CN102287302A - High-pressure common rail electrical control oil sprayer - Google Patents
High-pressure common rail electrical control oil sprayer Download PDFInfo
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- CN102287302A CN102287302A CN2010102145420A CN201010214542A CN102287302A CN 102287302 A CN102287302 A CN 102287302A CN 2010102145420 A CN2010102145420 A CN 2010102145420A CN 201010214542 A CN201010214542 A CN 201010214542A CN 102287302 A CN102287302 A CN 102287302A
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Abstract
The invention relates to a high-pressure common rail electrical control oil sprayer which is the most important and most complicated part in a high-pressure common rail electrical spray diesel engine fuel system. According to the invention, a pressure retaining valve is arranged between an oil return channel 13 of the electrical control oil sprayer and an upper working chamber 23a of a pilot valve, and the upper working chamber 23 of the pilot valve is separated from the oil return channel 13. The liquid pressure intensity of the upper working chamber 23 of the pilot valve is improved through the pressure retaining valve, so that the liquid pressure intensity difference between the upper working chamber 23 of the pilot valve and a lower working chamber 22 of the pilot valve is reduced. When a pilot valve seat hole 11a is closed under the pressure action of a pilot valve reset spring 21, an armature pilot valve core 12 which is arranged in the upper working chamber 23 of the pilot valve reduces the joint force of the high-pressure liquid of the upper working chamber 23 of the pilot valve and the lower working chamber 22 of the pilot valve which acts on the armature pilot valve core 12, so that the action force for an electromagnetic coil 20 to lift the armature pilot valve core 12 and the processing and manufacturing difficulty of the electrical control oil sprayer are reduced.
Description
Technical field:
The present invention relates to a kind of of diesel oil electronic fuel injection engine high pressure common rail electric control fuel injector, promptly a kind of diesel engine high-pressure co-rail electric-controlled fuel injector
It specifically is a kind of electronic injection diesel engine high pressure common rail electric control fuel injector.
Technical background:
Along with putting teeth in of automobile state three Abgasgesetzs, automobile all must assemble electric spraying diesel engine or the EFI petrol engine that satisfies state three, state's four emission requests.
The diesel engine high-pressure co-rail system can realize the function that can't realize in traditional injection system, and its advantage has:
A. the injection pressure flexibility in the common rail system is adjustable, can determine required best jet pressure to different operating modes, thereby optimizes the diesel engine combination property.
B. Flexible Control injection timing independently cooperates high jet pressure (120MPa-160MPa), can control NOx and particulate (PM) simultaneously in less numerical value, to satisfy emission request.
C. the Flexible Control injection rate changes, and the fuel injection characteristic of realizing ideal realizes pre-spray and multi-injection easily, both can reduce Diesel NOx, can guarantee good power character and Economy again.
D. by the electromagnetic valve oil spout, its control accuracy is higher, and can not occur bubble and residual voltage in the high-pressure oil passage is zero phenomenon, therefore in the diesel engine operating range, the circulating fuel injection quantity change is little, and each oil supply cylinder is inhomogeneous can to improve, thereby alleviates the vibration of diesel engine and reduce discharging.
The diesel engine high-pressure co-rail system is made up of high-pressure service pump, spray bar, high-pressure accumulator (rail altogether), electric-controlled fuel injector, electronic control unit and sensor and final controlling element.The joint-track type injection system mainly is that the generation of jet pressure and course of injection is completely separate from each other, by the oil pressure in the common rail pipe being realized accurately control, makes the high pressure pipe pressure size irrelevant substantially with the rotating speed of motor.
Electric-controlled fuel injector is most critical and the most complicated parts in the joint-track type oil-fired system, the control signal that its effect is sent according to ECU, by the opening and closing of control electromagnetic valve, the fuel oil in the high pressure oil rail is sprayed into the firing chamber of diesel engine with injection timing, fuel injection quantity and the fuel injection rate of the best.
Electronic control unit utilizes the width of automatically controlled pulse to control the time that oil sprayer is opened oil spout at every turn, thus the control fuel injection quantity.Automatically controlled pulse is called pulse width from the time that rises to falling and continue.If the pulse width of ECU (Electrical Control Unit) output is little, then injection duration is short, and fuel injection quantity is few; If the pulse width of ECU (Electrical Control Unit) output is big, then injection duration is long, and fuel injection quantity is many;
Electric-controlled fuel injector can accurately be regulated the amount of fuel that sprays into combustion chamber of air cylinder.Be installed in the interior solenoid valve of each oil injector body and can realize the accurate electronic control of oil-fuel injector needle-valve opening and closing.
Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 theory structure schematic representation all are the cylinder axial sections.
Present existing electrically controlled injector is made of oil sprayer main valve, pilot valve, ECU (Electrical Control Unit).
The electric-controlled fuel injector main valve comprises active chamber 22, valve core of main valve piston mandril 2, main valve needle 5 and nozzle opening 6 under high-pressure oil passage 7, high-pressure oil passage 8, fuel injection chamber 4, the pilot valve.Be used for the fuel injection firing chamber of motivation of setting out.Nozzle opening 6 is closed by main valve needle 5 usually, and main valve needle 5 has cone point, is used for poor the engaging of conical points with nozzle opening 6.Main valve needle 5 is done upper and lower motion under the control of electromagnetic coil 20 and pilot valve, open, close nozzle opening 6.
Pilot valve is made up of No. 1 throttle orifice 10 of pilot valve, No. 2 throttle orifices 11 of pilot valve, pilot valve valve seat orifice 11a, armature pilot valve core 12 and pilot valve core bulb 24, pilot valve Returnning spring 21 etc.
The structure of pilot valve has various ways, also can be made up of No. 1 throttle orifice 10 of pilot valve, No. 2 throttle orifices 11 of pilot valve, pilot valve valve seat orifice 11a, armature pilot valve core 12 and pilot valve core headgear 27, pilot valve column base 25, pilot valve Returnning spring 21 etc. pilot valve.
ECU (Electrical Control Unit) is made up of electromagnetic coil 20 and armature pilot valve core 12.
During the electric-controlled fuel injector oil spout, high pressure fuel enters fuel injection chamber 4 from high pressure oil inlet 9, a tunnel through high-pressure oil passage 8 and high-pressure oil passage 7, flows to nozzle opening 6, sprays into the firing chamber; One the tunnel flows into active chamber 22 under the pilot valves through No. 1 throttle orifice of pilot valve 10, flows to active chamber 23 on the pilot valve through No. 2 throttle orifices 12 of pilot valve again, and through drainback passage 13, flows back to fuel tank.
When the electromagnetic valve coil 20 of electric-controlled fuel injector is not powered, armature pilot valve core 12 is under the effect of pilot valve Returnning spring 21, close pilot valve valve seat orifice 11a, the pressure of active chamber 22 rises rapidly under the pilot valve, and finally reach with the pressure of fuel injection chamber 4 and equate, because of the axial frontal projected area of the upper-end surface 2a of valve core of main valve piston mandril 2 greater than the shoulder of the valve core of main valve in the fuel injection chamber 4 face 5a (significant surface) axial frontal projected area, therefore the highly pressurised liquid pressure that acts on upper-end surface 2a acts on the pressure of shoulder face 5a greater than highly pressurised liquid, valve core of main valve piston mandril 2 moves downward and promotes main valve needle 5, closes oil sprayer.
When the electromagnetic valve coil 20 of giving electric-controlled fuel injector is powered, armature pilot valve core 12 is under the effect of coil magnetic force, overcome the pressure of pilot valve Returnning spring 21, move upward, open pilot valve valve seat orifice 11a, the highly pressurised liquid of active chamber 22 flows to active chamber 23 on the pilot valve through No. 2 throttle orifices 11 of pilot valve and pilot valve valve seat orifice 11a under the pilot valve.Because the liquid passing capacity of No. 2 throttle orifices 11 of pilot valve is greater than the liquid passing capacity of No. 1 throttle orifice 10 of pilot valve, the pressure of active chamber 22 descends rapidly under the pilot valve, the pressure of liquid effects 2a above the valve core of main valve piston mandril descends rapidly, therefore the highly pressurised liquid in the fuel injection chamber 4 acts on the pressure of valve core of main valve pin shoulder face 5a, promoting valve core of main valve piston mandril 2 moves upward, drive main valve needle 5 and move upward, open oil sprayer.High pressure oil is sprayed into the firing chamber.
