control oil duct communicates with being positioned at oil spout spool top injector control valve control cavity volume A, and another road is that injector control valve oil input channel communicates with oil spout spool bottom.
the invention has the beneficial effects as follows:
1, this oil supply system adopts the combination of pressure accumulator assembly and hydraulic injection device, has realized without using the electric-controlled fuel injector that access threshold is high and price is high to have the pressure-time of high pressure fuel to control function.
2, adopt layer-stepping fuel dispenser can obtain the available fuel feeding duration phase place promoting at double, be conducive to this oil supply system and widen it and join acc power and application area.
3, larger phase place between the adjacent oil outlet based on obtaining after layering, has designed oil return release phase place and for oil return release provides enough phase place demands, has been conducive to the release of this oil supply system at fuel feeding after the duration, reach and stop the clear-cut effect of oil.
4, based on oil return release, have enough phase places, the stability of system residual pressure is also improved, and this is to promoting cylinder uniformity and requiring the consistent original state of each cylinder that effective support is provided.
5, the fuel feeding based on layer-stepping distributor and oil return all design same to go out on oil pocket, be conducive to introduce injector control valve device and oil return control valve device and form design of tee joint structure, make fuel feeding of the present invention and drainback passage share a set of oil circuit pipeline, only use this covering device to join machine for multi-cylinder engine effective fuel feeding guarantee is provided, the particularly use on multi-cylinder type, to significantly reduce the cost of this oil supply system, promote its market competitiveness.
6, injector control valve device and the oil return control valve device based on introducing adopts automatically controlled design, and separate work provides favourable guarantee at injection timing, oil spout aspect quantitative.Meanwhile, the system of can be provides the crippled function such as travel, elevator system application degree of normality.
7, based on layer-stepping fuel dispenser fuel feeding and oil return, adopt the design of tee joint structure of same oil circuit, in conjunction with high responsiveness oil route controller, can realize the desirable a few thing state of oil-fired system: if the oil spout initial stage is by oil circuit is opened, can realize the change of injection rate; The cooperation of two solenoid valves and for example, for multi-injection sprays possibility is provided especially afterwards, these all join machine exhaust index by what significantly promote this oil supply system.
8, fuel feeding carries out oil return by the residual high pressure fuel oil between distributor and oil sprayer after finishing, therefore, this oil supply system is without installing with cylinder number with identical delivery valve matching parts and constant pressure valve, and need not the worry worry of reliability of these two valves of system also can significantly reduce costs.
Accompanying drawing explanation
Fig. 1 is system principle schematic diagram of the present invention.
Fig. 2 a is the not known distributor longitudinal section view of layering of 6 cylinder machines.
Fig. 2 b is the not known distributor axial, cross-sectional view of layering of 6 cylinder machines.
Fig. 3 a, Fig. 3 b are two different layering longitudinal section view of the fuel-displaced in the same way uniform pattern of layer-stepping distributor for 6 cylinder machines.
Fig. 3 c is the fuel-displaced in the same way pattern axial, cross-sectional view of layer-stepping distributor for 6 cylinder machines.
Fig. 4 is injector control valve device and distributor sectional view.
Fig. 5 is oil return control valve device and distributor sectional view.
Fig. 6 is injector control valve device cooling oil path sectional view.
Fig. 7 is in-line arrangement high-pressure oil feed pump assembly stereogram.
Fig. 8 a is distributor, camshaft, oil transfer pump connection diagram.
Fig. 8 b is contiguous block sectional view.
Fig. 9 is one embodiment of the invention overall perspective view.
Figure 10 is automatically controlled phase diagram.
Figure 11 a is distribution rotor polyphase decomposition figure.
Figure 11 b is not working state sectional view of distributor.
Figure 11 c is that distributor is for oil condition sectional view.
Figure 11 d is distributor oil return state sectional view.
In figure:
1, distribute stator;
11, distribute stator the 1st cylinder oil outlet, 12, distribute stator the 2nd cylinder oil outlet, 13, distribute stator the 3rd cylinder oil outlet, 14, distribute stator the 4th cylinder oil outlet, 15, distribute stator the 5th cylinder oil outlet, 16, distribute stator the 6th cylinder oil outlet, 17A, distribute the 1st layer of stator to go out oil pocket, 17B, distribute the 2nd layer of stator to go out oil pocket, 18, distribute stator inner circumference annular oil groove.
2, distribution rotor;
21, distribution rotor goes out oil pocket, the 1st layer of 21A, distribution rotor go out oil pocket, the 2nd layer of 21B, distribution rotor go out oil pocket, 22, distribution rotor oil outlet, 22A, the 1st layer of oil outlet of distribution rotor, 22B, the 2nd layer of oil outlet of distribution rotor, 23, distribution rotor oil input channel, 24, distribution rotor communicated cavity, 24A, the 1st layer of communicated cavity of distribution rotor, 24B, the 2nd layer of communicated cavity of distribution rotor, 25, distribution rotor equalizing orifice, 26, distribution rotor counter balance pocket, 27, distribution rotor excircle annular oil groove, 28, distribution rotor spill port, 29, distribution rotor back oil road.
