CN204532453U - engine valve variable timing and lift control system - Google Patents
engine valve variable timing and lift control system Download PDFInfo
- Publication number
- CN204532453U CN204532453U CN201520138004.6U CN201520138004U CN204532453U CN 204532453 U CN204532453 U CN 204532453U CN 201520138004 U CN201520138004 U CN 201520138004U CN 204532453 U CN204532453 U CN 204532453U
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- China
- Prior art keywords
- cam
- cylinder
- cylinder cap
- control system
- engine valve
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Abstract
The utility model discloses a kind of engine valve variable timing and lift control system, comprise cylinder cap, valve, cam and control mechanism; Described valve is located at cylinder cap and is moved by described actuated by cams; Described cam so that mode cylinder cap can be rotationally connected with in axial sliding, the convex portion highly gradient of cam and along camshaft to projection not exclusively overlapping; Described control mechanism is connected between cam and cylinder cap and slides for driving cam is axial and carries out axially locating to cam; Engine valve variable timing of the present utility model and lift control system, by the improvement of cam face and mounting structure thereof, without the need to change cam can realize engine valve assort timing and lift adjusts simultaneously, structure is simple, good operation stability, is beneficial to cost-saving.
Description
Technical field
The utility model relates to engine fittings, particularly relates to engine valve variable timing and lift control system.
Background technique
Engine valve utilizes bent axle power and chain sprocket transmission to realize opening and closing, in intake stroke, enter cylinder oil jetting combustion by piston withdrawing air, gas expansion promotes piston and moves acting generation power, and then discharge gas of combustion, the parameter of measured engine watt level is " discharge capacity ", engine displacement=cylinder capacity × number of cylinders, in theory, cylinder volume is larger, air-breathing is more, output power is larger, but actual conditions are breathing process will be subject to the direct impact of the opening and closing operating mode of valve, variable valve control apparatus of the prior art, when time of engine low speed, the aperture of valve is reduced to provide less combustion gas by the positional distance controlled between bent axle and camshaft, when high engine speeds operates, control gear just recovers valve opening, more combustion gas is provided, realize internal-combustion engine for running economically in this approach, its deficiency is: can not adjust valve timing adjusting valve opening while, reduce valve opening during low speed and also must affect low engine speed power, existing variable valve control apparatus makes engine interior complex structure, user cost increases.
Model utility content
In view of this, the purpose of this utility model is to provide a kind of engine valve variable timing and lift control system, by the improvement of cam face and mounting structure thereof, without the need to change cam can realize engine valve assort timing and lift adjusts simultaneously, structure is simple, good operation stability, is beneficial to cost-saving.
Engine valve variable timing of the present utility model and lift control system, comprise cylinder cap, valve, cam and control mechanism; Described valve is located at cylinder cap and is moved by described actuated by cams; Described cam so that mode cylinder cap can be rotationally connected with in axial sliding, the convex portion highly gradient of cam and along camshaft to projection not exclusively overlapping; Described control mechanism is connected between cam and cylinder cap and slides for driving cam is axial and carries out axially locating to cam;
Further, the height of described cam lobe part is along camshaft to ascending even variation;
Further, the convex portion of described cam is around camshaft line structure twist;
Further, described control mechanism comprises two-way cylinder; The cylinder barrel of described two-way cylinder is fixed on described cylinder cap, and the piston rod of two-way cylinder is connected to cam; The piston rod of two-way cylinder is parallel with camshaft line;
Further, described control mechanism can also be the combination of one-way cylinder and spring; Described one-way cylinder and spring are respectively in camshaft to both sides, and the cylinder barrel of one-way cylinder is fixed on described cylinder cap, and the piston rod of one-way cylinder is connected to cam; The piston rod of one-way cylinder is parallel with camshaft line, and described spring peaks between cam and cylinder cap along camshaft to bullet;
Further, described control mechanism can also be screw pair; The leading screw of described screw pair is parallel with camshaft line and be rotationally connected with cylinder cap around its axis single-degree-of-freedom; The nut of screw pair is connected to cam.
