CN103939166A - Continuous variable valve timing control device - Google Patents
Continuous variable valve timing control device Download PDFInfo
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- CN103939166A CN103939166A CN201410209055.3A CN201410209055A CN103939166A CN 103939166 A CN103939166 A CN 103939166A CN 201410209055 A CN201410209055 A CN 201410209055A CN 103939166 A CN103939166 A CN 103939166A
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- transmitted chains
- stretcher
- drive link
- continuous variable
- control piston
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Abstract
The invention discloses a continuous variable valve timing control device which is based on a chain transmission system composed of a crankshaft, an exhaust cam shaft gear, an air inlet cam shaft gear and a transmission chain. The continuous variable valve timing control device comprises three transmission chain tensioners. Each transmission chain tensioner is connected with a transmission chain tensioner controller through a connecting oil pipe. A first transmission chain tensioner is arranged between the crankshaft and the exhaust cam shaft gear. A second transmission chain tensioner is arranged between the exhaust cam shaft gear and the air inlet cam shaft gear. A third transmission chain tensioner is arranged between the crankshaft and the air inlet cam shaft gear. According to the continuous variable valve timing control device, continuous variable control over air intake-exhaust valve timing advancing or delaying can be achieved, and variable control over an air intake valve and an exhaust valve is independent. The control device and an air valve transmission mechanism are relatively independent, and even under the situation that the control device loses efficacy, normal operation of the transmission mechanism cannot be affected. The continuous variable valve timing control device is low in maintaining cost, small in maintaining difficulty and low in control difficulty.
Description
Technical field
The present invention relates to car combustion engine field, particularly relate to the arrangement for controlling timing of the inlet and outlet door in the middle of the entering of internal-combustion engine, heat-extraction system.
Background technique
For traditional internal-combustion engine, the timing of valve is by the transmission mechanism control between convex line and camshaft and bent axle, and after cam manufacture completes, its timing is also just determined, can not be changed in the course of the work.But internal-combustion engine, especially Vehicular internal combustion engine, its working conditions change scope is very wide, and under different speed conditions, the flow characteristic of gas is widely different.The fixing valve opening moment is very unfavorable for utilizing air-flow inertia etc., in the time of design camshaft and driving mechanism, only has the handling characteristics according to internal-combustion engine, carry out a compromise selection in conjunction with its condition range, therefore final result is to optimize the internal combustion engine performance in whole condition range comprehensively.Advocating energetically under the background of energy-saving and emission-reduction, if can control flexibly the timing of valve, will be until positive role for the combination property of General Promotion internal-combustion engine.
Once intake and exhaust cam machines, its molded line is to be difficult to change in the middle of working procedure, therefore in the middle of existing numerous valve timing mechanism invention designs, all camshaft drive wheel is improved.In the middle of the process of improving drive wheel, unavoidably can make the structure of drive wheel become complicated, and can increase the quality of drive wheel.And the rotating speed of drive wheel is engine speed 1/2, its rotating speed is higher, in variable working condition because inertia will increase the dynamic load of transmission system.Therefore, if increase the further increase that the quality of drive wheel must cause transmission to load, very unfavorable for the dynamic response that improves motor.
In order to reach the object that changes valve timing, do not increase the quality of transmission system simultaneously yet, the present invention has redesigned a kind of CVTC.
Summary of the invention
Given this, the object of the invention is to provide a kind of continuous variable valve arrangement for controlling timing of realizing valve timing in the case of not increasing the quality of transmission system.
For solving above technical problem, technological scheme provided by the invention is, a kind of continuous variable valve arrangement for controlling timing is provided, the chain drive system of this control gear based on bent axle, exhaust cam shaftgear, intake cam shaftgear and Transmitted chains composition, comprise three Transmitted chains stretchers, each Transmitted chains stretcher connects a Transmitted chains stretcher controller by connected pipes; The first Transmitted chains stretcher is arranged between bent axle and exhaust cam shaftgear, and the second Transmitted chains stretcher is arranged between exhaust cam shaftgear and intake cam shaftgear, and the 3rd Transmitted chains stretcher is arranged between bent axle and intake cam shaftgear.
Further, described Transmitted chains stretcher comprises an Idle wheel, and Idle wheel is assemblied in one end of drive link, and the other end of drive link is connected with tensioning piston; Drive link is arranged in drive link slide, is provided with tension spring positioning boss on drive link, between tension spring positioning boss and drive link slide, tension spring is installed; Tensioning Piston assembling is in hydraulic pressure cavity, and hydraulic pressure cavity is fixedly mounted on drive link slide, drive link slide be fixed on engine body; In described hydraulic pressure cavity, be also provided with oil-feed interface, this oil-feed interface is connected with connected pipes.