Present oil sprayer is owing to active chamber 23 on the pilot valve directly communicates with drainback passage 13, and the liquid pressure P2 on the pilot valve in the active chamber 23 almost equates with atmospheric pressure.When pilot valve seat hole 11a closed in the ban, the pressure P1 of active chamber 22 rose rapidly under the pilot valve, and finally equated with high-pressure oil feed pressure.That is to say the liquid pressure that acts on the armature pilot valve core 12, the feed flow pressure of high pressure liquid no better than, therefore be 130MPa---160MPa, act on the feed flow pressure that fluid pressure on the pilot valve core bulb 24 equals high pressure liquid and multiply by pilot valve valve seat orifice 11a place by the axial frontal projected area of 24 of the pilot valve core bulbs of high pressure liquid effect.The magnetic force of electromagnetic coil is limited, for guaranteeing the proper functioning of oil sprayer, when the design electric-controlled fuel injector, will be under the prerequisite that satisfies the principle requirement, reduce No. 2 throttle orifices of pilot valve 11 liquid passing capacities as far as possible, also just must reduce the section area of No. 1 throttle orifice 10 of pilot valve, just can make the hole area of pilot valve valve opening seat 11a as much as possible little, so just can reduce the power that highly pressurised liquid acts on pilot valve valve ball 24, just high pressure liquid thrust that armature pilot valve core 12 is made progress.Closing of pilot valve is to overcome highly pressurised liquid under the effect by pilot valve Returnning spring 21 to act on the thrust that armature pilot valve core 12 makes progress, and closes pilot valve valve seat orifice 11a, closes pilot valve.Pilot valve is opened in 20 energisings of oil sprayer electromagnetic coil, must overcome the pressure of pilot valve Returnning spring 21, and just high pressure liquid is to the thrust of armature pilot valve core 12.
The fuel feeding pressure of high pressure co-rail system up to 160MPa about, high-voltage oil liquid acts on the pressure of every square millimeter of area up to 16 kilograms, though existing electric-controlled fuel injector has all adopted the opening and closing of pilot valve control main valve needle, to reduce the suction requirement of electromagnet, but because the pressure of fluid is too high, electromagnetic coil must have sizable magnetic force, could satisfy the functional requirement of electric-controlled fuel injector.
Therefore, there is following problem in the oil sprayer that uses at present:
1, the magnetic force of electromagnetic coil is limited, production small volume, the coil that suction is big, and the production and processing difficulty is big.
2, the aperture of No. 1 throttle orifice 10 of pilot valve and No. 2 throttle orifices 11 of pilot valve is very little, processing difficulties;
3, the aperture of No. 1 throttle orifice 10 of pilot valve and No. 2 throttle orifices 11 of pilot valve is very little, and is high to the oil requirement of fuel oil during use, and often causes gambling plug fault.
Because the existence of above problem, the manufacturing technology of existing electric-controlled fuel injector are still by the control of external several companies.For solving above-mentioned technical barrier, reduce the manufacture difficulty of electric-controlled fuel injector, invented this electric-controlled fuel injector.
Summary of the invention:
A kind of high pressure common rail electric control fuel injector of the present invention also is to be made of oil sprayer main valve, pilot valve, ECU (Electrical Control Unit) etc., its key is to be provided with pressure retaining valve between the active chamber 23a on drainback passage 13 and the pilot valve, and active chamber on the pilot valve 23 and drainback passage 13 are separated.
The principle of work and power of pressure retaining valve mainly is made up of the nut 18 and the pressure spring 19 of valve seat 14, spool 16, band center hole.Pressure retaining valve links to each other with active chamber 23a on the pilot valve near an end of valve seat 14, end of nut 18 near the band center hole links to each other with drainback passage 13, and its key is to make the liquid pressure of active chamber 23 on coupled two chambeies----drainback passage 13 and the pilot valve different.The pressure spring 19 of pressure retaining valve is pressed to valve seat 14 to spool 16, and the through hole of valve seat 14 is closed.Has only liquid effects in the active chamber 23a on the pilot valve when the pressure of spool 16 acts on pressure on the spool 16 greater than pressure spring 19, liquid on the pilot valve in the active chamber 23a could push away valve seat 14 with spool 16, open pressure retaining valve, allow high pressure liquid active chamber 23 from the pilot valve flow to drainback passage 13.When the liquid effects of active chamber 23a on the pilot valve when the fluid pressure of spool 16 acts on pressure on the spool 16 less than pressure spring 19, spool 16 is pushed to valve seat 14 by spring, closes the through hole of valve seat 14, and pressure retaining valve cuts out.The liquid pressure in the active chamber 23 just remains on a constant pressure range on the pilot valve because the effect of pressure retaining valve makes like this.
