CN108757084A - The inlet valve means and diesel engine of port timing two-stage switching - Google Patents
The inlet valve means and diesel engine of port timing two-stage switching Download PDFInfo
- Publication number
- CN108757084A CN108757084A CN201810684681.6A CN201810684681A CN108757084A CN 108757084 A CN108757084 A CN 108757084A CN 201810684681 A CN201810684681 A CN 201810684681A CN 108757084 A CN108757084 A CN 108757084A
- Authority
- CN
- China
- Prior art keywords
- inlet valve
- pressure
- plunger shaft
- valve means
- port timing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
- F01L1/267—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention discloses the inlet valve means and diesel engine of a kind of switching of port timing two-stage, including sequentially connected cam, tappet guide rod group, rocking arm, changeable air valve bridge and inlet valve, further include：Inlet valve drives piston, inlet valve driving piston can offset with rocking arm, and the plunger shaft of accommodating above-mentioned inlet valve driving piston is provided in changeable air valve bridge, wherein, the high-pressure side of the plunger shaft by high-pressure oil passage and working connection can break-make unicom, and the low-pressure end of plunger shaft is by low pressure oil way and working connection unicom, in order to ensure the foundation of plunger shaft internal pressure, guarantee has enough opened by pressure valves, and the check valve be connected from low-pressure end to high-pressure side is provided in plunger shaft.Cam in the application is more lift cams with two kinds of cam profiles of height, can take into account requirement of two kinds of different operating modes to port timing, realizes the optimal of engine performance and emissions object.And the inlet valve driving piston and hydraulic circuit being arranged realize the switching to cam lift.
Description
Technical field
The present invention relates to Diesel Engine Technique Fields, specifically, are related to a kind of inlet valve dress of port timing two-stage switching
It sets and diesel engine.
Background technology
With the deterioration of environment and the influence of greenhouse effects, while people pay close attention to conventional diesel Pollution from the engine exhaust,
Also the discharge of carbon dioxide is increasingly paid close attention to, this is just needed can to the realization of more variables in diesel technology route escalation process
Control.
Wherein, main device of the valve actuating mechanism as diesel engine air inlet system, main function are the works according to engine
The requirement of work sequence and working cycles, time opening and the inlet and exhaust valve for closing each cylinder make new gas enter cylinder, and exhaust gas is from cylinder
Discharge.It is to air inflow, the performance and discharge index for being related to diesel engine whether flexibly control of port timing.
But what present diesel engine mostly used is fixed port timing, i.e. the port timing under full load full working scope is
Uniquely, it is unfavorable for realizing the flexible control to gas handling system in this way, realizes diesel engine performance optimal under full working scope.
Therefore, the inlet valve means for how providing a kind of switching of port timing two-stage are carried with realizing the switching of port timing
High diesel engine performance, is a technical problem that technical personnel in the field need to solve at present.
Invention content
In view of this, the present invention provides a kind of inlet valve means of port timing two-stage switching, to realize port timing
Switching, improve diesel engine performance.The present invention also provides a kind of inlet valve means with the switching of above-mentioned port timing two-stage
Diesel engine.
To achieve the above object, the present invention provides the following technical solutions：
A kind of inlet valve means of port timing two-stage switching, including sequentially connected cam, tappet guide rod group, rocking arm,
Changeable air valve bridge and inlet valve further include：
Inlet valve drives piston, the inlet valve driving piston that can offset with the rocking arm；
The plunger shaft of the accommodating inlet valve driving piston, the high pressure of the plunger shaft are provided in the changeable air valve bridge
End by high-pressure oil passage and working connection can break-make unicom, the low-pressure end of the plunger shaft passes through low pressure oil way and joins with the working connection
It is logical, check valve is provided between the high-pressure side and the low-pressure end, the check valve is connected from low-pressure end to high-pressure side；
The cam is more lift cams with two kinds of cam profiles of height.
Preferably, further include for controlling the high-pressure oil passage and the working connection break-make in above-mentioned inlet valve means
Control valve.
