CN202325720U - Air inlet cam switching device for engine - Google Patents
Air inlet cam switching device for engine Download PDFInfo
- Publication number
- CN202325720U CN202325720U CN2011204515812U CN201120451581U CN202325720U CN 202325720 U CN202325720 U CN 202325720U CN 2011204515812 U CN2011204515812 U CN 2011204515812U CN 201120451581 U CN201120451581 U CN 201120451581U CN 202325720 U CN202325720 U CN 202325720U
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- China
- Prior art keywords
- air inlet
- intake cam
- cam
- speed intake
- high speed
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Abstract
The utility model discloses an air inlet cam switching device for an engine. The air inlet cam switching device comprises a timing chain wheel fixedly arranged at one end of a cam shaft, a low-speed air inlet cam fixedly arranged at the other end of the cam shaft, a high-speed air inlet cam which is arranged between the timing chain wheel and the low-speed air inlet cam and is capable of sliding along the axial direction of the cam shaft, a pull pin and a mass block, wherein one end of the pull pin is connected with the high-speed air inlet cam, and the other end of the pull pin penetrates through the timing chain wheel, and is hinged with a pull rod; the pull pin can slide in the timing chain wheel; and the mass block is fixedly connected with the pull rod. Due to the adoption of the switching device, the high-speed air inlet cam and the low-speed air inlet cam can control an air inlet valve to open and close through the same air valve rocker arm, so that the number of air valve rocker arms is reduced, the rotation inertia and the damping loss of the air valve rocker arm are reduced, and the reliability for switching the high-speed air inlet cam and the low-speed air inlet cam is improved.
Description
Technical field
The utility model relates to a kind of engine charge cam switching device, and its rotating speed according to motor switches high speed intake cam and low speed intake cam each other.Thereby the suitable valve lift of coupling under the motor different rotating speeds.
Technical background
Engine variable-valve correct time and lift technology are widely used on automobile, technology maturation.But for some some industries of specific (special) requirements are arranged, like motorcycle industry, owing to retrained by factors such as cost, structural volume, VVT and lift technology also are not used widely.Even if some application; Realize the open and close controlling of valve mostly with two or more rocking arms; Though changed the air inlet adjustment of motor to a certain extent; But because problems such as big, the high low speed switching of a plurality of rocking arm rotary inertias and damping loss poor reliability, thereby cause the pervasive performance of motor can't obtain the change of essence.
Summary of the invention
In order to solve the problem that big, the high low speed intake cam of a plurality of rocking arm rotary inertias and damping loss in the existing technology switches poor reliability; The purpose of the utility model is to provide a kind of engine charge cam switching device; This COMM communication can make high speed intake cam and low speed intake cam control the switching of intake valve through same valve rocker; rocking arm rotary inertia and damping loss are little, and it is high to switch reliability, and has improved the pervasive performance of power of motor.
To achieve these goals, the utility model provides a kind of engine charge cam switching device, the first aspect according to the utility model comprises: the timing sprocket that is fixedly installed on camshaft one end; Be fixedly installed on the low speed intake cam of the camshaft the other end; Be arranged between timing sprocket and the low speed intake cam can be along camshaft high speed intake cam in axial sliding; One end can slide in timing sprocket with the finger that the high speed intake cam is connected, the other end passes timing sprocket and driving lever is hinged, this finger; The mass block that is fixedly connected with driving lever.
The second aspect of the utility model, on the basis of first aspect, said high speed intake cam is being provided with high speed intake cam importing inclined-plane its one week of top near valve rocker one side.
The third aspect of the utility model, first or the basis of second aspect on, said high speed intake cam is installed on the camshaft through axle sleeve.
According to the utility model first aspect; Can obtain following effect: through this COMM communication; High speed intake cam and low speed intake cam can be through the switchings of same valve rocker control intake valve; Reduce the quantity of valve rocker, reduced the rotary inertia and the damping loss of valve rocker, improved the reliability that the high, low speed intake cam switches.
According to the utility model second aspect, import the inclined-plane owing on the high speed intake cam, be provided with the high speed intake cam, can make this COMM communication more steady when the high, low speed intake cam switches each other.
According to the utility model third aspect, the high speed intake cam is installed on the camshaft through axle sleeve, not only can realize making the in axial sliding function of high speed intake cam at camshaft, and easy for installation, the cam of the different high speed performances of dismounting as required.
Description of drawings
Fig. 1 is the air valve structure figure of traditional combustion engine;
Fig. 2 is the rocking arm and the switching construction figure (before improving) thereof of existing technology;
Fig. 3 is the working state figure before the utility model high, low speed intake cam switches;
Fig. 4 is that the utility model high, low speed intake cam switches ongoing working state figure;
Fig. 5 is that the utility model high, low speed intake cam switches the working state figure after accomplishing.
Description of reference numerals:
1: valve rocker; 2: the high speed intake cam; 3: the low speed intake cam; 4: camshaft;
5: timing sprocket; 6: mass block; 7: finger; 8: driving lever;
9: the high speed intake cam imports the inclined-plane; 10: rocking arm imports the inclined-plane; 11: axle sleeve.
Embodiment
As shown in Figure 1, the switching of traditional combustion engine valve is controlled by a cam, and valve lift can not change.
