CN104895632A - Roller rocking arm air valve mechanism with mechanically adjustable air valve gap - Google Patents
Roller rocking arm air valve mechanism with mechanically adjustable air valve gap Download PDFInfo
- Publication number
- CN104895632A CN104895632A CN201510180129.XA CN201510180129A CN104895632A CN 104895632 A CN104895632 A CN 104895632A CN 201510180129 A CN201510180129 A CN 201510180129A CN 104895632 A CN104895632 A CN 104895632A
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- Prior art keywords
- rocking arm
- clearance
- clearance adjuster
- adjuster
- air valve
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- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 35
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Abstract
The invention is to provide a roller rocking arm air valve mechanism with a mechanically adjustable air valve gap to solve problems of difficult cold start and inadaptability to engines with large inclined angle in the traditional roller rocking arm air valve mechanism with hydraulic adjustable air valve gap. The roller rocking arm air valve mechanism with the mechanically adjustable air valve gap comprises a rocking arm having a roller, a cam installed on a cam shaft, an air valve and a gap adjuster, wherein the rocking arm is installed in the middle part of the air valve mechanism, the air valve and the adjuster are respectively arranged on two ends of the rocking arm; the gap adjuster is a rigid cylindrical body and provided with an external thread; the gap adjuster is assembled on an engine cylinder cover via the thread; and the top surface of the gap adjuster is spherical and embedded into the bottom surface of the end part of the rocking arm, so the rocking arm can swing winding the top end of the gap adjuster with action of the cam.
Description
Technical field
The invention belongs to technical field of automobile engine, relate to the air exchange system of motor car engine, more particularly, the present invention relates to a kind of valve clearance can the roller rocker arms valve mechanism of mechanical adjustment.
Background technique
Rocking arm in roller rocker arms valve mechanism is rolling friction, and it has lower frictional work consumption relative to the cup-shaped formula structure of Direct driver, effectively can promote engine performance, reduces engine fuel consumption.In addition, because the support end points of roller rocker arms distribution device typically employed by hydraulic lash adjuster, the effective valve gap adjustment of energy, is conducive to the hot noise and vibration of distribution device.Based on above 2 points, the application of distribution device in motor car engine of the type increases year by year.
For diesel engine, because its combustion manner is compression ignite form, therefore more responsive to engine compression ratio.If use the roller rocker arms valve mechanism of band fluid pressure governor, after long-time shutdown, because hydraulic lash adjuster internal high pressure chamber machine oil can, at emptying under oppressive force, cause initial start stage regulator to feel like jelly, thus affect air inflow and cause compression ratio to reduce.If engine down time long enough, then easily cause engine start difficulty.
The motor that inclination angle is very large is arranged for some; use its fluid pressure governor internal high pressure chamber of roller rocker arms valve mechanism of hydraulic lash adjuster can draining after a shutdown; therefore face traditional hydraulic lash adjuster and there is insufficient rigidity after long-time startup, cause the problem such as difficulty in starting and abnormal sound.
Summary of the invention
The object of the invention is to propose a kind of valve clearance can the roller rocker arms valve mechanism of mechanical adjustment, to avoid traditional valve gap hydraulic pressure adjustment roll sub-rocking arm valve mechanism problem the problem includes: cold start-up difficult problem and the problem of arranging the motor that inclination angle is larger cannot be applicable to.
Valve clearance of the present invention the roller rocker arms valve mechanism of mechanical adjustment can comprise middle part and has the rocking arm of roller, the cam be installed on camshaft, is installed on valve and the clearance adjuster at rocking arm two ends respectively; Key is that described clearance adjuster is rigid columnar body, and its outside is provided with outside thread, and is installed on engine cylinder by screw-thread fit and covers; The end face of clearance adjuster is sphere, and is embedded in the bottom surface, end of rocking arm, swings under the effect of cam to enable rocking arm around the top of clearance adjuster.
Further, for preventing clearance adjuster from use loosening, described clearance adjuster is also rotary with lock nut, and bottom surface and the engine cylinder cover of described lock nut offset, thus clearance adjuster is fastening relative to engine cylinder cover.
