CN106368760B - A kind of slow mechanism of taking a seat of engine valve - Google Patents
A kind of slow mechanism of taking a seat of engine valve Download PDFInfo
- Publication number
- CN106368760B CN106368760B CN201610762412.8A CN201610762412A CN106368760B CN 106368760 B CN106368760 B CN 106368760B CN 201610762412 A CN201610762412 A CN 201610762412A CN 106368760 B CN106368760 B CN 106368760B
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- Prior art keywords
- valve
- brake
- seat
- driven plunger
- taking
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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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
-
- 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
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention belongs to engine variable-valve actuator design field, be related to a kind of slow mechanism of taking a seat of engine valve, it includes check valve of the centre with throttle orifice and with the matched spool of throttle orifice.When air valve drop, spool is gradually reduced the circulation area of machine oil with throttle orifice cooperation, to increase machine oil circulating resistance, reduces flowing velocity, slows down valve crash speed.The mechanism also integrates the hydraulic lash adjuster generally used, has the function of automatically adjusting valve clearance.The slow mechanism structure of taking a seat of inventive engine valve is simple, it is matched with brake spool by the check valve with brake valve core bore and realizes that valve is slow and take a seat and quick open function, such structure brake check valve need not move, and high pressure oil compression shock caused by being not subject to valve opening moment, reliability of structure and service life are improved, and reduces processing and manufacturing difficulty.
Description
Technical field
The invention belongs to engine variable-valve actuator design fields, and in particular to a kind of variable gas of cam electric-liquid type
Door executing agency, the more particularly to slow mechanism of taking a seat of a kind of engine valve.
Background technology
Currently, cam electric-liquid type variable valve actuation mechanism is applied in volume production vehicle, and to engine section
Can emission reduction play the role of prodigious, slow mechanism of taking a seat is the core technology for having cam electric-liquid type variable valve actuation mechanism.It is led
Act on is increased to ensure to slow down valve crash speed in air valve drop, not to valve by oil pressure in high pressure chest
It quickly opens and has a negative impact.
Patent US6474277B1 is disclosed to be cooperated by a movable spool and a movable valve disc, in gas
Door is gradually reduced the circulation area of machine oil during taking a seat, increase machine oil circulating resistance, improves engine oil pressure, is fallen to reach slow
The function of seat, and in opening process, due to the movable property of valve disc, high pressure oil can open rapidly valve disc, then open gas
Door, achievees the purpose that quickly to open.Movable valve plug, in the moment of valve opening, is lived with the movable mutually matched this structure of valve disc
Dynamic valve disc can have the intensity of valve disc relatively high requirement, and service life is deposited with reliability by larger impact force
In some problems.
Patent US2003/0172890A1 discloses the cooperation by the coupled part of driven plunger, in driven plunger uplink
Oil return oilhole is progressively closed off in the process, reduces the circulation area of machine oil, increases machine oil circulating resistance, improves engine oil pressure, to
Reach the slow function of taking a seat, and since top uses one-way valve structures so that the machine oil of high pressure chest can smoothly enter into driven column
Room is filled in, achievees the purpose that valve is quickly opened.But for this kind of structure using accurate male part cooperation, difficulty of processing is big, is manufactured into
This height.
Invention content
The purpose of the present invention is that in view of the above shortcomings of the prior art, provides a kind of slow mechanism of taking a seat of engine,
By being gradually reduced the circulation area of machine oil during air valve drop, increase engine oil flow resistance, to slow down engine valve
Seating velocity.