3, housing;
31, injector control valve is controlled oil duct, and 32, injector control valve oil input channel, 33, injector control valve oil road, 34, oil return control valve oil input channel, 35, oil return control valve oil road, 36, cooling oil input channel, 37, cooling oil road.
4, injector control valve device;
41, oil spout valve seat, 42, oil spout spool, 43, injection valve spring, 44, sealed steel ball, 45, injector control valve solenoid valve.
5, oil return control valve device;
51, oil return spool, 52, oil return valve seat, 53, scavenger valve spring.
6, oil transfer pump;
61, oil transfer pump lining, 62, oil transfer pump external rotor, 63, oil transfer pump internal rotor.
7, pressure accumulator assembly;
71, pressure transducer.
8, high-pressure oil feed pump assembly;
81, the pump housing, 82, camshaft, 83, cylinder identification sensor, 84, inlet metering valve, 85, high pressure oil outlet, 86, flow-off, 87, filler opening, 811, pump housing free end attachment face, 821, camshaft actuated end, 822, camshaft free end.
9, contiguous block;
A, injector control valve are controlled cavity volume, B, injector control valve shoe cream room, C, distributor annular chamber, D, oil return control valve shoe cream room, E, oil return voltage stabilizing cavity volume, F, the fuel-displaced side shoe cream room of oil transfer pump.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
The present invention has announced a kind of oil supply system that adopts layer-stepping fuel dispenser, comprise hydraulic injection device, by distribution rotor and distribute that stator forms for the layer-stepping fuel dispenser to hydraulic injection device fuel feeding, for the injector control valve device to layer-stepping fuel dispenser fuel feeding and oil return and oil return control valve device, for the pressure accumulator assembly to control valve device fuel feeding, high-pressure oil feed pump assembly, system ECU for rotating to pressure accumulator assembly repairing and driving distribution rotor.Described distribution rotor is rotated in distributing stator, and the intermittent distribution stator oil outlet of fuel feeding that distributes is divided into multilayer layout, has the radial distribution rotor oil outlet identical with layering quantity in distribution rotor; Distribution rotor oil input channel is also used as back oil road, and fuel feeding and oil return can be successively to carry out, and can be also to carry out under specific operation simultaneously, and this is controlled alternately by the oil route controller being communicated with layer-stepping distributor.
Therefore, core of the present invention is layer-stepping fuel dispenser, the new function of layer-stepping fuel dispenser of take is that basis introduces oil route controller, and the formed a kind of pressure accumulation type electronic control dispensing pump fuel oil supply system that uses pressure-time that hydraulic injection device can be realized fuel oil to control function of peripheral auxiliary device.
The working principle of this oil supply system of paper, referring to Fig. 1.This oil supply system is mainly by distributing stator 1, distribution rotor 2, housing 3, injector control valve device 4, oil return control valve device 5, oil transfer pump 6, pressure accumulator assembly 7, high-pressure oil feed pump assembly 8, system ECU to form.The low pressure oil that the oil transfer pump 6 that is arranged on camshaft 82 and is driven by camshaft 82 is sent here, by being arranged on after inlet metering valve 84 measure control of controlling aperture through system ECU on the pump housing 81, is formed high pressure fuel by camshaft 82 drive plunger motion compresses and compensates to pressure accumulator assembly 7, the pressure accumulator assembly 7 of absolute construction is in order to build up and temporarily to store fuel oil and to form a stable pressure source under preset pressure by pressure transducer 71 monitoring of installing on it, and this pressure source is connected directly to housing 3 by high-pressure oil pipe from pressure accumulator assembly 7 and flows to injector control valve device 4, distribute stator 1 to be fixedly mounted in housing 3, distribution rotor 2 is sleeved on to distribute in stator 1 and by camshaft 82 and drives and rotate, between each layering oil outlet in distribution rotor 2 and each layering oil outlet distributing on stator 1, become intermittent work state, by by the fire ignition sequence of motor, fuel oil being sent into hydraulic injection device (not shown) successively after cylinder identification sensor 83 judgement motor the 1st cylinders, also integrated injector control valve device 4 and the oil return control valve device 5 being arranged on housing 3 being communicated with distribution rotor 2 and distribution stator 1, and design is between the oil input channel that is also used as back oil road of distribution rotor 2 rotating centers, what form is a kind of threeway oil circuit relation, when going out oil pocket to some phase places by distribution rotor 2, distribution rotor 2 rotation is communicated with distribution stator 1 oil outlet while needing fuel feeding to hydraulic injection device, injector control valve device 4 is controlled energising by system ECU, thereby open in-line, fuel oil is flow among distributor by pressure accumulator assembly 7, when distribution rotor 2 oil pump capacity reach the requirement of aims of systems oil mass, injector control valve device 4 is controlled power-off by system ECU, pressure accumulator assembly 7 to the in-line between distributor is closed, by system ECU, control oil return control valve device 5 simultaneously and open oil circuit, residual fuel oil in the distributor high-pressure oil passage that particularly oil sprayer is connected with distributor is refluxed away and carries out release, be beneficial to the rapid oil-break of oil sprayer, reach and stop the clear-cut effect of oil, be beneficial to motor discharge, therefore, native system is without delivery valve matching parts and constant pressure valve are installed, in another return line, pressure adjusting part (not shown) is installed, for coordinate recirculating oil quantity number and stop reaching certain between oily effect and be satisfied with balance.