Further, described clearance adjuster is provided with the oil leab communicated with engine cylinder cover oil duct, and described oil leab is provided with the oil outlet towards the surface of contact of clearance adjuster and rocking arm on the top of clearance adjuster.The lubricant oil of engine cylinder cover flow in the oil leab of clearance adjuster under pressure, and sprays to the surface of contact of clearance adjuster and rocking arm from oil outlet, thus reduces the frictional force between clearance adjuster and the surface of contact of rocking arm.
Further, for reducing the frictional force of the surface of contact of roller and cam, described oil leab is also provided with the oil outlet towards the surface of contact of roller and cam.
Further, described engine cylinder is covered with the mounting hole for assemblage gap regulator, there is gap between the bottom surface of described mounting hole and the bottom surface of clearance adjuster, regulates cavity to make to be formed between the bottom surface of clearance adjuster and the bottom of mounting hole.There is gap between the bottom surface of mounting hole and the bottom surface of clearance adjuster, the convenient height regulating clearance adjuster, thus adapt to the requirement of different valve clearancies.
Further, described engine cylinder cover oil duct is provided with opening at the sidewall of adjustment cavity, the bottom surface of described clearance adjuster is provided with the oil inlet hole communicated with described oil leab, thus engine cylinder cover oil duct is communicated with the oil leab of clearance adjuster by regulating cavity.By the oil leab regulating cavity to be communicated with engine cylinder cover oil duct and clearance adjuster, can without the need to considering whether oil leab oil inlet hole is aimed at engine cylinder cover oil duct, reduce the requirement to oil leab oil inlet hole position and craft precision, and facilitate the assembling of clearance adjuster.
Traditional hydraulic lash adjuster is designed to height-adjustable mechanical clearance regulator by the present invention, both the low frictional work advantage of roller rocker arms distribution device had been remained, diesel engine can be avoided again and arrange larger motor problems in inclination angle, the problem includes: difficulty in starting and the large problem of startup noise, thus improve the Applicable scope of roller rocker arms distribution device.
Accompanying drawing explanation
Fig. 1 is that valve clearance of the present invention can the structural representation of roller rocker arms valve mechanism of mechanical adjustment.
Reference character: 1, roller; 2, rocking arm; 3, cam; 4, valve; 5, clearance adjuster; 6, engine cylinder cover; 7, mounting hole; 8, cavity is regulated; 9, lock nut; 10, engine cylinder cover oil duct; 11, oil leab; 12, oil outlet.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect and working principle etc. of the specific embodiment of the present invention as the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part are described in further detail.
Embodiment 1:
As shown in the figure, the valve clearance of the present embodiment the roller rocker arms valve mechanism of mechanical adjustment can comprise middle part and has the rocking arm 2 of roller 1, the cam 3 be installed on camshaft, is installed on valve 4 and the clearance adjuster 5 at rocking arm 2 two ends respectively; The end face of clearance adjuster 5 is sphere, and is embedded in the bottom surface, end of rocking arm 2, can swing to make rocking arm 2 under the effect of cam 3 around the top of clearance adjuster 5.
Described clearance adjuster 5 is rigid columnar body, its outside is provided with outside thread, engine cylinder cover 6 is provided with the mounting hole 7 for assemblage gap regulator 5, described mounting hole 7 is provided with internal thread, clearance adjuster 5 is installed on mounting hole 7 place of engine cylinder cover 6 by screw-thread fit, and its top protrudes from engine cylinder cover 6; The periphery of clearance adjuster 5 is rotary with lock nut 9, and bottom surface and the engine cylinder cover 6 of described lock nut 9 offset, thus clearance adjuster 5 is fastening relative to engine cylinder cover 6.
There is gap between the bottom surface of mounting hole 7 and the bottom surface of clearance adjuster 5, regulate cavity 8 to make to be formed between the bottom surface of clearance adjuster 5 and the bottom of mounting hole 7.Engine cylinder cover oil duct 10 is provided with opening at the sidewall of adjustment cavity 8, clearance adjuster 5 inside is provided with oil leab 11, the bottom surface of described clearance adjuster 5 is provided with the oil inlet hole communicated with oil leab 11, thus engine cylinder cover oil duct 10 is communicated with the oil leab 11 of clearance adjuster 5 by regulating cavity 8.