Preferably, in above-mentioned inlet valve means, the control valve is solenoid electric valve.
Preferably, in above-mentioned inlet valve means, the tappet guide rod group is with the rocking arm by the way that valve clearance is adjusted
The connection of gap adjustment bolt.
Preferably, it in above-mentioned inlet valve means, is provided in the plunger shaft for driving piston to the inlet valve
The resetting spring of reset.
A kind of diesel engine includes the inlet valve means of port timing two-stage switching, wherein the port timing two-stage switching
Inlet valve means be port timing two-stage described in any one of the above embodiments switching inlet valve means.
It can be seen via above technical scheme that the invention discloses a kind of inlet valve means of port timing two-stage switching,
Including sequentially connected cam, tappet guide rod group, rocking arm, changeable air valve bridge and inlet valve, further include：Inlet valve driving is lived
Plug, inlet valve driving piston can offset with rocking arm, and accommodating above-mentioned inlet valve driving piston is provided in changeable air valve bridge
Plunger shaft, wherein the high-pressure side of the plunger shaft by high-pressure oil passage and working connection can break-make unicom, and the low-pressure end of plunger shaft
By low pressure oil way and working connection unicom, in order to ensure that the foundation of plunger shaft internal pressure, guarantee have enough opened by pressure gas
, it is provided with the check valve be connected from low-pressure end to high-pressure side in plunger shaft.Cam in the application is convex with two kinds of height
The more lift cams for taking turns molded line can take into account requirement of two kinds of different operating modes to port timing, realize engine performance and discharge
Target it is optimal.And the inlet valve driving piston and hydraulic circuit being arranged realize the switching to cam lift.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of the inlet valve means of port timing two-stage provided in an embodiment of the present invention switching；
Fig. 2 is the datagram of the first lift of inlet valve means provided in an embodiment of the present invention；
Fig. 3 is the datagram of the second lift of inlet valve means provided in an embodiment of the present invention；
Fig. 4 is the structural representation of the cam of the inlet valve means of port timing two-stage provided in an embodiment of the present invention switching
Figure.
Specific implementation mode
Core of the invention is to provide a kind of inlet valve means of port timing two-stage switching, to realize cutting for port timing
It changes, improves diesel engine performance.Another core of the present invention is to provide a kind of inlet valve with the switching of above-mentioned port timing two-stage
The diesel engine of device.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As Figure 1-Figure 4, the invention discloses a kind of inlet valve means of port timing two-stage switching, including connect successively
Cam 1, tappet guide rod group 2, rocking arm 3, changeable air valve bridge 6 and the inlet valve 12 connect further include：Inlet valve drives piston 5, should
Inlet valve driving piston 5 can offset with rocking arm 3, and accommodating above-mentioned inlet valve driving piston 5 is provided in changeable air valve bridge 6
Plunger shaft, wherein the high-pressure side of the plunger shaft by high-pressure oil passage 8 and working connection 10 can break-make unicom, and the low pressure of plunger shaft
End is by low pressure oil way 11 and 10 unicom of working connection, in order to ensure that the foundation of plunger shaft internal pressure, guarantee have enough pressure
Valve is opened, the check valve 7 be connected from low-pressure end to high-pressure side is provided in plunger shaft.Cam 1 in the application is with height
More lift cams of low two kinds of cam profiles can take into account requirement of two kinds of different operating modes to port timing, realize engine
It can be optimal with emissions object.And the inlet valve driving piston 5 and hydraulic circuit being arranged realize the switching to 1 lift of cam.
In order to realize that the control of high-pressure oil passage 8 and 10 break-make of working connection, inlet valve means disclosed herein further includes
Control valve 9, and the control valve 9 is arranged between high-pressure oil passage 8 and working connection 10.Specifically, the control valve 9 is Electromagnetic Control
The control valve manually controlled can also be used in valve in practice.By using solenoid electric valve as control device, diesel engine is utilized
Lubrication pressure can guarantee the quick, accurate of switching action as driving force source.
