CN101713308B - Hydraulic valve mechanism of variable valve lift - Google Patents
Hydraulic valve mechanism of variable valve lift Download PDFInfo
- Publication number
- CN101713308B CN101713308B CN200910190522.1A CN200910190522A CN101713308B CN 101713308 B CN101713308 B CN 101713308B CN 200910190522 A CN200910190522 A CN 200910190522A CN 101713308 B CN101713308 B CN 101713308B
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- Prior art keywords
- valve
- spool
- sleeve
- oil duct
- hydraulic
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- 230000007246 mechanism Effects 0.000 title abstract description 23
- 210000004907 gland Anatomy 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims description 10
- 230000003044 adaptive effect Effects 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 7
- 230000004044 response Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 40
- 230000008859 change Effects 0.000 description 8
- 239000010720 hydraulic oil Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
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Abstract
The invention discloses a hydraulic valve mechanism of a variable valve lift. The hydraulic valve mechanism of the variable valve lift comprises a valve spool of a puller cam, a sleeve capable of rotating relative to the valve spool and a seal gland connected with a valve. The top end of the sleeve is adapted to the valve spool; the bottom of the sleeve is adapted to the seal gland and an oil chamber is formed in the middle part of the sleeve. The hydraulic valve mechanism of the variable valve lift is characterized in that a valve spool oil duct is formed in the valve spool; an inlet of the valve spool oil duct is movably adapted to a sleeve oil duct; the outlet of the valve spool oil duct is communicated with the oil chamber; and the inlet of the valve spool oil duct is in shape of a helical notch. Part of gears are arranged outside the sleeve so as to drive the sleeve to rotate by racks or other similar mechanisms. A return spring is further arranged on the valve spool. The problems of complicated structure, high cost and low reliability existing in prior art are solved. The hydraulic valve mechanism of the variable valve lift is a hydraulic valve mechanism which is capable of realizing quick response.
Description
Technical field
The present invention relates to a kind of engine variable-valve actuator, especially relate to a kind of hydraulic valve mechanism of lift range variable.
Background technique
At present, because the existence of petrol engine closure, so that motor exists larger pumping loss, when sub load, this loss will affect the performance index of motor to a great extent especially.Therefore, many cancellation closures occur and controlled the method for petrol engine load, Fully variable valve train can real time altering valve lift and timing, under middle-low load, directly control valve lift and change air inflow, namely reach the effect of fuel-economizing, also improved motor low problem of moment of torsion output when low speed, low lift reduces friction of cam shaft power simultaneously, further strengthens engine power performance, can make motor be issued to optimum effect at low-load.At present had many automobile vendors that this technology is carried out R﹠D work in the world wide, wherein more famous is the Valvetronic etc. of Bayerische Motorne Werke Aktiengeellschaft's research and development.
Chinese patent application numbers 200710154322.1 discloses a kind of variable valve actuation of internal-combustion engine, comprising: live axle, and the rotary manipulation of this live axle and bent axle rotates explicitly, to drive into valve by rocking arm or exhaust valve opens or closes; And Control Shaft, this Control Shaft is by driving the Control Shaft driver and rotate and the position of described rocking arm is changed, thereby so that the lift characteristics of described intake valve or exhaust valve can continuously change.Described Control Shaft comprises lip part, and this lip part is outstanding from the outer circumferential face of described Control Shaft, in order to regulate the axial motion of described Control Shaft.The cylinder head that rotatably supports described Control Shaft comprises the flange bearing section that contacts with described lip part.Lip part comprises retention tab, and this retention tab is outstanding and contact flange bearing section from described lip part, thereby regulates the rotating range of Control Shaft.
Chinese patent application numbers 200580042807.0 discloses a kind of system and method be used to activating one or more engine valves.Specifically, thus provide and be used for providing variable valve actuation to improve the system and method for engine performance.Embodiments of the invention can be combined with positive work, internal-combustion engine braking and/or the EGR operation of internal-combustion engine.In one embodiment, described system comprises: valve train element; Housing is arranged between described valve train element and the engine valve; Outer piston is slidably disposed in the hole that is formed in the described housing, and outer piston has the chamber that is formed on wherein; Inner carrier is slidably disposed in the chamber of outer piston; And valve, being communicated with the chamber of outer piston, described valve has the position more than, wherein, the timing of the location positioning engine valve event of described valve.
Chinese patent 200380110202.1 discloses a kind of variable valve train apparatus of internal-combustion engine, its controlling method and hydraulic unit driver, this hydraulic unit driver has hydraulic piston and hydro cylinder and hydraulic power, the control room side of described hydraulic piston is larger than the compression area for grease chamber's side of described hydro cylinder, wherein, described hydraulic piston has groove at its peripheral part, this groove is communicated with for the relative control room of side, grease chamber side vertically from described, and the axial displacement according to hydraulic piston changes described axial channel section area, in addition, described control room has hydraulic pressure Open control valve, by coupling and air valve spring, undertaken to the switching of the air valve of the suction valve of internal combustion office air inlet or the outlet valve of discharge combustion gas etc. by described hydraulic unit driver, and switching that can the described air valve of variable control constantly, opening/closing time, thus, consumption of power reduces, speed of response improves, and can control swimmingly seating velocity.