Described oil leab 11 is provided with on the top of clearance adjuster 5 towards the surface of contact of clearance adjuster 5 and rocking arm 2 and towards the oil outlet 12 of roller 1 with the surface of contact of cam 3.The lubricant oil of engine cylinder cover 6 flow in the oil leab 11 of clearance adjuster 5 under pressure, and from oil outlet 12 spray to clearance adjuster 5 and rocking arm 2 surface of contact and towards the surface of contact of roller 1 with cam 3, thus reduce the frictional force of above-mentioned two friction pairs.
When assembling valve 4 mechanism, cam 3 is positioned at generating circle position, must leave rational valve 4 gap X between cam 3 and roller.In order to reach this object, clearance adjuster 5 is installed on engine cylinder cover 6 by the outside thread on self external diameter, can freely regulated object with the setting height(from bottom) Y realizing clearance adjuster 5, thus reaches the object regulating valve 4 gap X.When valve 4 gap X adjusts to the value of needs, then undertaken locked by the setting height(from bottom) Y of lock nut 9 pairs of clearance adjusters 5, prevent from changing in mechanism kinematic process.
Claims (7)
1. valve clearance can the roller rocker arms valve mechanism of mechanical adjustment, comprises middle part and has the rocking arm of roller, the cam be installed on camshaft, be installed on valve and the clearance adjuster at rocking arm two ends respectively; It is characterized in that described clearance adjuster is rigid columnar body, its outside is provided with outside thread, and is installed on engine cylinder by screw-thread fit and covers; The end face of clearance adjuster is sphere, and is embedded in the bottom surface, end of rocking arm, swings under the effect of cam to enable rocking arm around the top of clearance adjuster.
2. valve clearance according to claim 1 can the roller rocker arms valve mechanism of mechanical adjustment, and it is characterized in that described clearance adjuster is also rotary with lock nut, bottom surface and the engine cylinder cover of described lock nut offset.
3. valve clearance according to claim 1 and 2 can the roller rocker arms valve mechanism of mechanical adjustment, it is characterized in that described clearance adjuster is provided with the oil leab communicated with engine cylinder cover oil duct, described oil leab is provided with the oil outlet towards the surface of contact of clearance adjuster and rocking arm on the top of clearance adjuster.
4. valve clearance according to claim 3 can the roller rocker arms valve mechanism of mechanical adjustment, it is characterized in that described oil leab is also provided with towards the oil outlet of the surface of contact of roller and cam.
5. valve clearance according to claim 3 can the roller rocker arms valve mechanism of mechanical adjustment, it is characterized in that described engine cylinder is covered with the mounting hole for assemblage gap regulator, there is gap between the bottom surface of described mounting hole and the bottom surface of clearance adjuster, regulate cavity to make to be formed between the bottom surface of clearance adjuster and the bottom of mounting hole.
6. valve clearance according to claim 5 can the roller rocker arms valve mechanism of mechanical adjustment, it is characterized in that described engine cylinder cover oil duct is provided with opening at the sidewall of adjustment cavity, the bottom surface of described clearance adjuster is provided with the oil inlet hole communicated with described oil leab, thus engine cylinder cover oil duct is communicated with the oil leab of clearance adjuster by regulating cavity.
