CN202001072U - Cam device for adjusting air valve of engine - Google Patents
Cam device for adjusting air valve of engine Download PDFInfo
- Publication number
- CN202001072U CN202001072U CN2010206093558U CN201020609355U CN202001072U CN 202001072 U CN202001072 U CN 202001072U CN 2010206093558 U CN2010206093558 U CN 2010206093558U CN 201020609355 U CN201020609355 U CN 201020609355U CN 202001072 U CN202001072 U CN 202001072U
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- lock pin
- cam
- peach
- pin groove
- camshaft
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Abstract
The utility model relates to a cam device for adjusting an air valve of an engine. The cam device comprises a cam spindle and a cam shaft. The inner periphery of an installation hole of the cam spindle is provided with a first lockpin groove, in which an elastic piece and a lock pin are arranged. A second lockpin groove corresponding to the first lockpin groove is arranged in a cam spindle seat of the cam shaft, and is provided with an unlock pin therein. Under the effect of pressure in a pressure chamber of the cam shaft, the unlock pin is capable of pushing and pressing the lock pin, so that the lock pin can move between a first position and a second position, so as to enable the cam spindle to rotate along with or without the cam shaft. The cam device of the utility model allows size diminishment, structure simplification and cost reduction of air valve driving mechanisms used for cylinder deactivation. Especially, when the cylinder deactivation technology is developed with respect to common gasoline engines, air valve driving mechanisms and cylinder covers are not needed to be modified and can be produced via the same original engine production lines, reducing the development and manufacture cost.
Description
Technical field
The utility model relates to the explosive motor field; More particularly, the utility model relates to a kind of cam gear that is used to regulate engine valve.
Background technique
As everyone knows, when the explosive motor operation at part load, throttle opening is less, and pumping loss increases, and the thermal efficiency is not high when causing the explosive motor operation at part load, and fuel economy is poor.At this moment,, this part cylinder is quit work, thereby improve the load of all the other working cylinders,, reduce discharging simultaneously to improve the explosive motor thermal efficiency by stopping to the partial cylinders supplying oil and gas.This technology 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.
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.
The development of companies such as at present existing EATON, Schaeffler-INA is also produced the valve actuating mechanism that can realize the cylinder deactivation function.The cylinder deactivation of Schaeffler-INA company is made up of inner cylinder, urceolus, latch gear etc. with valve tappet, each cam must be made up of three cam peaches on the engine cam device, 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 product of EATON company principle with it is similar, and just form is the rocking arm type valve mechanism.
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 motor, developing cylinder stopping technique, to require to remodify the design of cam gear, valve actuating mechanism and cylinder head, can not produce, cause problems such as the exploitation of great number and cost of production with former motor conllinear.
The model utility content
The utility model proposes in view of above problem, purpose provide a kind of change on the conventional cam gear basis little, just can realize under the different machine oil control strategies that by the partial structurtes design the flexible switching between nominal situation and two kinds of running statees of cylinder deactivation operating mode, the valve actuating mechanism that need not change former cylinder cap simultaneously design.This cam gear can be used for petrol engine and realizes previously described cylinder stopping technique.
Provide a kind of cam gear that is used to regulate engine valve according to of the present utility model.Described cam gear comprises: the cam peach; Camshaft, the inside of described camshaft has pressure chamber, and described camshaft is provided with the cam peach seat that is used to assemble described cam peach, and the periphery of described cam peach seat is circular.In this cam gear, described cam peach is provided with circular mounting hole, thereby and described cam peach be enclosed within on the cam peach seat of described camshaft periphery loose fit with described cam peach seat by described mounting hole.The mounting hole of described cam peach be provided with the first lock pin groove interior week, in the described first lock pin groove, be provided with elastic component and lock pin, described elastic component radially promotes described lock pin to the surface of described mounting hole along described mounting hole, described cam peach seat is provided with and the corresponding second lock pin groove of the described first lock pin groove, the described second lock pin groove communicates with described pressure chamber and be provided with latch in the described second lock pin groove, described latch can push described lock pin under the effect of described pressure in pressure cavity, thereby the structure of described cam gear is arranged to described lock pin and can be moved between the primary importance and the second place, wherein: at described primary importance place, described lock pin is promoted by the elastic force of described elastic component and a part is in the described first lock pin groove, a part is in the described second lock pin groove, makes described cam peach to rotate with camshaft; At described second place place, described lock pin is pushed in the described first lock pin groove by described latch and described latch still is positioned at the described second lock pin groove, makes described cam peach not rotate with described camshaft.By the cam gear of setting like this, make by rotating the intermittence of lock pin control cam peach, so can come the motion state of adjustment cam peach by the pressure in the adjusting pressure chamber.
