CN201461012U - Single-pile cam driving high-lift-range and zero-lift-range variable gas valve bucket tappet of engine - Google Patents
Single-pile cam driving high-lift-range and zero-lift-range variable gas valve bucket tappet of engine Download PDFInfo
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- CN201461012U CN201461012U CN2009200719353U CN200920071935U CN201461012U CN 201461012 U CN201461012 U CN 201461012U CN 2009200719353 U CN2009200719353 U CN 2009200719353U CN 200920071935 U CN200920071935 U CN 200920071935U CN 201461012 U CN201461012 U CN 201461012U
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- hole
- tappet
- lift
- shell
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Abstract
The utility model relates to a single-pile cam driving high-lift-range and zero-lift-range variable gas valve bucket tappet of an engine, which comprises a bucket tappet case, a gas valve driving seat and a lock pin mechanism, wherein the bucket tappet case is covered on the gas valve driving seat, a top spring is arranged between the bucket tappet case and the top surface of the gas valve driving seat, the lock pin mechanism comprises a push pin hole, a push pin, a transmission pin hole, a transmission pin, a reset pin hole and a reset pin, the push pin hole is positioned on the bucket tappet case, the push pin can slide left and right in the push pin hole, the transmission pin hole is positioned on the gas valve driving seat, the transmission pin can slide left and right in the transmission pin hole, the reset pin hole is positioned on the bucket tappet case, the reset pin can slide left and right in the reset pin hole, the head of the transmission pin extends into the push pin hole, the head of the reset pin extends into the transmission pin hole, and the tail of the reset pin butts against a reset spring. The gas valve can operates in two states: a high-lift-range state and a zero-lift-range state by utilizing the single-pile cam, the structure is simple, the cost is low, and in addition, the change on a cylinder cap of the motor during assembly is small.
Description
Technical field
The utility model relates to the valve actuating mechanism that a kind of engine valve is opened the lift two-stage variable.
Background technique
During the petrol engine operation at part load, throttle opening is less, and pumping loss increases, and the thermal efficiency is not high when causing the petrol engine operation at part load, and fuel economy is poor.At this moment, by stopping to the partial cylinders supplying oil and gas, this part cylinder is quit work, thereby improve the load of all the other working cylinders, to improve the petrol engine thermal efficiency, the technology that reduces discharging simultaneously is called cylinder stopping technique.When vehicle needs stronger power, when promptly the total load of motor is brought up to certain level, recover again to out-of-work cylinder supplying oil and gas, make this part cylinder recover proper functioning, satisfy power demands such as vehicle acceleration.According to disclosed, motor corporations such as GM, CHRYSLER and HONDA have successfully developed the petrol engine that many moneys have the cylinder deactivation function, and equipment listing vehicle, and the height that is subjected to market is welcome.
Realize the cylinder deactivation function, require motor to stop/recovering to certain cylinder fuel feeding, air feed according to the instruction of ECU (Electrical Control Unit) (ECU).The stopping and recovering fairly simple for present most electronic injection gasoline engine of fuel feeding, and the difficulty that stops/recovering of air feed wants big, require valve actuating mechanism to possess the two kinds of working staties that can switch mutually, and this switch motion can be the accurately control of ECU (Electrical Control Unit) institute.
Existing a kind of valve actuating mechanism with cylinder deactivation function is made up of inner cylinder, urceolus, latch gear etc., each cam must be made up of three peaches on the engine cam, the cam peach of two high lifts drives the tappet urceolus, the zero lift cam peach that is clipped in the middle is corresponding with the inner cylinder of tappet, and inner cylinder connects and the driving valve.During tappet lock pin mechanism locking, tappet urceolus and inner cylinder are an integral body, so the cam peach of high lift finally drives valve, realize normal intake and exhaust work; When latch gear is in released state, tappet urceolus and inner cylinder break away from, the cam peach of high lift drives the tappet urceolus and moves up and down with respect to inner cylinder, can not affact on the valve, the inner cylinder that is connected with valve is driven by the intermediate cam peach of zero lift only, and the actual not motion of valve promptly is in closed condition all the time, this cylinder stops inlet and outlet, realizes cylinder deactivation.The locking of latch gear and release are by the machine oil drive controlling, and machine oil is controlled by the solenoid valve of ECU (Electrical Control Unit) management, thereby the switching that finally realizes above-mentioned two kinds of working staties is controlled flexibly by ECU (Electrical Control Unit).