From above-mentioned working principle, can find out when this oil supply system requires oil return, distribution rotor 2 goes out oil pocket and distributes stator 1 oil outlet still in connected state, be that oil spout is (being convenient to automatically controlled) being connected with the phase place of oil return, and this need larger phase place just can guarantee carrying out smoothly of oil spout and oil return process.Obviously, if be evenly equipped with i on single circumferential section, distribute stator oil outlet, the phase place between two adjacent oil outlets is 360/i, will comprise fuel feeding and continue phase angle T, the phase place L that between necessary adjacent two oil outlets, effective sealing circumferential length takies under large like this phase place.Therefore, between the phase place L that the lasting phase place T of maximum fuel feeding that can provide between each adjacent oil outlet on a circumferential section and the effective sealing circumferential length that must provide take simultaneously, there is contradiction, though increase, distribution rotor external diameter obtains T simultaneously and L promotes, and requires to have again contradiction between the low tangential linear velocity of distribution rotor external diameter.According to coupling motor operating mode and consider effective installing space, generally oil outlet quantity i for be no more than 4 suitable, this has limited application area.Therefore the employing layer-stepping fuel dispenser proposing in the present invention provides solution for this reason, by being originally distributed in the oil outlet distributing on circumferential section of stator, carried out layered arrangement design, and the distribution rotor of the layering that matches with it of Synchronization Design, by such hierarchical design, oil outlet quantity on single circumferential section will reduce at double, this mean obtainable fuel feeding continue the phase place L that between phase place T and necessary adjacent two oil outlets, effective sealing circumferential length takies and will be multiplied.
First introduce existing known distributor working principle, then introduce the detail of layer-stepping fuel dispenser of the present invention, in contrast, embody the advantage of layer-stepping fuel dispenser self and the new features of bringing for this oil supply system.
What Fig. 2 a and Fig. 2 b showed is the existing known distributor sectional view that does not adopt the principle of stratification for 6 Cylinder engines.Can find out, in figure, show be distribution rotor oil input channel 23 intermediate fuel oils in distribution rotor 2 after distribution rotor oil outlet 22 to distribution rotor goes out oil pocket 21, flow into the last fuel feeding of distribution stator the 1st cylinder oil outlet 11 that distributes on stator 1 to the corresponding oil feed line (not shown) of motor the 1st cylinder.When distribution rotor 2, distributing in stator 1 and doing when counter clockwise direction is rotated (in the present invention, all to rotate in a counter-clockwise direction and be described, lower same), distribution rotor goes out oil pocket 21 by being connected with distribution stator the 1st cylinder oil outlet 11, distribution stator the 5th cylinder oil outlet 15, distribution stator the 3rd cylinder oil outlet 13, distribution stator the 6th cylinder oil outlet 16, distribution stator the 4th cylinder oil outlet 14, distribution stator the 2nd cylinder oil outlet 12 successively, can realize by motor 1-5-3-6-4-2 fire ignition sequence intermittence fuel feeding.Distribution rotor goes out oil pocket 21 and is the maximum fuel feeding duration with the lasting phase place that each oil outlet distributing on stator 1 contacts.While being shown as motor the 1st oil supply cylinder in figure, other 5 cylinders are inoperative cylinder, by distribution rotor communicated cavity 24, they are communicated with, and carry out pressure balance, realize an identical initial oil condition that supplies.When distribution rotor goes out oil pocket 21 rotation when distributing stator the 1st cylinder oil outlet 11 not contact, residual high pressure fuel oil in oil feed line cannot reflux, only when distribution rotor communicated cavity 24 continues when rotation extremely contacts with distribution stator the 1st cylinder oil outlet 11 just can unload pressure balanced.Phase place between adjacent oil outlet is 360 °/i=360 °/6=60 °.
What Fig. 3 a, Fig. 3 b and Fig. 3 c showed is the radial and axial sectional view of distributor that adopts the principle of stratification for 6 Cylinder engines.Distribute the oil outlet on stator 1 to be divided into N=2 layer layout, every layer of uniform 3 oil outlet, i.e. uniform distribution stator oil outlet 11,13,14 on A-A cutting plane on the 1st layer, i.e. uniform distribution stator oil outlet 15,16,12 on B-B cutting plane on the 2nd layer.In distribution rotor 2, be designed with the radially oil outlet identical with distributing stator 1 layering quantity, on the 1st layer, be designed with the 1st layer of the 1st layer of oil outlet 22A of distribution rotor, distribution rotor and go out oil pocket 21A, the 1st layer of communicated cavity 24A of distribution rotor, on the 2nd layer, be designed with the 2nd layer of the 2nd layer of oil outlet 22B of distribution rotor, distribution rotor and go out oil pocket 21B, the 2nd layer of communicated cavity 24B of distribution rotor, in distribution rotor 2 two radially oil outlet 22A and 22B share an oil input channel, distribution rotor oil input channel 23.
