CN203822401U - Stepless variable gas distribution timing mechanism - Google Patents
Stepless variable gas distribution timing mechanism Download PDFInfo
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- CN203822401U CN203822401U CN201420219815.4U CN201420219815U CN203822401U CN 203822401 U CN203822401 U CN 203822401U CN 201420219815 U CN201420219815 U CN 201420219815U CN 203822401 U CN203822401 U CN 203822401U
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- driven inner
- inner core
- plunger
- oil
- driven
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Abstract
The utility model discloses a stepless variable gas distribution timing mechanism. A mechanical control part comprises a driving outer cylinder and a driven inner cylinder which are coaxially arranged in a sleeved mode, and a plunger pushed by an electromagnetic valve. The driving outer cylinder is coaxially and fixedly connected with a transmission wheel. A shaft hole in one end of the driven inner cylinder is fixedly connected with one shaft end of a cam shaft. The plunger is in slide fit with a shaft hole in the other end of the driven inner cylinder. A reset spring is arranged between the plunger and the shaft end of the cam shaft in a pressed mode. The driving outer cylinder and the driven inner cylinder are in transmission through inner teeth and outer teeth. The inner teeth and the outer teeth are evenly distributed on the circumference of the driving outer cylinder and the circumference of the driven inner cylinder. An oil cavity with the variable volume is formed between the driving outer cylinder and the driven inner cylinder. A circuit of a hydraulic control part comprises a cam shaft bearing position oil path, a cam shaft end inner oil path, a plunger inner oil path and radial driven inner cylinder inner oil paths, wherein the radial driven inner cylinder inner oil paths are evenly distributed in the circumference. Radial pressure releasing holes and overflow holes are evenly and circumferentially distributed in the plunger and can be communicated with the driven inner cylinder inner oil paths respectively. According to the stepless variable gas distribution timing mechanism, the volume of the oil cavity is adjusted through oil pressure, and then stepless variable gas distribution timing adjustment is achieved.
Description
(1) technical field:
The utility model relates to motor car engine air-distributing valve mechanism, is specially a kind of electrodeless variable valve timing mechanism.
(2) background technique:
Different engines distribution timings are the best valve timings that obtain according to test, thereby become design Valve-train Cam and determine the foundation of each cylinder inlet and outlet cam relative position on camshaft, but in fact, when distribution cam axle design fixed, the valve timing of motor has also just been decided, and is unalterable in engine operation process.
But the height of engine speed is flowed by inlet and outlet and cylinder combustion burning process is influential.When rotating speed is high, induction air flow ratio is high, and inertia is large, so wish that intake valve opens earlier, close evening, enters some mixed gass or air more as far as possible; Otherwise in the time that engine speed is lower, induction air flow ratio is low, and inertial flow is also little, if intake valve is opened too early, because piston now, just in up exhaust, is easy to live gas to extrude cylinder, air inlet is reduced on the contrary, engine operation is more unstable.Therefore,, in the time of the slow-speed of revolution, wish engine intake valve unlatching a bit a little later.So, when engine speed is different, be different to the requirement of valve timing.
Since the eighties in last century, there is the control mechanism of some variable valve timings in Ge great automobile production company on motorcar engine.As the VTEC mechanism of Honda Company, changeable air valve timing mechanism of Alfa Romeo company exploitation etc.It is electrodeless variable that but above mechanism all can not realize.
(3) model utility content:
For the deficiencies in the prior art, the utility model proposes a kind of electrodeless variable valve timing mechanism, mainly solve in operation process, the valve timing of motor can not electrodeless variable technical problem.