The valve actuating mechanism that above-mentioned cylinder deactivation is used, have that size is big, complex structure, to problems such as requirement on machining accuracy height, cost height, particularly require the cam of three peach formulas, in the time need on the basis of regular gasoline machine, developing cylinder stopping technique, the design of camshaft and cylinder head will be required to remodify, can not produce with former motor conllinear, cause the problems such as development cost of great number.
The model utility content
The technical problems to be solved in the utility model provides that a kind of size is little, simple in structure, cost is low, can use the cam-actuated high lift of single peach-zero lift changeable air valve tappet, can realize high lift (the normal intake and exhaust of valve) and zero lift (valve is closed all the time) two states, and between two states, switch flexibly.
The utility model is that the technological scheme that its technical problem of solution is adopted is: a kind of motor list peach cam drive high lift-zero lift changeable air valve tappet, comprise tappet shell, the valve actuation seat that can move up and down with respect to the tappet shell, but and the latch gear of above-mentioned tappet shell of locking and valve actuation seat, described tappet jacket is on the valve actuation seat, be provided with the top spring between the end face of tappet shell and valve actuation seat, described latch gear comprises: be arranged in the promotion pin-and-hole on the tappet shell and can promoting the pushing pin that pin-and-hole horizontally slips; The driving pin that is arranged in the transmission pin-and-hole on the valve actuation seat and can horizontally slips at the transmission pin-and-hole; The return pin that is positioned at the return pin-and-hole on the tappet shell and can horizontally slips at the return pin-and-hole; The head of described driving pin stretches in the described promotion pin-and-hole; The head of described return pin stretches in the described transmission pin-and-hole; The afterbody of described return pin and a return spring lean.
Preferably, described promotion pin-and-hole is connected with an oil inlet hole.
Further, described promotion pin-and-hole internal fixation assembles an oil-feed sleeve, and described pushing pin is positioned at the oil-feed sleeve.
Further, described tappet shell is provided with an annular oil groove, and described oil inlet hole is connected with annular oil groove.
Preferably, described tappet shell comprises a housing and the inner ring that fixedly is assemblied on the inner walls.
Preferably, described top spring is a volute spring.
Preferably, be with retaining spring on the described driving pin, the end of transmission pin-and-hole fixedly is equipped with abutment sleeve and retaining spring leans.
Preferably, also comprise the pore that is connected with described return pin-and-hole.
Preferably, described valve actuation seat is provided with guide slot vertically, and the top of described guide slot is provided with positioning convex.
The beneficial effects of the utility model are, utilize the latch gear can locking or release tappet shell and valve actuation seat, thereby when utilizing single peach cam drive tappet shell, just can make valve work in high lift, zero lift two states, be used to realize petrol engine cylinder stopping technique and diesel engine intake swirl, reduce engine emission and oil consumption; The utility model is simple in structure, volume is little, in light weight, cost is low, and when assembling is less to the change of engine cylinder cover.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is further specified.
Fig. 1 is a sectional view of using the valve actuating mechanism of the utility model list peach cam drive high lift-zero lift changeable air valve tappet.
Fig. 2 is the stereogram of valve actuating mechanism shown in Figure 1.
Fig. 3 is the left view of the utility model list peach cam drive high lift-zero lift changeable air valve tappet.
Fig. 4 is the worm's eye view of the utility model list peach cam drive high lift-zero lift changeable air valve tappet.
Fig. 5 is that the utility model changeable air valve tappet is applied to the attainable valve lift diagram of motor.
Fig. 6 is the sectional structure chart (high lift state) of the utility model changeable air valve tappet.
Fig. 7, Fig. 8 are the sectional structure charts (zero lift state) of the utility model changeable air valve tappet.
Among the figure: 1 engine cam, 2 engine valves, 3 cotter seats and locker, 4 valve spring, 5 single peach cam drive high lift-zero lift changeable air valve tappets, 6 annular oil grooves, 7 oil inlet holes, 8 guide slots, 9 pores, 10 top springs, 11 inner rings, 12 valve actuation seats, 13 oil-feed sleeves, 14 pushing pins, 15 abutment sleeves, 16 driving pins, 17 retaining springs, 18 return pins, 19 return springs, 20 tappet shells, 21 positioning convex
Embodiment
Referring to Fig. 1～Fig. 4, will single peach cam drive implementation of high lift-zero lift changeable air valve tappet of the utility model embodiment be described.
As depicted in figs. 1 and 2, engine running drives camshaft 1 and rotates, and camshaft 1 contacts with the tappet shell 20 of valve tappet 5, drives valve tappet 5 and moves up and down in the tappet hole of cylinder head.