It is as follows in conjunction with illustrating the purpose of the present invention is what is be achieved through the following technical solutions：
A kind of engine valve slow take a seat mechanism, including outer support 10, outer support high-pressure oil duct 101, driven plunger 20, liquid
Press clearance adjuster feeding plunger 50, hydraulic lash adjuster assembly 60, interior bearing 80 and driven plunger compartment 90；
Brake spool 30, brake check valve assembly are equipped between the driven plunger compartment 90 and outer support high-pressure oil duct 101
40 and brake spool return spring 70；
The brake spool 30 is equipped with structure conical surface endless belt 31 and return spring flange 32；
The brake check valve assembly 40 is made of unidirectional valve upper cover 42, unidirectional valve base 43, stifled ball 44 and sealing ring 45,
Wherein described 40 middle part of brake check valve assembly is equipped with brake valve core bore 41, and unidirectional valve upper cover 42 is equipped with upper cover oilhole 421, single
To valve base 43 is equipped with annular oil groove 431, pedestal blocks up ball 432 and pedestal oilhole 433；
When valve opening, the machine oil in outer support high-pressure oil duct 101 can be total by brake valve core bore 41 and brake check valve
Enter driven plunger compartment 90 simultaneously at 40；When valve-closing, the machine oil in driven plunger compartment 90 can only pass through brake valve core bore 41
Outer support high-pressure oil duct 101, and taking a seat with valve are flowed back into, machine oil reflux area reduces, and reflux resistance increases, valve
Seating velocity slows down.
The brake spool 30 is clearance fit with driven plunger compartment 90.
The driven plunger 20 is to couple cooperation with driven plunger compartment 90.
The brake valve core bore 41 is located at the center of brake check valve assembly 40.
The pedestal blocks up ball 432 and is uniformly arranged on unidirectional valve base 43, quantity and 421 quantity phase of upper cover oilhole
Together, and the setting of pedestal oilhole 433 is between each pedestal blocks up ball 432.
Compared with prior art, beneficial effects of the present invention are：The slow mechanism structure of taking a seat of inventive engine valve is simple,
It is matched with brake spool by the check valve with brake valve core bore and realizes that valve is slow and take a seat and quick open function, Ci Zhongjie
Structure brake check valve need not move, and high pressure oil compression shock caused by being not subject to valve opening moment, improve structure
Reliability and service life, and reduce processing and manufacturing difficulty.
Description of the drawings
Fig. 1 is the slow mechanism valve opening state structural schematic diagram of taking a seat of inventive engine valve；
Fig. 2 is the slow mechanism valve-closing status architecture schematic diagram of taking a seat of inventive engine valve；
Fig. 3 is the slow semi-open status architecture schematic diagram of mechanism valve of taking a seat of inventive engine valve；
Fig. 4 is the slow mechanism brake check valve assembly structure decomposition diagram of taking a seat of inventive engine valve.
In figure, 10. outer support, 101. 20. driven plunger of outer support high-pressure oil duct, 30. brake spool 40. is braked unidirectionally
41. 42. unidirectional valve upper cover of brake valve core bore of valve assembly, 421. 43. unidirectional valve base of upper cover oilhole, 431. annular oil groove
432. pedestals block up 433. pedestal oilhole 44. of ball and block up 45. sealing ring of ball, 50. hydraulic lash adjuster feeding plunger, 60. liquid
Press 90. driven plunger compartment of bearing in 70. brake spool return spring 80. of clearance adjuster assembly.
Specific implementation mode
The specific embodiment that the invention will now be described in detail with reference to the accompanying drawings.
As shown in Figure 1-Figure 3, a kind of engine valve slow take a seat mechanism, including outer support 10, outer support high-pressure oil duct
101, driven plunger 20, brake spool 30, brake check valve assembly 40, hydraulic lash adjuster feeding plunger 50, hydraulic lash
REG Regulator Assembly 60, brake spool return spring 70, interior bearing 80, driven plunger compartment 90 and brake valve core bore 41.The braking
Spool 30, brake check valve assembly 40 and brake spool return spring 70 are set to driven plunger compartment 90 and outer support high-pressure oil duct
Between 101.The brake spool 30 is clearance fit with driven plunger compartment 90.The driven plunger 20 is with driven plunger compartment 90
Coupling cooperation, and after valve opening, the sealing of machine oil relies primarily on driven plunger 20 and the coupling of driven plunger compartment 90 is matched
It closes.The brake valve core bore 41 is set among brake check valve assembly 40, is particularly located at the center of brake check valve assembly 40
Position.As shown in figure 4, the brake check valve assembly 40 is by unidirectional valve upper cover 42, unidirectional valve base 43, stifled ball 44 and sealing ring
45 compositions, unidirectional valve upper cover 42 are equipped with upper cover oilhole 421, and unidirectional valve base 43 is equipped with annular oil groove 431, pedestal blocks up ball
432 and pedestal oilhole 433.The pedestal blocks up ball 432 and is uniformly arranged on unidirectional valve base 43, quantity and upper cover oilhole
421 quantity are identical, and the setting of pedestal oilhole 433 is between each pedestal blocks up ball 432.Brake spool 30 is equipped with structure taper-face ring
Shape band 31 and return spring flange 32.