The electrodeless variable valve timing mechanism that can solve the problems of the technologies described above, comprise mechanical control section and hydraulic control part, described mechanical control section comprises the active urceolus of coaxial package and driven inner core and the plunger being promoted by solenoid valve, described active urceolus and drive wheel are coaxially connected, one end axis hole of described driven inner core and camshaft one axle head are coaxially connected, described plunger is coaxially snug fit at driven inner core the other end axis hole, in driven inner core axis hole between plunger and camshaft, press-fit return spring, described active urceolus and driven inner core pass through corresponding in plunger position, external tooth transmission, in described, external tooth circumference uniform distribution setting in active urceolus and on driven inner core, external tooth circumferential size is less than internal tooth circumferential size and the oil pocket of between formation variable volume, the loop of described hydraulic control part comprises the bearing position oil circuit of camshaft, axle head internal oil passages, plunger internal oil passages and the radially driven inner core internal oil passages corresponding to each oil pocket circumference uniform distribution of camshaft, on plunger, offer respectively the radially relief hole of circumference uniform distribution and overflow hole radially, described relief hole and overflow hole can be communicated with driven inner core internal oil passages respectively.
Described plunger puts in place to entering in driven inner core, described overflow hole sealing, described relief hole is communicated with driven inner core internal oil passages, each oil pocket oil-feed pressurize, promote external tooth turns an angle in internal tooth, realize driven inner core and drive camshaft to turn an angle forward, thereby control advance angle size.
Described plunger exits driven inner core and puts in place, and described relief hole exposes, and described overflow hole is communicated with driven inner core internal oil passages, each oil pocket draining decompression, and external tooth return, in internal tooth original position, recovers the former working position of cam.
Bearing support is installed the bearing position of described camshaft and by seal ring sealing attachment face, bearing support internal oil passages is communicated with bearing position oil circuit.
Described drive wheel can adopt biserial sprocket wheel.
The beneficial effects of the utility model:
1, the electrodeless variable valve timing mechanism of the utility model can coordinate the displacement of plunger to control oil-feed and the draining of oil pocket by oil hydraulic circuit, and then control the angle of separating between the inside and outside tooth of transmission between driving and driven inner core, thereby reach, the advance angle of intake valve is increased, the corresponding object reducing in the angle that lags.
2, the utility model is by oil pocket volume size between the inside and outside tooth of size adjustment of hydraulic fluid pressure, and then controls camshaft advancement amount in relative rotation, regulates thereby realize electrodeless variable valve timing.
(4) brief description of the drawings:
Fig. 1 is the structural representation of a kind of mode of execution of the utility model, forms minimum oil pocket between inside and outside tooth.
Fig. 2 is the A-A cut-away view in Fig. 1.
Fig. 3 is in Fig. 1 mode of execution, forms the structural representation of maximum oil pocket between inside and outside tooth.
Fig. 4 is the B-B cut-away view in Fig. 3.
Figure number mark: 1, active urceolus; 2, driven inner core; 3, solenoid valve; 4, plunger; 5, drive wheel; 6, camshaft; 7, return spring; 8, internal tooth; 9, external tooth; 10, oil pocket; 11, bearing position oil circuit; 12, camshaft axle head internal oil passages; 13, plunger internal oil passages; 14, driven inner core internal oil passages; 15, relief hole; 16, overflow hole; 17, bearing support internal oil passages; 18, seal ring; 19, cam; 20, bearing support.
(5) embodiment:
Below in conjunction with accompanying drawing illustrated embodiment, the technical solution of the utility model is described further.
The electrodeless variable valve timing mechanism of the utility model is mainly made up of mechanical control section and hydraulic control part.
1, machinery control section: comprise initiatively urceolus 1, driven inner core 2, solenoid valve 3 and plunger 4, described active urceolus 1 is coaxially fixedly mounted with drive wheel 5 (adopting biserial sprocket wheel), initiatively urceolus 1 and driven inner core 2 coaxial packages, can relatively rotate between the two, and the internal tooth 8 arranging by both left ends and external tooth 9 structures realize initiatively urceolus 1 and drive driven inner core 2 to rotate, described internal tooth 8 (three) circumference uniform distribution is opened on the inner peripheral surface of active urceolus 1, described external tooth 9 (three) circumference uniform distribution is located on driven inner core 2 excircles, the size of external tooth 9 circumferencial directions is less than the size of internal tooth 8 circumferencial directions, thereby form the oil pocket 10 of variable volume, the left end axis hole of described driven inner core 2 is little and right-hand member axis hole is large, described plunger 4 is snug fit in the little axis hole of driven inner core 2 left end, the outer end of plunger 4 connects the solenoid valve 3 of outer installment, the local large axis hole bottom that is matched with driven inner core 2 that increases, the inner of plunger 4, the macro-axis nose end interference fit of driven inner core 2 is in the left axle head of camshaft 6, the left axle head of described camshaft 6 is installed by bearing support 20, attachment face is provided with seal ring 18, be provided with cam 19 corresponding to valve position in camshaft 6, between plunger 4 the inners and camshaft 6 axle heads, press-fit return spring 7 in the large axis hole of driven inner core 2, as Fig. 1, shown in Fig. 3.
