CN203335166U - Variable valve lift mechanism of automobile engine air distribution system - Google Patents
Variable valve lift mechanism of automobile engine air distribution system Download PDFInfo
- Publication number
- CN203335166U CN203335166U CN2013202992892U CN201320299289U CN203335166U CN 203335166 U CN203335166 U CN 203335166U CN 2013202992892 U CN2013202992892 U CN 2013202992892U CN 201320299289 U CN201320299289 U CN 201320299289U CN 203335166 U CN203335166 U CN 203335166U
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- Prior art keywords
- oil cylinder
- swing arm
- stationary axle
- valve lift
- distribution system
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Abstract
A variable valve lift mechanism of an automobile engine air distribution system is used for adjusting the air inflow of an engine. The variable valve lift mechanism of the automobile engine air distribution system comprises a cam shaft, an oil cylinder swinging arm assembly, a fixing shaft, a swinging block, a roller swinging arm assembly, a valve assembly and a hydraulic tappet. The cam shaft and the fixing shaft are respectively installed on a cylinder cover of the engine. The oil cylinder swinging arm assembly is matched with the cam shaft and is hinged to the fixing shaft. The swinging block is fixed to the lower end of the oil cylinder swinging arm assembly and is assembled with the roller swinging arm assembly. The two ends of the roller swinging arm assembly are assembled with the valve assembly and the hydraulic tappet respectively. The variable valve lift mechanism of the automobile engine air distribution system is compact in structure and capable of facilitating the arrangement of the engine on a finished automobile, being used in cooperation with the VVT, achieving the valve timing and valve lift variable technology, improving the dynamic performance of the engine and reducing the emission index of the engine.
Description
Technical field
The utility model relates to a kind of engine air distribution system, and especially a kind of motor car engine gas distribution system variable air valve lift range mechanism, belong to technical field of internal combustion engines.
Background technique
Exhaustion day by day along with the Global Oil resource, countries in the world are more and more stricter to the requirement of automobile energy consumption, discharge, promote to the full extent engine thermal efficiency, improve VE Vehicle Economy, to become current urgent task the service life that consumes, extends the Global Oil resource excessively of slowing down the energy.
The charging efficiency that improves motor is to improve the effective way of its thermal efficiency and power character, the VVT(Variable Valve Time that present engine has been brought into use) technology, to regulate the phase place of inlet and outlet door according to Under Different Work Condition of Engine, namely by regulating the switching moment of inlet and outlet door, control the inlet and outlet endurance, thereby reach the purpose of regulating the inlet and outlet amount.But the VVT technology can not change the degree of valve opening, namely valve lift, can not adapt to the operating mode that motor is complicated and changeable better, and the power performance of motor is not in full use.Although some full-sized car companies have adopted the VVL(lift range variable on its product) technology, because structure is more complicated, increased the height of motor, be unfavorable for the layout of motor on car load.
The model utility content
The purpose of this utility model is the drawback for prior art, providing a kind of is used in conjunction with and realizes that valve lift and start-up time are all variable with motor VVT, improve engine power performance, reduce the motor car engine gas distribution system variable air valve lift range mechanism of motor exhaust index.
Problem described in the utility model realizes with following technical proposals:
A kind of motor car engine gas distribution system variable air valve lift range mechanism, it comprises camshaft, oil cylinder swing arm unit, stationary axle, centering block, roller rocker arms assembly, valve assembly and hydraulic tappet, described camshaft, stationary axle are installed in engine cylinder and cover, described oil cylinder swing arm unit and camshaft coupling, and hinged with stationary axle, described centering block is fixed on oil cylinder swing arm unit lower end, and it and roller rocker arms assembly are equipped with, and described roller rocker arms assembly two ends are equipped with valve assembly and hydraulic tappet respectively.
