CN109779715B - Variable gas distribution timing-lift device and control method thereof - Google Patents
Variable gas distribution timing-lift device and control method thereof Download PDFInfo
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- CN109779715B CN109779715B CN201910141286.8A CN201910141286A CN109779715B CN 109779715 B CN109779715 B CN 109779715B CN 201910141286 A CN201910141286 A CN 201910141286A CN 109779715 B CN109779715 B CN 109779715B
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Abstract
The invention discloses a variable valve timing-lift device, comprising: the rocker arm assembly comprises a rocker arm and a rocker arm shaft, and the middle part of the rocker arm is arranged on the rocker arm shaft and rotates up and down around the rocker arm shaft; the valve assembly is arranged at one end of the rocker arm and comprises a spring seat fixed on the cylinder cover and a valve penetrating through the spring seat, the valve comprises a valve upright post, a valve cover and a connecting seat fixed on the valve upright post, an extension spring is arranged between the spring seat and the connecting seat, the upper end of the extension spring is fixedly connected with the spring seat, and the lower end of the extension spring is fixedly connected with the connecting seat; set up in the spiral line wheel subassembly of the rocking arm other end, spiral line wheel subassembly includes the spiral line axle and sets up in the epaxial spiral line wheel of spiral line wheel, and the other end of rocking arm is laminated on the screw thread of spiral line wheel and is followed screw thread removal. The device has simple structure and convenient operation, and can flexibly change the motion state of the air valve according to various working conditions so as to find the most reasonable working state and working mode of the engine and improve the heat efficiency of the internal combustion engine.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a variable gas distribution timing-lift device and a control method thereof.
Background
During the working process of the engine, when the piston descends from the top dead center to the bottom dead center in an intake stroke, the piston is opened, the exhaust valve is closed, when the piston finishes the first stroke, the piston goes from bottom to top, the compression stroke is called when the piston reaches the top dead center, the intake valve and the exhaust valve are closed, then the piston can continuously descend to the bottom dead center, the power stroke is called, the valve is still closed, when the power stroke is finished, the piston ascends to the top dead center and is called as an exhaust stroke, the intake valve is closed, and the exhaust valve is opened. Since it is considered that the valve does not have time to open and close at the time of high-speed operation of the engine, the opening and closing times of the valve are advanced and retarded by various manufacturers' different mechanical techniques throughout the stroke.
The camshaft is a component in a piston engine and functions to control the opening and closing action of the valves. Although the rotational speed of the camshaft is half of that of the crankshaft in a four-stroke engine (the rotational speed of the camshaft is the same as that of the crankshaft in a two-stroke engine), the rotational speed is still high and the camshaft is subjected to a large torque, so that the camshaft is required to be high in strength and support in design, and the camshaft is generally made of high-quality alloy steel or alloy steel. Because the valve motion law is related to the power and the running characteristics of an engine, the camshaft design occupies a very important position in the design process of the engine. However, the existing engine can not flexibly adjust the opening and closing time and the motion state of the valve according to various working conditions, which not only causes lower thermal efficiency of the internal combustion engine, but also causes waste of energy and environmental pollution.
Disclosure of Invention
The invention provides a variable valve timing-lift device for overcoming the defects of the prior art, which has simple structure and convenient operation, can flexibly change the motion state of an engine valve according to various working conditions so as to seek the most reasonable working state and working mode of the engine and realize the improvement of the thermal efficiency of an internal combustion engine.
The invention also provides a control method of the variable gas distribution timing-lift device and an engine comprising the variable gas distribution timing-lift device.
The technical scheme adopted by the invention for overcoming the technical problems is as follows:
a variable valve timing-lift apparatus comprising:
the rocker arm assembly comprises a rocker arm and a rocker arm shaft, and the middle part of the rocker arm is arranged on the rocker arm shaft and rotates up and down around the rocker arm shaft;
the valve assembly is arranged at one end of the rocker arm and comprises a spring seat fixed on the cylinder cover and a valve penetrating through the spring seat, the valve comprises a valve upright post, a valve cover and a connecting seat fixed on the valve upright post, an extension spring is arranged between the spring seat and the connecting seat, the upper end of the extension spring is fixedly connected with the spring seat, and the lower end of the extension spring is fixedly connected with the connecting seat; and the number of the first and second groups,
set up in the spiral wheel subassembly of the rocking arm other end, the spiral wheel subassembly includes the spiral wheel axle and sets up in the epaxial spiral wheel of spiral wheel, and the other end of rocking arm is laminated on the screw thread of spiral wheel and is followed screw thread removal.