Alternatively, in aforesaid cam gear, design for round end with the contacted end of described latch on the described lock pin, perhaps/and, design for round end with the contacted end of described lock pin on the described latch.By design like this, guaranteed the relative rotation of the smoothness of cam peach and camshaft.
Alternatively, in aforesaid cam gear, the inwall of the described first lock pin groove is provided with step, and when making in described lock pin submerges the described first lock pin groove, the end near described step on the described lock pin is against on the described step.By design like this, make pressure in the pressure chamber be easy to control camshaft, be unlikely to described lock pin and submerge too dark and make latch partly is stuck in influences device in the described first lock pin groove running in the described first lock pin groove.
Alternatively, in aforesaid cam gear, described elastic component is a helical spring.By design like this, use the spring of most common form, can reduce design cost.
Alternatively, in aforesaid cam gear, the pressure medium in the described pressure chamber is a machine oil.By design like this, can realize good control performance by machine oil.
This shows, realized advantageously that according to cam gear of the present utility model size is little, the effect of simplified structure, and reduced requirement, reduced cost machining accuracy; Also be easy in addition on the basis of conventional internal combustion engines, develop cylinder stopping technique, can produce, save problems such as exploitation and cost of production effectively with former motor conllinear.
Description of drawings
With reference to accompanying drawing, disclosure of the present utility model will be more obvious.Should understand, these accompanying drawings only are used for schematic, illustrative purpose, and are not intended to limit the utility model.Among the figure:
Fig. 1 schematically shows the stereogram according to cam gear of the present utility model and the engine valve tappet that is mated;
Fig. 2 is the schematic cross-section according to the camshaft of cam gear of the present utility model, and wherein, Fig. 2 (a) cuts open the sectional view of getting along the dotted line among Fig. 2 (b); Fig. 2 (b) cuts open the sectional view of getting along the dotted line among Fig. 2 (a);
Fig. 3 is the schematic cross-section according to the cam peach of cam gear of the present utility model, wherein, Fig. 3 (a) and Fig. 3 (b) be along Fig. 3 (c) but in dotted line cut open not shown elastic component and lock pin among elastic component and lock pin, Fig. 3 (b) be shown among the sectional view Fig. 3 (a) that gets, Fig. 3 (c) cuts open the sectional view of getting along the dotted line among Fig. 3 (b); And
Fig. 4 is according to the cam peach of cam gear of the present utility model and the assembling schematic representation of camshaft, wherein show the different cooperation position of cam peach and camshaft, wherein, Fig. 4 (a) shows the example states that is positioned at the second place, and Fig. 4 (b) and Fig. 4 (c) then show the example states that is positioned at primary importance.
Embodiment
Describe embodiment of the present utility model with reference to the accompanying drawings in detail.Identical reference character is used for the identical technical characteristics of mark in the accompanying drawing.Following description only is an illustrative, exemplary, though wherein be illustrated according to embodiment of the present utility model, should understand, and other modification mode of execution also will fall within the protection domain of the present utility model.
Fig. 1 schematically shows and stereogram according to cam gear of the present utility model and the engine valve tappet that is mated.As can be seen from the figure, match with engine valve tappet according to cam gear of the present utility model, when cam gear turns round, under the situation that the cam peach is rotated with camshaft, the cam peach of rotating promotes the on-off action that valve tappet can be realized valve, plays the effect of the valve of regulating motor.Can understand, in Fig. 1, only schematically show the cam gear part of motor and the part of valve gear; But, the those skilled in the art is easy to expect and this part other common structure that join, internal-combustion engine, crank etc. for example, that is to say that the those skilled in the art can expect the engine components that other is adjacent immediately in the nature of things and it is linked together and form a complete motor after seeing this figure.Obviously, these can also should be regarded as being incorporated herein herein by the part (these also belong to the prior art content) that the those skilled in the art expected immediately.