Further, described Transmitted chains stretcher controller comprises a controller shell and solenoid valve, is equipped with a control piston on controller shell; One end of control piston is positioned at controller shell, and the other end of control piston is connected with solenoid valve; Control piston return spring is installed between control piston and solenoid valve; On controller shell, be also provided with two each and every one external pressure holes, two external pressure holes lay respectively at outside two stroke ends of control piston; On controller shell, be also provided with high pressure oil import, return opening and oil out port, oil out port is connected with connected pipes.
Preferably, described return spring and control piston coaxially assemble.
Preferably, described solenoid valve is arranged on controller shell.
Compared with prior art, a technological scheme tool in technique scheme has the following advantages:
1, the present invention can realize the timing of inlet and outlet door in advance or the continuous variable control of postponing, and the variable control of intake valve and exhaust valve is separate.
2, control gear of the present invention and valve actuating gear are relatively independent, even if situation about losing efficacy at control gear can not affect the normal operation of driving mechanism itself yet, also can not affect the groundwork of motor.
3, control gear of the present invention and valve actuating gear are relatively independent, are that control gear damages or transmission system damage can not produce and influence each other, and have reduced maintenance cost and maintenance difficulty.
4, the change of the driving mechanism to valve itself is less, increases hardly the weight of traditional valve actuating gear.
5, control gear itself can, with valve actuating gear high speed operation, not reduce the gross weight of movement parts, is conducive to improve the dynamic response characteristic of transmission system, has reduced the requirement to control system itself.
6, control gear itself all can use spare part in common use, and development difficulty is less, and development cost is relatively low.
7, directly actuated component are solenoid valve, and solenoid valve is position model, control difficulty little.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram of a preferred embodiment of the present invention.
Fig. 2 is Transmitted chains stretcher structural representation in a preferred embodiment of the present invention.
Fig. 3 is Transmitted chains stretcher controller architecture schematic diagram in a preferred embodiment of the present invention.
Brief description of the drawings: 1 bent axle, 2 exhaust cam shaftgears, 3 intake cam shaftgears, 4 Transmitted chainss, 5a the first Transmitted chains stretcher, 6a the first connected pipes, 7a the first Transmitted chains stretcher controller, 5b the second Transmitted chains stretcher, 6b the second connected pipes, 7b the second Transmitted chains stretcher controller, 5c the 3rd Transmitted chains stretcher, 6c the 3rd connected pipes, 7c the 3rd Transmitted chains stretcher controller, 51 tension spring positioning boss, 52 tension springs, 53 drive links, 54 oil-feed interfaces, 55 hydraulic pressure cavity, 56 tensioning pistons, 57 drive link slides, 58 Idle wheels, 71 control pistons, 72 control piston return springs, 73 solenoid valves, 74 controller shells, 75 oil out port, a external pressure hole, the import of b high pressure oil, c return opening.
Embodiment
Describe below in conjunction with accompanying drawing and a specific embodiment.
Referring to Fig. 1 to Fig. 3.The described continuous variable valve arrangement for controlling timing of the present embodiment, the chain drive system that this control gear forms based on bent axle 1, exhaust cam shaftgear 2, intake cam shaftgear 3 and Transmitted chains 4.
Continuous variable valve timing apparatus as shown in Figure 1 comprises bent axle 1, intake cam shaftgear 2, exhaust cam shaftgear 3, Transmitted chains 4, the first Transmitted chains stretcher 5a, the second Transmitted chains stretcher 5b, the 3rd Transmitted chains stretcher 5c, the first Transmitted chains stretcher controller 7a, the second Transmitted chains stretcher controller 7b, the 3rd Transmitted chains stretcher controller 7c, the first connected pipes 6a, the second connected pipes 6b and the 3rd connected pipes 6c.
Bent axle 1, intake cam shaftgear 2 and exhaust cam shaftgear 3 threes are connected by Transmitted chains 4 and realize transmission, and three's sense of rotation is consistent.
The first Transmitted chains stretcher 5a is installed between bent axle 1 and intake cam shaftgear 2, and the first Transmitted chains stretcher 5a is connected with the first Transmitted chains stretcher controller 7a by the first connected pipes 6a.
The second Transmitted chains stretcher 5b is installed between intake cam shaftgear 2 and exhaust cam shaftgear 3, and the second Transmitted chains stretcher 5b is connected with the second Transmitted chains stretcher controller 7b by the second connected pipes 6b.
The 3rd Transmitted chains stretcher 5c is installed between exhaust cam shaftgear 3 and bent axle 1, and the 3rd Transmitted chains stretcher 5c is connected with the 3rd Transmitted chains stretcher controller 7c by the 3rd connected pipes 6c.
The first Transmitted chains stretcher 5a, the second Transmitted chains stretcher 5b and the 3rd Transmitted chains stretcher 5c have identical structure characteristic, and its structure as shown in Figure 2.
Transmitted chains stretcher as shown in Figure 2 comprises Idle wheel 58, drive link 53, tension spring 52, tension spring positioning boss 51, drive link slide 57, tensioning piston 56, hydraulic pressure cavity 55 and oil-feed interface 54.
Idle wheel 58 is arranged on one end of drive link 53, and the other end of drive link 53 is provided with tensioning piston 56.Drive link 53 is fixed in drive link slide 57, can only make to come and go sliding linearly.On drive link 53, be provided with tension spring positioning boss 51, tension spring 52 is arranged between tension spring positioning boss 51 and drive link slide 57, and drive link slide 57 is fixing irremovable with engine body.Hydraulic pressure cavity 55 is arranged on drive link slide 57, and the tensioning piston 56 being arranged on drive link 53 extend in hydraulic pressure cavity 55, and tensioning piston 56 can come and go sliding linearly at the interior work of hydraulic pressure cavity 55.In hydraulic pressure cavity 55, be also provided with oil-feed interface 54, oil-feed interface 54 is connected by connected pipes with the oil out port 75 of Transmitted chains stretcher controller.
Stretcher is work like this, in the time flowing into hydraulic pressure cavity 55 without any liquid, be arranged on the masterpiece of the tension spring 52 between drive link 53 and drive link slide 57 for drive link 53, therefore 58 of Idle wheels that are positioned at drive link 53 one end are pressed on Transmitted chains 4, make Transmitted chains in tensioning state.In the time having the liquid of control to flow into hydraulic pressure cavity 55, hydraulic coupling can act on tensioning piston 56, therefore drive link 53 will be subject to the double action of tension spring 52 and hydraulic coupling, its balance is broken, therefore 53 of drive links can extend, 58 of Idle wheels further compress Transmitted chains, and the Transmitted chains length that is positioned at this tensioner position section increases.Meanwhile, because the total length of Transmitted chains is fixed, therefore must there is the Transmitted chains length of another section to shorten, can be also another two sections and all shorten or another a section shortening of a segment elongation.In the time that the total liquid volume in hydraulic pressure cavity 55 is constant, the length of drive link does not change, and any change does not occur the Transmitted chains length that is positioned at this section yet.In the time that the liquid in hydraulic pressure cavity 55 is connected with return opening c under the effect of stretcher controller, the hydraulic coupling that acts on tensioning piston 56 will reduce, and under the reaction force of Transmitted chains 4, drive link 53 will shorten, and the Transmitted chains length that is positioned at this section shortens.Correspondingly, because the total length of Transmitted chains is fixed, therefore must there is the Transmitted chains length of another section to extend, can be also another two sections and all extend or another a section shortening of a segment elongation.
The first Transmitted chains stretcher controller 7a, the second Transmitted chains stretcher controller 7b and the 3rd Transmitted chains stretcher controller 7c have identical structure characteristic, and its structure as shown in Figure 3.
Transmitted chains stretcher controller as shown in Figure 3 comprises controller shell 74, control piston 71, control piston return spring 72, solenoid valve 73, oil out port 75, two external pressure hole a, high pressure oil import b and return opening c.
Control piston 71 is arranged in controller shell 74, and freely, the other end of control piston 71 is connected with the solenoid valve 73 being arranged on controller shell in control piston 71 one end.Between control piston 71 and controller shell 74, control piston return spring 72 is installed, control piston return spring 72 is coaxially installed with control piston 71.On controller shell 74, be provided with oil out port 75, and be connected with stretcher oil-feed interface 54 by connected pipes.On controller shell 74, be also provided with two external pressure hole a1 and a2, external pressure hole a1 and a2 lay respectively at outside two stroke ends of control piston 71.On controller shell 74, be also provided with high pressure oil import b and return opening c.
Transmitted chains stretcher controller is work like this, and control piston 71 can move linearly in controller shell 74, the acting in conjunction of its controlled movement piston return spring 72 processed and solenoid valve 73.
In the time of solenoid valve 73 attonity, now solenoid valve is positioned at position 0, and under the effect of control piston return spring 72, in home position, oil out port 75 is connected with return opening C, the hydraulic pressure cavity 55 that is to say Transmitted chains stretcher is connected with return opening c, and liquid can go out hydraulic pressure cavity 55 by Free-flow.
In the time that solenoid valve 73 is positioned at position 1, control piston 71 seals high pressure filler opening b and return opening c simultaneously, that is to say that the liquid in Transmitted chains stretcher hydraulic pressure cavity 55 remains unchanged.
In the time that solenoid valve is positioned at position 2, control piston sealing return opening c also opens high pressure filler opening b, and liquid enters in Transmitted chains stretcher hydraulic pressure cavity 55 through oil out port 75 and connected pipes.
That is to say, in the time that stretcher controller solenoid valve 73 is positioned at position 0, liquid in stretcher hydraulic pressure cavity 55 is communicated with return opening c, drive link 53 will bounce back short under the reaction force of Transmitted chains 4, until the power of its reaction force and tension spring 52 will no longer change the position of drive link 53 while reaching balance; In the time that stretcher controller solenoid valve 73 is positioned at position 1, liquid in stretcher hydraulic pressure cavity 55 is not all communicated with high pressure oil import b and return opening c, liquid in stretcher hydraulic pressure cavity 55 remains unchanged, there is not any variation in the position of drive link 53, irrelevant in elongation or shortening state with it, the timing situation that is to say remains unchanged, with its in advance or postponement state irrelevant; In the time that stretcher controller solenoid valve 73 is positioned at position 2, liquid in stretcher hydraulic pressure cavity 55 is communicated with and disconnects with return opening c with high pressure oil import b, high pressure oil flows in stretcher hydraulic pressure cavity 55, drive link 53 extends until solenoid valve 73 gets back to position 1 and cuts out high pressure oil import b and return opening c, and now the position of drive link 53 will remain unchanged.
Bent axle 1, intake cam shaftgear 2 and exhaust cam shaftgear 3 threes are connected by Transmitted chains 4 and realize transmission, and three's sense of rotation is consistent and be clockwise direction.In the situation that not carrying out any control operation, the first Transmitted chains stretcher 5a, the second Transmitted chains stretcher 5b and the 3rd Transmitted chains stretcher 5c under the effect of tension spring 52, make Transmitted chains 4 in tensioning state to ensure the reliability of transmission.
In order to tell about the clear principle that changes the timing of inlet and outlet door by changing length, Transmitted chains 4 is divided into three sections: this section between bent axle 1 and intake cam shaftgear 2 is called QJ section, this section between intake cam shaftgear 2 and exhaust cam shaftgear 3 is called JP section, and this section between exhaust cam shaftgear 3 and bent axle 1 is called PQ section.At 3 stretchers all without any action in the situation that, three sections of Transmitted chainss respectively under the effect of stretcher spring in tensioning state, and can normally work.
Under the effect of Transmitted chains stretcher controller, the action that can realize of stretcher is respectively the constant three kinds of situations of elongation, shortening and length.In the time that a certain stretcher extends, the Transmitted chains length between residing two wheels of this stretcher will be elongated; In the time that a certain stretcher shortens, the Transmitted chains length between residing two wheels of this stretcher will shorten; In the time that tensioner position is constant, the Transmitted chains length between residing two wheels of this stretcher just remains unchanged.After stretcher extends or shortens, under the control action of stretcher controller, can remain on this state and do not change.
For example: in the time that the first stretcher 5a extends, Transmitted chains QJ section is by elongated, therefore Transmitted chains will inevitably drag intake cam shaftgear 2 and rotate an angle with respect to bent axle 1 clockwise direction, otherwise plastic deformation or fracture will occur Transmitted chains, and air inlet timing in advance in such cases.No matter how the length of JP section and PQ section changes, and this result can not be changed.Otherwise if the first stretcher 5a shortens, Transmitted chains QJ section will shorten, therefore Transmitted chains will inevitably drag intake cam shaftgear 2 and counterclockwise rotate an angle with respect to bent axle 1, otherwise Transmitted chains will be in relaxed state, transmission will be lost efficacy, and air inlet timing in advance in such cases.If desired keep timing state constant, only need to allow the solenoid valve of corresponding stretcher controller with it in position 1.The like can draw the timing control method of exhaust camshaft.
According to device provided by the present invention and controlling method, the inlet and outlet door timing control that the present invention can realize and inlet and exhaust valve overlapping angle can be divided into following 12 kinds of situations, are respectively:
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. a continuous variable valve arrangement for controlling timing, the chain drive system of this control gear based on bent axle (1), exhaust cam shaftgear (2), intake cam shaftgear (3) and Transmitted chains (4) composition, it is characterized in that, comprise three Transmitted chains stretchers, each Transmitted chains stretcher connects a Transmitted chains stretcher controller by connected pipes; The first Transmitted chains stretcher (5a) is arranged between bent axle (1) and exhaust cam shaftgear (2), the second Transmitted chains stretcher (5b) is arranged between exhaust cam shaftgear (2) and intake cam shaftgear (3), and the 3rd Transmitted chains stretcher (5c) is arranged between bent axle (1) and intake cam shaftgear (3).
2. a kind of continuous variable valve arrangement for controlling timing according to claim 1, it is characterized in that, described Transmitted chains stretcher comprises an Idle wheel (58), and Idle wheel (58) is assemblied in one end of drive link (53), and the other end of drive link (53) is connected with tensioning piston (56); Drive link (53) is arranged in drive link slide (57), is provided with tension spring positioning boss (51) on drive link (53), between tension spring positioning boss (51) and drive link slide (57), tension spring (52) is installed; Tensioning piston (56) is assemblied in hydraulic pressure cavity (55), and it is upper that hydraulic pressure cavity (55) is fixedly mounted on drive link slide (57), drive link slide (57) be fixed on engine body; In described hydraulic pressure cavity (55), be also provided with oil-feed interface (54), this oil-feed interface is connected with connected pipes.
3. a kind of continuous variable valve arrangement for controlling timing according to claim 1, it is characterized in that, described Transmitted chains stretcher controller comprises a controller shell (74) and solenoid valve (73), is equipped with a control piston (71) on controller shell (74); One end of control piston (71) is positioned at controller shell (74), and the other end of control piston (71) is connected with solenoid valve (73); Between control piston (71) and solenoid valve (73), control piston return spring (72) is installed; On controller shell (74), be also provided with two each and every one external pressure holes (a1, a2), two external pressure holes lay respectively at outside two stroke ends of control piston (71); On controller shell (74), be also provided with high pressure oil import (b), return opening (c) and oil out port, oil out port is connected with connected pipes.
4. a kind of continuous variable valve arrangement for controlling timing according to claim 3, is characterized in that, described return spring and control piston coaxially assemble.
5. a kind of continuous variable valve arrangement for controlling timing according to claim 3, is characterized in that, described solenoid valve is arranged on controller shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209055.3A CN103939166A (en) | 2014-05-16 | 2014-05-16 | Continuous variable valve timing control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209055.3A CN103939166A (en) | 2014-05-16 | 2014-05-16 | Continuous variable valve timing control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103939166A true CN103939166A (en) | 2014-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410209055.3A Pending CN103939166A (en) | 2014-05-16 | 2014-05-16 | Continuous variable valve timing control device |
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| Country | Link |
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| CN (1) | CN103939166A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973169A (en) * | 2019-03-29 | 2019-07-05 | 英嘉动力科技无锡有限公司 | A kind of variable valve actuator for air |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3509094A1 (en) * | 1984-04-06 | 1985-10-17 | Volkswagenwerk Ag, 3180 Wolfsburg | Device for the infinitely variable adjustment of the valve timings of exhaust and refill valves |
| US4576127A (en) * | 1984-05-14 | 1986-03-18 | Nissan Motor Co., Ltd. | Valve timing control device for an internal combustion engine |
| US5109813A (en) * | 1990-07-26 | 1992-05-05 | Dr. Ing. H.C.F. Porsche Ag | Chain drive tensioning and adjusting arrangement |
| CN203822403U (en) * | 2014-05-16 | 2014-09-10 | 西华大学 | Continuous variable valve timing control device |
-
2014
- 2014-05-16 CN CN201410209055.3A patent/CN103939166A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3509094A1 (en) * | 1984-04-06 | 1985-10-17 | Volkswagenwerk Ag, 3180 Wolfsburg | Device for the infinitely variable adjustment of the valve timings of exhaust and refill valves |
| US4576127A (en) * | 1984-05-14 | 1986-03-18 | Nissan Motor Co., Ltd. | Valve timing control device for an internal combustion engine |
| US5109813A (en) * | 1990-07-26 | 1992-05-05 | Dr. Ing. H.C.F. Porsche Ag | Chain drive tensioning and adjusting arrangement |
| CN203822403U (en) * | 2014-05-16 | 2014-09-10 | 西华大学 | Continuous variable valve timing control device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973169A (en) * | 2019-03-29 | 2019-07-05 | 英嘉动力科技无锡有限公司 | A kind of variable valve actuator for air |
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Application publication date: 20140723 |