Working principle is: when distribution rotor 2 is rotated in distribution stator 1, the 1st layer of distribution rotor go out oil pocket 21A first with distribute stator the 1st cylinder oil outlet 11 to be communicated with to carry out fuel feeding to corresponding oil feed line, now in all layerings, only have this place to realize connection fuel feeding.After 60 ° of distribution rotor 2 rotations, the 2nd layer of distribution rotor goes out oil pocket 21B and distributes stator the 5th cylinder oil outlet 15 to be communicated with to realize fuel feeding, now in all layerings, equally only have this place realization connection fuel feeding.In like manner, next will be communicated with fuel feeding: 21A and 13,21B and 16,21A and 14,21B and 12, layer-stepping fuel dispenser has been realized by the intermittent fuel feeding of motor 1-5-3-6-4-2 fire ignition sequence like this.The 2nd layer of communicated cavity 24B of the 1st layer of communicated cavity 24A of distribution rotor and distribution rotor, for the fuel oil between inoperative cylinder is communicated with, carries out pressure balance, realizes an identical initial oil condition that supplies.Can calculate phase place between the adjacent oil outlet in arbitrary layering and be 360 °/(i/N)=360 °/(6/2)=120 °.
From the foregoing, by hierarchical design of the present invention, distribute phase place between the adjacent oil outlet of stator than originally not layering obtained at double and promoted, layering distributor can provide, and effectively to utilize phase place be N times of not layering distributor.
The present invention is based on fuel feeding that above-mentioned layer-stepping fuel dispenser principle can provide and continue in situation that phase place T is multiplied, by a part in this phase place for fuel feeding, another part for direct oil return release to obtaining the good machine performance of joining.Therefore, by introducing two oil passage control valve devices, be that independent electronic control is carried out in injector control valve device 4 in Fig. 1 and fuel feeding and the oil return of 5 pairs of systems of oil return control valve device, the present invention is by adopting the oil passage control valve device of electronically controlled pilot valve pattern to control alternately, thereby realize this oil supply system to the timing of fuel injection quantity, quantitatively accurately control requirement, to obtaining good machine performance and the emission performance of joining.
Injector control valve device 4, oil return control valve device 5 integrated installations in housing 3 in corresponding mounting hole, and form a kind of threeway fuel feeding relation between distributor.Introduce the operational detail between this three below.
What Fig. 4 showed is the sectional view of injector control valve device and distributor.In injector control valve device 4, oil spout valve seat 41 is arranged in housing 3, and oil spout spool 42 is pressed on oil spout valve seat 41 in hermetically closing state by injection valve spring 43.The high pressure fuel of pressure accumulator assembly 7 enters after housing 3 in from Fig. 1, fuel oil is divided into two-way in Fig. 4, one road fuel oil is controlled oil duct 31 through injector control valve and is flowed in injector control valve control cavity volume A, and another road fuel oil flow to oil spout spool 42 bottoms through injector control valve oil input channel 32.When injector control valve solenoid valve 45 is not switched on, it is identical with oil spout spool 42 bottom fuel pressures that injector control valve is controlled cavity volume A intermediate fuel oil pressure, due to injector control valve control cavity volume A fuel oil produce downward hydraulic coupling and 43 precompression of injection valve spring produce downward spring force make a concerted effort be greater than oil spout spool 42 bottom fuel oils and produce the hydraulic coupling making progress, oil spout spool 42 is pressed on oil spout valve seat 41.When 45 energising of injector control valve solenoid valve, sealed steel ball 44 upwards lifts, injector control valve is controlled cavity volume A intermediate fuel oil pressure and can be declined rapidly, cause injector control valve control cavity volume A intermediate fuel oil produce downward hydraulic coupling and 43 precompression of injection valve spring produce downward spring force make a concerted effort be less than oil spout spool 42 bottom fuel oils and produce the hydraulic coupling making progress, oil spout spool 42 can move upward rapidly, open oil circuit, high pressure fuel enters in injector control valve shoe cream room B, then flows to distributor through injector control valve oil road 33.
The actuating device adopting in injector control valve solenoid valve 45 in injector control valve device 4, similar with the orifice structure in electric-controlled fuel injector in high-pressure common rail oil supply system, this is known configurations, the present invention utilizes this orifice plate, combined with the delivery valve matching parts structure in conventional high-tension inline pump, formation has the up and down dynamic formula oil route controller of the height response of fluid power amplification effect, has control accuracy high, respond the features such as fast, can realize the rapid triggering when distributor needs fuel oil.