Be fixed with spring seat and locker 3 on the engine valve 2, spring seat has valve spring 4, the upper end of engine valve 2 is connected with valve actuation seat 12, be provided with a latch gear between valve actuation seat 12 and the tappet shell 20, when the latch gear locking, valve actuation seat 12 and tappet shell 20 can together move up and down, thereby drive valve 2 opening and closing, realize the cylinder inlet and outlet, this is the high lift state; When the latch gear release, valve actuation seat 12 can move up and down with respect to tappet shell 20, and the motion of camshaft 1 can't be delivered to valve 2, and valve 2 keeps closing under the effect of valve spring 4, this is the zero lift state, and attainable valve lift diagram as shown in Figure 5.
As shown in Figure 6, tappet shell 20 cover on valve actuation seat 12 above, be provided with top spring 10 between the end face of tappet shell 20 and valve actuation seat 12, tappet shell 20 comprises a housing and an inner ring 11, and inner ring 11 is fixed on the inner walls by the mode of interference fit.Valve actuation seat 12 is slidingly matched with the endoporus of inner ring 11, and top spring 10 is a volute spring.
The top of valve actuation seat 12 is provided with a transmission pin-and-hole, driving pin 16 can horizontally slip in the transmission pin-and-hole, be with retaining spring 17 on the driving pin 16, one end of transmission pin-and-hole is fixed with abutment sleeve 15, the left end of retaining spring 17 is on abutment sleeve 15, and right-hand member is resisted against on the annular protrusion on driving pin 16 surfaces, when the two ends of driving pin 16 are not subjected to external force, retaining spring 17 makes driving pin 16 be positioned the centre of transmission pin-and-hole, its two correct concordant with the two ends of transmission pin-and-hole.One side of inner ring 11 is provided with one and promotes pin-and-hole, and a pushing pin 14 can horizontally slip in promoting pin-and-hole.The opposite side of inner ring 11 is provided with a return pin-and-hole, the return pin-and-hole is a blind hole, return spring 19 and return pin 18 wherein are housed successively, return pin 18 can horizontally slip in the return pin-and-hole, when return spring 19 was in most compressed state, the end of return pin 18 was just in time concordant with the aperture of return pin-and-hole.In order to guarantee that return pin 18 can slide swimmingly, has the pore 9 that is connected with the return pin-and-hole on the inner ring 11 in the return pin-and-hole.
Promote to be provided with an oil-feed sleeve 13 in the pin-and-hole, pushing pin 14 slides in oil-feed sleeve 13. and promote pin-and-hole and be connected with an oil inlet hole 7, oil inlet hole 7 is connected with a annular oil groove 6 on the tappet shell, as shown in Figure 3. by electromagnetic valve, high-pressure oil in the engine cylinder cap Oil passage is through annular oil groove 6, oil inlet hole 7 enters in the oil-feed sleeve 13, drive pushing pin 14, driving pin 16, return pin 18 moves right, be in most compressed state until return spring 19, as shown in Figure 7, at this moment, latch gear is in released state, tappet shell 20 separates with valve actuation seat 12. when cam 1 drives tappet shell 20, because the elastic force several times of valve spring 4 are greater than the elastic force of top spring 10, the relative valve actuation seat 12 of elastic force that tappet shell 20 overcomes top spring 10 moves downward, as shown in Figure 8, and valve actuation seat 12 and engine valve 2 keep motionless, be that valve 2 is closed all the time, realize the zero lift state. after cam rotation arrives its basic circle segment type line and tappet shell 20 contacts, under 10 effects of top spring, get back to state shown in Figure 7 if tappet shell 20 moves upward. this moment solenoid valve shuts engine cylinder cap Oil passage engine oil supplying, it is the active force that pushing pin 14 no longer is subjected to high-pressure oil, under the effect of return spring 19, return pin 18, driving pin 16, pushing pin 14 is moved to the left to position shown in Figure 6, latch gear locking, valve return to the high lift state.
The utility model is simple in structure, element is less, can reduce cost of production, and using variable valve actuator for air of the present utility model can be by single peach cam drive, need not to change the design of former engine cam and cylinder head, realize the control of petrol engine cylinder deactivation and diesel engine intake swirl, reduce the oil consumption and the discharging of motor.This changeable air valve tappet can be used for petrol engine and realizes previously described cylinder stopping technique, can also be used on many intake valves diesel engine, by closing wherein certain intake valve all the time, realizes the specific charge motion form that needs.
The description of the foregoing description is to be used for more being expressly understood the utility model, but the utility model is not limited to the disclosed embodiments.