Above-mentioned motor car engine gas distribution system variable air valve lift range mechanism, described oil cylinder swing arm unit comprises special-shaped oil cylinder, swing arm and Returnning spring, described special-shaped oil cylinder bottom surface contacts with the cam profile of camshaft, be provided with the stationary axle hinging hole on special-shaped cylinder block, the inner chamber of abnormity oil cylinder is the circular arc type seal oil chamber structure centered by the stationary axle hinging hole, is provided with the cylinder body oilhole be communicated with hinging hole on special-shaped oil cylinder sidewall.
Above-mentioned motor car engine gas distribution system variable air valve lift range mechanism, the piston of described special-shaped oil cylinder is the camber plunger, in the outboard end fixed installation swing arm of arc-shaped plunger piston.
Above-mentioned motor car engine gas distribution system variable air valve lift range mechanism, described swing arm is connected with Returnning spring one end, and the described Returnning spring the other end is fixed on engine cylinder and covers, at the lower end of swing arm fixed installation centering block.
Above-mentioned motor car engine gas distribution system variable air valve lift range mechanism, two-part before and after described centering block comprises, its front half part is the arc structure centered by the stationary axle axis, its latter half part is downward-sloping structure.
Above-mentioned motor car engine gas distribution system variable air valve lift range mechanism, described stationary axle is hollow shaft, its hollow lumen be arranged in the hydraulic control circuit that engine cylinder covers and be communicated with, be provided with annular oil groove on the stationary axle outer surface, described annular oil groove is communicated with hollow lumen by the stationary axle oilhole.
The utility model is arranged in engine cylinder and covers, it is communicated with the oil circulation system of engine cylinder cover by hydraulic control circuit, because cam shaft line position and cam profile are constant, therefore the downward displacement amount of oil cylinder swing arm unit by camshaft actuated is certain, when in the oil cylinder swing arm unit, swing arm and special-shaped oil cylinder bottom surface angle are a, by swing arm driving rocking arm roller, downward displacement is A, when swing arm and special-shaped oil cylinder bottom surface angle increase to b, by swing arm driving rocking arm roller, downward displacement is B(B > A), if swing arm and special-shaped oil cylinder bottom surface angle continuous variable, the downward displacement of rocking arm roller is continuous variable so, valve lift also just can realize changing continuously, in the utility model, swing arm and special-shaped oil cylinder bottom surface variable angle are under Engine ECU is controlled, switching by solenoid valve in hydraulic control circuit realizes, when solenoid valve is opened, in engine cylinder cover, lubricant oil flows in the stationary axle hollow lumen under pressure, through stationary axle oilhole, cylinder body oilhole, arrive in the seal oil chamber of special-shaped cylinder body, promote arc-shaped plunger piston and drive the swing arm campaign, until, after oil pressure and arc-shaped plunger piston resistance to motion balance, swing arm and special-shaped oil cylinder form the body structure that is rigidly connected that angle is certain value, when closed electromagnetic valve, abnormity cylinder body seal oil chamber inner engine oil is through cylinder body oilhole, stationary axle oilhole, stationary axle hollow lumen, another mouth by solenoid valve is let out crankcase, swing arm promotes arc-shaped plunger piston and returns under the elastic force effect of Returnning spring, until, after the Spring balanced of the interior oil pressure of special-shaped cylinder body circular arc Seal cage and Returnning spring, swing arm and special-shaped oil cylinder form the body structure that is rigidly connected that angle is another definite value, the bottom surface of the utility model special-shaped oil cylinder under the effect of Returnning spring elastic force remains and contacts with cam of camshaft profile, has avoided the transmission of camshaft to impact.In a word, the utility model compact structure, be conducive to the layout of motor on car load, and it coordinates VVT to use can realize port timing and the full variable technique of valve lift, has improved the power performance of motor, has reduced the exhaust index of motor.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is that the utility model covers the layout schematic diagram at engine cylinder;
Fig. 2 is the utility model structural representation;
Fig. 3 is oil cylinder swing arm unit and centering block structure schematic diagram;
Fig. 4 is the fixed axle structure schematic diagram;
Fig. 5 is A-A sectional structure chart in Fig. 4;
Fig. 6 is the schematic diagram of the utility model when oil cylinder swing arm unit angle is a;
Fig. 7 is stationary axle under Fig. 6 state, oil cylinder swing arm unit and centering block structure sketch;
Fig. 8 is Fig. 6 state lower shake-changing arm roller displacement amount schematic diagram;
Fig. 9 is the schematic diagram of the utility model when oil cylinder swing arm unit angle is b;
Figure 10 is stationary axle under Fig. 9 state, oil cylinder swing arm unit and centering block structure sketch;
Figure 11 is Fig. 9 state lower shake-changing arm roller displacement amount schematic diagram.