What Fig. 5 showed is the sectional view of oil return control valve device and distributor.In oil return control valve device 5, oil return valve seat 52 is arranged in housing 3, and oil return spool 51 is because the effect of scavenger valve spring 53 and oil return valve seat 52 are in hermetically closing state.Injector control valve oil road 33 intermediate fuel oils are supplied to fuel oil outside distribution rotor oil input channel through distributor annular chamber C on the one hand, and injector control valve oil road 33 intermediate fuel oils also can flow to (threeway oil circuit relation) in oil return control valve shoe cream room D through distributor annular chamber C, oil return control valve oil input channel 34.Oil return control valve device 5 is coordinated 4 work of injector control valve device, and the working state that its joint work forms is as follows:
Original state: Fig. 4 injector control valve device 4 and the equal power-off of Fig. 5 oil return control valve device 5.Now oil spout spool 42 is closed, accumulator mesohigh fuel oil cannot enter among distributor, and oil return spool 51 is because of active force biased downward and the oil return valve seat 52 formation fuel flow path of scavenger valve spring 53, like this distributor particularly the fuel oil in high-pressure oil passage all can flow in oil return pressure stabilizing cavity E through this oil circuit, if oil return pressure stabilizing cavity E intermediate fuel oil overpressure, while being greater than the cracking pressure of return pressure assembly (signal of Fig. 5 dotted line place) setting, return pressure assembly will be opened oil return pressure stabilizing cavity E intermediate fuel oil is carried out to release, until pressure decreased is to the cracking pressure of setting.
Supply oil condition: 4 energisings of Fig. 4 injector control valve device, 5 energisings of Fig. 5 oil return control valve device.Fig. 1 pressure accumulator assembly 7 mesohigh fuel oils flow in distributor through injector control valve oil input channel 32, injector control valve shoe cream room B, injector control valve oil road 33 like this, although distributor, injector control valve device 4, oil return control valve device 5 is threeway relation,
But now oil return control valve device 5 energisings, oil return spool 51 moves upward because electromagnetic force reason overcomes 53 effects of scavenger valve spring, in closed condition, be that oil return control valve shoe cream room D intermediate fuel oil cannot flow in oil return pressure stabilizing cavity E, through the fuel oil of injector control valve oil road 33, will all flow to distributor like this and use and distribute fuel feeding.
Oil return state: consistent with original state, i.e. injector control valve device 4 and the equal power-off of oil return control valve device 5.Oil return spool 51 is opened way to cycle oil under 53 effects of scavenger valve spring, because now distribution rotor goes out oil pocket and is still communicated with distributing stator oil outlet, therefore can to distributor particularly in the system such as high-pressure oil pipe residual fuel oil carry out oil return release, realize oil sprayer and stop the clear-cut object of oil.
Sealing state: when distribution rotor goes out oil pocket and distributes stator oil outlet not to be communicated with, in sealing state.Now distributor cannot be supplied fuel oil to oil sprayer.
The injection types forming is as follows:
Main injection: oil return control valve device guarantees that prior to 4 energisings of injector control valve device oil return spool 51 is in closed condition 5 current"on"times, and high pressure fuel will all be supplied to distributor like this; When 5 current"on"times of oil return control valve device are slightly late than 4 current"on"times of injector control valve device, high pressure fuel is except through distributor distribution like this, and part fuel oil carries out oil return in addition, can change like this initial stage fuel injection characteristic of oil sprayer; When oil return control valve device 5 power-off times are slightly more Zao than injector control valve device 4 power-off times, get final product so early oil return, can change the fuel injection characteristic in latter stage of oil sprayer.
Rear injection: after 4 power-off of injector control valve device, in distributor and high-pressure oil pipe, still remain high pressure fuel, when carrying out oil return release after 5 power-off of oil return control valve device, again by 5 energisings of oil return control valve device, if make now residual fuel oil pressure higher than injection pressure of injector, can realize oil sprayer and again open, spray afterwards.
Safe injection: when system is during in above-mentioned sealing state, now distributor cannot dispense fuel.At this moment injector control valve device 4 and oil return control valve 5 are all switched on, high pressure fuel in pressure accumulator assembly 7 will, among injector control valve oil input channel 32, injector control valve shoe cream room B, injector control valve oil road 33, distributor annular chamber C, oil return control valve oil input channel 34, oil return control valve shoe cream room D, oil return voltage stabilizing cavity volume E, oil return control valve oil road 35 directly flow back to fuel tank, be realized the safety protection of overpressure in pressure accumulator assembly 7.
Walk lamely and spray: when pressure accumulator assembly 7 intermediate fuel oil pressure need to reduce because fault continues rising, except can be the oil return of oil return state, can utilize in main injection early 5 power-off to oil return control valve to carry out many oil returns, also can utilize safe injection to carry out many oil returns, realize the crippled driving functions of going home.
From each working state of the invention described above and injection types, can find out, phase place between the abundant two adjacent cylinder that its realization mechanism is to obtain after the layering of layer-stepping fuel dispenser, and introduce the mutual control of two separate electronically controlled oil route controllers formation threeway oil circuit relations based on this, thereby formed the fuel feeding characteristic of this oil supply system.
