CN1598252A - Distribution mechanism for internal-combution engine of camless electrohydraulic drived - Google Patents
Distribution mechanism for internal-combution engine of camless electrohydraulic drived Download PDFInfo
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- CN1598252A CN1598252A CN 200410020388 CN200410020388A CN1598252A CN 1598252 A CN1598252 A CN 1598252A CN 200410020388 CN200410020388 CN 200410020388 CN 200410020388 A CN200410020388 A CN 200410020388A CN 1598252 A CN1598252 A CN 1598252A
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Abstract
The invention relates to a gas distribution mechanism for gas engine driven by electrohydraulic without convex wheel, it lies in that it is connected to the hydraulic piston through the top screw and is inserted into the hydraulic cavity through gas pipe. The hydraulic piston divides the hydraulic cylinder into hydraulic cavity and control chamber, the hydraulic cavity is connected to the high pressure liquid inlet, the control chamber is connected to the pressure control aperture. There has high pressure source and low pressure source at the high pressure liquid inlet and the pressure control aperture, the connection of the high pressure source and the low pressure source use high and low piezoelectric magnetic valve to be controlled. The system has no spring; the air door can accelerate or decelerate constantly.
Description
Technical field
The present invention is specifically related to a kind of intake and exhaust parameter of optimizing quartastroke engine, improves the technology of engine performance.
Technical background
At present, piston type four-stroke internal combustion engine all adopts the distribution device of mechanical type camshaft actuated inlet door and exhaust valve.The mechanical transmission that moves through between bent axle and camshaft and camshaft and each the cylinder valve of valve is controlled regularly.For a long time, this mechanical type mechanism is proved to be simply, effectively and reliably, and expense is cheap relatively.Yet this valve mechanism is in the unlatching moment of valve, and opening endurance and valve lift etc. is changeless on parameter, and work lacks flexible.Along with the fuel economy of internal-combustion engine and the requirement of reduction noxious emission are improved constantly, force vast internal combustion (IC) Engine Design personnel to seek new-type distribution device.
At initial stage nineties phase late 1980s, numerous researchers have developed a series of variable ventilation schemes based on camshaft, and as the Toyota Company of Japan, the VTEC system of Honda, the FEV of Germany etc. has all carried out this type of work.These schemes generally are by increasing annex, the phase place of camshaft is changed or use many cammings, thereby can effectively improve the operating conditions of motor part operating mode, optimized the performance of motor, but this can only be the various working conditions of comprehensive motor, improves the operation of certain a part of operating mode selectively, can not realize that all operating modes all reach the control of complete the best, thereby the just improvement of a part.The middle and later periods eighties 20th century, the researcher begins to have initiated the research with the no cam valve mechanism that can regulate the valve Operational Limits continuously of microprocessor control.No cam valve train is exactly camshaft and the driven member of cancellation in the engine valve actuating mechanism, and drives valve with electromagnetism, electric liquid, electric or other modes.The Gabriel of Germany. base of a fruit base of a fruit Sa was applied for the patent of invention (CN 88 1 00461 A) of " hydraulic transmission and the variable characteristic valve actuator of controlling by sliding sleeve " in 1988 in China, its basic thought is that valve is controlled by hydraulic piston, and flowing of the hydraulic working fluid that oil pump provides controlled by a rotary valve, and the lift of valve realizes by the sliding sleeve of axial adjustment auxiliary axis on the rotary valve and configuration with it.The Guo Laishun of China in 1999 etc. has applied for " internal-combustion engine inlet and outlet valve does not have the cam start-stop device " utility model patent (ZL 99202687.3), it is by the driving wheel that outstanding conductor is housed that rotates, fixing and is made up of the air valve that is tied with the electric wire winding on the distributing disk of the arc-shaped conductor of setting by port timing and the valve rod, and its basic thought of opening, closing the inlet and outlet door mainly is the active force of offsetting valve spring by the energising of the electric wire winding on air valve valve rod back generation electromagnetic force.American Australia moral E. Stedman in 2000 discloses the patent of invention (CN 1251638A) of " internal-combustion engine hydraulic control no cam valve system " in China, control the controller of different parts (for example oil sprayer, exhaust valve, pump bypass valve) with digital controlled signal.Exhaust flow for air stream that enters the firing chamber and discharge firing chamber can be by no cam hydraulic driving intake valve and exhaust valve control.Hydraulic driving is by the control of Electromagnetic Control locking hydraulic control valve.The patent of invention of Gabriel. Di Disa (CN 88 1 00461 A), the mode of its control is to realize by the sliding sleeve of axial adjustment auxiliary axis on the rotary valve and configuration with it, for internal-combustion engine mechanism at a high speed, obvious mechanical control mode has inborn deficiency on the response time.The utility model patent of Guo Laishun (ZL 99202687.3) adopts electromagnetic force to control the motion of valve, and electromagnetic force often is index and descends along with the increase of frequency, and under the situation of valve high-speed motion and high temperature, the power of control valve motion can be not enough to some extent.Patent of invention (CN 1251638A) mechanism's more complicated of Australia moral E. Stedman, the cost of realization is higher.And these three kinds of patents all are the lifts that adopts hydraulic coupling or electromagnetic force to open valve, but valve take a seat remain by valve spring power be used for close.Therefore, just can control preceding half track to the motion of valve, the impact force during air valve drop is big, easily causes the damage of valve and valve seat, and causes bigger noise.
