CN101550853B - Engine air valve continuously variable driving mechanism - Google Patents
Engine air valve continuously variable driving mechanism Download PDFInfo
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- CN101550853B CN101550853B CN2009100509097A CN200910050909A CN101550853B CN 101550853 B CN101550853 B CN 101550853B CN 2009100509097 A CN2009100509097 A CN 2009100509097A CN 200910050909 A CN200910050909 A CN 200910050909A CN 101550853 B CN101550853 B CN 101550853B
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- air valve
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Abstract
The invention discloses an engine air valve continuously variable driving mechanism, which comprises an air valve top and a camshaft with a cam; also comprises the following components: a control shaft mounted in parallel with the camshaft; a sun gear fixed on the control shaft; an output cam mounted on the control shaft in a rotatable way, while connected with the air valve top in an operatable way; a rocker arm mounted on the control shaft in a rotatable way; a roller mounted on the rocker arm in a rotatable way, while contacting the cam on the camshaft; a planetary gear mounted on the rocker arm in a rotatable way, while geared with the sun gear; and a crank fixed with the planetary gear, while contacting the output cam. Adopting the air valve driving mechanism in the invention can cancel engine throttle, thereby reduce pumping loss and fuel consumption, and optimize the torque output under all working conditions. The invention achieves the advantages of simple structure, small weight and size of components, large control range and convenient regulation; and has less change to the engine cylinder cover.
Description
Technical field
The present invention relates to a kind of driving mechanism that is used to control the engine valve opening and closing.
Background technique
The adjustment parameter of motor inlet and outlet door mainly contains three: valve opening phase place, valve opening duration and valve lift.These three parameters have significant effects to power character, oil consumption and the discharging of motor.On conventional engines, three special parameters are in operation and can not change, and in the engine operation of reality, along with the change of engine speed and load, are different to the optimal selection of special parameter.At present variable cam phase place mechanism has obtained using widely, and also there are corresponding product in domestic Shanghai Automobile Factory, producer such as lucky.The product of valve lift and duration continuous variable then seldom, what have typical case representative is the valvetronic mechanism of Bayerische Motorne Werke Aktiengeellschaft.
Use the continuously variable valve lift control mechanism to add the variable cam shaft phase control mechanism, just constituted full variable valve system.Realize infinitely regulating lift, duration and the timing of valve, the inlet and outlet door is worked in best overlapping angle scope, make the aeration quantity of cylinder remain on the optimum state.So just can be not adjusting by the closure amount of carrying out, realize the non-air throttle load control of motor, thereby reduce pumping loss greatly, obtain tangible oil-saving effect, can also in full speed range, optimize Maximum Torque, take into account the output of low-speed big characteristic and high speed high power, thereby improved the petrol engine dynamic property energy.
In the existing BMW valvetronic mechanism, between camshaft and valve, increased intermediate bar, and on cylinder cap, increased eccentric shaft, on eccentric shaft, designed eccentric shaft gear, return spring makes the trundle of intermediate bar remain with eccentric shaft gear and contacts, big roller remains with intake cam and contacts, and the motion of intermediate bar is controlled jointly by camshaft and eccentric shaft like this.Camshaft drives rocking arm by the camber line on the intermediate bar, and then the control valve motion.When the eccentric shaft phase invariant, around the rotation of some centers, the intermediate bar camber line is had an effect is a certain section zone of camber line to intermediate bar under the driving of admission cam shaft.After actuating motor rotated to an angle by turbine and worm mechanism driving eccentric shaft, the position of intermediate bar rotating center will change, thereby has changed the zone that the intermediate bar camber line is had an effect, and then has changed valve lift.
At present there are problems such as weight is big, size is big, rotary inertia is big, machining accuracy height in valve opening duration-lift continuous changeable valve actuating mechanism.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of miniaturization, variable valve actuation that driving power is little, can realize the adjustable continuously of valve opening duration and lift size, thereby plays the effect of air inflow in the dynamic adjustments cylinder.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of engine air valve continuously variable driving mechanism, comprise valve top and camshaft with cam, and also comprise with lower member: Control Shaft, with the parallel installation of described camshaft; Sun gear is fixedly mounted on the Control Shaft; Output cam is installed in rotation on the Control Shaft, and can be operatively connected with described valve top; Rocking arm is installed in rotation on the Control Shaft; Roller is installed in rotation on the rocking arm, and contacts with cam on the camshaft; Planetary pinion is installed in rotation on the rocking arm, and is meshed with described sun gear; Curved boom is fixedlyed connected with planetary pinion, and contacts with described output cam.
