CN101701538A - Mechanism capable of continuously changing valve phase for motor - Google Patents
Mechanism capable of continuously changing valve phase for motor Download PDFInfo
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- CN101701538A CN101701538A CN200910192101A CN200910192101A CN101701538A CN 101701538 A CN101701538 A CN 101701538A CN 200910192101 A CN200910192101 A CN 200910192101A CN 200910192101 A CN200910192101 A CN 200910192101A CN 101701538 A CN101701538 A CN 101701538A
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- motor
- mechanism capable
- continuously changing
- valve phase
- cam
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Abstract
A mechanism capable of continuously changing valve phase for a motor comprises a valve and a three-dimensional cam capable of changing valve lift range and start-stop moment, wherein the mechanism is provided with a swinging arm capable of swinging, a rack bar capable of rotating, a gear rack capable of reciprocating and an axial thrust bearing, the swinging arm is fixedly connected with the rack bar, the rack bar thereon is provided with gears engaged with the gear rack which drives the three-dimensional cam to axially move through the axial thrust bearing, the three-dimensional cam thereon is provided with a diving key connected with a driving wheel and driven by the driving wheel to rotate. The invention uses a mechanism which combines the swinging arm with the rack bar and the gear rack, is capable of controlling the three-dimensional cam in different molded line working sections according to the actual working conditions of the motor, thereby obtaining the preferable valve phase matched with the working conditions of the motor. As a hydraulic control system is not necessarily arranged, the structure is simplified, and synchronously, the axial displacement of the three-dimensional cam is produced by using a gear engagement manner, thus, the mechanism works more reliably.
Description
Technical field
The present invention relates to engine valve phase control field, relate to a kind of mechanism capable of continuously changing valve phase for motor especially.
Background technique
As everyone knows, port timing is very big to the performance impact of motor, and best valve-control is different along with the working conditions change of motor.The motion timing and the valve lift of conventional engines valve actuating mechanism are fixed, reach best though can guarantee the performance of motor in a certain operating mode such as design conditions, but then can not fully take into account other operating modes, this is obviously unfavorable concerning the frequent motor car engine of working conditions change.Under this background, people explore the changing air valve phase actuation techniques, and some implementations have been proposed, as the admission cam shaft valve-control control system (VTC) of German KSAT company, changeable air valve timing mechanism (VVT) of Japan Suzuki Co., Ltd. etc., the adjusting that the changing air valve phase technology that these companies adopted can only be carried out limited several grades of shelves at present changes, generally have only top gear and bottom gear two-stage to change, it is to finish by the combining form that adopts a top gear cam and a bottom gear cam.But, because the applying working condition of motor car engine is constantly to change, that is along with the variation of the rotating speed and the load of motor, its optimal valve phase place preferably can carry out infinitely changing continuously regulating, could guarantee that like this motor all has more excellent performance output in bigger operating conditions scope, obviously, above-mentioned changing air valve phase technology can't satisfy these requirements.In view of this, Italy Fiat company has developed a kind of threedimensional cam mechanism and has been installed on the FerrariV8 motor, it constitutes: a threedimensional cam that has the tapering gabarit, it contacts with the valve stem that the tilting cushion block is housed, make the different piece of cam drive valve stem by moving axially of 3-D out wheel shaft, with this air gate distribution phase place that changes motor to adapt to different operating modes.Yet, though the threedimensional cam scheme of Fiat company has solved the continuous adjustable variation of valve-control, but moving axially of its camshaft is to adopt the engine oil pressure of lubrication system to control, and must be equipped with a cover hydraulic control system for this reason, thereby makes the structure more complicated of this device.
Summary of the invention
The present invention is directed to the existing in prior technology deficiency, a kind of mechanism capable of continuously changing valve phase for motor is provided, its purpose is can realize that the engine valve phase place is adjustable continuously on the one hand, can effectively simplifies the driving structure of its camshaft on the other hand.