In preferred embodiment, above-mentioned tappet guide rod group 2 adjusts spiral shell with rocking arm 3 by the gap in adjustable gap of entering
Bolt 4 connects.By adjusting gap adjustment bolt 4 that the position of rocking arm 3 is adjusted, to adjust the gap of inlet valve.
The control process of inlet valve means in the application：
Firstly, for the adjustment of valve clearance.In order to realize the predetermined function of the inlet valve means, it is right first to need
Valve clearance is adjusted.It is put into certain thickness between changeable air valve bridge 6 and rocking arm 3 shown in Fig. 1 and (root is needed for thickness
Be configured according to the low lift of cam, the lift of cam can be selected according to different) clearance gauge, adjust gap
Adjustment bolt 4 then takes out clearance gauge, under the action of resetting spring, there will be certain valves at plunger shaft to very close to each other
Gap.
When needing normal valve lift to work, control valve 9 is in opening state, at this time high-pressure oil passage 8 and low pressure oil way
11 all connect with working connection 10, and pressure is identical, and inlet valve drives the insufficient pressure under piston 5 to meet the needs of valve opening,
The low lift profile 51 of cam as shown in Figure 3 is balanced out by gap, and valve actual lift is as shown in Fig. 2 broken string curves.The application
In the low lift profile 51 of cam be in Fig. 4, apart from closer one section in the center of circle, both high lift 52 is in Fig. 4, apart from the center of circle
Farther out one section.
When needing to be switched to Miller valve stroke, control valve 9 is in closed state, work of the high-pressure oil passage 8 in check valve 7
It is disconnected with low pressure oil way 11 with lower, high-pressure oil passage 8 disconnects under the action of control valve 9 with working connection 10, and high-pressure oil passage 8
Pressure gradually increased with the promotion of rocking arm, i.e., inlet valve drive piston 5 pressure under, cam as shown in Figure 4 it is low
Lift profile 51 works, and valve actual lift is as shown in Fig. 3 broken string curves.
In practice, more lift cams in the application can be set to symmetrical structure, in addition, also can be according to different need
It is set as not being symmetrical structure, the core of the application is, in 1 rotation process of cam, there are two types of lifts for tool.
In order to realize that inlet valve drives the reset of piston 5, it is provided in plunger shaft for multiple to inlet valve driving piston 5
The resetting spring of position.
Pure hydraulic device is used for the control device that cam lift is adjusted in the application, it is simple and compact for structure, to starting
The change of machine ontology is smaller；It directly uses the lubricating oil on engine as pressure source, does not increase additional auxiliary device；Using electricity
Magnetic control valve controls, and response is rapid, accurate, can realize the accurate switching to different air valve lift.
In addition, disclosed herein as well is a kind of diesel engine, include the inlet valve means of port timing two-stage switching, and this is matched
The inlet valve means of gas phase two-stage switching are the inlet valve means of port timing two-stage switching disclosed in above-described embodiment, because
This, the diesel engine of the inlet valve means with port timing two-stage switching is also with above-mentioned all technique effects, herein no longer
It repeats one by one.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (6)
1. a kind of inlet valve means of port timing two-stage switching, including sequentially connected cam (1), tappet guide rod group (2), shake
Arm (3), changeable air valve bridge (7) and inlet valve (12), which is characterized in that further include：
Inlet valve drives piston (5), the inlet valve driving piston (5) that can offset with the rocking arm (3)；
The plunger shaft of the accommodating inlet valve driving piston (5), the height of the plunger shaft are provided in the changeable air valve bridge (7)
Pressure side by high-pressure oil passage (8) and working connection (10) can break-make unicom, the low-pressure end of the plunger shaft passes through low pressure oil way (11)
With the working connection (10) unicom, check valve (7), the check valve (7) are provided between the high-pressure side and the low-pressure end
It is connected from low-pressure end to high-pressure side；
The cam (1) is more lift cams with two kinds of cam profiles of height.