The beneficial effects of the utility model are: engine valve variable timing of the present utility model and lift control system, by the improvement of cam face and mounting structure thereof, without the need to change cam can realize engine valve assort timing and lift adjusts simultaneously, structure is simple, good operation stability, is beneficial to cost-saving.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is cam structure schematic diagram.
Embodiment
Fig. 1 is structural representation of the present utility model, and Fig. 2 is cam structure schematic diagram, as shown in the figure: the engine valve variable timing of the present embodiment and lift control system, comprises cylinder cap 1, valve 2, cam 3 and control mechanism, described valve 2 is located at cylinder cap 1 and by described cam 3 actuation movement, described cam 3 so that mode cylinder cap 1 can be rotationally connected with in axial sliding, the convex portion 3a highly gradient of the cam 3 and projection along cam 3 axis is not exclusively overlapping, described control mechanism is connected to and slides axially for driving cam 3 between cam 3 and cylinder cap 1 and to carry out axially locating to cam 3, cam 3 is rotationally connected with cylinder cap 1 by its wheel shaft 3b and is in transmission connection in engine crankshaft by timing chain and sprocket wheel 7, and then drive rotation by bent axle, sprocket wheel 7 is fixed on the wheel shaft 3b of cam 3 or is connected by spline synchronous axial system with between wheel shaft 3b, make sprocket wheel 7 that wheel shaft 3b and cam 3 can be driven to rotate, all can realize the utility model object, when being connected by spline synchronous axial system between sprocket wheel 7 with wheel shaft 3b, do not hinder sliding axially of wheel shaft 3b and cam 3, now need the positioning device that arranges on cylinder cap 1 for carrying out axially locating to sprocket wheel 7 (not shown, thrust bearing of the prior art is adopted to coordinate supporting structure to realize), be connected by shift fork between control mechanism with cam 3, annular groove is set at the excircle of cam 3 wheel shaft 3b corresponding shift fork, the reliable driving cam 3 of control mechanism is slid axially, does not hinder again the rotation of cam 3, cam 3 convex portion 3a highly gradient and along the incomplete overlap of projection of cam 3 axis refer to the convex portion 3a of cam 3 relative to the protrusion height of cam 3 axis and the convex portion 3a of cam 3 relative to the phase place of cam 3 circumferencial direction all along cam 3 axial direction consecutive variations, therefore after the location of axially different position being carried out to cam 3 by control mechanism, the start-up time of valve 2 and lift can be made to change, realize valve timing and lift is variable, engine valve 2 control system of the present utility model be used for single-cylinder engine or multicylinder engine, and cam 3 Direct driver valve 2 or by rocking arm drive valve 2 move, all within the utility model protection domain.
In the present embodiment, the height of described cam 3 convex portion 3a is along cam 3 axially ascending even variation, and when therefore cam 3 moves in the same direction, the ascending or descending lift adjusting valve 2 gradually of energy, is convenient to control.
In the present embodiment, the convex portion 3a of described cam 3 is around cam 3 axis structure twist; Make the convex portion 3a of cam 3 produce the change of continuous print phase place, the characteristic in conjunction with convex portion 3a highly gradient can the timing of continuous setup valve 2 and lift within the specific limits, can better adapt to engine operating condition, improve power performance and fuel economy.
In the present embodiment, described control mechanism comprises two-way cylinder; The cylinder barrel of described two-way cylinder is fixed on described cylinder cap 1, and the piston rod of two-way cylinder is connected to cam 3; The piston rod of two-way cylinder and cam 3 axis being parallel; The piston rod of two-way cylinder is connected by shift fork with between cam 3, and arrange annular groove at the corresponding shift fork of the excircle of cam 3 wheel shaft 3b, two-way cylinder can slide axially by driving cam 3 reliably, does not hinder again the rotation of cam 3.
In the present embodiment, described control mechanism comprises the combination of one-way cylinder 4 and spring 5; Described one-way cylinder 4 and spring 5 are respectively in the axial both sides of cam 3, and the cylinder barrel of one-way cylinder 4 is fixed on described cylinder cap 1, and the piston rod of one-way cylinder 4 is connected to cam 3; The piston rod of one-way cylinder 4 and cam 3 axis being parallel, described spring 5 peaks between cam 3 and cylinder cap 1 along the axial bullet of cam 3; The elastic force of spring 5 is utilized to reset to cam 3, structure is simple, energy consumption is low, user cost can be reduced, the piston rod of one-way cylinder 4 is connected by shift fork with between cam 3, arrange annular groove at the corresponding shift fork of the excircle of cam 3 wheel shaft 3b, one-way cylinder 4 can slide axially by driving cam 3 reliably, does not hinder again the rotation of cam 3.