For achieving the above object, the technical solution used in the present invention is: a kind of mechanism capable of continuously changing valve phase for motor is provided, comprise valve, valve spring, ball and the threedimensional cam that can change valve lift and open and close the moment, the profile molded lines of the transverse section of this threedimensional cam is along the axial direction variation and corresponding with the different operating modes of motor glossily continuously of camshaft, described threedimensional cam can move axially, described valve is driven by this threedimensional cam, it is characterized in that being provided with the swing arm that to swing, a rotary ratch, the tooth bar that can move back and forth, an axial thrust bearing, a Returnning spring, a decorative pearl on top of an official cap and an adjustable lever, described swing arm and ratch are fastenedly connected, ratch is provided with gear and described tooth bar engagement fit, and tooth bar drives above-mentioned threedimensional cam by described axial thrust bearing and moves axially; Offer feather key on the threedimensional cam and driving wheel is got in touch, on the one hand threedimensional cam is driven wheel drive and rotates and force valve to produce switching motion by its molded lines, threedimensional cam is subjected to the control of tooth bar and axial thrust bearing and produces and move axially on the other hand, concrete situation is to drive the ratch rotation by stirring swing arm, and then drive tooth bar by ratch and move back and forth, tooth bar then drives threedimensional cam by axial thrust bearing and produces axial displacement, regulate the contact position of threedimensional cam and ball thus, drive the keying of valve at last by ball, that is the molded lines of its real work, above-mentioned Returnning spring can be controlled and change to threedimensional cam as required, the effect of the decorative pearl on top of an official cap and adjustable lever is to assist ratch and tooth bar that threedimensional cam is resetted.
The present invention adopts the mechanism of swing arm in conjunction with ratch and tooth bar, can control threedimensional cam according to the actual conditions of motor and be in different molded lines active sections, obtain the preferable valve-control that is complementary with engine operating condition thus, owing to do not need to be equipped with hydraulic control system, so structure is simplified, the axial displacement of adopting the mode of gear engagement to produce threedimensional cam simultaneously, therefore work is more reliable.
Description of drawings
Fig. 1 is the schematic layout pattern of a kind of mechanism capable of continuously changing valve phase for motor of the present invention;
Fig. 2 is the ratch of a kind of mechanism capable of continuously changing valve phase for motor shown in Figure 1 and the schematic representation of tooth bar engagement fit;
Fig. 3 is the molded lines schematic representation of the corresponding working conditions of different engines of a kind of mechanism capable of continuously changing valve phase for motor threedimensional cam shown in Figure 1.
Embodiment
With specific embodiment the present invention is further described below, referring to Fig. 1-3:
A kind of mechanism capable of continuously changing valve phase for motor, comprise valve 1, valve spring 2, ball 3 and the threedimensional cam 4 that can change valve lift and open and close the moment, the axis of described threedimensional cam 4 is O1, the profile molded lines of the transverse section of threedimensional cam 4 is along the direction variation and corresponding with the different operating modes of motor glossily continuously of axes O 1, and threedimensional cam 4 can rotate around its axes O 1 on the one hand and can move back and forth along its axes O 1 on the other hand; The keying of described valve 1 is by threedimensional cam 4, ball 3 and valve spring 2 controls, it is characterized in that being provided with the swing arm that to swing 5, a rotary ratch 6, the tooth bar that can move back and forth 7, an axial thrust bearing 8,9, one decorative pearls on top of an official cap 10 of a Returnning spring and adjustable lever 11; Described swing arm 5 is fastenedly connected with ratch 6, between swing arm 5 and support 12, reduction torsion spring 13 can be set, the effect of torsion spring 13 is that auxiliary swing arm 5 and ratch 6 reset, need to prove, frame 12 can be that the part of motor body also can be the member that an independent component or a category seemingly act on, ratch 6 rotating supports are on fixed support 12, ratch 6 is provided with gear 66 and described tooth bar 7 engagement fit, tooth bar 7 sliding bearings are on support 12, it drives above-mentioned threedimensional cam 4 indirectly by described axial thrust bearing 8, wherein axial thrust bearing 8 is arranged between tooth bar 7 and the threedimensional cam 4, it must be noted that tooth bar 7 also can directly contact and drive threedimensional cam 4; In addition, in order to prevent that the rotation around self axis from appearring in tooth bar 7 in movement process, can offer locking groove 77 thereon, be equipped with stop nail 777 simultaneously, described stop nail 777 be arranged on the support 12 and with locking groove 77 can slide relative, need to prove that stop nail 777 can directly put in the locking groove 77, also can allow this stop steel ball and locking groove come in contact by hold out against a stop steel ball in its termination, the same like this purpose that can play stop; Similarly threedimensional cam 4 also is bearing on the support 12, offering feather key 14 on it cooperates with driving wheel 15, wherein feather key 14 can be a spline, protruding key or slide rail etc., driving wheel 15 then can be driving sprocket wheel or actuation gear etc., threedimensional cam 4 is driven wheel 15 drivings and rotates via feather key 14 on the one hand, and open (closing by valve spring 2 of valve 1 finished) by its molded lines compressing ball 3 and then compressing valve 1, threedimensional cam 4 can produce along the axis of axes O 1 direction with respect to driving wheel 15 and move on the other hand, concrete situation is at first to stir swing arm 5 according to the actual conditions of motor, and then drive ratch 6 rotates, driving tooth bar 7 by ratch 6 by gear 66 again moves back and forth, 7 of tooth bars drive threedimensional cam 4 indirectly by axial thrust bearing 8 and produce axial displacement, can certainly directly drive threedimensional cam 4 by tooth bar 7 moves axially, regulate and control the contact position of threedimensional cam 4 and ball 3 thus, driving valve 1 by ball 3 at last opens, that is threedimensional cam 4 can change the molded lines of its real work as required, and the effect of above-mentioned valve spring 2 is to make valve 1 that valve 1 and valve seat sealing are closed; The swing of swing arm 5 can also can directly be driven when adopting motor driving and also can be passed through to drive indirectly behind the speed reducer again by artificial its swing of directly control by motor driving; Adjustable lever 11 affacts an end of Returnning spring 9 by sliding plug 17 in addition, the other end of Returnning spring 9 contacts with threedimensional cam 4, effect is to assist ratch 6 and tooth bar 7 that threedimensional cam 4 is resetted and eliminate play between them, wherein adjustable lever 11 be connected with support 12 by screw thread and with a locking nut 16 to its positioning and locking, adjustable lever 11 can and the 17 direct effects of sliding plug also can pass through the decorative pearl on top of an official cap 10 indirectly-actings between them;
Need to prove, the profile molded lines of the transverse section of threedimensional cam 4 is to change glossily continuously along the direction of axes O 1, and it is corresponding with the different operating modes of motor, what Fig. 3 provided is the section variation schematic representation of threedimensional cam 4, wherein A section cam profile correspondence is high engine speeds or high load working condition, B section cam profile correspondence be medium engine speed or middle load condition, what C section cam profile was then corresponding is low engine speed or running on the lower load.
Obviously, the present invention adopts the mechanism of swing arm 5 in conjunction with ratch 6 and tooth bar 7, can control threedimensional cam 4 according to the actual conditions of motor and be in different active sections, obtain the valve-control that is complementary with engine operating condition thus, owing to do not need to be equipped with hydraulic control system, so structure simplified, the axial displacement of adopting the mode of gear engagement to produce threedimensional cam 4 simultaneously, therefore work is more reliable.
Claims (10)
1. mechanism capable of continuously changing valve phase for motor, comprise valve, valve spring, ball and threedimensional cam, also have support and driving wheel in addition, the profile molded lines of the transverse section of described threedimensional cam is along the axial direction variation and corresponding with the different operating modes of motor glossily continuously of camshaft, threedimensional cam is opened by ball compressing valve, valve spring makes valve-closing, it is characterized in that being provided with the swing arm that to swing, a rotary ratch, the tooth bar that can move back and forth, described swing arm and ratch are fastenedly connected, described ratch is provided with gear and described tooth bar engagement fit, threedimensional cam is provided with feather key and cooperates with described driving wheel, on the one hand threedimensional cam is driven wheel drive and around the axis rotation of threedimensional cam, the actual molded lines of threedimensional cam participation work is controlled and changed to threedimensional cam thus by described rack drives and move back and forth along the axis of threedimensional cam on the other hand.
2. a kind of mechanism capable of continuously changing valve phase for motor as claimed in claim 1 is characterized in that being provided with an axial thrust bearing between described tooth bar and threedimensional cam, and tooth bar drives threedimensional cam indirectly by this axial thrust bearing.