2. inlet valve means according to claim 1, which is characterized in that further include for controlling the high-pressure oil passage (8)
With the control valve (9) of the working connection (10) break-make.
3. inlet valve means according to claim 2, which is characterized in that the control valve (9) is solenoid electric valve.
4. according to claim 1-3 any one of them inlet valve means, which is characterized in that the tappet guide rod group (2) and institute
It states rocking arm (3) and is connected by the way that the gap adjustment bolt (4) of valve clearance is adjusted.
5. according to claim 1-3 any one of them inlet valve means, which is characterized in that be provided with and be used in the plunger shaft
The resetting spring that inlet valve driving piston (5) is resetted.
6. a kind of diesel engine includes the inlet valve means of port timing two-stage switching, which is characterized in that the port timing two-stage
The inlet valve means of switching are the inlet valve means of port timing two-stage as described in any one in claim 1-5 switching.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810684681.6A CN108757084A (en) | 2018-06-28 | 2018-06-28 | The inlet valve means and diesel engine of port timing two-stage switching |
| US17/255,300 US20210262367A1 (en) | 2018-06-28 | 2018-09-04 | Intake Valve Device Capable of Implementing Two-Stage Switching of Gas Distribution Phase and Diesel Engine |
| PCT/CN2018/103891 WO2020000640A1 (en) | 2018-06-28 | 2018-09-04 | Intake valve device capable of implementing two-stage switching of gas distribution phase and diesel engine |
| EP18924936.0A EP3816415A4 (en) | 2018-06-28 | 2018-09-04 | Intake valve device capable of implementing two-stage switching of gas distribution phase and diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810684681.6A CN108757084A (en) | 2018-06-28 | 2018-06-28 | The inlet valve means and diesel engine of port timing two-stage switching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108757084A true CN108757084A (en) | 2018-11-06 |
Family
ID=63974187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810684681.6A Pending CN108757084A (en) | 2018-06-28 | 2018-06-28 | The inlet valve means and diesel engine of port timing two-stage switching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108757084A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07301107A (en) * | 1994-03-07 | 1995-11-14 | Komatsu Ltd | Opening and closing control device for intake valve for miller cycle engine |
| JPH0941926A (en) * | 1995-08-03 | 1997-02-10 | Mitsubishi Motors Corp | Compression open-type engine auxiliary brake device |
| JPH09317421A (en) * | 1996-05-31 | 1997-12-09 | Jidosha Buhin Kogyo Kk | Engine brake device |
| JP2001115810A (en) * | 1999-10-20 | 2001-04-24 | Toyota Motor Corp | Variable valve system for internal combustion engine |
| JP2004084627A (en) * | 2002-08-28 | 2004-03-18 | Nippon Piston Ring Co Ltd | Valve mechanism |
| JP2004360485A (en) * | 2003-06-02 | 2004-12-24 | Mitsubishi Fuso Truck & Bus Corp | Valve system cut-off device of internal combustion engine |
| US20050211206A1 (en) * | 2004-03-15 | 2005-09-29 | Brian Ruggiero | Valve bridge with integrated lost motion system |
| US20100170471A1 (en) * | 2009-01-05 | 2010-07-08 | Zhou Yang | Engine braking apparatus with two-level pressure control valves |
| CN106368754A (en) * | 2016-08-29 | 2017-02-01 | 潍柴动力股份有限公司 | Intake valve device, air distribution system and air distribution phase switching method |
| CN107060941A (en) * | 2017-06-07 | 2017-08-18 | 大连理工大学 | A kind of twin cam shaft switch fulcrum type becomes pattern valve-driving system |
| CN208900149U (en) * | 2018-06-28 | 2019-05-24 | 潍柴动力股份有限公司 | The inlet valve means and diesel engine of port timing two-stage switching |
-
2018
- 2018-06-28 CN CN201810684681.6A patent/CN108757084A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07301107A (en) * | 1994-03-07 | 1995-11-14 | Komatsu Ltd | Opening and closing control device for intake valve for miller cycle engine |