The nut 18 of band center hole is used to adjust pressure spring 19 and acts on active force on the spool 16.Center hole is the passage of high pressure liquid stream through pressure retaining valve
Armature pilot valve core 12 and pilot valve core bulb 24 are one, place oneself in the midst of all on the pilot valve that pressure are in the liquid of P2 in the active chamber 23.Because the pressure of the fuel oil on the pilot valve in the active chamber 23 can be very high.Under same temperature conditions, because the pressure of liquid raises, the viscosity of fuel oil can increase, for overcoming armature pilot valve core 12 and the resistance to motion of pilot valve core bulb 24 in high pressure fuel, armature pilot valve core 12 and 24 designs of pilot valve core bulb are streamlined, to reduce its resistance to motion in high pressure fuel.The cylindrical section of armature pilot valve core 12, in the center bore of electromagnetic coil 20, and in the stroke range, the armature in electromagnetic coil 20 center bores all is cylindrical section.
On the pilot valve on active chamber 23a, the pilot valve center bore of active chamber 23 and electromagnetic coil 20 are hydraulic pressure cavity of a connection, the static pressure of highly pressurised liquid wherein equates, and all equals P2.
Owing to be provided with pressure retaining valve between the active chamber 23a on drainback passage 13 and the pilot valve, active chamber on the pilot valve 23 and drainback passage 13 to be kept apart, the liquid pressure on the pilot valve in the active chamber 23 remains in the pressure range of pressure retaining valve setting.When armature pilot valve core 12 is pushed pilot valve valve seat orifice 11a under the effect of pilot valve Returnning spring 21, when closing pilot valve valve seat orifice 11a, the pressure P1 of active chamber 22 rises rapidly under the pilot valve, and equates with high-pressure oil feed pressure.Active chamber 23 links to each other with pressure retaining valve on the pilot valve, because the effect of pressure retaining valve makes the maintenance of the liquid pressure in the active chamber 23 P2 on the pilot valve.Armature pilot valve core 12 and pilot valve core bulb 24 are one, place oneself in the midst of all on the pilot valve that pressure are in the liquid of P2 in the active chamber 23.When pilot valve core bulb 24 is closed pilot valve valve seat orifice 11a, the liquid pressure P1 of active chamber 22 acts on directed force F 1 on the pilot valve core bulb 24 and equals intracavity liquid pressure P1 and multiply by the area S of pilot valve valve seat orifice 11a near the frontal plane of projection S1 in the hole of pilot valve core bulb 24, i.e. F1=P1 * S under the pilot valve.Armature pilot valve core 12 and pilot valve core bulb 24 on pilot valve in the active chamber 23 pressure be in the liquid of P2, because the part that above the armature pilot valve core, equates near the area S of the axial frontal plane of projection S1 in the hole of pilot valve core bulb 24 with pilot valve valve seat orifice 11a in the axial orthographic projection of 12a, liquid effects on the pilot valve in the active chamber 23 all has the opposite corresponding surface of active force equal direction in the pressure of its lap of armature pilot valve core 12 and pilot valve core bulb 24, cancels out each other.Therefore, the power F2 that the highly pressurised liquid of active chamber 23 acts on armature pilot valve core 12 and pilot valve core bulb 24 on the pilot valve equals on the pilot valve that liquid pressure P2 multiply by the area S of pilot valve valve seat orifice 11a near the frontal plane of projection S1 in the hole of pilot valve core bulb 24, i.e. F2=P2 * S in the active chamber 23.
Learn by above-mentioned: when armature pilot valve core 12 is pushed pilot valve valve seat orifice 11a under the effect of pilot valve Returnning spring 21, close pilot valve valve seat orifice 11a, when promptly closing pilot valve, highly pressurised liquid on highly pressurised liquid under the pilot valve in the active chamber 22 and the pilot valve in the active chamber 23 acts on F=F1-F2=P1 * S-P2 * S=(the P1-P2) * S that makes a concerted effort of armature pilot valve core 12 and pilot valve core bulb 24, that is to say, reduce under the pilot valve closing pressure that the pressure difference between the active chamber 23 on the active chamber 22 and pilot valve also just reduces pilot valve Returnning spring 21.Finally reach and reduce electromagnetic coil 20 and mention the purpose that armature pilot valve core 12 is opened the active force of pilot valve.