The brake check valve assembly 40 is positioned between outer support high-pressure oil duct 101 and driven plunger compartment 90, and only
Machine oil is allowed to be flowed into driven plunger compartment 90 by outer support high-pressure oil duct 101, when needing valve opening, high pressure oil is by outer support
High-pressure oil duct 101 rapidly enters driven plunger compartment 90 by brake check valve assembly 40, and drives brake spool 30 and driven column
Plug 20, then drives valve；When air valve drop, the starting stage brake spool 30 taken a seat not yet enters brake valve core bore 41,
Machine oil can pass through brake valve core bore 41 and flow back to outer support high-pressure oil duct 101 by driven plunger compartment 90, when air valve drop to system
When movable valve plug 30 enters brake valve core bore 41, the reflux area for reducing brake valve core bore 41 subtracts to increase engine oil flow resistance
Deferred motivation valve crash speed.
As shown in Figure 1, when engine valve needs to open, stifled ball 44 is in pedestal and blocks up in ball 432, opens outside moment
Machine oil in bearing high-pressure oil duct 101 drives 30 downlink of brake spool, and brake spool 30 pushes driven plunger 20, by valve opening
It opens, the machine oil in outer support high-pressure oil duct 101 enters annular oil groove 431 by upper cover oilhole 421 at the same time, then passes through bottom
Seat oilhole 433 enters driven plunger compartment 90, such mechanism in the valve opening stage, machine oil can by multiple upper cover oilholes 421 and
Brake valve core bore 41 enters driven plunger compartment 90 simultaneously, does not influence driving of the high pressure oil for valve, reaches valve and quickly open
Purpose；Because brake spool 30 belongs to clearance fit with driven plunger compartment 90, driven plunger 20 belongs to driven plunger compartment 90
Male part, after valve opening outer support high-pressure oil duct 101 and 90 complete unicom of driven plunger compartment, the foundation of oil pressure rely primarily on
Driven plunger 20 and the coupling of driven plunger compartment 90 coordinate, the effect that brake spool 30 passes through brake spool return spring 70 at this time
It is pressed in driven plunger 20, holding is bonded with it.
As shown in Fig. 2, when engine throttled back, valve is driven under the action of valve spring on driven plunger 20
Row drives 30 uplink of brake spool, machine oil to flow back into outer support high-pressure oil duct 101 by driven plunger compartment 90, blocks up ball 44 in machine oil
It is pressed onto upper cover oilhole 421 under the action of flowing to be blocked, therefore machine oil is only capable of flowing back by brake valve core bore 41, be closed in valve
The starting stage closed, brake spool 30 not yet enter brake valve core bore 41, and machine oil reflux sectional area is entire brake valve core bore
41, as shown in figure 3, with the closing of valve, brake spool 30 enters brake valve core bore 41, and machine oil reflux area reduces, reflux
Resistance increases, and with the uplink of valve, and conical surface endless belt 31 enters brake valve core bore 41, and machine oil reflux area further subtracts
Small, reflux resistance further increases, and valve crash speed slows down.
As shown in Figure 1-Figure 3, hydraulic lash adjuster 60 is integrated in the lower section of driven plunger by patent of the present invention, passes through liquid
50 fuel feeding of clearance adjuster feeding plunger is pressed, realizes the adjust automatically of valve clearance.
