CN100519998C - Compressed air engine electrically driven whole-variable valve actuating system - Google Patents
Compressed air engine electrically driven whole-variable valve actuating system Download PDFInfo
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- CN100519998C CN100519998C CNB2007101566280A CN200710156628A CN100519998C CN 100519998 C CN100519998 C CN 100519998C CN B2007101566280 A CNB2007101566280 A CN B2007101566280A CN 200710156628 A CN200710156628 A CN 200710156628A CN 100519998 C CN100519998 C CN 100519998C
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Abstract
The present invention relates to compressed air engine, and is especially one kind of variable air valve driving system for compressed air engine. The system includes one air valve spring, one shaft coupler, one piston rod and one piston inside a cylinder, connected successively to the air valve. There are two communication states between the air passage and the air exhaust electromagnetic directional valve based on the final position of the valve. The valve opening time may be controlled by means of controlling the power-on pulse duration. The present invention has the advantages of capacity of decoupling air valve motion and the crankshaft rotation speed of the pneumatic engine to optimize the air distributing phase, capacity of recovering the vehicle braking energy, convenient braking strength regulation, etc.
Description
Technical field
The present invention relates to a kind of compressed air engine device, more particularly, the present invention relates to a kind of compressed air engine whole-variable valve actuating system.
Background technique
Constantly soar and the fuel-engined vehicle environmental pollution of fuel price constantly increase the weight of to make countries in the world all stepping up to research and develop new-energy automobile.Air motor, does not need to consume petroleum as working medium with pressurized air and liquid nitrogen in the course of the work, can realize zero-emission, is a kind of developing direction.Compressed air engine major impetus source is from the pressurized air that enters cylinder, and its payload mainly is to realize by the amount that adjusting enters the air of cylinder.Adopt the method for regulating suction pressure and period of intake can finish the control of air inflow.But what regulate the suction pressure employing is the throttling control mode, can cause more pressurized gas can use loss of energy than regulating period of intake.The intake and exhaust phase place of rationally controlling air motor in addition also helps improving the working efficiency of air motor.The air motor rotary valve induction device that conventional camshaft-actuated valve system and China Patent No. [02160723.0] are proposed all can only be controlled the load that suction pressure is regulated motor by throttle style.In order to improve the efficient of air motor, realize that air motor reclaims the mode of operation of vehicle braking energy, must a kind of air motor whole-variable valve actuating system of development.
The variable valve actuation mode of motor comprises cam drive, Electromagnetic Drive, the driving of electric liquid, electric driving etc. at present.The cam drive mode still relies on the conventional cam system and finishes valve actuation work, and it only provides some additional controls to lift and timing, does not accomplish distribution device full decoupled with respect to engine speed fully, regulates very dumb.Because the air motor suction pressure is very high, the electromagnetism direct drive mode is difficult to satisfy simultaneously the requirement that valve opens and closes frequency and lift.Electricity liquid driving mode adopts electromagnetic servo valve hydraulic piston mode to drive valve, is a kind of comparatively desirable variable valve actuation mode.But electric liquid variable valve system exist changed comparatively obviously by Temperature Influence and the inertial force of liquid greatly and the big shortcoming of consuming energy.The working principle of electric driving mode and electric liquid driving mode is roughly the same, just changed working medium into pressurized air, drive than electric liquid, the pressurized air corresponding speed is faster than liquid soon, the viscosity of light weight and air is subjected to Temperature Influence less, but, cause its power consumption higher because the efficient of compressed air system will be lower than hydraulic system.U.S. Patent number [473948] has proposed a kind of electric valve actuation mode, and what this drive unit adopted is reciprocal slide-valve structure, and complex structure requires the machining accuracy height.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of novel compressed air engine whole-variable valve actuating system is provided.
This system comprises high pressure tank, pressure stabilizer and is positioned at valve on the cylinder that pressure stabilizer is connected with cylinder by intake manifold, also comprises the valve spring, coupling, piston rod and the piston that are connected successively with valve; Piston is positioned at control cylinder, the inner chamber of control cylinder is divided into goes up active chamber and following active chamber, and last active chamber is connected with solenoid directional control valve with following active chamber gas channel by last active chamber gas channel respectively with following active chamber; Also set up the high pressure admission mouth on the solenoid directional control valve, go up low pressure exhaust mouth and following low pressure exhaust mouth; Last low pressure exhaust mouth is connected with pressure stabilizer by pipeline with following low pressure exhaust mouth; At least one decompression gas tank is set between high pressure tank and the pressure stabilizer, and high pressure tank or decompression gas tank are connected with the high pressure admission mouth by pipeline.
As a kind of improvement, establish reduction valve respectively between described high pressure tank, decompression gas tank and the pressure stabilizer.
As a kind of improvement, action final position difference based on solenoid directional control valve, have two kinds of connected states between the gas channel that is connected to solenoid directional control valve and the relief opening: a kind of connected state is to go up the active chamber gas channel to link to each other with last low pressure exhaust mouth, and same active chamber gas channel at present is connected with the high pressure admission mouth; Another kind of connected state is to go up the active chamber gas channel to be connected with the high pressure admission mouth, and the active chamber gas channel links to each other with following low pressure exhaust mouth at present together.
Compared with prior art, of the present invention have a following advantage:
(1) realized the decoupling zero of air motor valve motion and speed of crankshaft, can realize that the time of air motor air inflow is regulated, reduced the restriction loss of air inlet according to the port timing of the regulating working conditions optimum of air motor;
(2) Pneumatic automobile that uses this technology just can realize that the mode of operation of gas compressor is carried out the vehicle braked energy recovery, and severity of braking can be regulated very easily in callback course as long as rationally control the open phase of valve;
(3) the present invention adopts the energy of wasting in the decompression process to drive valve, has realized the recycling of decompression energy, and it is very little to consume energy;
(4) the present invention is simple in structure, and it is convenient to realize.Valve group parts can be continued to use the mature technology processing of existing internal-combustion engine, and solenoid directional control valve, control cylinder etc. has had very ripe product.
Description of drawings
Fig. 1 is the schematic diagram of electrical control whole-variable valve actuating system in the embodiment of the invention.
Wherein reference character is: high pressure tank 1, reduction valve 2, one-level decompression gas tank 3, pressure stabilizer 4, down low pressure exhaust mouth 5, high pressure admission mouth 6, go up low pressure exhaust mouth 7, solenoid directional control valve 8, control cylinder 9, go up active chamber 10, piston 11, piston rod 12, down active chamber 13, coupling 14, valve spring 15, intake manifold 16, valve 17, cylinder 18, go up active chamber gas channel 19, active chamber gas channel 20 down.
Embodiment
Describe the present invention below in conjunction with accompanying drawing.
Compressed air engine electrically driven whole-variable valve actuating system as shown in Figure 1 in the present embodiment, comprise high pressure tank 1, pressure stabilizer 4 (second depressurized gas tank) and be positioned at valve 17 on the cylinder 18, pressure stabilizer 4 is connected with cylinder 18 by intake manifold 16, what be connected successively with valve 17 is valve spring 15, coupling 14, piston rod 12 and piston 11, so the keying campaign of valve 17 is that to-and-fro motion by piston 11 realizes.
Piston 11 is positioned at control cylinder 9, the inner chamber of control cylinder 9 is divided into goes up active chamber 10 and following active chamber 13, and last active chamber 10 is connected with solenoid directional control valve 8 with following active chamber gas channel 20 by last active chamber gas channel 19 respectively with following active chamber 13; also set up on the solenoid directional control valve 8 high pressure admission mouth 6, on low pressure exhaust mouth 7 and following low pressure exhaust mouth 5; Last low pressure exhaust mouth 7 is connected with pressure stabilizer 4 by pipeline with following low pressure exhaust mouth 5; Set up one-level decompression gas tank 3 between high pressure tank 1 and the pressure stabilizer 4, respectively establish a reduction valve 2 between high pressure tank, one-level decompression gas tank and the pressure stabilizer; One-level decompression gas tank 3 is connected with high pressure admission mouth 6 by pipeline.High pressure tank 1 is total gas holder, and the pressure of its internal compression air quite high (can be 20MPa or higher) for the stifled phenomenon of anti-stagnant ice, must be illustrated as two-stage decompression through could using by the moving motor of air feed after what decompression.One-level decompression gas tank 3 stores through reduction valve 2 post-decompression air, and the pressurized air in the one-level decompression gas tank 3 is through entering pressure stabilizer 4 (second depressurized gas tank) after the decompression once more, and pressure stabilizer 4 directly is connected with inlet manifold 16.
Solenoid directional control valve 8 plays guide's commutation effect of control cylinder 9 according to the electrical signal action.Action final position difference based on solenoid directional control valve, have two kinds of connected states between the gas channel that is connected to solenoid directional control valve 8 and the relief opening: a kind of connected state is to go up active chamber gas channel 19 to link to each other with last low pressure exhaust mouth 7, and same active chamber gas channel 20 at present is connected with high pressure admission mouth 6; Another kind of connected state is to go up active chamber gas channel 19 to be connected with high pressure admission mouth 6, and active chamber gas channel 20 links to each other with following low pressure exhaust mouth 5 at present together.
Position shown in Figure 1 is the valve-closing position.At this moment, pressurized gas in the one-level decompression gas tank 3 enter the active chamber of solenoid directional control valve 8 through high pressure admission mouth 6, and then enter down active chamber 13, last active chamber 10 is communicated with pressure stabilizer 4 by last low pressure exhaust mouth 7, because the gas pressure in the one-level decompression gas tank 3 is greater than the gas pressure in the pressure stabilizer 4, the last active chamber 10 of piston 11 and the high low pressure gas load of following active chamber 13 overcome suffered other power (thrust gas that comprises the valve front and back that valve is suffered of valve 17, the active force of valve spring 15 and frictional force everywhere) effect, move to the top of control cylinder 9 and drive valve 17 and be close on the valve seat.When solenoid directional control valve 8 energisings, its spool is realized moving in the little displacement fast, last active chamber 10 is communicated with high pressure admission mouth 6, following active chamber 13 communicates with following low pressure exhaust mouth 5, this moment, piston 11 was at last active chamber 10, down under the low pressurized gas active force of active chamber 13, overcame other suffered active forces of valve 17, and promotion valve 17 is opened fast, by the electrical pulse length of control solenoid directional control valve 8, just can control valve 17 and open the endurance.
At last, it is also to be noted that what more than announce only is specific embodiments of the invention.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (2)
1, a kind of compressed air engine electrically driven whole-variable valve actuating system, comprise high pressure tank, pressure stabilizer and be positioned at valve on the cylinder, pressure stabilizer is connected with cylinder by intake manifold, it is characterized in that, also comprise the valve spring, coupling, piston rod and the piston that are connected successively with valve; Piston is positioned at control cylinder, the inner chamber of control cylinder is divided into goes up active chamber and following active chamber, and last active chamber is connected with solenoid directional control valve with following active chamber gas channel by last active chamber gas channel respectively with following active chamber; Also set up the high pressure admission mouth on the solenoid directional control valve, go up low pressure exhaust mouth and following low pressure exhaust mouth; Last low pressure exhaust mouth is connected with pressure stabilizer by pipeline with following low pressure exhaust mouth; Action final position difference based on solenoid directional control valve, have two kinds of connected states between the gas channel that is connected to solenoid directional control valve and the relief opening: a kind of connected state is to go up the active chamber gas channel to link to each other with last low pressure exhaust mouth, and same active chamber gas channel at present is connected with the high pressure admission mouth; Another kind of connected state is to go up the active chamber gas channel to be connected with the high pressure admission mouth, and the active chamber gas channel links to each other with following low pressure exhaust mouth at present together; At least one decompression gas tank is set between high pressure tank and the pressure stabilizer, and high pressure tank or decompression gas tank are connected with the high pressure admission mouth by pipeline.
2, compressed air engine electrically driven whole-variable valve actuating system according to claim 1 is characterized in that, establishes reduction valve respectively between described high pressure tank, decompression gas tank and the pressure stabilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101566280A CN100519998C (en) | 2007-11-02 | 2007-11-02 | Compressed air engine electrically driven whole-variable valve actuating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101566280A CN100519998C (en) | 2007-11-02 | 2007-11-02 | Compressed air engine electrically driven whole-variable valve actuating system |
Publications (2)
| Publication Number | Publication Date |
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| CN101149002A CN101149002A (en) | 2008-03-26 |
| CN100519998C true CN100519998C (en) | 2009-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101566280A Expired - Fee Related CN100519998C (en) | 2007-11-02 | 2007-11-02 | Compressed air engine electrically driven whole-variable valve actuating system |
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| KR20140031319A (en) | 2011-05-17 | 2014-03-12 | 서스테인쓰, 인크. | Systems and methods for efficient two-phase heat transfer in compressed-air energy storage systems |
| US20130091835A1 (en) | 2011-10-14 | 2013-04-18 | Sustainx, Inc. | Dead-volume management in compressed-gas energy storage and recovery systems |
| CN103498702B (en) * | 2012-09-17 | 2016-08-17 | 摩尔动力(北京)技术股份有限公司 | Air motor |
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2007
- 2007-11-02 CN CNB2007101566280A patent/CN100519998C/en not_active Expired - Fee Related
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| CN101149002A (en) | 2008-03-26 |
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Granted publication date: 20090729 Termination date: 20111102 |