In conjunction with Fig. 2 and Fig. 3, the those skilled in the art can more clearly understand the details of present embodiment.Fig. 2 is the schematic cross-section according to the camshaft of cam gear of the present utility model, and wherein, Fig. 2 (a) cuts open the sectional view of getting (observing along the direction of arrow) along the dotted line among Fig. 2 (b); Fig. 2 (b) cuts open the sectional view of getting along the dotted line among Fig. 2 (a).Fig. 3 is the schematic cross-section according to the cam peach of cam gear of the present utility model, wherein, Fig. 3 (a) and Fig. 3 (b) be along Fig. 3 (c) but in dotted line cut open not shown elastic component (helical spring) and lock pin among elastic component (helical spring) and lock pin, Fig. 3 (b) be shown among the sectional view Fig. 3 (a) that gets, Fig. 3 (c) cuts open the sectional view of getting along the dotted line among Fig. 3 (b).
As can be seen from the figure, the cam gear that is used to regulate engine valve of illustrated embodiment comprises cam peach 10 and camshaft 20 (seeing Fig. 1 and Fig. 5).
As shown in Figure 2, the inside of camshaft 20 has pressure chamber 21 and pressure medium channel 25, and camshaft 20 is provided with the cam peach seat 22 that is used to assemble cam peach 10.Pressure medium in the camshaft 20 preferably but not exclusively be machine oil because use machine oil can realize good control performance.
The periphery of cam peach seat 22 is circular.The body and the latch 24 of camshaft 20 have been shown in Fig. 2 (a), have been provided with pressure chamber 21, the second lock pin groove 23 and pressure medium channel 25 in the body of camshaft 20.As can be seen, the pressure chamber 21 and the second lock pin groove 23 communicate from Fig. 2 (b).Separating with the body of camshaft 20 and in this body exterior in the latch 24 shown in Fig. 2 (a), and under the assembling situation of reality, as shown in 4, is the second lock pin groove 23 that is positioned at camshaft 20.
As shown in Figure 3, in this cam gear, cam peach 10 is provided with circular mounting hole 11, thereby and cam peach 10 be enclosed within on the cam peach seat 22 of camshaft 20 periphery loose fit with cam peach seat 22 by mounting hole 11.Should understand, " loose fit " herein just shows between the mounting hole 11 of cam peach seat 22 and cam peach 10 gapped slightly so that the two breaks away from common running in due course, and the mounting hole 11 of cam peach 10 is not big cam peach 10 is optionally come off from cam peach seat 22; And cam peach seat 22 can preferably, suitably limit the axial motion of cam peach 10 on camshaft 20, makes it can not break away from cam peach seat 22 (for example by snap ring etc.).More preferably, should suitably choose the mounting hole 11 of cam peach 10 and the gap between the cam peach seat 22 and fit quality (for example by improving the surface Machining precision of the two), thus make the two gap neither can be too closely again can the build-up of pressure medium a large amount of leakages.
The mounting hole 11 of cam peach 10 be provided with the first lock pin groove 12 interior week, in the first lock pin groove 12, be provided with elastic component 13 and lock pin 14, elastic component 13 radially promotes lock pin 14 to the surface of mounting hole 11 along mounting hole 11.This elastic component 13 preferably but not exclusively be helical spring like this, by using the spring of most common form, can reduce design cost.This first lock pin groove 12 vertically be preferably along mounting hole 11 radially and towards the bump 16 of cam peach 10.The material of lock pin 14 is preferably the rigidity material.As previously mentioned, cam peach seat 22 is provided with and the first lock pin groove, the 12 corresponding second lock pin grooves 23, the second lock pin groove 23 communicates with pressure chamber 21 and be provided with latch 24 in the second lock pin groove 23, latch 24 can push lock pin 14 under the effect of pressure chamber 21 internal pressures, thereby the structure of cam gear is arranged to lock pin 14 and can be moved between the primary importance and the second place.