| JPH0941926A (en) * | 1995-08-03 | 1997-02-10 | Mitsubishi Motors Corp | Compression open-type engine auxiliary brake device |
| JPH09317421A (en) * | 1996-05-31 | 1997-12-09 | Jidosha Buhin Kogyo Kk | Engine brake device |
| JP2001115810A (en) * | 1999-10-20 | 2001-04-24 | Toyota Motor Corp | Variable valve system for internal combustion engine |
| JP2004084627A (en) * | 2002-08-28 | 2004-03-18 | Nippon Piston Ring Co Ltd | Valve mechanism |
| JP2004360485A (en) * | 2003-06-02 | 2004-12-24 | Mitsubishi Fuso Truck & Bus Corp | Valve system cut-off device of internal combustion engine |
| US20050211206A1 (en) * | 2004-03-15 | 2005-09-29 | Brian Ruggiero | Valve bridge with integrated lost motion system |
| US20100170471A1 (en) * | 2009-01-05 | 2010-07-08 | Zhou Yang | Engine braking apparatus with two-level pressure control valves |
| CN106368754A (en) * | 2016-08-29 | 2017-02-01 | 潍柴动力股份有限公司 | Intake valve device, air distribution system and air distribution phase switching method |
| CN107060941A (en) * | 2017-06-07 | 2017-08-18 | 大连理工大学 | A kind of twin cam shaft switch fulcrum type becomes pattern valve-driving system |
| CN208900149U (en) * | 2018-06-28 | 2019-05-24 | 潍柴动力股份有限公司 | The inlet valve means and diesel engine of port timing two-stage switching |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102105657B (en) | Control arrangement in piston engine | |
| JP2020523512A (en) | Variable mode valve drive system | |
| WO2018223804A1 (en) | Valve actuation system with variable modes | |
| CN201162550Y (en) | Electric-hydraulic control variable-distribution apparatus of diesel engine | |
| US11111825B1 (en) | Hydraulic valve mechanism with variable valve opening times and internal combustion engine | |
| CN105324562A (en) | Controller for variable valve mechanism | |
| CN208900149U (en) | The inlet valve means and diesel engine of port timing two-stage switching | |
| CN101377138B (en) | Sliding valve type two-mode engine intake valve delaying shutdown system | |
| CN105156166B (en) | The quick VVT and VVL devices of piezo-electric crystal electric-controlled hydraulic and its control method | |
| CN108894847B (en) | Control system of direct-push type single-cavity supercharging variable-discharge oil pump | |
| JP6846419B2 (en) | Methods for Diesel Engines and Diesel Engines | |
| CN104018905B (en) | Become two-stroke engine fluid pressure type distribution switching mechanism | |
| CN106368754B (en) | A kind of inlet valve means, air distribution system and port timing switching method | |
| WO2020000640A1 (en) | Intake valve device capable of implementing two-stage switching of gas distribution phase and diesel engine | |
| CN106640252B (en) | A kind of axial displacement multi-mode hydraulic variable valve drive system | |
| CN106854999B (en) | A kind of mobile two stages Variabale valve actuation system of intensive style hydraulic axial and its control method | |
| CN108757084A (en) | The inlet valve means and diesel engine of port timing two-stage switching | |
| CN106089455B (en) | The adjusting method and device of engine compression ratio continuous variable | |
| CN106762011B (en) | A kind of compact multimode formula Variabale valve actuation system | |
| CN106545381B (en) | A kind of axial displacement multi-mode four-bar Variabale valve actuation system | |
| CN115182800B (en) | Hydraulic valve mechanism for realizing different lift of same-name valve | |
| KR101305200B1 (en) | Electro-hydraulic variable vavlve lift system | |
| CN107842407B (en) | A kind of variable valve actuator for air that 2/4 stroke can be achieved and exchanges | |
| CN115013108A (en) | Internal combustion engine hydraulic valve mechanism with variable opening times | |
| JP2017115850A (en) | System for variably operating valve of internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |