CN104747248A - Engine air distributing device variable in valve timing and lift range - Google Patents
Engine air distributing device variable in valve timing and lift range Download PDFInfo
- Publication number
- CN104747248A CN104747248A CN201510106300.2A CN201510106300A CN104747248A CN 104747248 A CN104747248 A CN 104747248A CN 201510106300 A CN201510106300 A CN 201510106300A CN 104747248 A CN104747248 A CN 104747248A
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- CN
- China
- Prior art keywords
- cam
- cylinder
- lift
- control mechanism
- way cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/08—Shape of cams
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention discloses an engine air distributing device variable in valve timing and lift range. The engine air distributing device comprises a cylinder cover, an air valve, a cam and a control mechanism. The air valve is arranged on the cylinder cover and driven by the cam to move. The cam is connected to the cylinder cover in a rotating mode in the mode that the cam can slide in the axial direction, the height of the protruding part of the cam varies gradually, and projections, in the axial direction of the cam, of the protruding part are not completely overlapped. The control mechanism is connected between the cam and the cylinder cover and used for driving the cam to slide in the axial direction and positioning the cam in the axial direction. Through improving the shape of the cam and the installing structure of the cam, the valve timing and lift range of the engine air valve can be adjusted at the same time without replacing the cam, and the engine air distributing device is simple in structure, good in operation stability and beneficial to lowering the cost.
Description
Technical field
The present invention relates to engine fittings, particularly relate to the engine valve device of variable timing and lift.
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.
Summary of the invention
In view of this, the object of this invention is to provide the engine valve device of a kind of variable timing and lift, 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.
The engine valve device of variable timing of the present invention and lift, comprises 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 invention has the beneficial effects as follows: the engine valve device of variable timing of the present invention and lift, 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 invention;
Fig. 2 is cam structure schematic diagram.
Embodiment
Fig. 1 is structural representation of the present invention, and Fig. 2 is cam structure schematic diagram, as shown in the figure: the variable timing of the present embodiment and the engine valve device of lift, 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 the object of the invention can be realized, 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 invention 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 scope.
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 technological scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technological scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (6)
1. an engine valve device for variable timing and lift, 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. the engine valve device of variable timing according to claim 1 and lift, is characterized in that: the height of described cam lobe part is along camshaft to ascending even variation.
3. the engine valve device of variable timing according to claim 2 and lift, is characterized in that: the convex portion of described cam is around camshaft line structure twist.
4. the engine valve device of variable timing according to claim 3 and lift, 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. the engine valve device of variable timing according to claim 3 and lift, 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. the engine valve device of variable timing according to claim 3 and lift, 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 |
|---|---|---|---|
| CN201510106300.2A CN104747248A (en) | 2015-03-11 | 2015-03-11 | Engine air distributing device variable in valve timing and lift range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510106300.2A CN104747248A (en) | 2015-03-11 | 2015-03-11 | Engine air distributing device variable in valve timing and lift range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104747248A true CN104747248A (en) | 2015-07-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510106300.2A Pending CN104747248A (en) | 2015-03-11 | 2015-03-11 | Engine air distributing device variable in valve timing and lift range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104747248A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006896A (en) * | 2019-12-21 | 2021-06-22 | 浙江知嘛网络科技有限公司 | Adjustable forklift valve camshaft |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133625A (en) * | 1993-09-15 | 1996-10-16 | 莫蒂夫控股有限公司 | Variable valve lift mechanism for internal combustion engine |
| US6112711A (en) * | 1996-11-18 | 2000-09-05 | Toyota Jidosha Kabushiki Kaisha | Valve performance control apparatus for internal combustion engines |
| CN101368517A (en) * | 2008-08-13 | 2009-02-18 | 奇瑞汽车股份有限公司 | Engine braking device and method |
| EP2478191A1 (en) * | 2009-09-16 | 2012-07-25 | Thyssenkrupp Presta Teccenter Ag | Camshaft with variable valve opening period |
| CN102606244A (en) * | 2012-04-01 | 2012-07-25 | 江门市硕普科技开发有限公司 | Mechanical type continuously variable valve mechanism of engine |
| CN103953414A (en) * | 2014-05-12 | 2014-07-30 | 重庆交通大学 | Variable timing system of engine valve |
| CN204532453U (en) * | 2015-03-11 | 2015-08-05 | 重庆交通大学 | engine valve variable timing and lift control system |
-
2015
- 2015-03-11 CN CN201510106300.2A patent/CN104747248A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133625A (en) * | 1993-09-15 | 1996-10-16 | 莫蒂夫控股有限公司 | Variable valve lift mechanism for internal combustion engine |
| US6112711A (en) * | 1996-11-18 | 2000-09-05 | Toyota Jidosha Kabushiki Kaisha | Valve performance control apparatus for internal combustion engines |
| CN101368517A (en) * | 2008-08-13 | 2009-02-18 | 奇瑞汽车股份有限公司 | Engine braking device and method |
| EP2478191A1 (en) * | 2009-09-16 | 2012-07-25 | Thyssenkrupp Presta Teccenter Ag | Camshaft with variable valve opening period |
| CN102606244A (en) * | 2012-04-01 | 2012-07-25 | 江门市硕普科技开发有限公司 | Mechanical type continuously variable valve mechanism of engine |
| CN103953414A (en) * | 2014-05-12 | 2014-07-30 | 重庆交通大学 | Variable timing system of engine valve |
| CN204532453U (en) * | 2015-03-11 | 2015-08-05 | 重庆交通大学 | engine valve variable timing and lift control system |
Non-Patent Citations (2)
| Title |
|---|
| 宋丽敏: "《汽油发动机电控系统检修（第1版）》", 30 September 2013 * |
| 李英娟: "《机动车污染控制技术（第1版）》", 31 December 2014 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006896A (en) * | 2019-12-21 | 2021-06-22 | 浙江知嘛网络科技有限公司 | Adjustable forklift valve camshaft |
| CN113006896B (en) * | 2019-12-21 | 2022-10-18 | 浙江知嘛网络科技有限公司 | Adjustable forklift valve camshaft |
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Application publication date: 20150701 |
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| RJ01 | Rejection of invention patent application after publication |