Described hydraulic control part: its oil hydraulic circuit comprises the bearing internal oil passages 17 that is radially opened in bearing support 20 inside, radially be opened in the bearing position oil circuit 11 of camshaft 6 axle end bearing positions, coaxially be opened in the camshaft axle head internal oil passages 12 of camshaft axle head, coaxially be opened in the plunger internal oil passages 13 (arise from plunger 4 inner and end at plunger 4 outer ends) of plunger 4, offer the radially driven inner core internal oil passages 14 (being communicated with corresponding each oil pocket 10) of circumference uniform distribution in driven inner core 2 inside, radially overflow hole 16 and the relief hole 15 of the circumference uniform distribution of offering respectively on the cylinder apart from plunger 4 the inners and outer end, as Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4.
Described oil hydraulic circuit has two kinds of paths.
1, solenoid valve 3 drive and return spring 7 effect under, plunger 4 outwards exits driven inner core 2 and puts in place, described relief hole 15 exposes outside driven inner core 2, overflow hole 16 connection corresponding to driven inner core internal oil passages 14.
Oil hydraulic circuit main path is: bearing internal oil passages 17---bearing position oil circuit 11---camshaft axle head internal oil passages 12---the driven large axis hole of inner core 2---plunger internal oil passages 13---relief hole 15; Oil hydraulic circuit by-pass flow path is: oil pocket 10---driven inner core internal oil passages 14---overflow hole 16---plunger internal oil passages 13, as shown in Figure 1 and Figure 2.
2, described solenoid valve 3 promotes plunger 4 and overcomes return spring 7 active forces and inwardly enter driven inner core 2 and put in place, the connection corresponding to driven inner core internal oil passages 14 of described relief hole 15, and described overflow hole 16 is sealed by the little axis hole of driven inner core 2.
Oil hydraulic circuit path is: bearing internal oil passages 17---bearing position oil circuit 11---and camshaft axle head internal oil passages 12---the large axis hole of driven inner core 2---plunger internal oil passages 13---relief hole 15---driven inner core internal oil passages 14---oil pocket 10, as shown in Figure 3, Figure 4.
Working procedure of the present utility model:
In the time of engine operation, the controlling rod of solenoid valve 3 is retracted, and under return spring 7 effects, plunger 4 moves to high order end (as shown in Figure 1), relief hole 15 on plunger 2 exposes driven inner core 2, and overflow hole 16 just communicates with driven inner core internal oil passages 14.Under pump function, engine lubrication machine oil enters camshaft 6 axle heads from bearing support 20, flow in the oil circuit of plunger 4 by the large axis hole of driven inner core 2, finally flow into oil sump by the relief hole 15 on plunger 4, now, in oil pocket 10, there is no pressure lubrication oil, drive wheel 5 drives initiatively urceolus 1, initiatively urceolus 1 drives driven inner core 2 to rotate by the internal tooth 8 and the external tooth 9 (minimum gap location) that are in contact with one another, and realizes the normal operation of camshaft 6, as shown in Figure 2.