Preferably, comprise that also a return spring is connected with described output cam.
Further, described rocking arm is the U-shaped member, comprises two side arms, and the end of two side arms is enclosed within on the Control Shaft, also comprises a pivot pin, and the two supports of pivot pin is on described two side arms, and described roller and planetary pinion are installed on this pivot pin.
Further, sun gear on the described Control Shaft and output cam are also between two side arms of described rocking arm.
Preferably, the surface of described output cam directly contacts with the valve top.
Preferably, also comprise a swing arm, the middle part of swing arm is rotatably mounted a roller bearing, and the surface of described output cam contacts with this roller bearing, and an end of swing arm is connected with a hydraulic lash adjuster, and the other end of swing arm is connected with the valve top.
The invention has the beneficial effects as follows, the valve actuating mechanism of a kind of valve opening duration and lift continuous changeable has been proposed, adopt valve actuating mechanism of the present invention after, can cancel engine air throttle, thereby reduce pumping loss and oil consumption, optimize the moment of torsion output under each operating mode.Mechanism of the present invention is simple, the element weight size is little, and control range is big, and is easy to adjust, and less to the change of former engine cylinder cover.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is first kind of embodiment's of an engine air valve continuously variable driving mechanism of the present invention plan view.
Fig. 2 is first kind of embodiment's of the present invention a stereogram.
Fig. 3 is the attainable a kind of valve lift diagram of the present invention.
Fig. 4, Fig. 5 are the operating principle schematic representation of engine air valve continuously variable driving mechanism of the present invention.
Fig. 6 be the present invention a kind of on multivalve engine the stereogram of Application Example.
Fig. 7 is that the present invention is in the laterostigmatal practical embodiment of roller swing arm.
Among the figure: 1, camshaft 2, rocking arm 3, sun gear 4, Control Shaft 5, return spring 6, roller 7, pivot pin 8, curved boom 9, output cam 10, valve top 11, valve spring 12, valve 13, hydraulic lash adjuster 14, roller bearing 15, swing arm 16, planetary pinion 21, side arm
Embodiment
As shown in Figure 1 and Figure 2, in first kind of embodiment of the present invention, camshaft 1 is positioned at the top of valve 12, and camshaft 1 can be provided with a Control Shaft 4 by the motor driven rotary below camshaft 1, Control Shaft 4 and camshaft 1 parallel installation.Fixed installation one sun gear 3 on the Control Shaft 4, sun gear 3 can be driven by Control Shaft 4 and rotate; One output cam 9 also is installed on the Control Shaft 4, and output cam 9 can be around the rotational of Control Shaft 4, and the lower surface of output cam 9 contacts with valve top 10.Valve top 10 can be machinery or the hydraulic tappet that is connected with valve 12, when valve top 10 moves up and down under the drive of output cam 9, can drive valve 12 and close or open, and valve spring 11 is used to make valve 12 to reset.
One rocking arm 2 also is installed on Control Shaft 4, and rocking arm 2 is the U-shaped member, and the end kink of its two side arms 21 can rotate around Control Shaft 4 on Control Shaft 4, and sun gear 3 on the Control Shaft and output cam 9 are also between these two side arms 21.The pivot pin 7 of also ining succession between two side arms 21, the two ends of pivot pin 7 are bearing in respectively on two side arms 21.A rotary roller 6 and a planetary pinion 16 are installed on pivot pin 7, and wherein roller 6 contacts with cam on the camshaft 1; Planetary pinion 16 is meshed with sun gear 3.Curved boom 8 with smooth surface curve is fixedlyed connected with planetary pinion 16, can together rotate around pivot pin 7 with planetary pinion 16, and the smooth surface of curved boom 8 contacts with output cam 9.