Summary of the invention
The objective of the invention is for can be according to the practical working situation of internal-combustion engine, lift and port timing to its inlet and exhaust valve are controlled, a kind of distribution device that cam electricity liquid drives that do not have is provided, can reaches and optimize the intake and exhaust parameter, improve combustion process, reduce noxious emission, improve the purpose of Economy.
The distribution device modular construction that no cam electricity liquid drives is shown in Fig. 1～2.Mainly have valve 1, valve pedestal 3.Valve 1 is connected with hydraulic piston 5 by the screw thread at its top, and the part that the lower end of valve pedestal 3 has taper is referred to as valve guide bushing, and valve 1 inserts hydraulic pressure cavity 4 by the valve guide bushing in the valve pedestal 3.The port of valve guide bushing is equipped with seal ring 2 on valve pedestal 3, prevents the hydraulic oil seepage.Hydraulic piston 5 is separated into hydraulic pressure cavity 4 and control room 9 with hydraulic-pressure sleeve, and hydraulic pressure cavity 4 communicates with highly pressurised liquid inlet opening 8, and control room 9 communicates with pressure control mouth 6.Capping 7 seals whole hydraulic chamber, the sealed mouth that plug 10 stays for processing technology.In highly pressurised liquid inlet opening 8 and pressure control mouth 6 places be connected to high-voltage power supply 11 and low pressure source 12 respectively.High-voltage power supply is controlled with adopting high-pressure solenoid valve 13 being connected of low pressure source, and the liquid of low pressure source inputs or outputs by low-voltage solenoid valve 14 controls.Hydraulic piston 5 lower ends are that the internal thread upper end is interior hexagonal, hydraulic piston are tightened in the top of valve 1 by inner hexagon spanner.Hydraulic piston 5 all can slide in hydraulic pressure cavity 4 with valve 1.
Fig. 3 is that electric liquid drives desirable acceleration-time, Velocity-time, the valve lift-time graph of distribution device.
In order to make the constant driving minimum of electric liquid driving mechanism, the acceleration and deceleration of opening and closing must be identical.Just can change engine valve by the work timing that changes high-pressure solenoid valve and low-voltage solenoid valve opens and closes regularly.Certainly, this has also changed the endurance of valve opening.Just can control the lift of valve by the endurance that changes the solenoid valve pulse.And the acceleration of valve, speed and run duration can be controlled by the pressure that changes high-pressure liquid.During engine operation, be under the above-mentioned described state, valve is quit work by high-pressure solenoid valve and the low-voltage solenoid valve that makes valve.The endurance that stops can be any a plurality of circulations, also can only be a circulation.Do not need to increase the corresponding solenoid valve number when needs increase when every cylinder valve is counted, a pair of solenoid valve both can be controlled a pair of valve, also can control the many to valve of parallel running.Therefore, can be with two intake valves of a pair of electromagnetic valve synchronous operation in four-valve engine, with another to two exhaust valves of electromagnetic valve.
Description of drawings
The distribution device assembly assumption diagram that Fig. 1 drives for no cam electricity liquid.
Fig. 2 is control principle figure of the present invention.
Fig. 3 is desirable (acceleration-time, Velocity-time, the valve lift-time) movement profiles of the present invention.
Fig. 4 is the assembling layout plan of the present invention on cylinder.
Fig. 5 adopts connection diagram of the present invention for 156FMI motorcycle engine cylinder cap.(similar) with Fig. 4
Fig. 6 is for having cam-actuated common engine valve lift curve.
Fig. 7 is the valve lift curve result of embodiment of the invention test.
Wherein: the 1-valve; The 2-seal ring; 3-valve pedestal; The 4-hydraulic pressure cavity; The 5-hydraulic piston; 6-pressure control mouth; The 7-capping; 8-highly pressurised liquid inlet opening; The 9-control room; The 10-plug; The 11-high-voltage power supply; The 12-low pressure source; 13, high-pressure solenoid valve; 14, low-voltage solenoid valve; 15, cylinder head
Embodiment
Below the present invention is described further by concrete working procedure.