What Fig. 6 showed is the cooling sectional view of injector control valve device 4.When distribution rotor 2 rotatablely moves in distributing stator 1, distribution rotor oil input channel 23 openings are at free end, this distolateral fuel oil, it is in the fuel-displaced side shoe cream room of oil transfer pump F that the seepage fuel oil of distribution stator 1 and distribution rotor 2 matching gaps will be drawn towards low-pressure cavity, the fuel-displaced side shoe cream room of oil transfer pump F intermediate fuel oil is with inferior to high-pressure oil feed pump assembly fuel feeding order, through cooling oil input channel 36, cooling oil road 37 is realized the pressure of the cooling especially injector control valve of a ∩ shape oil circuit solenoid valve 45 of injector control valve device 4 formation cooling, therefore play the fuel oil after the pressurization of shunting oil transfer pump, be equivalent to adopt the step scavenger valve device in the common rail system of metering valve oil-feed.In addition, in figure, cooling oil road 37 cooling oil paths can also play the effect of collecting injector control valve device 4 seepage fuel oils.
What Fig. 7 showed is Fig. 1 mesohigh oil feed pump assembly 8 stereograms.The preferential high-pressure oil feed pump assembly that adopts two cylinder inline pump patterns in the present invention, the fuel oil coming from oil transfer pump oil outlet enters through filler opening 87, part fuel oil is driven and is formed high pressure fuel by camshaft 82 after inlet metering valve 84, high pressure fuel compensates to the pressure accumulator assembly 7 in Fig. 1 through high pressure oil outlet 85, and redundance fuel oil is among flow-off 86 flows back to fuel tank.Judgement sensor 83 is installed for system ECU judgement the 1st cylinder in the pump housing 81 fronts.Figure convexity wheel shaft drive end 821 is on right side, and camshaft free end 822 is in left side, and it is for driving distribution rotor 2 and its coaxially to rotate with rotating speed.Housing 3 stationary planes and pump housing free end attachment face 811 are installed fixing.Housing 3, distributor, oil transfer pump 6, the pump housing 81 form corresponding oil transfer pump sealed volume, and oil transfer pump 6 is integrated in camshaft free end 822 places, as shown in Figure 8 a.
What Fig. 8 a showed is the installation connection of camshaft 82, oil transfer pump 6, distributor.In Fig. 1, oil transfer pump 6 is inside engaged gear structures, oil transfer pump lining 61, oil transfer pump external rotor 62, oil transfer pump internal rotor 63, consists of, and oil transfer pump internal rotor 63 integrated installations are on the camshaft 82 of Fig. 8 a.The distribution rotor 2 rotating in distributing stator 1, drives by " cross recess " contiguous block 9 as shown in Figure 8 b, then drives contiguous block 9 rotations by camshaft 82.Therefore, distribution rotor 2, contiguous block 9, oil transfer pump internal rotor 63 are done with speed ratio coaxial rotating with camshaft 82, so distributor dispense fuel phase place is synchronizeed with camshaft 82, it is identical with engine crankshaft speed ratio with crank phase speed ratio and camshaft.Distribution rotor 2 and 1 seepage fuel oil of distribution stator will flow to contiguous block 9 places, and oil transfer pump 6, distributor, 3 of housings form a low-pressure cavity, flow in the fuel-displaced side shell of the oil transfer pump oil pocket F shown in Fig. 6, in order to force cooling spray oil control valve device 4.
That Fig. 9 shows is the overall perspective view embodiment of coupling 6 Cylinder engines of the present invention.Be provided with 6 fuel oil out splice going splices, in corresponding diagram 3a and Fig. 3 b, two-layer 6 are distributed stator oil outlet.To 6 engine mechanical oil sprayer fuel feeding work, this is common practise, slightly.
In this oil supply system, also include a pressure accumulator assembly 7, it is for building up from the next high pressure fuel of the outlet of high pressure oil shown in Fig. 7 85 compensation, form a stable pressure source, by a high-pressure oil pipe, be connected to housing 3 again, after controlling to the injector control valve device 4 through shown in Fig. 4, fuel feeding is to distributor, thereby can improve the average effective charge oil pressure of system.In the present invention, pressure accumulator assembly 7 adopts independent pattern, can preferentially be fixed on motor.Pressure accumulator assembly 7 is common practise, no longer describes in detail.
Oil supply system of the present invention is electronic control type oil supply system, coordinates the specific works principle of executive component and distributor below in conjunction with Fig. 1, Fig. 3 a, Fig. 3 b, Fig. 4, Fig. 5, Fig. 8 a, Figure 10, Figure 11 a, Figure 11 b, the detailed introducing system ECU of Figure 11 c, Figure 11 d.
What Figure 10 showed is the automatically controlled phase diagram of the present invention.Multiple tooth signal in Fig. 1 on cylinder identification sensor 83 collection camshafts 82 1., after collecting this multiple tooth signal, system ECU can judge which cylinder is as motor the 1st cylinder, and this signal is combined with starting crankshaft signal, this is automatically controlled oil supply system common practise, no longer describes in detail.In the present invention, system ECU also controls injector control valve signal, oil return control valve signal, inlet metering valve signal in addition.