As shown in Figure 2; The engine air valve lift variset of existing technology; High speed intake cam and low speed intake cam are realized the open and close controlling of intake valve usually through two or more rocking arms; Though changed the air inlet adjustment of motor to a certain extent,, caused the performance of motor can't realize the change of essence because there are problems such as rotary inertia is big, damping is high, high low speed intake cam handoff response is untimely in a plurality of rocking arms.
Fig. 3 to Fig. 5 is the structural drawing of the utility model engine charge cam switching device.
As shown in Figure 3; One end of camshaft 4 is set with timing sprocket 5; The other end is set with low speed intake cam 3; Between timing sprocket 5 and low speed intake cam 3, through axle sleeve 11 high speed intake cam 2 is installed, this high speed intake cam 2 can endwisely slipping along camshaft 4 under the promotion of finger 7 or pulling.
One end of finger 7 is connected with high speed intake cam 2, and it is hinged with driving lever 8 that the other end passes timing sprocket 5, and this finger 7 can slide in timing sprocket 5.Import inclined-plane 9 at high speed intake cam 2 near the high speed intake cam that is provided with in one week of top of a side of valve rocker 1.Valve rocker 1 is provided with rocking arm and imports inclined-plane 10 in its lower end near a side of high speed intake cam 2.
As shown in Figure 3, under the low engine speed state, the intake valve of motor is controlled through valve rocker 1 by low speed intake cam 3, and at this moment, valve rocker 1 contacts with low speed intake cam 3 always, and high speed intake cam 2 is in idling conditions.
As shown in Figure 4, along with the rotating speed of motor improves constantly the also corresponding raising of the rotating speed of timing sprocket 5; Because rotating speed improves, also become big gradually with the mass block 6 suffered centrifugal force of 5 rotations of timing sprocket, like this; Mass block 6 begins to the direction deflection away from timing sprocket 5, simultaneously under centrifugal action; Promote finger 7 through driving lever 8 and move to the direction of high speed air inlet 2, high speed intake cam 2 moves to the direction near low speed intake cam 3 along camshaft 4 under the promotion of finger 7.
Along with the rotating speed of timing sprocket 5 improves constantly, mass block 6 also continues deflection, slides to the direction of low speed intake cam 3 thereby make finger 7 continue to promote high speed intake cams 2.Then, import inclined-plane 9 at the high speed intake cam and import under the guiding on inclined-plane 10 with rocking arm, high speed intake cam 2 begins to contact with valve rocker 1, and at this moment, high speed intake cam 2 is started working, and low speed intake cam 1 is in idling conditions.
As shown in Figure 5, after high speed intake cam 2 gets into fully, to accomplish to the handoff procedure of high speed intake cam 2 by low speed intake cam 3, motor is in running state at a high speed, and its intake valve is controlled through valve rocker 1 by high speed intake cam 2.
Just in time opposite by high speed intake cam 2 to the handoff procedure and the above-mentioned handoff procedure of low speed intake cam 3.
When the rotating speed of motor descends; The rotating speed of timing sprocket 5 also descends accordingly; The centrifugal force that mass block 6 receives also diminishes gradually; Like this, mass block 6 begins to the direction deflection near timing sprocket 5, through driving lever 8 finger 7 pulling high speed intake cam 2 is moved to the direction away from low speed intake cam 3 simultaneously.High speed intake cam 2 under the pulling of finger 7, along camshaft 4 gradually away from low speed intake cam 3, thereby break away from valve rocker 1, low speed intake cam 3 is contacted with valve rocker 1, completion is from the switching of high speed intake cam 2 to low speed intake cam 3.
Claims (3)
1. engine charge cam switching device comprises:
Be fixedly installed on the timing sprocket (5) of camshaft (4) one ends;
Be fixedly installed on the low speed intake cam (3) of camshaft (4) the other end;
Be arranged between timing sprocket (5) and the low speed intake cam (3) can be along camshaft (4) high speed intake cam (2) in axial sliding;
One end is connected with high speed intake cam (2), the other end passes timing sprocket (5) and the hinged finger (7) of driving lever (8), and this finger (7) can slide in timing sprocket (5);
The mass block (6) that is fixedly connected with driving lever (8).
2. a kind of engine charge cam switching device according to claim 1 is characterized in that: said high speed intake cam (2) is being provided with high speed intake cam importing inclined-plane (9) its one week of top near valve rocker (1) one side.
3. a kind of engine charge cam switching device according to claim 1 and 2 is characterized in that: said high speed air inlet protruding (2) wheel is installed on the camshaft (4) through axle sleeve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204515812U CN202325720U (en) | 2011-11-15 | 2011-11-15 | Air inlet cam switching device for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204515812U CN202325720U (en) | 2011-11-15 | 2011-11-15 | Air inlet cam switching device for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202325720U true CN202325720U (en) | 2012-07-11 |
Family
ID=46437703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204515812U Expired - Fee Related CN202325720U (en) | 2011-11-15 | 2011-11-15 | Air inlet cam switching device for engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202325720U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383886A (en) * | 2011-11-15 | 2012-03-21 | 中国嘉陵工业股份有限公司（集团） | Admission cam switching device for engine |
-
2011
- 2011-11-15 CN CN2011204515812U patent/CN202325720U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383886A (en) * | 2011-11-15 | 2012-03-21 | 中国嘉陵工业股份有限公司（集团） | Admission cam switching device for engine |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20171115 |