CN105804827A - Piezoelectrically-controlled pressure-intensified valve system - Google Patents
Piezoelectrically-controlled pressure-intensified valve system Download PDFInfo
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- CN105804827A CN105804827A CN201610289350.3A CN201610289350A CN105804827A CN 105804827 A CN105804827 A CN 105804827A CN 201610289350 A CN201610289350 A CN 201610289350A CN 105804827 A CN105804827 A CN 105804827A
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- hydraulic oil
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 56
- 239000000446 fuel Substances 0.000 claims abstract description 26
- 239000003921 oil Substances 0.000 claims description 39
- 239000002828 fuel tank Substances 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 19
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
- F01L9/24—Piezoelectric actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0253—Fully variable control of valve lift and timing using camless actuation systems such as hydraulic, pneumatic or electromagnetic actuators, e.g. solenoid valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention aims to provide a Piezoelectrically-controlled pressure-intensified valve system. The system comprises a hydraulic oil track, a piezoelectric control part, a pressure intensifying piston, a control piston, a valve body, a valve, a shell and the like. The system provided by the invention has the advantages that by adopting the hydraulic oil track, the opening and closing instability of the valve, caused by the internal pressure fluctuation of the system, is remarkably reduced, so that the work reliability and the work consistency of the valve system are guaranteed; a ball valve is controlled to open or close a hydraulic oil circuit through the power on or off of the piezoelectric control part and hydraulic oil in a pressure intensifying cavity is pressurized by utilizing the pressure intensifying piston, so that the on-off between the valve and an air vent is realized, the valve timing and the valve duration angle can be effectively controlled; and the ball valve is directly driven through piezoelectric stacks and the valve law can be flexibly and accurately controlled, so that the realization of the flexible valve modes of an internal combustion engine under different working conditions is benefited, the valve control freedom degree is remarkably increased, the economy of fuels and the emission of the internal combustion engine can be further improved and the power performance of the internal combustion engine is increased.
Description
Technical field
The present invention relates to a kind of internal combustion engine, the specifically air distribution system of internal combustion engine.
Background technology
The Main Function of IC engine gas distribution device is, within the time of regulation, the waste gas after burning is discharged cylinder, and sucks the fresh air of q.s, and valve timing and distribution duration angle are great on impacts such as the economy of fuel oil, power of IC engine, burning and discharges.Application number a kind of electrically controlled gas valve executing mechanism that has been the patent disclosure of 200510041311.3, by housing, housing inner bottom part calutron, run through between the stroke adjustment screw rod of calutron axial central through hole, stroke adjustment screw rod upper end and housing inner top arrange de-noising spring constitute, this invention adopts electromagnetic switch directly to control valve opening and closing, electromagnetic valve actuating gear structure is complicated, solenoid inductance effect makes its response time delayed, causes that the control accuracy to valve is poor.The engine air distribution system of application number a kind of electro-hydraulic Comprehensive Control that has been the patent disclosure of 200810120557.3, including a valve stem, a hydraulic jack and hydraulic circuit, the piston rod of hydraulic jack is connected with valve stem, the oil circuit of oil-in and a reversal valve is connected, this reversal valve is connected with high-pressure oil passage, another road is connected with low tension loop, the conversion of reversal valve is controlled by an electromagnetic switch, the opening and closing controlling electromagnetic valve can be achieved with the opening and closing of valve, best distribution effect can be reached, but its electromagnetic valve switch still suffers from low-response and the deficiency of control accuracy difference.
Summary of the invention
It is an object of the invention to provide that port timing is easily controllable, distribution duration angle and valve stroke is easy to flexible, drive the piezoelectricity of changeable pressure to control booster-type air distribution system.
The object of the present invention is achieved like this:
Piezoelectricity of the present invention controls booster-type air distribution system, it is characterized in that: include distribution unit, hydraulic oil rail, fuel tank；nullDescribed distribution unit includes valve body、Piezoelectricity controls part、Valve、Shell，Described piezoelectricity control part includes piezoelectric pile、Push rod、Ball valve、Ball valve back-moving spring，Piezoelectric pile is arranged in valve body，Push rod chamber it is respectively provided with in valve body、High pressure fuel feed hole、High-low pressure through hole、Low pressure spill port、Ball valve chamber and ball valve back-moving spring chamber，Push rod is positioned in push rod chamber and is positioned at the lower section of piezoelectric pile，Ball valve is located in ball valve chamber，Ball valve chamber is positioned at below push rod chamber，Ball valve back-moving spring chamber is positioned at below ball valve chamber，Ball valve back-moving spring is arranged in ball valve back-moving spring chamber and is positioned at below ball valve，The position matched with ball valve in ball valve chamber upper end is the first sealed seat surface，The position matched with ball valve in ball valve chamber lower end is the second sealed seat surface，High pressure fuel feed hole is respectively communicated with push rod chamber and hydraulic oil rail，Low pressure spill port is respectively communicated with ball valve back-moving spring chamber and fuel tank，In the valve body of piezoelectricity control beneath portions, control chamber is set，High-low pressure through hole is respectively communicated with ball valve chamber and controls chamber，Control chamber and be arranged below charged piston，Charged piston is cased with charged piston back-moving spring，Charged piston is arranged below booster cavity，Booster cavity is by inlet line connection low pressure spill port，Inlet line is installed oil sucting one-way valve，Booster cavity is arranged below controlling piston，Control piston and connect valve，Valve is cased with valve return springs，Shell is arranged on below valve body，Valve seating is installed in the end of valve，Valve seating is positioned at outer side；The number of described distribution unit is consistent with the number of engine cylinder.
The present invention can also include:
1, the area of charged piston upper surface is more than the area of its lower surface.
2, when piezoelectricity control part is not powered on, piezoelectric pile keeps original length, ball valve back-moving spring compresses ball valve to the first sealed seat surface, boost fluid force feed flows into push rod chamber via high pressure fuel feed hole, second sealed seat surface is opened, the connection of high-low pressure through hole controls chamber and low pressure spill port, and valve seating is crushed on shell under the effect of valve return springs；After piezoelectricity controls partial current, piezoelectric pile anamorphic stretching, pushing down on push rod, ball valve moves downwardly together with push rod, and ball valve leaves the first sealed seat surface and seals the second sealed seat surface, high-low pressure through hole disconnects with low pressure spill port, high-low pressure through hole connects with high pressure fuel feed hole, the boost fluid force feed stream ramp metering chamber in hydraulic oil rail, and charged piston moves downward, controlling piston to move downwardly together with valve, valve seating leaves shell.
Present invention have an advantage that the present invention passes through piezoelectricity and controls part control system of switching on or off electricity ball valve displacement, realize the flexible control of the break-make to high-low pressure oil circuit and uninterrupted, and then control quantity delivered and the amount of releasing of intraluminal fluid force feed, by charged piston to the hydraulic oil supercharging in booster cavity, make to act on the hydraulic coupling controlled on piston to change flexibly, hydraulic valve opens and closes, thus the break-make realized between valve and blow vent, can effectively control valve timing and distribution duration angle；Hydraulic oil rail is adopted to significantly reduce the valve opening owing to the hydraulic oil pressure fluctuation caused when piezoelectricity controls the conversion of part high-low pressure oil circuit causes and close unstability, it is ensured that the reliability of air distribution system work and concordance；Ball valve is directly driven by piezoelectric pile, distribution rule can be accurately controlled flexibly, be conducive to the realization of flexible distribution mode under internal combustion engine difference operating mode, significantly improve valve control freedom degree, economy and the engine exhaust of fuel can be improved further, be conducive to improving the power performance of internal combustion engine.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
The piezoelectricity that Fig. 2 is the present invention controls partial schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