When P2 equals zero (relative pressure), just active chamber 23 directly is connected with drainback passage 13 on the pilot valve, F=F1-F2=P1 * S-P2 * S=(P1-P2) * S=P1 * S that makes a concerted effort of armature pilot valve core 12 and pilot valve core bulb 24, liquid is to the active force maximum of armature pilot valve core 12 and pilot valve core bulb 24 at this moment.Along with the increase liquid of P2 can more and more little (pressure mentioned in this article be relative pressure) to the active force of armature pilot valve core 12 and pilot valve core bulb 24.
Therefore, use the high pressure common rail electric control fuel injector of this technology, the reduction that the magnetic force of electromagnetic coil can be suitable has also just reduced the difficulty of processing of coil; By optimal design, can suitably strengthen the aperture of No. 1 throttle orifice 10 of pilot valve and No. 2 throttle orifices 11 of pilot valve simultaneously, be convenient to processing.
Description of drawings:
A kind of high pressure common rail electric control fuel injector principle schematic of Fig. 1 the present invention
A kind of high pressure common rail electric control fuel injector figure of Fig. 2 the present invention principle schematic representation 2
A kind of high pressure common rail electric control fuel injector pilot valve of Fig. 3 the present invention principle schematic
A kind of high pressure common rail electric control fuel injector needle of Fig. 4 the present invention principle schematic
A kind of high pressure common rail electric control fuel injector structural representation of Fig. 5 the present invention oil injector body 1, valve core of main valve piston mandril 2,2a above the valve core of main valve piston mandril, main valve needle Returnning spring 3, fuel injection chamber 4, main valve needle 5, main valve needle shoulder face 5a, main valve needle cone-tip surface 5b, nozzle opening 6, high-pressure oil passage 7, high-pressure oil passage 8, high pressure oil inlet 9, No. 1 throttle orifice 10 of pilot valve, No. 2 throttle orifices 11 of pilot valve, pilot valve valve seat orifice 11a, armature pilot valve core 12,12a above the armature pilot valve core, drainback passage 13, valve seat 14, solenoid valve connector lug 15, spool 16, back leakage connection 17, the nut 18 of band center hole, pressure spring 19, electromagnetic coil 20, pilot valve Returnning spring 21, active chamber 22 under the pilot valve, active chamber 23 on the pilot valve, active chamber 23a on the pilot valve, pilot valve core bulb 24, pilot valve column base 25, pilot valve core headgear 27
Embodiment
Key of the present invention is be provided with pressure retaining valve between the active chamber 23a on drainback passage 13 and the pilot valve, and active chamber on the pilot valve 23 and drainback passage 13 are separated.The principle of work and power of pressure retaining valve mainly is made up of the nut 18 and the pressure spring 19 of valve seat 14, spool 16, band center hole.Pressure retaining valve links to each other with active chamber 23a on the pilot valve near an end of valve seat 14, end of nut 18 near the band center hole links to each other with drainback passage 13, and its key is to make the liquid pressure of active chamber 23 on coupled two chambeies-----drainback passage 13 and the pilot valve different.The pressure spring 19 of pressure retaining valve is pressed to valve seat 14 to spool 16, and the through hole of valve seat 14 is closed.When the liquid effects of having only active chamber 23a on the pilot valve acts on pressure on the spool 16 in the fluid pressure of spool 16 greater than pressure spring 19, the liquid of active chamber 23a could push away valve seat 14 with spool 16 on the pilot valve, open pressure retaining valve, allow high pressure liquid active chamber 23 from the pilot valve flow to drainback passage 13.When the liquid effects of active chamber 23a on the pilot valve is not enough to overcome pressure spring 19 when acting on pressure on the spool 16 in the fluid pressure of spool 16, spool 16 is pushed to valve seat 14 by spring, closes the through hole of valve seat 14, and pressure retaining valve cuts out.The liquid pressure in the active chamber 23 remains on a constant pressure range on the pilot valve because the effect of pressure retaining valve makes like this.