Claims (9)
1. motor list peach cam drive high lift-zero lift changeable air valve tappet, comprise tappet shell (20), the valve actuation seat (12) that can move up and down with respect to the tappet shell, but and the latch gear of above-mentioned tappet shell of locking (20) and valve actuation seat (12), it is characterized in that: described tappet shell (20) cover on valve actuation seat (12) above, be provided with top spring (10) between the end face of tappet shell (20) and valve actuation seat (12), described latch gear comprises:
Be arranged in the promotion pin-and-hole on the tappet shell (20) and can promoting the pushing pin (14) that pin-and-hole horizontally slips;
The driving pin (16) that is arranged in the transmission pin-and-hole on the valve actuation seat (12) and can horizontally slips at the transmission pin-and-hole;
The return pin (18) that is positioned at the return pin-and-hole on the tappet shell (20) and can horizontally slips at the return pin-and-hole;
The head of described driving pin (16) stretches in the described promotion pin-and-hole;
The head of described return pin (18) stretches in the described transmission pin-and-hole;
The afterbody of described return pin (18) and a return spring (19) lean.
2. changeable air valve tappet according to claim 1 is characterized in that: described promotion pin-and-hole is connected with an oil inlet hole (7).
3. changeable air valve tappet according to claim 2 is characterized in that: described promotion pin-and-hole internal fixation is equipped with an oil-feed sleeve (13), and described pushing pin (14) is positioned at oil-feed sleeve (13).
4. changeable air valve tappet according to claim 2 is characterized in that: described tappet shell (20) is provided with an annular oil groove (6), and described oil inlet hole (7) is connected with annular oil groove (6).
5. changeable air valve tappet according to claim 1 is characterized in that: described tappet shell (20) comprises a housing and the inner ring (11) that fixedly is assemblied on the inner walls.
6. changeable air valve tappet according to claim 1 is characterized in that: described top spring (10) is a volute spring.
7. changeable air valve tappet according to claim 1 is characterized in that: be with retaining spring (17) on the described driving pin (16), the end of transmission pin-and-hole fixedly is equipped with abutment sleeve (15) and leans with retaining spring (17).
8. changeable air valve tappet according to claim 1 is characterized in that: also comprise the pore (9) that is connected with described return pin-and-hole.
9. changeable air valve tappet according to claim 1 is characterized in that: described valve actuation seat (12) is provided with guide slot (8) vertically, and the top of described guide slot (8) is provided with positioning convex (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200719353U CN201461012U (en) | 2009-05-08 | 2009-05-08 | Single-pile cam driving high-lift-range and zero-lift-range variable gas valve bucket tappet of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200719353U CN201461012U (en) | 2009-05-08 | 2009-05-08 | Single-pile cam driving high-lift-range and zero-lift-range variable gas valve bucket tappet of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201461012U true CN201461012U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200719353U Expired - Lifetime CN201461012U (en) | 2009-05-08 | 2009-05-08 | Single-pile cam driving high-lift-range and zero-lift-range variable gas valve bucket tappet of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201461012U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886561A (en) * | 2010-06-30 | 2010-11-17 | 芜湖杰锋汽车动力系统有限公司 | Mechanical flameout tappet for engine |
| CN102477875A (en) * | 2010-11-30 | 2012-05-30 | 比亚迪股份有限公司 | Valve driving mechanism for internal combustion engines |
| CN108049928A (en) * | 2017-10-23 | 2018-05-18 | 燕山大学 | A kind of twin cam shaft becomes Stroke Engine distribution switching mechanism |
-
2009
- 2009-05-08 CN CN2009200719353U patent/CN201461012U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886561A (en) * | 2010-06-30 | 2010-11-17 | 芜湖杰锋汽车动力系统有限公司 | Mechanical flameout tappet for engine |
| CN101886561B (en) * | 2010-06-30 | 2012-05-23 | 芜湖杰锋汽车动力系统有限公司 | Mechanical flameout tappet for engine |
| CN102477875A (en) * | 2010-11-30 | 2012-05-30 | 比亚迪股份有限公司 | Valve driving mechanism for internal combustion engines |
| CN102477875B (en) * | 2010-11-30 | 2015-03-25 | 比亚迪股份有限公司 | Valve driving mechanism for internal combustion engines |
| CN108049928A (en) * | 2017-10-23 | 2018-05-18 | 燕山大学 | A kind of twin cam shaft becomes Stroke Engine distribution switching mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100512 Effective date of abandoning: 20090508 |