In conjunction with Fig. 1～2, one piezoelectricity of the present invention controls booster-type air distribution system, and it is controlled part 3, control chamber 4, charged piston 5, charged piston back-moving spring 6, oil sucting one-way valve 7, booster cavity 8, control piston 9, valve body 10, spring base 11, valve return springs 12, valve 13, shell 14, blow vent 15, valve seating 16, oil return pipe 17, fuel tank 18, filter 19 and hydraulic oil pump 20 formed by hydraulic oil rail 1, hydraulic oil pipe 2, piezoelectricity.Hydraulic oil rail 1 left end is connected with hydraulic oil pump 20, filter 19 and fuel tank 18 respectively by oil pipe, hydraulic oil rail 1 has multiple hydraulic oil outlet, the number of hydraulic oil outlet is determined according to the number of cylinder of internal-combustion engine, hydraulic oil outlet is connected with the hydraulic pressure oil-in having on valve body 10 by hydraulic oil pipe 2, and the low pressure oil return opening that valve body 10 has connects fuel tank 18 by oil return pipe 17.Electrical connector 21, piezoelectric pile 22, high pressure fuel feed hole the 23, first sealed seat surface 24, ball valve back-moving spring 25, high-low pressure through hole 26, low pressure spill port the 27, second sealed seat surface 28, ball valve 29 and push rod 30 together constitute piezoelectricity and control the piezoelectricity control part 3 of booster-type air distribution system.nullValve body 10 is respectively designed with high pressure fuel feed hole 23、First sealed seat surface 24、High-low pressure through hole 26、Low pressure spill port 27 and the second sealed seat surface 28，High pressure fuel feed hole 23 is connected with hydraulic pressure oil-in by the hydraulic oil channel on valve body 10，Low pressure spill port 27 is connected with low pressure oil return opening by the low pressure drainback passage on valve body 10，When ball valve 29 is compacted on the first sealed seat surface 24，High-low pressure through hole 26 connection controls chamber 4 and low pressure spill port 27，When ball valve 29 is compacted on the second sealed seat surface 28，High-low pressure through hole 26 connection controls chamber 4 and high pressure fuel feed hole 23，Piezoelectric pile 22 upper end is connected with internal-combustion engine electronic control unit by electrical connector 21，And then control lifting and taking a seat of ball valve 29，Ball valve 29 is compacted on push rod 30 by ball valve back-moving spring 25.Charged piston 5 upper end area is more than lower end area, formed between its upper end and valve body 10 and control chamber 4, controlling chamber 4 and connect high-low pressure through hole 26, form booster cavity 8 between lower end and control piston 9 and valve body 10, booster cavity 8 is connected with fuel tank 18 by oil sucting one-way valve 7.Control piston 9 and be arranged on valve 13 top, control piston 9 open and close with valve 13 and be synchronized with the movement with valve 13, spring base 11 is fixed on valve 13 by locating snap ring, and move together therewith, valve return springs 12 is pressed between spring base 11 and shell 14, and the motion lift of valve 13 is limited by valve seating 16.
Fig. 1 is the overall structure schematic diagram that piezoelectricity of the present invention controls booster-type air distribution system, controls part 3, control chamber 4, charged piston 5, charged piston back-moving spring 6, oil sucting one-way valve 7, booster cavity 8, control piston 9, valve body 10, spring base 11, valve return springs 12, valve 13, shell 14, blow vent 15, valve seating 16, oil return pipe 17, fuel tank 18, filter 19 and hydraulic oil pump 20 form including hydraulic oil rail 1, hydraulic oil pipe 2, piezoelectricity.Hydraulic oil rail 1 left end is connected with hydraulic oil pump 20, filter 19 and fuel tank 18 respectively by oil pipe, hydraulic oil rail 1 has multiple hydraulic oil outlet, the number of hydraulic oil outlet is determined according to the number of cylinder of internal-combustion engine, as shown in Figure 1, schematic diagram during for the present invention for four-cylinder internal combustion engine, hydraulic oil outlet is connected with the hydraulic pressure oil-in having on valve body 10 by hydraulic oil pipe 2, and the low pressure oil return opening that valve body 10 has connects fuel tank 18 by oil return pipe 17.Electrical connector 21, piezoelectric pile 22, high pressure fuel feed hole the 23, first sealed seat surface 24, ball valve back-moving spring 25, high-low pressure through hole 26, low pressure spill port the 27, second sealed seat surface 28, ball valve 29 and push rod 30 together constitute piezoelectricity and control the piezoelectricity control part 3 of booster-type air distribution system, as shown in Figure 2.nullValve body 10 is respectively designed with high pressure fuel feed hole 23、First sealed seat surface 24、High-low pressure through hole 26、Low pressure spill port 27 and the second sealed seat surface 28，High pressure fuel feed hole 23 is connected with hydraulic pressure oil-in by the hydraulic oil channel on valve body 10，Low pressure spill port 27 is connected with low pressure oil return opening by the low pressure drainback passage on valve