CN102400729A - Engine valve lift variable mechanism - Google Patents
Engine valve lift variable mechanism Download PDFInfo
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- CN102400729A CN102400729A CN2011103612523A CN201110361252A CN102400729A CN 102400729 A CN102400729 A CN 102400729A CN 2011103612523 A CN2011103612523 A CN 2011103612523A CN 201110361252 A CN201110361252 A CN 201110361252A CN 102400729 A CN102400729 A CN 102400729A
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- intake cam
- speed intake
- high speed
- low speed
- camshaft
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Abstract
The invention relates to an engine valve lift variable mechanism. A high-speed air inlet cam and a low-speed air inlet cam control the opening and closing of an air inlet valve through the same valve rocker arm; and a high-speed and low-speed air inlet cam switching control mechanism is arranged on a camshaft. The high-speed air inlet cam and the low-speed air inlet cam control the opening and closing of the air inlet valve through the same valve rocker arm, so the number of the valve rocker arm is reduced, the rotating inertia and damping loss of the valve rocker arm are reduced, and the switching reliability of the high-speed air inlet cam and the low-speed air inlet cam is improved.
Description
Technical field
The present invention relates to a kind of engine air valve lift changeable mechanism, it makes the lift amount of engine intake valve under the motor different rotating speeds, mate suitable valve lift.
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 object of the present invention is to provide a kind of engine air valve lift changeable mechanism; High speed intake cam and low speed intake cam are through the switching of same valve rocker control intake valve; rocking arm rotary inertia and damping loss are little, and it is high to switch reliability, and have improved the pervasive performance of power of motor.
To achieve these goals; The present invention proposes a kind of engine air valve lift changeable mechanism; According to a first aspect of the invention; It is characterized in that: high speed intake cam and low speed intake cam are through the switching of same valve rocker control intake valve, and the side near the high speed intake cam on the valve rocker is provided with rocking arm importing inclined-plane, and camshaft is provided with high, low speed intake cam switching controls mechanism.
Second aspect of the present invention, on the basis of first aspect, said high, low speed intake cam switching controls mechanism 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 third aspect of the invention, first or the basis of second aspect on, said high speed intake cam imports the inclined-plane being provided with the high speed intake cam its one week of top near valve rocker one side.
Fourth aspect of the present invention, first or the basis of second aspect on, said high speed intake cam is installed on the camshaft through axle sleeve.
According to first aspect present invention; Can obtain following effect: high speed intake cam and low speed intake cam are through the switching of same valve rocker control intake valve; Reduced the quantity of valve rocker; Reduce the rotary inertia and the damping loss of valve rocker, improved the reliability that the high, low speed intake cam switches.
According to second aspect present invention, import the inclined-plane through the high, low speed intake cam switching controls mechanism that is arranged on the camshaft with the rocking arm that is arranged on the valve rocker, can effectively realize the switching of high, low speed intake cam, reliability is high.
According to third aspect present invention, import the inclined-plane owing on the high speed intake cam, be provided with the high speed intake cam, can make switching controls mechanism more steady when the high, low speed intake cam switches each other.
According to fourth aspect present invention, 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 high, low speed intake cam of the present invention switches;
Fig. 4 is that high, low speed intake cam of the present invention switches ongoing working state figure;
Fig. 5 is that high, low speed intake cam of the present invention 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 intake 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 engine air valve lift changeable mechanism of the present invention.
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 is under centrifugal action; Begin to direction deflection, simultaneously, promote finger 7 through driving lever 8 and move to the direction of high speed intake cam 2 away from timing sprocket 5; 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 (4)
1. engine air valve lift changeable mechanism; It is characterized in that: high speed intake cam (2) and the switching of low speed intake cam (3) through same valve rocker (1) control intake valve; The side that valve rocker (1) is gone up near high speed intake cam (2) is provided with rocking arm importing inclined-plane (10), and camshaft (4) is provided with high, low speed intake cam switching controls mechanism.
2. a kind of engine air valve lift changeable mechanism according to claim 1 is characterized in that: said high, low speed intake cam switching controls mechanism 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).
3. a kind of engine air valve lift changeable mechanism according to claim 1 and 2 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.
4. a kind of engine air valve lift changeable mechanism 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 |
|---|---|---|---|
| CN2011103612523A CN102400729A (en) | 2011-11-15 | 2011-11-15 | Engine valve lift variable mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103612523A CN102400729A (en) | 2011-11-15 | 2011-11-15 | Engine valve lift variable mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102400729A true CN102400729A (en) | 2012-04-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103612523A Pending CN102400729A (en) | 2011-11-15 | 2011-11-15 | Engine valve lift variable mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102400729A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4228901A1 (en) * | 1992-08-29 | 1994-03-03 | Zbigniew Kacprzak | Variable control for IC engine valves - has axially slidable camshaft with conical cams and includes tilting lever with rotary parts. |
| JPH07332050A (en) * | 1994-06-01 | 1995-12-19 | Yutaka Tanaka | Device for automatically changing valve timing and valve lift amount of internal combustion engine |
| CN1834410A (en) * | 2006-04-14 | 2006-09-20 | 江门市硕普科技开发有限公司 | Self-adaptive air valve phaser of engine |
| CN101316986A (en) * | 2005-11-28 | 2008-12-03 | 雅马哈发动机株式会社 | Adjustable valve device, and engine device and vehicle using the same |
| CN202348365U (en) * | 2011-11-15 | 2012-07-25 | 中国嘉陵工业股份有限公司（集团） | Engine valve lift variable mechanism |
-
2011
- 2011-11-15 CN CN2011103612523A patent/CN102400729A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4228901A1 (en) * | 1992-08-29 | 1994-03-03 | Zbigniew Kacprzak | Variable control for IC engine valves - has axially slidable camshaft with conical cams and includes tilting lever with rotary parts. |
| JPH07332050A (en) * | 1994-06-01 | 1995-12-19 | Yutaka Tanaka | Device for automatically changing valve timing and valve lift amount of internal combustion engine |
| CN101316986A (en) * | 2005-11-28 | 2008-12-03 | 雅马哈发动机株式会社 | Adjustable valve device, and engine device and vehicle using the same |
| CN1834410A (en) * | 2006-04-14 | 2006-09-20 | 江门市硕普科技开发有限公司 | Self-adaptive air valve phaser of engine |
| CN202348365U (en) * | 2011-11-15 | 2012-07-25 | 中国嘉陵工业股份有限公司（集团） | Engine valve lift variable mechanism |
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Application publication date: 20120404 |