Chinese patent application numbers 200680051459.8 disclose a kind of for realizing engine valve hydraulic pressure and/or the system and method for variable valve actuation.Embodiments of the present invention comprise the hydraulic valve actuation system that operationally links to each other with engine valve.The first and second control valves operationally link to each other with hydraulic valve actuation system and are suitable for independently of each other selectivity release hydraulic fluid from hydraulic valve actuation system.The first control valve is solenoid-actuated triggering valve preferably, and the second control valve preferably machinery or hydraulic actuated valve.
All there are the problems such as complex structure, cost is high, reliability is low in above-mentioned disclosed variable valve actuation mechanism.
Summary of the invention
The hydraulic valve mechanism that the purpose of this invention is to provide a kind of lift range variable, the problem such as solve the existing complex structure of prior art, cost is high, reliability is low.Realize the fast hydraulic valve mechanism of response.
The technical solution adopted for the present invention to solve the technical problems is: a kind of hydraulic valve mechanism of lift range variable, comprise the spool that holds out against cam, relatively Spool rotating sleeve and connect the stuffing box gland of valve, the adaptive spool in described sleeve top, the adaptive stuffing box gland in bottom, the sleeve middle part forms oil pocket; It is characterized in that: the spool oil duct is set in described spool, and the import of described spool oil duct and the activity of sleeve oil duct are adaptive, and the outlet of spool oil duct is communicated with oil pocket; The import of described spool oil duct is spiral notch.
In order to make reliably relative Spool rotating of sleeve, described sleeve arranges operative gear outward.So that by tooth bar or the rotation of other similar means drive spool.
In order to make the spool return that in time rises, return spring is set also on the described spool.
Beneficial effect of the present invention: owing to being processed with spiral notch on the spool in this mechanism, by the angle of change with turnbarrel, can changing hydraulic oil and inject the interior moment of oil pocket.When the basic circle position of cam, spool is not communicated with the oil duct of turnbarrel, and this moment, cam made the spool downward movement along with the rotation of camshaft, when spool with after the oil duct of turnbarrel is communicated with, by the effect of outside oil pressure, hydraulic oil is pressed in the oil pocket.Spool continues descending under the effect of cam, this moment, the oil circuit of spool and turnbarrel was cut off again, and oil pocket forms fully and seals, in case that spool continues under the effect of cam again is descending, hydraulic oil in the oil pocket can't compress at this moment, and then promotes valve opening by stuffing box gland.
Therefore, change the angle of spool and turnbarrel, also just changed the moment that hydraulic oil injects oil pocket, thereby changed oil reserve in the oil pocket, changed the distance between spool and the stuffing box gland, reach the purpose that changes valve lift.The response process maximum duration is 300 ° of crank angles (crank angle is the standard of measured engine time) fast, can avoid the malcombustions such as generation is caught fire, tempering.
Characteristics of the present invention are summarized as follows:
1. realize that valve timing and lift are fully variable, engine performance significantly improves;
2. discharging, oil consumption are starkly lower than the motor with discharge capacity;
3. simple in structure, compact, reasonable in design, the motor overall volume is without obvious change;
4. the cancellation closure is avoided the motor pumping loss;
5. strengthened the moment of torsion output of motor when low speed.
Below with reference to drawings and Examples, the present invention is described in detail.
Description of drawings
Fig. 1 is the hydraulic valve mechanism sectional view of lift range variable.
Fig. 2 is spool schematic diagram in the hydraulic valve mechanism of lift range variable.
Fig. 3 is the variable air valve lift range mechanism schematic diagram.
Among the figure: 1. return spring, 2. cam, 3. spool, 4. sleeve, 5. valve, 6. gear, 7. spool import, 8. stuffing box gland, 9. oil pocket, 10. spool oil duct, 11. sleeve oil ducts.
Embodiment
Embodiment 1, as shown in Figure 1, 2, 3, a kind of hydraulic valve mechanism of lift range variable, comprise the spool 3 that holds out against cam 2, relatively Spool rotating sleeve 4 and connect the stuffing box gland 8 of valve, the adaptive spool 3 in described sleeve 4 tops, the adaptive stuffing box gland 8 in bottom, the sleeve middle part forms oil pocket 9.In described spool 3 spool oil duct 10 is set, described spool oil duct 10 imports and sleeve oil duct 11 are movable adaptive, and 10 outlets of spool oil duct are communicated with oil pocket 9; Described spool oil duct import 7 is spiral notch.
In order to make reliably relative Spool rotating of sleeve, the described sleeve 4 outer operative gears 6 that arrange.So that by tooth bar or the rotation of other similar means drive spool.
In order to make spool 3 timely rising returns, return spring 1 is set also on the described spool.