Under some predetermined rotating speed and load condition, solenoid valve 3 is by electronically controlled fuel injection system and igniting management system incentive, the controlling rod of solenoid valve 3 stretches out, promotion plunger 4 moves right and puts in place (as shown in Figure 3), relief hole 15 on plunger 4 enters in driven inner core 2 and communicates with driven inner core internal oil passages 14, and 16 of overflow holes are sealed by the little axis hole of driven inner core 2.Under pump function, engine lubrication machine oil enters camshaft 6 axle heads from bearing support 20, flow in the oil circuit of plunger 4 by driven inner core 2 macropores, flow into oil pocket 10 by relief hole 15 and driven inner core internal oil passages 14, in rotational direction promote forward external tooth 9, thereby make active urceolus 1 and driven inner core 2 relatively rotate several angle (being illustrated in figure 4 position, maximal clearance), be that drive wheel 5 relatively rotates several angle with camshaft 6, so the advance angle of intake valve increases, the angle that lags is corresponding to be reduced.
Control the pressure of lubricant oil, can control initiatively urceolus 1 and driven inner core 2 angle in relative rotation, regulate and realize electrodeless variable valve timing.
Claims (5)
1. electrodeless variable valve timing mechanism, it is characterized in that: comprise mechanical control section and hydraulic control part, described mechanical control section comprises the active urceolus (1) of coaxial package and driven inner core (2) and the plunger (4) being promoted by solenoid valve (3), described active urceolus (1) is coaxially connected with drive wheel (5), one end axis hole of described driven inner core (2) and camshaft (6) one axle heads are coaxially connected, described plunger (4) is coaxially snug fit at driven inner core (2) the other end axis hole, in driven inner core (2) axis hole between plunger (4) and camshaft (6), press-fit return spring (7), described active urceolus (1) passes through corresponding in plunger (4) position with driven inner core (2), external tooth (8, 9) transmission, in described, external tooth (8, 9) and driven inner core (2) upper circumference uniform distribution setting interior respectively at active urceolus (1), external tooth (9) circumferential size is less than internal tooth (8) circumferential size and the oil pocket (10) of between formation variable volume, the loop of described hydraulic control part comprises the bearing position oil circuit (11) of camshaft (6), axle head internal oil passages (12), plunger internal oil passages (13) and the radially driven inner core internal oil passages (14) corresponding to each oil pocket (10) circumference uniform distribution of camshaft, on plunger (4), offer respectively the radially relief hole (15) of circumference uniform distribution and overflow hole (16) radially, described relief hole (15) and overflow hole (16) can be communicated with driven inner core internal oil passages (14) respectively.
2. electrodeless variable valve timing mechanism according to claim 1, it is characterized in that: described plunger (4) enters driven inner core (2) and puts in place, described overflow hole (16) sealing, described relief hole (15) is communicated with driven inner core internal oil passages (14), each oil pocket (10) oil-feed pressurize.
3. electrodeless variable valve timing mechanism according to claim 1, it is characterized in that: described plunger (4) exits driven inner core (2) and puts in place, described relief hole (15) exposes, described overflow hole (16) is communicated with driven inner core internal oil passages (14), each oil pocket (10) draining decompression.
4. according to the electrodeless variable valve timing mechanism described in any one in claim 1～3, it is characterized in that: bearing support (20) is installed the bearing position of described camshaft (6) and by seal ring (18) sealing attachment face, bearing support internal oil passages (17) is communicated with bearing position oil circuit (11).
5. according to the electrodeless variable valve timing mechanism described in any one in claim 1～3, it is characterized in that: described drive wheel (5) is biserial sprocket wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420219815.4U CN203822401U (en) | 2014-04-30 | 2014-04-30 | Stepless variable gas distribution timing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420219815.4U CN203822401U (en) | 2014-04-30 | 2014-04-30 | Stepless variable gas distribution timing mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN203822401U true CN203822401U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420219815.4U Expired - Fee Related CN203822401U (en) | 2014-04-30 | 2014-04-30 | Stepless variable gas distribution timing mechanism |
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| CN (1) | CN203822401U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953408A (en) * | 2014-04-30 | 2014-07-30 | 桂林电子科技大学 | Infinite variable gas distribution timing mechanism |
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2014
- 2014-04-30 CN CN201420219815.4U patent/CN203822401U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953408A (en) * | 2014-04-30 | 2014-07-30 | 桂林电子科技大学 | Infinite variable gas distribution timing mechanism |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20160430 |