Further, the one end of rocking arm and the laminating of helix wheel sets up to the spheroid, and the purpose is in order to make the laminating of rocking arm and helix wheel compacter, more is favorable to the rocking arm to remove on the helix wheel.
Furthermore, the spiral wheel is connected with the spiral wheel shaft through a key, so that the synchronous rotation of the spiral wheel and the spiral wheel shaft is realized.
Further, still including locating the helical gear below and being used for adjusting the adjustable subassembly of helical gear height, adjustable subassembly includes movable axle bed, fixed axle bed and screw rod, and movable axle bed hugs closely the lower extreme of helical gear and overlaps and locates on the helical gear is epaxial, and fixed axle bed is located the below of movable axle bed and overlaps and locate on the helical gear is epaxial, and movable axle bed and fixed axle bed are gone up to overlap respectively and are equipped with an axle bed lantern ring, the screw rod passes two axle bed lantern rings in proper order and respectively with two axle bed lantern ring threaded connection.
Furthermore, each shaft seat lantern ring comprises a large round hole and a small round hole, wherein the large round hole is used for sleeving the movable shaft seat or the fixed shaft seat, and the small round hole is used for being in threaded connection with the screw.
Furthermore, the thread on the spiral wheel is a thread protruding out of the outer surface of the spiral wheel or a thread recessed into the outer surface of the spiral wheel, and no matter the thread is the protruding thread or the recessed thread, the rocker arm can move on the spiral wheel along the thread smoothly as long as the rocker arm can be ensured.
The invention also provides a control method based on the variable gas distribution timing-lift device, which drives the spiral wheel to convert the rotation of the spiral wheel around the spiral shaft into the vertical reciprocating motion of the rocker arm by driving the spiral shaft, so as to drive the valve to open and close according to the expected frequency.
Further, the method specifically comprises the following steps:
under the drive of the spiral wheel, one end of the rocker arm, which is attached to the spiral wheel, moves upwards to stretch the extension spring, and the valve is opened;
when the end, attached to the spiral wheel, of the rocker arm reaches the highest point, the end, attached to the spiral wheel, of the rocker arm rapidly falls to the lowest end of the spiral wheel under the action of the stretching force of the stretching spring, and the valve is closed;
and performing cyclic reciprocating motion according to the steps to realize the opening and closing of the valve.
The invention also provides an engine which comprises the variable valve timing-lift device.
The invention has the beneficial effects that:
the variable valve timing-lift device has simple structure and convenient operation, and can flexibly change the motion state of the engine valve according to various working conditions so as to seek the most reasonable working state and working mode of the engine and realize the improvement of the thermal efficiency of the internal combustion engine. Through the reasonable regulation to the air inlet activity, can improve the efficiency of admitting air to make the gas-oil mixture mix more fully, more reasonable, the burning is rapider, more even, and then has realized the further control to fuel consumption, reaches resources are saved, environmental protection's purpose.
Drawings
Fig. 1 is a schematic front view of a variable valve timing-lift apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a back structure of the variable valve timing-lift apparatus according to the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the shaft seat collar according to the embodiment of the invention.
In the figure, 1, rocker arms, 2, rocker arm shafts, 3, helical gears, 4, helical gear shafts, 5, keys, 6, movable shaft seats, 7, screws, 8, fixed shaft seats, 9, shaft seat lantern rings, 10, valves, 11, extension springs, 12, spring seats, 13, valve stand columns, 14, valve covers, 15 and connecting seats.
Detailed Description
In order to facilitate a better understanding of the invention for those skilled in the art, the invention will be described in further detail with reference to the accompanying drawings and specific examples, which are given by way of illustration only and do not limit the scope of the invention.