Figure 11 a is distribution rotor polyphase decomposition figure.After relevant employing layer-stepping fuel dispenser as described above, the phase place utilized between two adjacent cylinder is multiplied, and this figure has shown that polyphase decomposition utilizes situation in detail.Wherein T0 is fuel supply advance angle, and T1 is the maximum fuel feeding duration, and T2 is the available oil return duration, wherein under the T1 normal conditions finish time, is T2 zero hour (completely different from Fig. 2 a, Fig. 2 b principle).
Figure 11 b, Figure 11 c, Figure 11 d are three kinds of working state sectional views of distributor.Wherein Figure 11 b is working state not, and Figure 11 c is for for oil condition, and Figure 11 d is oil return state.
Because distributor is by camshaft actuated, as shown in Figure 8 a, therefore require multiple tooth signal on distribution rotor 2 and the camshaft phase place between 1. to have strict machinery to guarantee, guarantee when system ECU is judged to be the 1st oil supply cylinder, in Fig. 3 b, distribution rotor goes out oil pocket 21A and must be connected with distributing stator the 1st cylinder oil outlet 11.
As shown in Figure 11 b, now in working state not, in Fig. 3 a and Fig. 3 b, in arbitrary layering, distribution rotor goes out oil pocket and is not all communicated with distributing stator oil outlet in arbitrary layering, and distributor cannot dispense fuel.When distribution rotor, rotate and arrive as Figure 11 c position, distribution rotor goes out oil pocket and is communicated with distributing stator oil outlet, if Fig. 4 injector control valve device 4 is all switched on Fig. 5 oil return control valve device 5, be that when in Figure 10,4. 2. injector control valve signal trigger with oil return control valve signal, high pressure fuel can distribute fuel feeding through distributor.The mechanical phase that the maximum available phases triggering before top dead center can be installed by distribution rotor 2 in Fig. 8 a and camshaft 82 guarantees when design, fuel supply advance angle T0 in Figure 11 a, 2. Figure 10 signal triggers time point ability when budc T0 useful (more early triggering distributor in sealing state) the earliest.When 4 power-off of Fig. 4 injector control valve device, 3. injector control valve signal triggers, signal 2. and the period of signal between be 3. the fuel feeding endurance, the T1 falling within Figure 11 a is interval, when 3. signal triggers, general Fig. 5 oil return control valve device 5 power-off, 5. oil return control valve signal triggers, oil return circuit is opened oil return release, 5. signal goes out oil pocket to distribution rotor and throws off for the available oil return endurance with distributing stator oil outlet, as the available oil return duration T2 in Figure 11 a, and T2 is more favourable to oil return release more greatly, and favourable to state consistent with each other between inoperative cylinder.
What in Figure 10, inlet metering valve signal showed is that system ECU controls the work of inlet metering valve with PWM ripple.After 2. injector control valve signal triggers, because the 7 mesohigh fuel oils of pressure accumulator assembly in Fig. 1 flow out a part, its pressure decreased, system ECU will control the aperture of inlet metering valve 84, carry appropriate fuel oil to pressurize post-compensation to pressure accumulator assembly 7 to high-pressure oil feed pump assembly 8, the pressure transducer 71 of installing on it transmits signal to ECU and plays aux. pressure control, and these are common practise, and its principle is no longer described in detail in detail.
Carry out oil supply system join the situations such as machine performance or emissions object consideration time, the change fuel injection characteristic in main injection as mentioned above, this just requires the signal in Figure 10 2. and 4. or 3. and 5. can asynchronous triggering to realize.When some special operation condition, 2. safe injection as mentioned above, need to not carry out signal and 5. trigger so that oil return reduces accumulator pressure under working state at Figure 11 b.
Claims (7)
1. a pressure accumulation type oil supply system that adopts layer-stepping fuel dispenser, is characterized in that: it comprises hydraulic injection device, the layer-stepping fuel dispenser, housing (3), injector control valve device (4), oil return control valve device (5), pressure accumulator assembly (7), high-pressure oil feed pump assembly (8), oil transfer pump (6), the system ECU that distribution stator (1) and distribution rotor (2), consist of, described distribution rotor (2) is arranged on the layer-stepping fuel dispenser forming in described distribution stator (1) and is arranged in described housing (3), described oil transfer pump (6) and distribution rotor (2) rotation of synchronizeing by being arranged on interior camshaft (82) driving of described high-pressure oil feed pump assembly (8), oil transfer pump (6) pressurizes fuel oil export pressure accumulator assembly (7) to by high-pressure oil feed pump assembly (8) after being arranged on the metering of inlet metering valve (84) on high-pressure oil feed pump assembly (8), through injector control valve device (4) and mutual control of oil return control valve device (5), be layer-stepping fuel dispenser fuel feeding and oil return again, this layer-stepping fuel dispenser is to hydraulic injection device fuel feeding, described system ECU is used for controlling injector control valve device (4), oil return control valve device (5) and inlet metering valve (84) work.