When camshaft 1 rotates, roller 6 is moved up and down, driving rocking arm 2, planetary pinion 16 simultaneously is that the center of circle swings up and down with Control Shaft 4, the curved boom 8 that is connected with planetary pinion 16 can drive output cam 9 rotations again, opens or closes thereby drive valve 12.The return spring 5 that is connected with output cam 9 can provide restoring force upwards for output cam 9, rocking arm 2.
Rotate with one heart by rotating Control Shaft 4 and driving sun gear 3, can adjust the engaging position of planetary pinion 16 and sun gear 3, thereby change the movement locus of the curved boom 8 that is connected with planetary pinion 16, be delivered on the valve 12 by output cam 9, valve top 10 again, thereby change valve lift.Corresponding to each position (or corner of Control Shaft) of sun gear, planetary movement locus is fixed, and valve lift and valve duration are also fixed.Regulate the corner of Control Shaft 4 continuously, can continuously change valve lift, as shown in Figure 3, the valve opening duration also increases along with the increase of valve lift.Fig. 4 is illustrated under a certain specific Control Shaft corner, output cam turns over a β angle, make valve produce a high lift, valve becomes opening state b by closed condition a, α wherein and α ' expression are basic point with the center of circle of Control Shaft 4, angle between the center of circle of the planetary center of circle and camshaft 1, α be valve in off position, α ' is that valve is in opening state.Fig. 5 then is illustrated under another specific Control Shaft corner, and output cam turns over a β angle equally, but only makes valve produce a low lift, and valve becomes opening state d by closed condition c.
Fig. 6 is the embodiment that the present invention uses on multivalve engine, two planetary pinions and two curved booms 8 are installed on bearing pin 7, correspondingly, two sun gears and two output cams 9 are installed on Control Shaft 4, so just can be controlled the switch of two valves simultaneously.
In the above-described embodiments, output cam directly contacts with the valve top, and the movement locus that output cam 9 is exported directly produces moving up and down of valve.
The present invention can realize valve opening duration and lift size by predefined Changing Pattern 0 and maximum value between adjustable continuously.Control Shaft can be driven by a drive unit, and this drive unit comprises the rotary angle transmitter of measuring angle of swing and the final controlling element of Spin Control axle, and final controlling element can be a direct current generator, also can be that hydraulic buttery valve rotates by hydraulic pressure.The present invention is simple in structure, and element is less, can reduce cost of production, and frictional loss of the present invention is less, can change valve opening duration and valve lift simultaneously, has improved the fuel economy and the power performance of motor.
Claims (5)
1. engine air valve continuously variable driving mechanism comprises valve top (10) and has the camshaft (1) of cam, it is characterized in that also comprising with lower member:
Control Shaft (4) is with the parallel installation of described camshaft (1);
Sun gear (3) is fixedly mounted on the Control Shaft (4);
Output cam (9) is installed in rotation on the Control Shaft (4), and can be operatively connected with described valve top (10);
Rocking arm (2) is installed in rotation on the Control Shaft (4);
Roller (6) is installed in rotation on the rocking arm (2), and contacts with cam on the camshaft (1);
Planetary pinion (16) is installed in rotation on the rocking arm (2), and is meshed with described sun gear (3);
Curved boom (8) is fixedlyed connected with planetary pinion (16), and contacts with described output cam (9):
Described rocking arm (2) is the U-shaped member, comprise two side arms (21), the end of two side arms (21) is enclosed within on the Control Shaft (4), also comprise a pivot pin (7), the two supports of pivot pin (7) is on described two side arms (21), and described roller (6) and planetary pinion (16) are installed on this pivot pin (7).
2. engine air valve continuously variable driving mechanism according to claim 1 is characterized in that: comprise that also a return spring (5) is connected with described output cam (9).
3. engine air valve continuously variable driving mechanism according to claim 1 is characterized in that: sun gear (3) on the described Control Shaft (4) and output cam (9) also are positioned between two side arms (21) of described rocking arm.
4. engine air valve continuously variable driving mechanism according to claim 1 is characterized in that: the surface of described output cam (9) directly contacts with valve top (10).