3. a kind of mechanism capable of continuously changing valve phase for motor as claimed in claim 1 is characterized in that directly driving threedimensional cam at described tooth bar.
4. a kind of mechanism capable of continuously changing valve phase for motor as claimed in claim 2 is characterized in that being provided with Returnning spring, sliding plug, adjustable lever and locking nut, and described adjustable lever is connected with support and the nut positioning and locking that is locked with screw thread.
5. a kind of mechanism capable of continuously changing valve phase for motor as claimed in claim 4 is characterized in that being provided with a decorative pearl on top of an official cap between sliding plug and adjustable lever.
6. a kind of mechanism capable of continuously changing valve phase for motor as claimed in claim 3 is characterized in that being provided with Returnning spring, sliding plug, adjustable lever and locking nut, and described adjustable lever is connected with support and the nut positioning and locking that is locked with screw thread.
7. a kind of mechanism capable of continuously changing valve phase for motor as claimed in claim 6 is characterized in that being provided with a decorative pearl on top of an official cap between sliding plug and adjustable lever.
8. a kind of mechanism capable of continuously changing valve phase for motor as claimed in claim 1 or 2 is characterized in that being provided with reduction torsion spring between swing arm and support.
9. a kind of mechanism capable of continuously changing valve phase for motor as claimed in claim 2 is characterized in that offering locking groove on tooth bar, and is provided with the stop nail or the stop steel ball cooperates with this locking groove.
10. a kind of mechanism capable of continuously changing valve phase for motor as claimed in claim 3 is characterized in that offering locking groove on tooth bar, and is provided with the stop nail or the stop steel ball cooperates with this locking groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910192101A CN101701538A (en) | 2009-09-03 | 2009-09-03 | Mechanism capable of continuously changing valve phase for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910192101A CN101701538A (en) | 2009-09-03 | 2009-09-03 | Mechanism capable of continuously changing valve phase for motor |
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| Publication Number | Publication Date |
|---|---|
| CN101701538A true CN101701538A (en) | 2010-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910192101A Pending CN101701538A (en) | 2009-09-03 | 2009-09-03 | Mechanism capable of continuously changing valve phase for motor |
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| CN (1) | CN101701538A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886562A (en) * | 2010-06-30 | 2010-11-17 | 龚文资 | Variable valve timing and variable valve lift control system for automobile engine |
| CN102155271A (en) * | 2011-04-01 | 2011-08-17 | 王平 | Engine control device without throttle valve |
| CN102606244A (en) * | 2012-04-01 | 2012-07-25 | 江门市硕普科技开发有限公司 | Mechanical type continuously variable valve mechanism of engine |
| CN107120155A (en) * | 2017-06-02 | 2017-09-01 | 中国北方发动机研究所(天津) | Engine and its control method with piston built-in valve and overhead changeable air valve |
| CN110173320A (en) * | 2019-06-28 | 2019-08-27 | 广汽三菱汽车有限公司 | The valve lift apparatus that valve stroke and valve opening time can be changed simultaneously |
-
2009
- 2009-09-03 CN CN200910192101A patent/CN101701538A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886562A (en) * | 2010-06-30 | 2010-11-17 | 龚文资 | Variable valve timing and variable valve lift control system for automobile engine |
| CN102155271A (en) * | 2011-04-01 | 2011-08-17 | 王平 | Engine control device without throttle valve |
| CN102606244A (en) * | 2012-04-01 | 2012-07-25 | 江门市硕普科技开发有限公司 | Mechanical type continuously variable valve mechanism of engine |
| CN107120155A (en) * | 2017-06-02 | 2017-09-01 | 中国北方发动机研究所(天津) | Engine and its control method with piston built-in valve and overhead changeable air valve |
| CN107120155B (en) * | 2017-06-02 | 2019-03-22 | 中国北方发动机研究所(天津) | Engine and its control method with piston built-in valve and overhead changeable air valve |
| CN110173320A (en) * | 2019-06-28 | 2019-08-27 | 广汽三菱汽车有限公司 | The valve lift apparatus that valve stroke and valve opening time can be changed simultaneously |
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Open date: 20100505 |