Claims (5)
1. a kind of engine valve slow take a seat mechanism, including outer support (10), outer support high-pressure oil duct (101), driven plunger
(20), hydraulic lash adjuster feeding plunger (50), hydraulic lash adjuster assembly (60), interior bearing (80) and driven plunger compartment
(90), it is characterised in that：
It is total that brake spool (30), brake check valve are equipped between the driven plunger compartment (90) and outer support high-pressure oil duct (101)
At (40) and brake spool return spring (70)；
The brake spool (30) is equipped with structure conical surface endless belt (31) and return spring flange (32)；
The brake check valve assembly (40) is by unidirectional valve upper cover (42), unidirectional valve base (43), stifled ball (44) and sealing ring
(45) it forms, wherein being equipped with brake valve core bore (41) in the middle part of the brake check valve assembly (40), is set on unidirectional valve upper cover (42)
There is upper cover oilhole (421), unidirectional valve base (43) is equipped with annular oil groove (431), pedestal blocks up ball (432) and pedestal oilhole
(433)；
When valve opening, the machine oil in outer support high-pressure oil duct (101) is by brake valve core bore (41) and brake check valve assembly
(40) while entering driven plunger compartment (90)；When valve-closing, the machine oil in driven plunger compartment (90) only passes through brake valve core bore
(41) outer support high-pressure oil duct (101) is flowed back into.
2. a kind of slow mechanism of taking a seat of engine valve according to claim 1, it is characterised in that：The brake spool (30)
It is clearance fit with driven plunger compartment (90).
3. a kind of slow mechanism of taking a seat of engine valve according to claim 1, it is characterised in that：The driven plunger (20)
It is to couple cooperation with driven plunger compartment (90).
4. a kind of slow mechanism of taking a seat of engine valve according to claim 1, it is characterised in that：The brake valve core bore
(41) it is located at the center of brake check valve assembly (40).
5. a kind of slow mechanism of taking a seat of engine valve according to claim 1, it is characterised in that：The pedestal blocks up ball
(432) it is uniformly arranged on unidirectional valve base (43), quantity is identical as upper cover oilhole (421) quantity, and pedestal oilhole (433)
Setting is between each pedestal blocks up ball (432).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610762412.8A CN106368760B (en) | 2016-08-30 | 2016-08-30 | A kind of slow mechanism of taking a seat of engine valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610762412.8A CN106368760B (en) | 2016-08-30 | 2016-08-30 | A kind of slow mechanism of taking a seat of engine valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106368760A CN106368760A (en) | 2017-02-01 |
| CN106368760B true CN106368760B (en) | 2018-08-14 |
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ID=57901720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610762412.8A Active CN106368760B (en) | 2016-08-30 | 2016-08-30 | A kind of slow mechanism of taking a seat of engine valve |
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| Country | Link |
|---|---|
| CN (1) | CN106368760B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255096A (en) * | 2017-07-18 | 2017-10-17 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of civil aircraft variable restrictor ports valve |
| JP7004817B2 (en) * | 2017-11-10 | 2022-01-21 | ジェイコブス ビークル システムズ、インコーポレイテッド | Rash adjustment in lost motion engine system |
| CN114483243B (en) * | 2022-01-25 | 2022-08-16 | 吉林大学 | Cam-driven hydraulic variable valve mechanism based on electro-hydraulic control |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007014250A1 (en) * | 2007-03-24 | 2008-09-25 | Schaeffler Kg | Internal combustion engine with engine brake |
| CN101907000A (en) * | 2010-06-29 | 2010-12-08 | 绵阳富临精工机械有限公司 | Automatically adjusting hydraulic tappet of engine valve clearance |
| CN203114432U (en) * | 2013-01-04 | 2013-08-07 | 江苏公大动力技术有限公司 | Variable valve time control system |
| CN103939164B (en) * | 2014-04-25 | 2016-08-17 | 安徽江淮汽车股份有限公司 | A kind of engine valve clearance adjuster |
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- 2016-08-30 CN CN201610762412.8A patent/CN106368760B/en active Active
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| CN106368760A (en) | 2017-02-01 |
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