CN108361088A - A kind of diesel engine hydraulic variable valve actuator for air and working method - Google Patents
A kind of diesel engine hydraulic variable valve actuator for air and working method Download PDFInfo
- Publication number
- CN108361088A CN108361088A CN201810353585.3A CN201810353585A CN108361088A CN 108361088 A CN108361088 A CN 108361088A CN 201810353585 A CN201810353585 A CN 201810353585A CN 108361088 A CN108361088 A CN 108361088A
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- oil
- valve
- diesel engine
- cavity
- oil circuit
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000003921 oil Substances 0.000 claims abstract description 86
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 15
- 230000009471 action Effects 0.000 claims abstract description 7
- 238000005086 pumping Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 239000003054 catalyst Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 208000002925 dental caries Diseases 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
-
- 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
- F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The present invention relates to a kind of diesel engine hydraulic variable valve actuator for air and working methods, including building press mechanism, it is described to build press mechanism and the first oil circuit connection, first oil circuit is connect with high-voltage oil cavity, the high-voltage oil cavity is connect with executing agency, building press mechanism pushes hydraulic oil to enter high-voltage oil cavity by the first oil circuit, the action of executing agency is driven using the pressure of hydraulic oil in high-voltage oil cavity, the one end for powering off normally closed control valve is connected on first oil circuit, the other end of the control valve connects low pressure oil pocket, requirement of the valve mechanism of the present invention to solenoid valve is low, realize the flexible control of valve opening, reduce oil consumption.
Description
Technical field
The present invention relates to technical field of engines, and in particular to a kind of diesel engine hydraulic variable valve actuator for air and work side
Method.
Background technology
State's six emission regulation demands diesel engine tests cycle is recycled using WHTC, and WHTC cycles are recycled compared to original ETC,
Operating point, which is distributed to speed operation, to be shifted, and low row's temperature operating mode greatly increases.It is current exhaust aftertreatment system using SCR purification schemes
More reliable technology path in system, catalyst are the cores of SCR technology, and different catalyst has different Applicable temperature models
It encloses, nitrogen oxides decrease in efficiency when lower limit, and side reaction can occur on catalyst, reduce and reacted with nitrogen oxides, and
And product is attached to the surface of catalyst, the channel of blocking catalyst and micropore, reduces the activity of catalyst.If reaction temperature
Degree is higher than the Applicable temperature of catalyst, and catalyst equally loses activity.
In order to meet the requirement of emission regulation, Diesel Engine Plant will improve WHTC circulating exhaust temperature, improve nitrogen oxides
Transformation efficiency reduces the hazardous emission of diesel engine.It is a kind of effective control means to adjust charge flow rate control row's temperature, at present
Generally use this simple control method of intake-air throttle valve.
Intake-air throttle valve is too far away from cylinder in air inlet pipe front end, can cause pumping loss, unfavorable to oil consumption.
Invention content
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of full changeable air valve machine of diesel engine hydraulic
Structure reduces the pumping loss of diesel engine compared with existing diesel engine spiracle mechanism, reduces and responds speed to switch electromagnetic valve
The requirement of degree and service life, and realize the flexible control of valve opening.
To achieve the above object, the present invention uses following technical proposals：
A kind of diesel engine hydraulic variable valve actuator for air, including build press mechanism, it is described to build press mechanism and the first oil circuit connection,
One oil circuit is connect with high-voltage oil cavity, and the high-voltage oil cavity is connect with executing agency, builds press mechanism and hydraulic oil is pushed to pass through the first oil
Road enters high-voltage oil cavity, and the action of executing agency is driven using the pressure of hydraulic oil, it is normal that power-off is connected on first oil circuit
The other end of one end of the control valve closed, the control valve connects low pressure oil pocket.
Further, the control valve is solenoid valve.
Further, the press mechanism of building includes tappet, and described tappet one end is contacted with cam mechanism, the other end and mandril
One end be fixedly connected, the other end of the mandril is connected with plunger part, and the plunger part has the column being connect with mandril
Plug, can push hydraulic oil to be flowed into high-voltage oil cavity by the first oil circuit.
Further, the first spring is cased with outside the mandril, the first spring one end is fixedly connected with plunger part, another
End is fixedly connected with mandril, and the pressure of the first spring can drive mandril and tappet to the movement in cam direction.
Further, the executing agency includes piston element and valve, and the piston element, which has, is located at high-voltage oil cavity
The end of internal piston, the piston and valve connects, and drives the movement of valve.
Further, the second spring for driving valve to be moved to piston element direction is arranged on the valve.
Further, second oil circuit one end, the other end of the second oil circuit are connected on the high-voltage oil cavity or the first oil circuit
It is connected to low pressure oil pocket, check valve is installed on second oil circuit.
The present invention also provides a kind of working methods of diesel engine hydraulic variable valve actuator for air：
When diesel engine high speed full load operation, control valve power-failure close, cam mechanism driving tappet, mandril, on plunger
Row pushes hydraulic oil to enter high-voltage oil cavity by the first oil circuit, under the piston of the hydraulic oil pushing executing mechanism in high-voltage oil cavity
Row drives valve downlink, valve to open, cam mechanism driving tappet, mandril, plunger downlink, hydraulic fluid pressure in high-voltage oil cavity
Reduce, valve return is closed.
When diesel engine low speed light running, valve is opened to after to a certain degree, control valve is powered and is opened, high pressure oil into
Enter low pressure oil pocket pressure release, valve return under the action of the spring, valve-closing.
Beneficial effects of the present invention：
1. the valve mechanism of the present invention, when diesel engine high speed full load operation, control valve is cold, is greatly reduced
Requirement to control valve response speed and service life.
2. the valve mechanism of the present invention is powered and is powered off by control valve, can realize the adjusting of valve opening size, real
The flexible control for having showed valve opening meets the demand that cylinder of diesel engine air inflow is adjusted under different operating modes, avoids tradition
Diesel engine using intake-air throttle valve carry out air inflow adjusting control present in pumping loss defect, reduce oil consumption.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the restriction to the application for explaining the application.
Fig. 1 is overall structure of the present invention；
Fig. 2 is enlarged drawing at the A in Fig. 1 of the present invention；
Fig. 3 is operation principle schematic diagram of the present invention；
Wherein, 1. tappet, 2. mandrils, 3. plunger parts, 31. plunger cases, 4. first oil circuits, 5. piston elements, 51. pistons
Cylinder, 6. valves, 7. solenoid valves, 8. first springs, 9. second springs, 10. baffles, 11. baffle rings, 12. check valves.
Specific implementation mode
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
As background technology is introduced, existing diesel intake-air throttle valve is too far away from cylinder in air inlet pipe front end, can make
It is unfavorable to oil consumption at pumping loss, in view of the above-mentioned problems, present applicant proposes a kind of diesel engine hydraulic variable valve actuator for air.
In a kind of exemplary embodiment of the application, as shown in Figs. 1-3, a kind of diesel engine hydraulic variable valve actuator for air, packet
It includes and builds press mechanism, the press mechanism of building includes tappet 1, and one end of the tappet is contacted with cam mechanism, and the cam mechanism is adopted
With the valve opening and closing cam mechanism on existing diesel, cam mechanism has cam drive by driving mechanism, cam with endure
Column one end is in contact, and the tappet other end is fixedly connected with one end of mandril 2, and the mandril other end is connected with plunger part 3, institute
It includes fixed plunger case 31 to state plunger part, and being equipped in the plunger case can be along the plunger that it is axially moved (in figure not
Mark), plunger steel is divided into two cavitys by plunger, and mandril, which is stretched into the cavity of the side of lower section and fixed with plunger, to be connected
It connecing, the cavity of the other side is connected to the first oil circuit 4, and first oil circuit is connected to the high-voltage oil cavity inside Liang Ge executing agencies,
The executing agency includes piston element 5 and valve 6, and the piston element includes fixed piston cylinder 51 and is located at piston
Cylinder interior can will be divided into two cavitys, valve along the piston (not marked in figure) of its axial movement, piston inside piston cylinder
One of cavity inside is stretched into, and is fixedly connected with the piston, another cavity is connected as high-voltage oil cavity with the first oil circuit
It is logical, it is connected on first oil circuit and powers off normally closed control valve, the control valve is described using the normally closed solenoid valve 7 of power-off
Solenoid valve one end is connected with the first oil circuit, and the other end connects a low pressure oil pocket.
The outside of the mandril is cased with the first spring 8, the end connection of first spring one end and plunger case, the other end
It is fixedly connected with the baffle 10 being fixed on the circumference of mandril side, when mandril moves upwards, baffle compresses the first spring, makes the first bullet
Spring generates the pressure to tappet direction.
Second spring 9 is cased on described two valves, the casing wall of cylinder of diesel engine is fixed in one end of the second spring
On, the ends of described two valves has a baffle ring 11, and the baffle ring can be used nut, and when valve opening, valve is to diesel engine gas
The direction of cylinder moves, and baffle ring can generate pressure to second spring.
The high-voltage oil cavity is living or the first oil circuit connection has 5 one end of the second oil circuit, the second oil circuit other end to connect low pressure oil
Chamber, second oil circuit are equipped with check valve 12, the leakage loss for supplementing hydraulic oil in high-voltage oil cavity.
The present invention also provides a kind of working methods of diesel engine hydraulic variable valve actuator for air：
When diesel engine high speed full load operation, solenoid valve power-failure close, high-voltage oil cavity and low pressure oil pocket disconnect, cam machine
The cam of structure rotates, when cam moves closer to the tip of cam with tappet contact portion, cam driven tappet, mandril, plunger
Uplink, plunger push hydraulic oil to enter high-voltage oil cavity by the first oil circuit, the hydraulic oil pushing executing mechanism in high-voltage oil cavity
Descent of piston drives valve downlink, and valve is opened, when the contact portion of cam and tappet moves closer to the circular arc portion of cam
When, under the action of the first spring, tappet, mandril, plunger downlink, hydraulic fluid pressure reduces in high-voltage oil cavity, and valve is second
Return under the action of spring, valve-closing.
During high speed full load operation, solenoid valve is in power-off closed state always, greatly reduces to solenoid valve
The requirement of response speed and service life.
When diesel engine low speed light running, plunger rising makes valve open to after to a certain degree, and solenoid valves are beaten
It opens, high-voltage oil cavity is connected to low pressure oil pocket, and hydraulic oil enters the progress pressure release of low pressure oil pocket in high-voltage oil cavity, and valve is in second spring
The lower return of effect, valve-closing.During plunger uplink and downlink at this time, valve all remains off, solenoid valve power-off, gas
Door is gradually opened again, is opened to solenoid valves rear to a certain degree, valve-closing, reciprocation cycle passes through and sets solenoid valve break-make
The electric time realizes the adjusting of valve opening size, meets the demand that cylinder of diesel engine air inflow is adjusted under different operating modes, avoids
Traditional diesel engine carries out the defect of the pumping loss present in air inflow adjusting control using intake-air throttle valve, reduces oil
Consumption.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (7)
1. a kind of diesel engine hydraulic variable valve actuator for air, which is characterized in that described to build press mechanism and the first oil including building press mechanism
Road connects, and the first oil circuit is connect with high-voltage oil cavity, and the high-voltage oil cavity is connect with executing agency, builds press mechanism and pushes hydraulic oil logical
Cross the first oil circuit and enter high-voltage oil cavity, using in high-voltage oil cavity hydraulic oil pressure drive executing agency action, described first
The one end for powering off normally closed control valve is connected on oil circuit, the other end of the control valve connects low pressure oil pocket.
2. a kind of diesel engine hydraulic variable valve actuator for air as described in claim 1, which is characterized in that the control valve is electromagnetism
Valve.
3. a kind of diesel engine hydraulic variable valve actuator for air as described in claim 1, which is characterized in that the press mechanism of building includes
Tappet, described tappet one end are contacted with cam mechanism, and the other end is fixedly connected with one end of mandril, and the other end of the mandril connects
It is connected to plunger part, the plunger part has what is connect with mandril to be used to that hydraulic oil to be pushed to flow to high pressure oil by the first oil circuit
The plunger of chamber.
4. a kind of diesel engine hydraulic variable valve actuator for air as described in claim 1, which is characterized in that be cased with outside the mandril
First spring, the first spring one end are fixedly connected with plunger part, and the other end is fixedly connected with mandril.
5. a kind of diesel engine hydraulic variable valve actuator for air as described in claim 1, which is characterized in that be arranged on the valve
Second spring for driving valve to be moved to piston element direction.
6. a kind of diesel engine hydraulic variable valve actuator for air as described in claim 1, which is characterized in that the high-voltage oil cavity or the
Second oil circuit one end is connected on one oil circuit, the other end of the second oil circuit is connected to low pressure oil pocket, is installed on second oil circuit
There is check valve.
7. a kind of working method of claim 1-6 any one of them valve mechanisms, which is characterized in that
When diesel engine high speed full load operation, control valve power-failure close, cam mechanism driving tappet, mandril, plunger uplink push away
Hydrodynamic pressure oil enters high-voltage oil cavity by the first oil circuit, the descent of piston of the hydraulic oil pushing executing mechanism in high-voltage oil cavity, band
It takes offence a downlink, valve is opened, cam mechanism driving tappet, mandril, plunger downlink, and hydraulic fluid pressure reduces in high-voltage oil cavity,
Valve return is closed；
When diesel engine low speed light running, valve is opened to after to a certain degree, control valve is powered and is opened, and high pressure oil enters low
Pumping cavity pressure release, valve return under the action of the spring, valve-closing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810353585.3A CN108361088A (en) | 2018-04-19 | 2018-04-19 | A kind of diesel engine hydraulic variable valve actuator for air and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810353585.3A CN108361088A (en) | 2018-04-19 | 2018-04-19 | A kind of diesel engine hydraulic variable valve actuator for air and working method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108361088A true CN108361088A (en) | 2018-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810353585.3A Pending CN108361088A (en) | 2018-04-19 | 2018-04-19 | A kind of diesel engine hydraulic variable valve actuator for air and working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108361088A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116557100A (en) * | 2023-07-11 | 2023-08-08 | 龙口中宇热管理系统科技有限公司 | Engine hydraulic variable valve mechanism and working method |
| CN117345370A (en) * | 2023-12-04 | 2024-01-05 | 龙口中宇热管理系统科技有限公司 | Engine hydraulic three-stage variable valve control mechanism, engine and method |
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| US20130255612A1 (en) * | 2008-07-22 | 2013-10-03 | Eaton Corporation | System to diagnose variable valve actuation malfunctions by monitoring fluid pressure in a control gallery |
| CN204200298U (en) * | 2014-10-14 | 2015-03-11 | 中国第一汽车股份有限公司 | A kind of motor electrolyte type variable valve actuation mechanism having cam |
| CN107060937A (en) * | 2017-02-20 | 2017-08-18 | 山东大学 | Full hydraulic variable valve mechanism valve stroke control device and internal combustion engine |
| CN208184806U (en) * | 2018-04-19 | 2018-12-04 | 龙口中宇热管理系统科技有限公司 | A kind of diesel engine hydraulic variable valve actuator for air |
-
2018
- 2018-04-19 CN CN201810353585.3A patent/CN108361088A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130255612A1 (en) * | 2008-07-22 | 2013-10-03 | Eaton Corporation | System to diagnose variable valve actuation malfunctions by monitoring fluid pressure in a control gallery |
| CN204200298U (en) * | 2014-10-14 | 2015-03-11 | 中国第一汽车股份有限公司 | A kind of motor electrolyte type variable valve actuation mechanism having cam |
| CN107060937A (en) * | 2017-02-20 | 2017-08-18 | 山东大学 | Full hydraulic variable valve mechanism valve stroke control device and internal combustion engine |
| CN208184806U (en) * | 2018-04-19 | 2018-12-04 | 龙口中宇热管理系统科技有限公司 | A kind of diesel engine hydraulic variable valve actuator for air |
Non-Patent Citations (1)
| Title |
|---|
| 李明等: "燃气工程技术和安全管理", vol. 1, 31 August 2012, pages: 201 - 202 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116557100A (en) * | 2023-07-11 | 2023-08-08 | 龙口中宇热管理系统科技有限公司 | Engine hydraulic variable valve mechanism and working method |
| CN116557100B (en) * | 2023-07-11 | 2023-10-20 | 龙口中宇热管理系统科技有限公司 | Engine hydraulic variable valve mechanism and working method |
| CN117345370A (en) * | 2023-12-04 | 2024-01-05 | 龙口中宇热管理系统科技有限公司 | Engine hydraulic three-stage variable valve control mechanism, engine and method |
| CN117345370B (en) * | 2023-12-04 | 2024-02-27 | 龙口中宇热管理系统科技有限公司 | Engine hydraulic three-stage variable valve control mechanism, engine and method |
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