CN201386576Y - Novel camshaft for engine - Google Patents
Novel camshaft for engine Download PDFInfo
- Publication number
- CN201386576Y CN201386576Y CN200920003459U CN200920003459U CN201386576Y CN 201386576 Y CN201386576 Y CN 201386576Y CN 200920003459 U CN200920003459 U CN 200920003459U CN 200920003459 U CN200920003459 U CN 200920003459U CN 201386576 Y CN201386576 Y CN 201386576Y
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- China
- Prior art keywords
- camshaft
- cam
- engine
- speed
- valve
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- Expired - Fee Related
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- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model discloses a novel camshaft of an engine valve train, which can enable an air valve to automatically lift with the increase of the speed of an engine. The camshaft is divided into two sections (1, 2) which are connected together through sliding keys. A cam (4) arranged on the camshaft (2) is specially processed. A pressure bearing is installed at the end of the camshaft (2). A valve arm (6) is arranged at the lowest position of the trapezoidal cam (4). A hydraulic pump (7) and a hydraulic tank (8) are installed on the flywheel of the engine. A hydraulic piston (10) is installed on a cylinder body at the end of the camshaft (2). When the engine is in an idle state, the hydraulic pump (7) has no power and the valve arm (6) is at the lowest position of the trapezoidal cam (4). When the speed of the engine is increased, the power of the hydraulic pump is increased, the hydraulic piston (10), the bearing (5) and the camshaft (2) are driven to move forward, and the valve arm gradually slides to the high position of the cam (4). Thereby, as the speed of the engine is increased, the lift of the air valve is increased until the lift reaches the highest position.
Description
One, affiliated technical field
The utility model is a kind of engine power that improves, and a kind of engine fittings of fuel saving improve the structure of camshaft exactly, allows the air valve of motor, the lift along with the raising of engine speed, and the rotating speed of motor is high more, and the lift of air valve is high more.
Two, background technique
The valve lift of the camshaft that present most motor adopted is fixed, and motor is at low speed with when running up, and the lift of air valve is equally high.When time of engine low speed, the opening time of air valve is longer relatively, and the mixed gas that enters in the cylinder is more, and mixture combustion is not intact during outburst, and unnecessary mixed gas has been arranged, waste fuel.When high engine speeds turned round, the opening time of air valve was shorter relatively, and the mixed gas that enters in the cylinder is less, and the explosive force of motor reduces, and has influenced the power of motor.
But Japan's " Honda V-TEC " motor car engine has adopted the variable valve timing control mechanism, two kinds of cams is housed, " being High speed cam and Lower speed cam " on the camshaft of " Honda V-TEC " motor.When the rotating speed of motor car engine is no more than 6000 commentaries on classics/min, motor drives air valve with Lower speed cam and opens and closes, when rotating speed of automobile engine meets or exceeds 6000 commentaries on classics/min, motor automatically switches into High speed cam and drives the air valve switching, certainly the lift of High speed cam is higher, has so just formed the different lifts of high and low air valve.
" Honda V-TEC engine variable valve timing control mechanism also has not enough point: 1, have only high-grade automobile just to possess the computer control mechanism, therefore " " the variable valve timing control mechanism of motor is not adopted by most of low and middle-grade motors Honda V-TEC.
2, " " when engine speed met or exceeded 6000 commentaries on classics/min, motor could switch to Lower speed cam on the High speed cam Honda V-TEC automatically, and unexpected switching makes the motor can not smooth transition.
3, the complex structure of " Honda V-TEC " engine variable valve timing control mechanism, newly-increased accessory is many, cost up.
Three, summary of the invention
The purpose of this utility model provides a kind of novel engine distribution device." camshaft of trapezoidal cam ", this " camshaft of trapezoidal cam ".Can make the motor fuel saving, increase power, the unlatching of its purpose air valve along with the raising of engine speed also increases, and when engine speed peaked, the unlatching of air valve also was raised to peak thereupon.
For reaching above purpose, cam on the camshaft of motor is widened, and be processed into trapezoidal cam, become the inclined-plane from low to high, when engine idle, the engine air valve rocker arm is in the bottom surface of trapezoidal cam, when engine speed improves, the rocking arm of motor air valve slides to high face gradually from the bottom surface of trapezoidal cam, up to highest point.The surface of contact of rocking arm and trapezoidal cam will match.Trapezoidal camshaft is made up of two-section, and they connect in the mode of slide key, and there is a return spring centre.