Fig. 4 among Fig. 4 (a) shows the example states that is positioned at said second position, and Fig. 4 (b) and Fig. 4 (c) then show the example states that is positioned at above-mentioned primary importance.At described primary importance place, lock pin 14 is promoted by the elastic force of elastic component 13 and a part is in the first lock pin groove 12, a part is in the second lock pin groove 23, makes cam peach 10 to rotate with camshaft 20; At described second place place, lock pin 14 is unlocked pin 24 and is pushed in the first lock pin groove 12 and latch 24 still is positioned at the second lock pin groove 23, makes cam peach 10 not rotate with camshaft 20.In Fig. 4 (b) and Fig. 4 (c), cam peach 10 is no longer rotated with camshaft 20, so after camshaft 20 had circumferentially rotated some angle, cam peach 10 is rotation together not.Can understand, in the cam gear that so is provided with, by rotating the intermittence of utilizing lock pin 14 control cam peaches 10, so thereby the motion state that can regulate the pressure adjustment cam peach 10 in the pressure chamber 21 effectively.
In preferred embodiment, design for round end with latch 24 contacted ends on the lock pin 14, perhaps/and, design for round end with lock pin 14 contacted ends on the latch 24.By design like this, guaranteed the relative rotation of the smoothness of cam peach and camshaft, and the impact that produces when changing of the relative status that has reduced cam peach 10 and camshaft 20.
Another preferred embodiment in, as shown in Fig. 3 and Fig. 5, the inwall of the first lock pin groove 12 is provided with step 15, when making when lock pin 14 just submerges the first lock pin groove 12 in, an end of close step 15 is against on the step 15 on the lock pin 14.By design like this, make pressure in the pressure chamber be easy to control camshaft, be unlikely to described lock pin and submerge and cross dark in the described first lock pin groove and make latch partly is stuck in influences device in the described first lock pin groove running.Correspondingly, in other embodiments, in camshaft 20, also can be provided with similar step so that carry out EDU control.
By above detailed description as can be seen, aforesaid cam gear of the present utility model can realize advantageously that size is little, the effect of simplified structure, and can reduce the requirement of machining accuracy and reduce cost; Also be easy in addition on the basis of conventional internal combustion engines, develop cylinder stopping technique, can produce, save problems such as exploitation and cost of production effectively with former motor conllinear.
Can understand, cam gear of the present utility model is applied to explosive motor, promptly can obtain to realize the explosive motor of cylinder deactivation function.This explosive motor can be realized the cylinder deactivation function, and cost is lower.More advantageously, on various explosive motors, all cam gear of the present utility model can be set, and can on the basis of not changing former engine cylinder cover design and air valve structure design, realize the remodeling of motor, thereby produce the cylinder deactivation function.Like this, when when cam peach and camshaft rotate together, the cam peach drives valve tappet and makes the normal opening and closing of valve of motor; When the cam peach was not rotated simultaneously with camshaft, the cam peach no longer drove valve tappet owing to no longer rotate, thereby makes the valve of motor close all the time, realized the air feed that stops of cylinder.Owing to be processed into the form of hollow in the camshaft, the inner space constitutes pressure chamber; According to the pressure medium state in the command control pressure chamber of ECU (Electrical Control Unit) (ECU), control the position of lock pin in the lock pin groove by external pressure medium control valve, thereby realize two kinds of positions of cam peach and cam gear.
As mentioned above, with reference to accompanying drawing embodiment of the present utility model is had been described in detail, but should understand, the application is intended to make these details to constitute restriction to the utility model protection domain.In addition; in context at the different different technologies features that mode of execution proposed; constitute new mode of execution all can arbitrarily carrying out independent assortment to use under the situation of principle of the present utility model, this will also fall in the definite protection domain of the utility model appending claims undoubtedly.Under situation about not deviating from according to spirit and scope of the present utility model, can be equal to or similarly change these structures, these changes will also drop in the definite protection domain of the utility model appending claims.