The effect of pressure retaining valve is that the liquid pressure in the active chamber on the pilot valve 23 is improved, it is poor also just to have reduced on the pilot valve under the liquid pressure in the active chamber 23 and pilot valve the liquid pressure in the active chamber 22, armature pilot valve core 12 on pilot valve in the active chamber 23 is closed under the situation of pilot valve valve seat orifice 11a under the pressure effect of pilot valve Returnning spring 21, reduced on the pilot valve that the highly pressurised liquid of active chamber 22 acts on making a concerted effort of armature pilot valve core 12 under the active chamber 23 and pilot valve, also just reduced the active force that electromagnetic coil 20 is mentioned armature pilot valve core 12.
Claims (4)
1. high pressure common rail electric control fuel injector, its key is be provided with pressure retaining valve between the active chamber 23a on drainback passage 13 and the pilot valve, active chamber on the pilot valve 23 and drainback passage 13 are separated, the effect of pressure retaining valve is that the liquid pressure in the active chamber on the pilot valve 23 is improved, it is poor also just to have reduced on the pilot valve under the liquid pressure in the active chamber 23 and pilot valve the liquid pressure in the active chamber 22, place the armature pilot valve cores 12 in the active chamber on the pilot valve 23 under the pressure effect of pilot valve Returnning spring 21, to close under the situation of pilot valve valve seat orifice 11a, reduced on the pilot valve that the highly pressurised liquid of active chamber 22 acts on making a concerted effort of armature pilot valve core 12 under the active chamber 23 and pilot valve, also just reduced the active force that electromagnetic coil 20 is mentioned armature pilot valve core 12.
2. the described pressure retaining valve of claim 1 is on drainback passage 13 and the pilot valve between the active chamber 23a, the feature of pressure retaining valve is that active chamber on the coupled logical pilot valve 23 and drainback passage 13 are separated, have only when the liquid pressure in the active chamber on the pilot valve 23 reaches the setting unlatching pressure of pressure retaining valve, highly pressurised liquid could be from active chamber on the pilot valve 23 active chamber 23a on pilot valve, flow to pressure retaining valve, open pressure retaining valve and flow into drainback passage 13, the pressure of active chamber 23 on the pilot valve is in case reduce, pressure retaining valve just cuts out, and the liquid of active chamber 23 just remains on certain pressure range on the pilot valve like this.
On the described pilot valve of claim 1 on active chamber 23a, the pilot valve center bore of active chamber 23 and electromagnetic coil 20 are hydraulic pressure cavity of a connection, the static pressure of highly pressurised liquid wherein equates that armature pilot valve core 12 is placed oneself in the midst of in the common hydraulic chamber that forms of three.
4. described armature pilot valve core 12 of claim 1 and pilot valve core bulb 24 are one, and be streamlined, in highly pressurised liquid, do the resistance to motion of axially reciprocating to reduce armature pilot valve core 12, and in the stroke range, armature pilot valve core 12 all is cylindrical section in the center bore of electromagnetic coil 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102145420A CN102287302A (en) | 2010-06-21 | 2010-06-21 | High-pressure common rail electrical control oil sprayer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102145420A CN102287302A (en) | 2010-06-21 | 2010-06-21 | High-pressure common rail electrical control oil sprayer |
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| CN102287302A true CN102287302A (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102145420A Pending CN102287302A (en) | 2010-06-21 | 2010-06-21 | High-pressure common rail electrical control oil sprayer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436240A (en) * | 2017-09-26 | 2017-12-05 | 重庆长安汽车股份有限公司 | Oily rail assembly monomer NVH method of evaluating performance |
| CN114607544A (en) * | 2020-12-09 | 2022-06-10 | 陕西理工大学 | Oil distribution rotary valve of high-pressure common rail engine and servo oil distribution method thereof |
-
2010
- 2010-06-21 CN CN2010102145420A patent/CN102287302A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436240A (en) * | 2017-09-26 | 2017-12-05 | 重庆长安汽车股份有限公司 | Oily rail assembly monomer NVH method of evaluating performance |
| CN107436240B (en) * | 2017-09-26 | 2019-03-22 | 重庆长安汽车股份有限公司 | Oily rail assembly monomer NVH method of evaluating performance |
| CN114607544A (en) * | 2020-12-09 | 2022-06-10 | 陕西理工大学 | Oil distribution rotary valve of high-pressure common rail engine and servo oil distribution method thereof |
| CN114607544B (en) * | 2020-12-09 | 2024-02-02 | 陕西理工大学 | Oil distribution rotary valve of high-pressure common rail engine and servo oil distribution method thereof |
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Application publication date: 20111221 |