This overlaps distribution device by the two-section camshaft, corresponding valve arm, and oil hydraulic pump, hydraulic fluid tank, hydraulic tube, hydraulic piston, pressure bearing are formed.
When engine idle, because oil hydraulic pump does not have pressure, valve arm is in the bottom surface of trapezoidal cam, the lift of air valve is minimum, raising when engine speed, the increase of oil hydraulic pump pressure, hydraulic oil promotes hydraulic piston by oil pipe, and hydraulic piston promotes to be equipped with the trapezoidal cam the tip of the axis of pressure bearing, and back half camshaft is moved ahead along slide key, valve arm slides to high-end from the least significant end of trapezoidal cam ramp gradually, to reach the lift of motor air valve, engine speed is high more, and the pressure of oil hydraulic pump is big more, the lift of motor air valve is just high more, up to highest point.So just finished enhancing power, fuel saving, the purpose of raising the efficiency.
Four, description of drawings:
Figure (1) is the implementation and operation figure of one group of cam
Figure (2) is the plan view of trapezoidal camshaft
Figure (3) is the sectional view of figure (2)
Wherein: 1, preceding half camshaft; 2, back half camshaft; 3, return spring; 4, new type of cam; 5, pressure bearing; 6, valve arm; 7, oil hydraulic pump; 8, hydraulic fluid tank; 9, hydraulic tube; 10, hydraulic piston.
Five, embodiment
Shown in figure (1), the new type of cam axle is made up of two sections camshafts (1) (2) and Power Component.Camshaft (1) (2) connects with slide key, and it is the trapezoidal cam of widening that there is the cam (4) above return spring (3) camshaft (2) centre.Camshaft (2) end is adorned the lowest surfaces that a matched pressure bearing (5) valve arm (6) is in trapezoidal cam (4), adorns on the cylinder body of end that a hydraulic fluid tank (8) hydraulic piston (10) is contained in camshaft (2) in suitable place and echoes mutually with pressure bearing (5) adorning an oil hydraulic pump (7) on the engine flywheel.
When using the utility model camshaft, shown in figure (1), when motor during at idling conditions, the rotating speed of flywheel is very low, oil hydraulic pump (7) is unpowered, valve arm (6) is in the lowest surfaces of trapezoidal cam (4), when motor quickened, the rotating speed of flywheel improved, and the pressure of oil hydraulic pump (5) increases, hydraulic oil by hydraulic tube (9) promote hydraulic piston (10) more terminal pressure bearing (5) camshaft (2) of actuating cam axle (2) be pushed and move ahead, valve arm, (6) slide to high face gradually from the lowest surfaces of trapezoidal cam (4), along with engine speed constantly increases, the lift of air valve is also just more and more higher, till peak.
Hydraulic pressure installation also can be contained in engine interior.
Claims (3)
1, a kind of a kind of new type of cam axle that is used to improve engine power, form by two sections camshafts (1) (2) and Power Component:
It is characterized in that: two sections camshafts (1) (2) connect with slide key, cam above the camshaft (2) is that the end that passes through trapezoidal cam (4) camshaft of widening (2) is equipped with the lowest surfaces that pressure bearing (5) valve arm (6) is in cam (4), oil hydraulic pump (7) is housed on engine flywheel, and adorns on the terminal cylinder body that a hydraulic fluid tank (8) hydraulic piston (10) is contained in camshaft (2) and contact with pressure bearing (5).
2, its feature of new type of cam axle according to claim 1 (2): be that the top cam of camshaft (2) is the trapezoid shaped cam after widening.
3, the end of new type of cam axle according to claim 1 (2) is equipped with its feature of bearing (5): be that bearing (5) is a pressure bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920003459U CN201386576Y (en) | 2009-02-13 | 2009-02-13 | Novel camshaft for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920003459U CN201386576Y (en) | 2009-02-13 | 2009-02-13 | Novel camshaft for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201386576Y true CN201386576Y (en) | 2010-01-20 |
Family
ID=41579109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920003459U Expired - Fee Related CN201386576Y (en) | 2009-02-13 | 2009-02-13 | Novel camshaft for engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201386576Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057904A (en) * | 2018-08-10 | 2018-12-21 | 东北石油大学 | A kind of Valve Train of Vehicle Engine based on VVT |
-
2009
- 2009-02-13 CN CN200920003459U patent/CN201386576Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057904A (en) * | 2018-08-10 | 2018-12-21 | 东北石油大学 | A kind of Valve Train of Vehicle Engine based on VVT |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Wang Guangyao Document name: Notification to Pay the Fees |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20110213 |