7. valve clearance according to claim 1 and 2 can the roller rocker arms valve mechanism of mechanical adjustment, it is characterized in that described engine cylinder is covered with the mounting hole for assemblage gap regulator, there is gap between the bottom surface of described mounting hole and the bottom surface of clearance adjuster, regulate cavity to make to be formed between the bottom surface of clearance adjuster and the bottom of mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510180129.XA CN104895632A (en) | 2015-04-16 | 2015-04-16 | Roller rocking arm air valve mechanism with mechanically adjustable air valve gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510180129.XA CN104895632A (en) | 2015-04-16 | 2015-04-16 | Roller rocking arm air valve mechanism with mechanically adjustable air valve gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104895632A true CN104895632A (en) | 2015-09-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510180129.XA Pending CN104895632A (en) | 2015-04-16 | 2015-04-16 | Roller rocking arm air valve mechanism with mechanically adjustable air valve gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104895632A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018014216A1 (en) * | 2016-07-19 | 2018-01-25 | 乐矣天 | Multifunctional intake/exhaust rocker arm |
| CN108952872A (en) * | 2017-05-19 | 2018-12-07 | 卡特彼勒公司 | Public rocker arm for hydraulic lash adjuster and non-hydraulic clearance adjuster |
| CN109736913A (en) * | 2018-12-27 | 2019-05-10 | 江苏三能动力总成有限公司 | VVH engine cam gap adjusting method |
| CN110857635A (en) * | 2018-08-24 | 2020-03-03 | 宝沃汽车（中国）有限公司 | Oil passage structure for gas distribution system and gas distribution system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5896112A (en) * | 1981-12-04 | 1983-06-08 | Fuji Heavy Ind Ltd | Valve-gap adjusting method for internal-combustion engine |
| EP0032284B1 (en) * | 1980-01-12 | 1984-08-29 | Gkn Technology Limited | Valve clearance adjuster |
| US4981117A (en) * | 1987-12-19 | 1991-01-01 | Gkn Technology Limited | Automatic clearance adjuster |
| JPH0518214A (en) * | 1991-07-09 | 1993-01-26 | Fuji Oozx Kk | Mechanical type lash adjuster |
| CN1422359A (en) * | 2000-02-02 | 2003-06-04 | 米克基奇尼专业产品有限公司 | Automatic valve clearance adjuster |
| WO2009093682A1 (en) * | 2008-01-23 | 2009-07-30 | Ntn Corporation | Arm type valve gear device |
| US20100071648A1 (en) * | 2007-04-18 | 2010-03-25 | Katsuhisa Yamaguchi | Lash adjuster |
-
2015
- 2015-04-16 CN CN201510180129.XA patent/CN104895632A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0032284B1 (en) * | 1980-01-12 | 1984-08-29 | Gkn Technology Limited | Valve clearance adjuster |
| JPS5896112A (en) * | 1981-12-04 | 1983-06-08 | Fuji Heavy Ind Ltd | Valve-gap adjusting method for internal-combustion engine |
| US4981117A (en) * | 1987-12-19 | 1991-01-01 | Gkn Technology Limited | Automatic clearance adjuster |
| JPH0518214A (en) * | 1991-07-09 | 1993-01-26 | Fuji Oozx Kk | Mechanical type lash adjuster |
| CN1422359A (en) * | 2000-02-02 | 2003-06-04 | 米克基奇尼专业产品有限公司 | Automatic valve clearance adjuster |
| US20100071648A1 (en) * | 2007-04-18 | 2010-03-25 | Katsuhisa Yamaguchi | Lash adjuster |
| WO2009093682A1 (en) * | 2008-01-23 | 2009-07-30 | Ntn Corporation | Arm type valve gear device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018014216A1 (en) * | 2016-07-19 | 2018-01-25 | 乐矣天 | Multifunctional intake/exhaust rocker arm |
| CN108952872A (en) * | 2017-05-19 | 2018-12-07 | 卡特彼勒公司 | Public rocker arm for hydraulic lash adjuster and non-hydraulic clearance adjuster |
| CN110857635A (en) * | 2018-08-24 | 2020-03-03 | 宝沃汽车（中国）有限公司 | Oil passage structure for gas distribution system and gas distribution system |
| CN110857635B (en) * | 2018-08-24 | 2021-02-26 | 宝沃汽车（中国）有限公司 | Oil passage structure for gas distribution system and gas distribution system |
| CN109736913A (en) * | 2018-12-27 | 2019-05-10 | 江苏三能动力总成有限公司 | VVH engine cam gap adjusting method |
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Application publication date: 20150909 |