With reference to the accompanying drawings 1～5, when valve 1 was opened, high-pressure solenoid valve 13 was opened, and low-voltage solenoid valve 14 is closed.High-pressure liquid flows into control room 9 through pressure control mouth 6 and acts on the hydraulic piston 5.Because the pressure of hydraulic piston 5 upper and lower end liquid is identical, but the effective active area of hydraulic piston 5 upper-end surface liquid just has a downward active force greater than the lower end surface to hydraulic piston, quicken to move downward thereby make hydraulic piston 5 promote valve 1.When valve motion arrived near maximum lift, high-pressure solenoid valve 13 was closed, and hydraulic fluid stops to enter control room 9.Along with moving down of hydraulic piston 5, it is big that the volume in control room 9 becomes, and 9 fluid total volume remains unchanged in the control room, pressure in the control room is descended, and the pressure in the hydraulic piston 5 lower end hydraulic pressure cavity remains unchanged, what at this moment hydraulic piston was subjected to making progress makes a concerted effort, but because inertia, valve 1 will be done retarded motion downwards.When valve stopped to move downward, high-pressure solenoid valve 13, low-voltage solenoid valve 14 were all closed, and valve rests on the position of maximum lift.The valve-closing process is opened similar to valve.Low-voltage solenoid valve 14 is opened, and high-pressure solenoid valve 13 is closed.End pressure is reduced to low pressure source pressure and equates on the hydraulic piston 5, and the net pressure that acts on the hydraulic piston 5 makes valve quicken to move upward.When near seated position, end pressure increases on the hydraulic piston, and valve slows moves upward.
Originally motor promptly as shown in Figure 6 by cam-actuated valve lift curve, this lifting curve is all fixed under any rotating speed.Figure 7 shows that the result of present embodiment test.Comparison diagram 6 and Fig. 7 can find that the Richness of valve lift is greatly improved, and show that air inflow can greatly increase, and exhaust then can be more thorough.
Effect intentionally of the present invention is that it is no spring system that electric liquid drives distribution device, because no spring, valve can quicken or retarded motion consistently, and this makes can take little a lot of clean drive force valve motion than the system that spring is arranged.Advantageously, having only valve in no spring system is mechanical moving element, reduced motion number of components and parts and quality, except that can cut down the consumption of energy and noise, also can reach and optimize the intake and exhaust parameter, improve combustion process, reduce noxious emission, improve the purpose of Economy.
Claims (3)
1. there is not cam electricity liquid internal combustion engine driven distribution device, mainly has valve (1), valve pedestal (3), it is characterized in that valve (1) is connected with hydraulic piston (5) by the screw thread at its top, insert hydraulic pressure cavity (4) by the valve guide bushing in the valve pedestal (3), port at valve pedestal (3) valve guide bushing is equipped with seal ring (2), hydraulic piston (5) is separated into hydraulic pressure cavity (4) and control room (9) with hydraulic-pressure sleeve, hydraulic pressure cavity (4) communicates with highly pressurised liquid inlet opening (8), control room (9) communicates with pressure control mouth (6), capping (7) seals whole hydraulic chamber, and plug (10) is the sealed mouth of processing technology.
2. according to the described no cam electricity liquid internal combustion engine driven distribution device of claim 1, it is characterized in that locating to be connected to respectively high-voltage power supply (11) and low pressure source (12) in highly pressurised liquid inlet opening (8) and pressure control mouth (6), high-voltage power supply adopts high-pressure solenoid valve (13) control with being connected of low pressure source, and the liquid of low pressure source inputs or outputs by low-voltage solenoid valve (14) and controls.
3. according to claim 1 or 2 described no cam electricity liquid internal combustion engine driven distribution devices, it is characterized in that described hydraulic piston (5) lower end is that the internal thread upper end is interior hexagonal, hydraulic piston (5) all can slide in hydraulic pressure cavity (4) with valve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410020388 CN1598252A (en) | 2004-08-31 | 2004-08-31 | Distribution mechanism for internal-combution engine of camless electrohydraulic drived |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410020388 CN1598252A (en) | 2004-08-31 | 2004-08-31 | Distribution mechanism for internal-combution engine of camless electrohydraulic drived |
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| Publication Number | Publication Date |
|---|---|
| CN1598252A true CN1598252A (en) | 2005-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410020388 Pending CN1598252A (en) | 2004-08-31 | 2004-08-31 | Distribution mechanism for internal-combution engine of camless electrohydraulic drived |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975098A (en) * | 2010-09-30 | 2011-02-16 | 哈尔滨工程大学 | Camless electrohydraulic variable valve timing system based on fuel medium |
| CN103266927A (en) * | 2013-05-07 | 2013-08-28 | 天津大学 | Rocker system of hydraulic stepless variable valve |
| CN106958470A (en) * | 2017-05-23 | 2017-07-18 | 海南大学 | Electromagnetic hydraulic pressure valve actuating mechanism |
-
2004
- 2004-08-31 CN CN 200410020388 patent/CN1598252A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975098A (en) * | 2010-09-30 | 2011-02-16 | 哈尔滨工程大学 | Camless electrohydraulic variable valve timing system based on fuel medium |
| CN101975098B (en) * | 2010-09-30 | 2012-12-19 | 哈尔滨工程大学 | Camless electrohydraulic variable valve timing system based on fuel medium |
| CN103266927A (en) * | 2013-05-07 | 2013-08-28 | 天津大学 | Rocker system of hydraulic stepless variable valve |
| CN103266927B (en) * | 2013-05-07 | 2014-11-26 | 天津大学 | Rocker system of hydraulic stepless variable valve |
| CN106958470A (en) * | 2017-05-23 | 2017-07-18 | 海南大学 | Electromagnetic hydraulic pressure valve actuating mechanism |
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