In figure, each list of reference numerals is: 1, engine cylinder cover, 2, variable air valve lift range mechanism, 2-1, camshaft, 2-2, the oil cylinder swing arm unit, 2-2-1, the abnormity oil cylinder, 2-2-2, seal oil chamber, 2-2-3, arc-shaped plunger piston, 2-2-4, the stationary axle hinging hole, 2-2-5, the cylinder body oilhole, 2-2-6, Returnning spring, 2-2-7, swing arm, 2-3, stationary axle, 2-3-1, the stationary axle oilhole, 2-3-2, annular oil groove, 2-3-3, hollow oil pocket, 2-4, centering block, 2-4-1, arc structure, 2-4-2, downward-sloping structure, 2-5, the roller rocker arms assembly, 2-6, valve assembly, 2-7, hydraulic tappet, 3, hydraulic control oil circuit, 3-1, solenoid valve.
Embodiment
Referring to Fig. 1, the utility model is arranged as the variable air valve lift range mechanism 2 of motor car engine gas distribution system, it is arranged on engine cylinder cover 1, and it is communicated with the oil circulation system of engine cylinder cover 1 by hydraulic control circuit 3, and solenoid valve 3-1 is set on hydraulic control oil circuit 3.
Referring to Fig. 2, the utility model comprises camshaft 2-1, oil cylinder swing arm unit 2-2, stationary axle 2-3, centering block 2-4, roller rocker arms assembly 2-5, valve assembly 2-6 and hydraulic tappet 2-7, described camshaft 2-1, stationary axle 2-3 are installed on engine cylinder cover 1, described oil cylinder swing arm unit 2-2 and camshaft 2-1 coupling, and hinged with stationary axle 2-3, described centering block 2-4 is fixed on oil cylinder swing arm unit 2-2 lower end, it and roller rocker arms assembly 2-5 are equipped with, and described roller rocker arms assembly 2-5 two ends are equipped with valve assembly 2-6 and hydraulic tappet 2-7 respectively.
Referring to Fig. 3, oil cylinder swing arm unit 2-2 of the present utility model comprises special-shaped oil cylinder 2-2-1, swing arm 2-2-7 and Returnning spring 2-2-6, described special-shaped oil cylinder 2-2-1 bottom surface contacts with the cam profile of camshaft 2-1, be provided with stationary axle hinging hole 2-2-4 on special-shaped oil cylinder 2-2-1 cylinder body, the inner chamber of abnormity oil cylinder is the circular arc type seal oil chamber 2-2-2 structure centered by stationary axle hinging hole 2-2-4, is provided with the cylinder body oilhole 2-2-5 be communicated with hinging hole 2-2-4 on special-shaped oil cylinder 2-2-1 sidewall; The piston of abnormity oil cylinder 2-2-1 is camber plunger 2-2-3, at the outboard end fixed installation swing arm 2-2-7 of arc-shaped plunger piston 2-2-3; Described swing arm 2-2-7 is connected with Returnning spring 2-2-6 mono-end, and the described Returnning spring 2-2-6 the other end is fixed on engine cylinder cover 1, at the lower end of swing arm 2-2-7 fixed installation centering block 2-4; Two-part before and after described centering block 2-4 comprises, its front half part is the arc structure 2-4-1 centered by the stationary axle axis, its latter half part is downward-sloping structure 2-4-2.
Referring to Fig. 4, Fig. 5, stationary axle 2-3 of the present utility model is hollow shaft, its hollow oil pocket 2-3-3 is communicated with the hydraulic control oil circuit 3 on being arranged in engine cylinder cover 1, be provided with annular oil groove 2-3-2 on the outer surface of stationary axle 2-3, described annular oil groove 2-3-2 is communicated with hollow lumen 2-3-3 by stationary axle oilhole 2-3-1.
Referring to Fig. 6～Figure 11, camshaft 2-1 axial location of the present utility model and cam profile are constant, therefore the downward displacement amount of oil cylinder swing arm unit 2-2 driven by camshaft 2-1 is certain, when in oil cylinder swing arm unit 2-2, swing arm 2-2-7 and special-shaped oil cylinder bottom surface angle are a, driving the downward displacement of rocking arm roller by swing arm 2-2-7 is A, when swing arm 2-2-7 and special-shaped oil cylinder 2-2-1 bottom surface angle increase to b, driving the downward displacement of rocking arm roller by swing arm 2-2-7 is B(B > A), if swing arm 2-2-7 and special-shaped oil cylinder 2-2-1 bottom surface angle continuous variable, the downward displacement of rocking arm roller is continuous variable so, valve lift also just can realize changing continuously.In the utility model, swing arm 2-2-7 and special-shaped oil cylinder 2-2-1 bottom surface variable angle are under Engine ECU is controlled, switching by solenoid valve 3-1 in hydraulic control oil circuit 3 realizes, when needs increase valve lift, solenoid valve 3-1 opens, in engine cylinder cover, lubricant oil flows in the hollow oil pocket 2-3-3 of stationary axle 2-3 under pressure, through stationary axle oilhole 2-3-1, cylinder body oilhole 2-2-5 arrives in the seal oil chamber 2-2-2 of special-shaped cylinder body, promote arc-shaped plunger piston 2-2-3 and drive swing arm 2-2-7 motion, until after oil pressure and arc-shaped plunger piston 2-2-3 resistance to motion balance, swing arm 2-2-7 and special-shaped oil cylinder 2-2-1 form the body structure that is rigidly connected that angle is certain value.This rigid connection body makes the bottom surface of special-shaped oil cylinder 2-2-1 remain and contact with camshaft 2-1 cam type surface under the effect of Returnning spring 2-2-6 elastic force, rotation along with camshaft 2-1, driving is fixed on rigid connection body lower end centering block 2-4 and swings, when the arc structure 2-4-1 of centering block 2-4 contacts with the rocking arm roller, centering block 2-4 is to the rocking arm roller application of force not, when the oblique line structure 2-4-2 of centering block 2-4 contacts with the rocking arm roller; the rocking arm roller is subject to downward thrust; thus drive valve assembly 2-6 to move up and down, realize the switching of valve.When needs reduce valve lift, solenoid valve 3-1 closes, the seal oil chamber 2-2-2 inner engine oil of abnormity cylinder body 2-2-1 is through cylinder body oilhole 2-2-5, stationary axle oilhole 2-3-1, the hollow oil pocket 2-3-3 of stationary axle, another mouth by solenoid valve 3-1 is let out engine crankcase, swing arm 2-2-7 promotes arc-shaped plunger piston 2-2-3 and returns under the elastic force effect of Returnning spring 2-2-6, until, after the Spring balanced of the interior oil pressure of special-shaped oil cylinder 2-2-1 seal oil chamber 2-2-2 and Returnning spring 2-2-6, swing arm 2-2-7 and special-shaped oil cylinder 2-2-1 form the body structure that is rigidly connected that angle is another definite value.Drive this body structure that is rigidly connected, centering block 2-4 and roller rocker arms assembly 2-5 by camshaft 2-1 again, drive valve assembly 2-6 and move up and down, realize the switching of valve.
Claims (6)
1. a motor car engine gas distribution system variable air valve lift range mechanism, it is characterized in that, it comprises camshaft (2-1), oil cylinder swing arm unit (2-2), stationary axle (2-3), centering block (2-4), roller rocker arms assembly (2-5), valve assembly (2-6) and hydraulic tappet (2-7), described camshaft (2-1), stationary axle (2-3) is installed on engine cylinder cover (1), described oil cylinder swing arm unit (2-2) and camshaft (2-1) coupling, and hinged with stationary axle (2-3), described centering block (2-4) is fixed on oil cylinder swing arm unit (2-2) lower end, it and roller rocker arms assembly (2-5) are equipped with, described roller rocker arms assembly (2-5) two ends are equipped with valve assembly (2-6) and hydraulic tappet (2-7) respectively.