This mechanism is fully variable valve actuator for air, the valve maximum lift can be in the scope of 0-9mm continuous variable, its main implementation procedure is as follows:
Owing to being processed with spiral notch on the spool in the mechanism, by the angle of change with turnbarrel, can change hydraulic oil and inject the interior moment of oil pocket, when the basic circle position of cam, valve is not communicated with the oil duct of turnbarrel, and this moment is along with the rotation of camshaft, make the spool downward movement, when spool with after the oil duct of turnbarrel is communicated with, by the effect of outside oil pressure, hydraulic oil is pressed in the oil pocket.Spool continues descending under the effect of cam, this moment, the oil circuit of valve and turnbarrel was cut off again, and oil pocket forms fully and seals, in case that valve continues under the effect of cam again is descending, hydraulic oil in the oil pocket can't compress at this moment, and then promotes valve opening by stuffing box gland.
Therefore, change the angle of spool and turnbarrel, also just changed the moment that hydraulic oil injects oil pocket, thereby changed oil reserve in the oil pocket, changed the distance between valve and the stuffing box gland, reach the purpose that changes valve lift.
This mechanism needs 300 ° of crank angles from high lift to low lift, so this mechanism can finish switching in a work cycle, and response is to start function to keep the essential condition of normal operation fast, also is the another characteristics of this mechanism.
Claims (3)
1. the hydrovalve of a lift range variable, comprise the spool that holds out against cam, relatively Spool rotating sleeve and connect the stuffing box gland of valve, the adaptive spool in described sleeve top, the adaptive stuffing box gland in sleeve bottom, the sleeve middle part forms oil pocket; It is characterized in that: the spool oil duct is set in described spool, and the import of described spool oil duct and the activity of sleeve oil duct are adaptive, and the outlet of spool oil duct is communicated with oil pocket; The import of described spool oil duct is spiral notch.
2. the hydrovalve of lift range variable according to claim 1, it is characterized in that: described sleeve arranges operative gear outward.
3. the hydrovalve of lift range variable according to claim 1 and 2 is characterized in that: return spring also is set on the described spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910190522.1A CN101713308B (en) | 2009-09-29 | 2009-09-29 | Hydraulic valve mechanism of variable valve lift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910190522.1A CN101713308B (en) | 2009-09-29 | 2009-09-29 | Hydraulic valve mechanism of variable valve lift |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101713308A CN101713308A (en) | 2010-05-26 |
| CN101713308B true CN101713308B (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910190522.1A Active CN101713308B (en) | 2009-09-29 | 2009-09-29 | Hydraulic valve mechanism of variable valve lift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101713308B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383892B (en) * | 2011-09-28 | 2013-08-28 | 上海交通大学 | Variable air valve lift mechanism of internal combustion engine |
| US8820279B2 (en) * | 2012-05-14 | 2014-09-02 | GM Global Technology Operations LLC | Engine including oil pressure passage with air bleed |
| CN107143393B (en) * | 2017-06-02 | 2018-09-28 | 中国北方发动机研究所(天津) | A kind of internal combustion engine hydraulic variable valve mechanism |
| WO2021139564A1 (en) * | 2020-01-10 | 2021-07-15 | 潍坊力创电子科技有限公司 | Fully variable electro-hydraulic valve system |
| CN116771460B (en) * | 2023-08-17 | 2023-11-07 | 潍坊力创电子科技有限公司 | Hydraulic full-lift continuously variable valve system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0787897A2 (en) * | 1996-02-05 | 1997-08-06 | Honda Giken Kogyo Kabushiki Kaisha | Suction air control apparatus of internal combustion engine |
| CN2359471Y (en) * | 1999-02-13 | 2000-01-19 | 朱裕丰 | Internal-combustion engine of increasing flame propagation speed in burning process |
| CN2411349Y (en) * | 2000-02-24 | 2000-12-20 | 李子海 | Oil-control-type carburetor for vehicle |
| CN2755289Y (en) * | 2004-07-14 | 2006-02-01 | 余坚 | Stepless variable lifting mechanism of valve for IC engine |
| CN101457677A (en) * | 2008-12-31 | 2009-06-17 | 奇瑞汽车股份有限公司 | Valve variable valve mechanism |
-
2009
- 2009-09-29 CN CN200910190522.1A patent/CN101713308B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0787897A2 (en) * | 1996-02-05 | 1997-08-06 | Honda Giken Kogyo Kabushiki Kaisha | Suction air control apparatus of internal combustion engine |
| CN2359471Y (en) * | 1999-02-13 | 2000-01-19 | 朱裕丰 | Internal-combustion engine of increasing flame propagation speed in burning process |
| CN2411349Y (en) * | 2000-02-24 | 2000-12-20 | 李子海 | Oil-control-type carburetor for vehicle |
| CN2755289Y (en) * | 2004-07-14 | 2006-02-01 | 余坚 | Stepless variable lifting mechanism of valve for IC engine |
| CN101457677A (en) * | 2008-12-31 | 2009-06-17 | 奇瑞汽车股份有限公司 | Valve variable valve mechanism |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2007－332834A 2007.12.27 |
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| Publication number | Publication date |
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| CN101713308A (en) | 2010-05-26 |
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