As shown in fig. 1 and 2, the variable valve timing-lift apparatus according to the present embodiment includes: a rocker arm assembly, a valve assembly, and a solenoid assembly. The rocker arm assembly comprises a rocker arm 1 and a rocker arm shaft 2, and the middle part of the rocker arm 1 is arranged on the rocker arm shaft 2 and rotates up and down around the rocker arm shaft 2. The valve assembly is arranged at one end of the rocker arm 1 and comprises a spring seat 12 fixed on a cylinder cover and a valve 10 penetrating through the spring seat, the valve 10 comprises a valve upright post 13, a valve cover 14 and a connecting seat 15 fixed on the valve upright post 13, a tension spring 11 is arranged between the spring seat 12 and the connecting seat 15, the upper end of the tension spring 11 is fixedly connected with the spring seat 12, the lower end of the tension spring 11 is fixedly connected with the connecting seat 15, and when the tension spring 11 does not bear load, a gap is generally formed between a ring and a ring. The spiral wheel subassembly sets up in the other end of rocking arm 1, includes spiral shaft 4 and sets up spiral wheel 3 on spiral shaft 4, furtherly, spiral wheel 3 is connected through key 5 and spiral shaft 4 and drives spiral wheel 3 and rotate in order to reach spiral shaft 4 pivoted, and the other end of rocking arm 1 laminates on spiral wheel 3's screw thread and along the screw thread removal, and this embodiment is preferred, the one end of rocking arm 1 and the laminating of spiral wheel 3 sets up to the spheroid, and the purpose is compacter for making the laminating of rocking arm 1 and spiral wheel 3, more is favorable to rocking arm 1 to remove on spiral wheel 3.
The variable distribution timing-lift device of this embodiment, still including locating the adjustable subassembly of 3 below of helical gear and being used for adjusting the helical gear 3 height, adjustable subassembly includes movable axle bed 6, fixed axle bed 8 and screw rod 7, and movable axle bed 6 hugs closely the lower extreme of helical gear 3 and overlaps and locate on helical gear axle 4, and fixed axle bed 8 is located movable axle bed 6's below and overlaps and locate on helical gear axle 4, is equipped with an axle bed lantern ring 9 on movable axle bed 6 and the fixed axle bed 8 respectively, screw rod 7 passes two axle bed lantern rings 9 in proper order and respectively with two axle bed lantern ring threaded connection, the preferred every axle bed lantern ring 9 of this embodiment includes a big round hole that is used for overlapping movable axle bed 6 or fixed axle bed 8 and a small circle hole that is used for with screw rod 7 threaded connection, as shown in fig. 3. The working principle of the adjustable component is as follows: the fixed shaft seat 8 is fixed on the screw shaft 4, the upper and lower positions of the movable shaft seat 6 are adjusted by rotating the screw 7, and the spiral wheel 3 is fixed by the movable shaft seat 6 closely attached to the lower end, so that when the upper and lower positions of the movable shaft seat 6 are changed, the upper and lower positions of the spiral wheel 3 are changed, the motion state of the engine valve is flexibly changed according to various actual working conditions, and the most suitable working state and working mode of the engine are found.
In this embodiment, the thread on the spiral wheel 3 is a thread protruding from the outer surface of the spiral wheel, or a thread recessed from the outer surface of the spiral wheel, and no matter the thread is a protruding thread or a recessed thread, it is sufficient to ensure that the rocker arm 1 moves smoothly along the thread on the spiral wheel 3.
The embodiment also provides a control method based on the variable valve timing-lift device, the crankshaft on the engine drives the spiral shaft 4 to drive the spiral wheel 3 to convert the rotation of the spiral wheel around the spiral shaft into the vertical reciprocating motion of the rocker arm 1, and therefore the valve 10 is driven to be opened and closed according to expected frequency.
Further, the method specifically comprises the following steps:
under the drive of the spiral wheel 3, one end of the rocker arm 1, which is attached to the spiral wheel, moves upwards, so that the valve 10 integrally moves downwards, and as the lower end of the extension spring 11 is fixedly connected to the connecting seat 15 fixed on the valve upright post 13 and the upper end of the extension spring is fixedly connected to the spring seat 12 fixed on the cylinder cover, the extension spring 11 is stretched, and the valve is opened, specifically, the valve cover 14 is opened.
When the end of the rocker arm 1 attached to the spiral wheel reaches the highest point, the end of the rocker arm 1 attached to the spiral wheel falls down to the lowest end of the spiral wheel 3 rapidly under the action of the stretching force of the stretching spring 11, the stretching spring 11 returns to the original state, and the valve is closed, specifically, the valve cover 14 is closed.