body 10，When ball valve 29 is compacted on the first sealed seat surface 24，High-low pressure through hole 26 connection controls chamber 4 and low pressure spill port 27，When ball valve 29 is compacted on the second sealed seat surface 28，High-low pressure through hole 26 connection controls chamber 4 and high pressure fuel feed hole 23，Piezoelectric pile 22 upper end is connected with internal-combustion engine electronic control unit by electrical connector 21，And then control lifting and taking a seat of ball valve 29，Ball valve 29 is compacted on push rod 30 by ball valve back-moving spring 25.Charged piston 5 upper end area is more than lower end area, formed between its upper end and valve body 10 and control chamber 4, controlling chamber 4 and connect high-low pressure through hole 26, form booster cavity 8 between lower end and control piston 9 and valve body 10, booster cavity 8 is connected with fuel tank 18 by oil sucting one-way valve 7.Control piston 9 and be arranged on valve 13 top, control piston 9 open and close with valve 13 and be synchronized with the movement with valve 13, spring base 11 is fixed on valve 13 by locating snap ring, and move together therewith, valve return springs 12 is pressed between spring base 11 and shell 14, and the motion lift of valve 13 is limited by valve seating 16.nullAs shown in Figure 1，When the present invention is for four-cylinder internal combustion engine，Hydraulic oil flow in fuel tank 18 flows into filter 19 through oil pipe，Hydraulic oil after filtering passes through oil pipe influent pressure oil pump 20，And it is supercharged to certain pressure in hydraulic oil pump 20，The boost fluid force feed flowed out in hydraulic oil pump 20 is through oil pipe influent force feed rail 1，And be stored in hydraulic oil rail 1，Boost fluid force feed in hydraulic oil rail 1 flows through hydraulic oil pipe 2 and flows into hydraulic pressure oil inlet passage in valve body 10 via the hydraulic pressure oil-in having on valve body 10，When piezoelectricity control booster-type air distribution system piezoelectricity control part 3 is not powered on，Piezoelectric pile 22 keeps original length，Do not extend，Ball valve back-moving spring 25 compresses ball valve 29 to the first sealed seat surface 24，The boost fluid force feed flowed in valve body 10 flows into the first sealed seat surface 24 via high pressure fuel feed hole 23、Ball valve 29、In the ring-shaped chamber that push rod 30 and valve body 10 are formed，Due to ball valve 29 in this cavity volume suffered hydraulic coupling less than ball valve back-moving spring 25 spring force upwards，Ball valve 29 is still compacted on the first sealed seat surface 24 by ball valve back-moving spring 25，Now，Second sealed seat surface 28 is opened，High-low pressure through hole 26 connection controls chamber 4 and low pressure spill port 27，Chamber 4 and fuel tank 18 is controlled thereby through oil return pipe 13 connection，Control hydraulic fluid pressure in chamber 4 relatively low，Charged piston 5 charged piston back-moving spring 6 act under not to booster cavity 8 in hydraulic oil carry out supercharging，In booster cavity 8, hydraulic fluid pressure is relatively low，Valve 13 is compacted on valve seating 16 under the spring-force driven dual of valve return springs 12，Blow vent 15 does not connect with cylinder；nullControl booster-type air distribution system piezoelectricity control part 3 at piezoelectricity to receive after the pressurization control electric current of internal-combustion engine electronic control unit，Inverse piezoelectric effect due to piezoelectric pile 22，Piezoelectric pile 22 anamorphic stretching，Push down on push rod 30，Ball valve 29 moves downwardly together with push rod 30，Ball valve 29 leaves the first sealed seat surface 24 and seals the second sealed seat surface 28，High-low pressure through hole 26 and low pressure spill port 27 disconnect，High-low pressure through hole 26 connects with high pressure fuel feed hole 23，Boost fluid force feed in hydraulic oil rail 1 flows through hydraulic oil pipe 2 ramp metering chamber 4，Control pressure in chamber 4 to raise rapidly，Owing to charged piston 5 upper end area is more than lower end area，Charged piston 5 moves downward and hydraulic oil in booster cavity 8 is carried out supercharging，In booster cavity 8, hydraulic fluid pressure increases sharply，Now control hydraulic coupling suffered by piston 9 making a concerted effort more than inner pressure of air cylinder suffered by spring force and the valve 13 of valve return springs 12，Control piston 9 to move downwardly together with valve 13，Valve 13 leaves valve seating 16 and opens，Blow vent 15 connects with cylinder，Open distribution；nullWhen piezoelectricity controls control part 3 power-off again of booster-type air distribution system piezoelectricity，Piezoelectric pile 22 recovers original length again，Ball valve 29 moves upward under the spring-force driven dual of ball valve back-moving spring 25 and is again sealed off the first sealed seat surface 24，High-low pressure through hole 26 and high pressure fuel feed hole 23 disconnect，Second sealed seat surface 28 is opened，Control chamber 4 to be connected with low pressure spill port 27 by high-low pressure through hole 26，High pressure liquid force feed in control chamber 4 flows through high-low pressure through hole 26 and is back to fuel tank 18，Control rapid pressure drop in chamber 4，In the spring force and booster cavity 8 of charged piston back-moving spring 6, charged piston 5 under the hydraulic coupling force action of charged piston 5 lower surface is moved up to initial position by hydraulic oil，Oil sucting one-way valve 7 is opened，Booster cavity 8 is by oil sucting one-way valve 7 oil suction in fuel tank 18，In booster cavity 8, hydraulic fluid pressure recovers to initial value，Valve 13 moves upward under the spring-force driven dual of valve return springs 12 and is compacted to valve seating 16 and closes，Complete a distribution cyclic process.Shown in Fig. 1, schematic diagram during for the present invention for four-cylinder internal combustion engine, it is possible to adjust piezoelectricity of the present invention flexibly according to cylinder of internal-combustion engine number and control the piezoelectricity control part 3 of booster-type air distribution system, control the number of chamber 4, charged piston 5, charged piston back-moving spring 6, oil sucting one-way valve 7, booster cavity 8, control piston 9, valve body 10, spring base 11, valve return springs 12, valve 13, shell 14, blow vent 15 and valve seating 16 etc..The present invention adopts hydraulic oil rail 1 to significantly reduce the valve 13 caused due to the hydraulic oil pressure fluctuation caused when piezoelectricity controls the conversion of part 3 high-low pressure oil circuit and opens and closes unstability, it is ensured that the reliability of air distribution system work and concordance；Control part 3 power on/off by piezoelectricity and directly drive the displacement of ball valve 29, realize the flexible control of the break-make to high-low pressure oil circuit and uninterrupted, by charged piston to the hydraulic oil supercharging in booster cavity, make to act on the hydraulic coupling controlled on piston to change flexibly, hydraulic valve opens and closes, different distribution modes can be realized, both can according to different regulating working conditions valve timings, distribution duration angle can be controlled again flexibly, significantly improve valve 13 control freedom degree, economy and the engine exhaust of fuel can be improved further, be conducive to improving the power performance of internal combustion engine.
Piezoelectricity of the present invention controls booster-type air distribution system and includes hydraulic oil rail, hydraulic oil pipe, piezoelectricity control part, controls chamber, charged piston, charged piston back-moving spring, oil sucting one-way valve, booster cavity, control piston, valve body, spring base, valve return springs, valve, shell, blow vent, valve seating, oil return pipe, fuel tank, filter and hydraulic oil pump.The hydraulic pressure oil-in having on valve body is connected with hydraulic oil rail by hydraulic oil pipe, and the low pressure oil return opening that valve body has connects fuel tank by oil return pipe.Valve body is respectively designed with high pressure fuel feed hole, the first sealed seat surface, high-low pressure through hole, low pressure spill port and the second sealed seat surface.Charged piston upper end area, more than lower end area, is formed between its upper end and valve body and controls chamber, controls chamber connection high-low pressure through hole, forms booster cavity between lower end and control piston and valve body, and booster cavity is connected with fuel tank by oil sucting one-way valve.Controlling piston and be arranged on valve top, spring base is fixed on valve by locating snap ring, and valve return springs is pressed between spring base and shell.
Piezoelectricity control part includes electrical connector, piezoelectric pile, high pressure fuel feed hole, the first sealed seat surface, ball valve back-moving spring, high-low pressure through hole, low pressure spill port, the second sealed seat surface, ball valve and push rod.High pressure fuel feed hole is connected with hydraulic pressure oil-in by the hydraulic oil channel on valve body, low pressure spill port is connected with low pressure oil return opening by the low pressure drainback passage on valve body, when ball valve is compacted on the first sealed seat surface, the connection of high-low pressure through hole controls chamber and low pressure spill port, when ball valve is compacted on the second sealed seat surface, the connection of high-low pressure through hole controls chamber and high pressure fuel feed hole, piezoelectric pile upper end is connected with internal-combustion engine electronic control unit by electrical connector, and ball valve is compacted on push rod by ball valve back-moving spring.Piezoelectricity controls part, controls chamber, charged piston, charged piston back-moving spring, oil sucting one-way valve, booster cavity, control piston, valve body, spring base, valve return springs, valve, shell, blow vent are identical with cylinder of internal-combustion engine quantity with the quantity of valve seating.