2. the pressure accumulation type oil supply system of employing layer-stepping fuel dispenser according to claim 1, it is characterized in that: described layer-stepping fuel dispenser is by distributing stator (1) and distribution rotor (2) to form, distributing stator (1) oil outlet to be divided into multilayer arranges, in distribution rotor (2), have the radial distribution rotor oil outlet identical with distributing divided stator number of plies amount, distribution rotor (2) oil input channel is also used as back oil road.
3. the pressure accumulation type oil supply system of employing layer-stepping fuel dispenser according to claim 1 and 2, it is characterized in that: the circulation of distribution rotor (2) oil input channel fuel oil is gone up and controlled to described injector control valve device (4) and oil return control valve device (5) integrated installation at housing (3), and what between layer-stepping fuel dispenser and injector control valve device (4), oil return control valve device (5), form is a kind of threeway oil circuit relation.
4. the pressure accumulation type oil supply system of employing layer-stepping fuel dispenser according to claim 1 and 2, it is characterized in that: described pressure accumulator assembly (7) adopts absolute construction, pressure transducer (71) is installed on it, in order to build up and temporarily store fuel oil and form a stable pressure source under preset pressure by pressure monitor sensor, this pressure source is connected directly to housing (3) and flows to injector control valve device (4) and oil return control valve device (5) from pressure accumulator assembly (7) by high-pressure oil pipe.
5. the pressure accumulation type oil supply system of employing layer-stepping fuel dispenser according to claim 1 and 2, is characterized in that: described high-pressure oil feed pump assembly (8) comprises the pump housing (81), camshaft (82), inlet metering valve (84), plunger; Be arranged on camshaft (82) oil transfer pump (6) upper and that driven by camshaft (82) and carry low pressure oil by being arranged on after upper inlet metering valve (84) measure control of controlling aperture through system ECU of the pump housing (81), by camshaft (82) drive plunger motion compresses, formed high pressure fuel and compensate to pressure accumulator assembly (7).
6. the fuel feeding pressure accumulation type system of employing layer-stepping fuel dispenser according to claim 5, is characterized in that: described high-pressure oil feed pump assembly (8) also comprises cylinder identification sensor (83); Distribute stator (1) to drive and rotate by camshaft (82), in each layering in distribution rotor (2), between oil outlet and oil outlet in corresponding each layering distributing on stator (1), become intermittent work state, by by the fire ignition sequence of motor, fuel oil being sent into oil sprayer successively after cylinder identification sensor (83) judgement motor the 1st cylinder; When distribution rotor (2) oil pump capacity reaches after target oil mass, by system ECU, control oil return control valve device (5) power-off and open oil circuit, the residual fuel oil in the distributor high-pressure oil pipe oil circuit that particularly oil sprayer is connected with distributor is back to fuel tank and carries out release.
7. the pressure accumulation type oil supply system of employing layer-stepping fuel dispenser according to claim 1 and 2, is characterized in that: described injector control valve device comprises oil spout valve seat (41), oil spout spool (42), injection valve spring (43), sealed steel ball (44) and controls solenoid valve (45); Oil spout valve seat (41) is arranged in housing, and it is upper in hermetically closing state that oil spout spool (42) is pressed on oil spout valve seat (41) by injection valve spring (43); Fuel oil in-line is divided into two-way, and a road is that injector control valve control oil duct communicates with being positioned at oil spout spool (42) top injector control valve control cavity volume A, and another road is that injector control valve oil input channel communicates with oil spout spool (42) bottom.
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| CN201310648687.5A CN103644059B (en) | 2013-12-05 | 2013-12-05 | A kind of pressure accumulation type oil supply system that adopts layer-stepping fuel dispenser |
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| CN201310648687.5A CN103644059B (en) | 2013-12-05 | 2013-12-05 | A kind of pressure accumulation type oil supply system that adopts layer-stepping fuel dispenser |
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| CN103644059B CN103644059B (en) | 2016-05-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895716A (en) * | 2015-04-15 | 2015-09-09 | 北京航科发动机控制***科技有限公司 | Fuel oil storage device for fuel oil distributor |
| CN114439662A (en) * | 2022-02-22 | 2022-05-06 | 一汽解放汽车有限公司 | Switching valve and common rail system |
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| CN1111065A (en) * | 1993-05-06 | 1995-11-01 | 卡明斯发动机公司 | Compact high performance fuel syste with accumulator |
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| US4462371A (en) * | 1979-09-08 | 1984-07-31 | Lucas Industries Limited | Fuel pumping apparatus |
| DE3346799A1 (en) * | 1982-12-26 | 1984-06-28 | Nippondenso Co., Ltd., Kariya, Aichi | DISTRIBUTOR FUEL INJECTION PUMP |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104895716A (en) * | 2015-04-15 | 2015-09-09 | 北京航科发动机控制***科技有限公司 | Fuel oil storage device for fuel oil distributor |
| CN114439662A (en) * | 2022-02-22 | 2022-05-06 | 一汽解放汽车有限公司 | Switching valve and common rail system |
| CN114439662B (en) * | 2022-02-22 | 2023-04-18 | 一汽解放汽车有限公司 | Switching valve and common rail system |
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| CN103644059B (en) | 2016-05-04 |
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