In the present embodiment, described control mechanism comprises screw pair; The leading screw of described screw pair and cam 3 axis being parallel are also rotationally connected with cylinder cap 1 around its axis single-degree-of-freedom; The nut of screw pair is connected to cam 3; The nut of screw pair and the wheel shaft 3b of cam 3 connect together, and the wheel shaft 3b of cam 3 is provided with the annular groove for being set with for the nut of screw pair; Driven by servomotor screw turns can be adopted.
Control mechanism also comprises automatic control system, and described automatic control system comprises the displacement transducer 6 for detecting cam 3 axial position being fixed on cylinder cap 1; The signal output part of displacement transducer 6 is connected to vehicle ECU, ECU calculates the phase angle of intake valve 2 and calculates optimal valve 2 start-up time according to engine operating condition and transmit control signal to the driving mechanism of two-way cylinder, one-way cylinder 4 or screw pair, and then driving cam 3 slides axially and carries out axially locating to cam 3, realizes closed loop control; In prior art, other check that the structure at cam 3 phase angle and mode also fall into this patent protection domain.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (6)
1. engine valve variable timing and a lift control system, is characterized in that: comprise cylinder cap, valve, cam and control mechanism; Described valve is located at cylinder cap and is moved by described actuated by cams; Described cam so that mode cylinder cap can be rotationally connected with in axial sliding, the convex portion highly gradient of cam and along camshaft to projection not exclusively overlapping; Described control mechanism is connected between cam and cylinder cap and slides for driving cam is axial and carries out axially locating to cam.
2. engine valve variable timing according to claim 1 and lift control system, is characterized in that: the height of described cam lobe part is along camshaft to ascending even variation.
3. engine valve variable timing according to claim 2 and lift control system, is characterized in that: the convex portion of described cam is around camshaft line structure twist.
4. engine valve variable timing according to claim 3 and lift control system, is characterized in that: described control mechanism comprises two-way cylinder; The cylinder barrel of described two-way cylinder is fixed on described cylinder cap, and the piston rod of two-way cylinder is connected to cam; The piston rod of two-way cylinder is parallel with camshaft line.
5. engine valve variable timing according to claim 3 and lift control system, is characterized in that: described control mechanism comprises the combination of one-way cylinder and spring; Described one-way cylinder and spring are respectively in camshaft to both sides, and the cylinder barrel of one-way cylinder is fixed on described cylinder cap, and the piston rod of one-way cylinder is connected to cam; The piston rod of one-way cylinder is parallel with camshaft line, and described spring peaks between cam and cylinder cap along camshaft to bullet.
6. engine valve variable timing according to claim 3 and lift control system, is characterized in that: described control mechanism comprises screw pair; The leading screw of described screw pair is parallel with camshaft line and be rotationally connected with cylinder cap around its axis single-degree-of-freedom; The nut of screw pair is connected to cam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520138004.6U CN204532453U (en) | 2015-03-11 | 2015-03-11 | engine valve variable timing and lift control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520138004.6U CN204532453U (en) | 2015-03-11 | 2015-03-11 | engine valve variable timing and lift control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204532453U true CN204532453U (en) | 2015-08-05 |
Family
ID=53746471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520138004.6U Expired - Fee Related CN204532453U (en) | 2015-03-11 | 2015-03-11 | engine valve variable timing and lift control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204532453U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747248A (en) * | 2015-03-11 | 2015-07-01 | 重庆交通大学 | Engine air distributing device variable in valve timing and lift range |
-
2015
- 2015-03-11 CN CN201520138004.6U patent/CN204532453U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747248A (en) * | 2015-03-11 | 2015-07-01 | 重庆交通大学 | Engine air distributing device variable in valve timing and lift range |
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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: 20150805 Termination date: 20200311 |