Claims (3)
1. piezoelectricity controls booster-type air distribution system, it is characterized in that: include distribution unit, hydraulic oil rail, fuel tank；nullDescribed distribution unit includes valve body、Piezoelectricity controls part、Valve、Shell，Described piezoelectricity control part includes piezoelectric pile、Push rod、Ball valve、Ball valve back-moving spring，Piezoelectric pile is arranged in valve body，Push rod chamber it is respectively provided with in valve body、High pressure fuel feed hole、High-low pressure through hole、Low pressure spill port、Ball valve chamber and ball valve back-moving spring chamber，Push rod is positioned in push rod chamber and is positioned at the lower section of piezoelectric pile，Ball valve is located in ball valve chamber，Ball valve chamber is positioned at below push rod chamber，Ball valve back-moving spring chamber is positioned at below ball valve chamber，Ball valve back-moving spring is arranged in ball valve back-moving spring chamber and is positioned at below ball valve，The position matched with ball valve in ball valve chamber upper end is the first sealed seat surface，The position matched with ball valve in ball valve chamber lower end is the second sealed seat surface，High pressure fuel feed hole is respectively communicated with push rod chamber and hydraulic oil rail，Low pressure spill port is respectively communicated with ball valve back-moving spring chamber and fuel tank，In the valve body of piezoelectricity control beneath portions, control chamber is set，High-low pressure through hole is respectively communicated with ball valve chamber and controls chamber，Control chamber and be arranged below charged piston，Charged piston is cased with charged piston back-moving spring，Charged piston is arranged below booster cavity，Booster cavity is by inlet line connection low pressure spill port，Inlet line is installed oil sucting one-way valve，Booster cavity is arranged below controlling piston，Control piston and connect valve，Valve is cased with valve return springs，Shell is arranged on below valve body，Valve seating is installed in the end of valve，Valve seating is positioned at outer side；The number of described distribution unit is consistent with the number of engine cylinder.
2. piezoelectricity according to claim 1 controls booster-type air distribution system, it is characterized in that: the area of charged piston upper surface is more than the area of its lower surface.
3. piezoelectricity according to claim 1 and 2 controls booster-type air distribution system, it is characterized in that: when piezoelectricity control part is not powered on, piezoelectric pile keeps original length, ball valve back-moving spring compresses ball valve to the first sealed seat surface, boost fluid force feed flows into push rod chamber via high pressure fuel feed hole, second sealed seat surface is opened, and the connection of high-low pressure through hole controls chamber and low pressure spill port, and valve seating is crushed on shell under the effect of valve return springs；After piezoelectricity controls partial current, piezoelectric pile anamorphic stretching, pushing down on push rod, ball valve moves downwardly together with push rod, and ball valve leaves the first sealed seat surface and seals the second sealed seat surface, high-low pressure through hole disconnects with low pressure spill port, high-low pressure through hole connects with high pressure fuel feed hole, the boost fluid force feed stream ramp metering chamber in hydraulic oil rail, and charged piston moves downward, controlling piston to move downwardly together with valve, valve seating leaves shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610289350.3A CN105804827A (en) | 2016-05-04 | 2016-05-04 | Piezoelectrically-controlled pressure-intensified valve system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610289350.3A CN105804827A (en) | 2016-05-04 | 2016-05-04 | Piezoelectrically-controlled pressure-intensified valve system |
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| CN105804827A true CN105804827A (en) | 2016-07-27 |
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| CN201610289350.3A Pending CN105804827A (en) | 2016-05-04 | 2016-05-04 | Piezoelectrically-controlled pressure-intensified valve system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869368A (en) * | 2016-09-27 | 2018-04-03 | 浙江师范大学 | A kind of fluid pressure type of Piezoelectric Driving is without camshaft valve actuating mechanism |
| CN109488409A (en) * | 2018-11-20 | 2019-03-19 | 哈尔滨工程大学 | A kind of two stroke diesel engine variable exhaust valve activator and its control method |
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| CN107869368A (en) * | 2016-09-27 | 2018-04-03 | 浙江师范大学 | A kind of fluid pressure type of Piezoelectric Driving is without camshaft valve actuating mechanism |
| CN109488409A (en) * | 2018-11-20 | 2019-03-19 | 哈尔滨工程大学 | A kind of two stroke diesel engine variable exhaust valve activator and its control method |
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Inventor after: Ding Yu Inventor after: Fan Liyun Inventor after: Bai Yun Inventor after: Song Enzhe Inventor before: Fan Liyun Inventor before: Bai Yun Inventor before: Song Enzhe |
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