5. engine air valve continuously variable driving mechanism according to claim 1, it is characterized in that: also comprise a swing arm (15), the middle part of swing arm (15) is rotatably mounted a roller bearing (14), the surface of described output cam (9) contacts with this roller bearing (14), one end of swing arm (15) is connected with a hydraulic lash adjuster (13), and the other end of swing arm (15) is connected with the valve top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100509097A CN101550853B (en) | 2009-05-08 | 2009-05-08 | Engine air valve continuously variable driving mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100509097A CN101550853B (en) | 2009-05-08 | 2009-05-08 | Engine air valve continuously variable driving mechanism |
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| Publication Number | Publication Date |
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| CN101550853A CN101550853A (en) | 2009-10-07 |
| CN101550853B true CN101550853B (en) | 2011-04-06 |
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| CN2009100509097A Active CN101550853B (en) | 2009-05-08 | 2009-05-08 | Engine air valve continuously variable driving mechanism |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925035B (en) * | 2013-01-15 | 2016-06-08 | 长城汽车股份有限公司 | A kind of swing arm regulates frame |
| CN103925100B (en) * | 2013-01-15 | 2016-12-28 | 长城汽车股份有限公司 | Engine cylinder cap assembly |
| CN103925036B (en) * | 2013-01-15 | 2017-02-08 | 长城汽车股份有限公司 | Variable valve lift driving device |
| CN105507979A (en) * | 2015-12-17 | 2016-04-20 | 广州汽车集团股份有限公司 | Continuous variable valve lift system and automobile |
| DE102016220397A1 (en) * | 2016-10-18 | 2017-08-10 | Schaeffler Technologies AG & Co. KG | Intermediate lever of a variable valve train |
| DE102016220396A1 (en) * | 2016-10-18 | 2017-08-10 | Schaeffler Technologies AG & Co. KG | Intermediate lever of a variable valve train |
| CN110645063A (en) * | 2019-09-24 | 2020-01-03 | 深圳臻宇新能源动力科技有限公司 | Valve lift device and vehicle with same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1143118A2 (en) * | 2000-04-07 | 2001-10-10 | Bayerische Motoren Werke Aktiengesellschaft | Device for varying the valve lift in an engine cylinder head |
| CN1471609A (en) * | 2000-10-25 | 2004-01-28 | ����-л�������Ϲ�˾ | Variable valve distributor for load-controlling a spark-ignited internal combustion engine |
| EP1426570A2 (en) * | 2000-06-30 | 2004-06-09 | Delphi Technologies, Inc. | Low friction variable valve actuation device |
| CN1533468A (en) * | 2001-07-17 | 2004-09-29 | ̩ɭ��³�������ɷݹ�˾ | Variable valve-stroke controller |
| EP1748160A1 (en) * | 2005-07-28 | 2007-01-31 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Variable valve driving gear for internal combustion engines |
| CN1916374A (en) * | 2005-08-15 | 2007-02-21 | 本田技研工业株式会社 | Lift-variable valve-operating system for internal combustionengine |
-
2009
- 2009-05-08 CN CN2009100509097A patent/CN101550853B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1143118A2 (en) * | 2000-04-07 | 2001-10-10 | Bayerische Motoren Werke Aktiengesellschaft | Device for varying the valve lift in an engine cylinder head |
| EP1426570A2 (en) * | 2000-06-30 | 2004-06-09 | Delphi Technologies, Inc. | Low friction variable valve actuation device |
| CN1471609A (en) * | 2000-10-25 | 2004-01-28 | ����-л�������Ϲ�˾ | Variable valve distributor for load-controlling a spark-ignited internal combustion engine |
| CN1533468A (en) * | 2001-07-17 | 2004-09-29 | ̩ɭ��³�������ɷݹ�˾ | Variable valve-stroke controller |
| EP1748160A1 (en) * | 2005-07-28 | 2007-01-31 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Variable valve driving gear for internal combustion engines |
| CN1916374A (en) * | 2005-08-15 | 2007-02-21 | 本田技研工业株式会社 | Lift-variable valve-operating system for internal combustionengine |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2004-138058A 2004.05.13 |
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| CN101550853A (en) | 2009-10-07 |
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