2. a kind of motor car engine gas distribution system variable air valve lift range mechanism according to claim 1, it is characterized in that, described oil cylinder swing arm unit (2-2) comprises oil cylinder (2-2-1), swing arm (2-2-7) and Returnning spring (2-2-6), described oil cylinder (2-2-1) bottom surface contacts with the cam profile of camshaft (2-1), be provided with stationary axle hinging hole (2-2-4) on oil cylinder (2-2-1) cylinder body, the inner chamber of oil cylinder is circular arc type seal oil chamber (2-2-2) structure centered by stationary axle hinging hole (2-2-4), be provided with the cylinder body oilhole (2-2-5) be communicated with hinging hole (2-2-4) on oil cylinder (2-2-1) sidewall.
3. a kind of motor car engine gas distribution system variable air valve lift range mechanism according to claim 2, it is characterized in that, the piston of described oil cylinder (2-2-1) is camber plunger (2-2-3), in the outboard end fixed installation swing arm (2-2-7) of arc-shaped plunger piston (2-2-3).
4. a kind of motor car engine gas distribution system variable air valve lift range mechanism according to claim 3, it is characterized in that, described swing arm (2-2-7) is connected with Returnning spring (2-2-6) end, it is upper that described Returnning spring (2-2-6) the other end is fixed on engine cylinder cover (1), at the lower end of swing arm (2-2-7) fixed installation centering block (2-4).
5. a kind of motor car engine gas distribution system variable air valve lift range mechanism according to claim 4, it is characterized in that, two-part before and after described centering block (2-4) comprises, its front half part is the arc structure (2-4-1) centered by the stationary axle axis, and its latter half part is downward-sloping structure (2-4-2).
6. a kind of motor car engine gas distribution system variable air valve lift range mechanism according to claim 5, it is characterized in that, described stationary axle (2-3) is hollow shaft, its hollow oil pocket (2-3-3) is communicated with the hydraulic control oil circuit (3) on being arranged in engine cylinder cover (1), be provided with annular oil groove (2-3-2) on the outer surface of stationary axle (2-3), described annular oil groove (2-3-2) is communicated with hollow lumen (2-3-3) by stationary axle oilhole (2-3-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202992892U CN203335166U (en) | 2013-05-29 | 2013-05-29 | Variable valve lift mechanism of automobile engine air distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202992892U CN203335166U (en) | 2013-05-29 | 2013-05-29 | Variable valve lift mechanism of automobile engine air distribution system |
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| Publication Number | Publication Date |
|---|---|
| CN203335166U true CN203335166U (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202992892U Expired - Lifetime CN203335166U (en) | 2013-05-29 | 2013-05-29 | Variable valve lift mechanism of automobile engine air distribution system |
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| Country | Link |
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| CN (1) | CN203335166U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131854A (en) * | 2014-06-23 | 2014-11-05 | 贾开继 | Technique capable of continuously changing timing, phase and lift of valve of engine |
| CN105084256A (en) * | 2015-08-31 | 2015-11-25 | 山东建筑大学 | Control handle for hand hydraulic carrier |
-
2013
- 2013-05-29 CN CN2013202992892U patent/CN203335166U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131854A (en) * | 2014-06-23 | 2014-11-05 | 贾开继 | Technique capable of continuously changing timing, phase and lift of valve of engine |
| CN105084256A (en) * | 2015-08-31 | 2015-11-25 | 山东建筑大学 | Control handle for hand hydraulic carrier |
| CN105084256B (en) * | 2015-08-31 | 2017-03-29 | 山东建筑大学 | A kind of hand hydraulic carrier control crank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |
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| CX01 | Expiry of patent term |