Claims (5)
1. a cam gear that is used to regulate engine valve is characterized in that, described cam gear comprises:
The cam peach;
Camshaft, the inside of described camshaft has pressure chamber, and described camshaft is provided with the cam peach seat that is used to assemble described cam peach, and the periphery of described cam peach seat is circular;
Described cam peach is provided with circular mounting hole, thereby and described cam peach be enclosed within on the cam peach seat of described camshaft periphery loose fit with described cam peach seat by described mounting hole,
The mounting hole of described cam peach be provided with the first lock pin groove interior week, in the described first lock pin groove, be provided with elastic component and lock pin, described elastic component radially promotes described lock pin to the surface of described mounting hole along described mounting hole, described cam peach seat is provided with and the corresponding second lock pin groove of the described first lock pin groove, the described second lock pin groove communicates with described pressure chamber and be provided with latch in the described second lock pin groove, described latch can push described lock pin under the effect of described pressure in pressure cavity, thereby the structure of described cam gear is arranged to described lock pin and can be moved between the primary importance and the second place, wherein: at described primary importance place, described lock pin is promoted by the elastic force of described elastic component and a part is in the described first lock pin groove, a part is in the described second lock pin groove, makes described cam peach to rotate with described camshaft; At described second place place, described lock pin is pushed in the described first lock pin groove by described latch and described latch still is positioned at the described second lock pin groove, makes described cam peach not rotate with described camshaft.
2. cam gear as claimed in claim 1 is characterized in that, designs for round end with the contacted end of described latch on the described lock pin, perhaps/and, design for round end with the contacted end of described lock pin on the described latch.
3. cam gear as claimed in claim 1 or 2 is characterized in that the inwall of the described first lock pin groove is provided with step, and when making in described lock pin submerges the described first lock pin groove, the end near described step on the described lock pin is against on the described step.
4. cam gear as claimed in claim 1 or 2 is characterized in that, described elastic component is a helical spring.
5. cam gear as claimed in claim 1 or 2 is characterized in that, the pressure medium in the described pressure chamber is a machine oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206093558U CN202001072U (en) | 2010-11-16 | 2010-11-16 | Cam device for adjusting air valve of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206093558U CN202001072U (en) | 2010-11-16 | 2010-11-16 | Cam device for adjusting air valve of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202001072U true CN202001072U (en) | 2011-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206093558U Expired - Fee Related CN202001072U (en) | 2010-11-16 | 2010-11-16 | Cam device for adjusting air valve of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202001072U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277159A (en) * | 2013-05-15 | 2013-09-04 | 奇瑞汽车股份有限公司 | Cam shaft mechanism with cylinder extinguishing function |
| CN105781649A (en) * | 2016-04-05 | 2016-07-20 | 陈焕祥 | Valve control device of tractor |
| CN110355595A (en) * | 2019-08-20 | 2019-10-22 | 珠海格力精密模具有限公司 | Height-adjustable cam structure formula parts fixation jig |
| CN112282882A (en) * | 2020-11-30 | 2021-01-29 | 一汽解放汽车有限公司 | Camshaft assembly for controlling engine cylinder valve and vehicle |
| CN112554985A (en) * | 2019-09-26 | 2021-03-26 | 上海汽车集团股份有限公司 | Valve train drive device |
-
2010
- 2010-11-16 CN CN2010206093558U patent/CN202001072U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277159A (en) * | 2013-05-15 | 2013-09-04 | 奇瑞汽车股份有限公司 | Cam shaft mechanism with cylinder extinguishing function |
| CN105781649A (en) * | 2016-04-05 | 2016-07-20 | 陈焕祥 | Valve control device of tractor |
| CN110355595A (en) * | 2019-08-20 | 2019-10-22 | 珠海格力精密模具有限公司 | Height-adjustable cam structure formula parts fixation jig |
| CN112554985A (en) * | 2019-09-26 | 2021-03-26 | 上海汽车集团股份有限公司 | Valve train drive device |
| CN112282882A (en) * | 2020-11-30 | 2021-01-29 | 一汽解放汽车有限公司 | Camshaft assembly for controlling engine cylinder valve and vehicle |
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Legal Events
| 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: 20111005 Termination date: 20191116 |
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| CF01 | Termination of patent right due to non-payment of annual fee |