And performing cyclic reciprocating motion according to the steps to realize the opening and closing of the valve.
The invention also provides an engine which comprises the variable valve timing-lift device.
The foregoing merely illustrates the principles and preferred embodiments of the invention and many variations and modifications may be made by those skilled in the art in light of the foregoing description, which are within the scope of the invention.
Claims (8)
1. A variable valve timing-lift apparatus, comprising:
the rocker arm assembly comprises a rocker arm (1) and a rocker arm shaft (2), and the middle part of the rocker arm (1) is arranged on the rocker arm shaft (2) and rotates up and down around the rocker arm shaft (2);
the valve assembly is arranged at one end of the rocker arm (1), the valve assembly comprises a spring seat (12) fixed on a cylinder cover and a valve (10) penetrating through the spring seat, the valve (10) comprises a valve upright post (13), a valve cover (14) and a connecting seat (15) fixed on the valve upright post (13), a tension spring (11) is arranged between the spring seat (12) and the connecting seat (15), the upper end of the tension spring (11) is fixedly connected with the spring seat (12), and the lower end of the tension spring is fixedly connected with the connecting seat (15);
the spiral wheel assembly is arranged at the other end of the rocker arm (1), the spiral wheel assembly comprises a spiral wheel shaft (4) and a spiral wheel (3) arranged on the spiral wheel shaft (4), and the other end of the rocker arm (1) is attached to the thread of the spiral wheel (3) and moves along the thread; and the number of the first and second groups,
locate helix wheel (3) below and be used for adjusting the adjustable subassembly of helix wheel height, adjustable subassembly includes movable axle bed (6), fixed axle bed (8) and screw rod (7), and movable axle bed (6) are hugged closely the lower extreme of helix wheel (3) and are overlapped and locate on helix axle (4), and fixed axle bed (8) are located the below of movable axle bed (6) and are overlapped and locate on helix axle (4), and movable axle bed (6) and fixed axle bed (8) are gone up and are overlapped respectively and are equipped with an axle bed lantern ring (9), screw rod (7) pass two axle bed lantern rings (9) in proper order and respectively with two axle bed lantern ring threaded connection.
2. The variable valve timing-lift apparatus according to claim 1, wherein one end of the rocker arm (1) abutting the spiral wheel (3) is provided in a spherical shape.
3. Variable valve timing-lift arrangement according to claim 1 or 2, characterized in that the spiral (3) is connected with the spiral shaft (4) by means of a key (5).
4. A variable valve timing-lift apparatus according to claim 3, wherein each shaft seat collar (9) comprises a large circular hole for housing the movable shaft seat (6) or the fixed shaft seat (8) and a small circular hole for screw-coupling with the screw (7).
5. The variable valve timing-lift apparatus according to claim 1, wherein the thread on the spiral wheel (3) is a thread protruded from the outer surface of the spiral wheel or a thread recessed in the outer surface of the spiral wheel.
6. A control method of a variable valve timing-lift apparatus according to any one of claims 1 to 5, comprising: the spiral shaft (4) is driven to drive the spiral wheel (3) to convert the rotation of the spiral wheel around the spiral shaft into the vertical reciprocating motion of the rocker arm (1), so that the valve (10) is driven to be opened and closed according to expected frequency.
7. The control method according to claim 6, characterized by comprising in particular the steps of:
under the drive of the spiral wheel (3), one end of the rocker arm (1) which is attached to the spiral wheel moves upwards, the extension spring (11) is extended, and the valve is opened;
when the end, attached to the spiral wheel, of the rocker arm (1) reaches the highest point, the end, attached to the spiral wheel, of the rocker arm (1) rapidly falls to the lowest end of the spiral wheel (3) under the action of the stretching force of the stretching spring (11), and the valve is closed;
and performing cyclic reciprocating motion according to the steps to realize the opening and closing of the valve.
8. An engine characterized by comprising the variable valve timing-lift apparatus according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910141286.8A CN109779715B (en) | 2019-02-26 | 2019-02-26 | Variable gas distribution timing-lift device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910141286.8A CN109779715B (en) | 2019-02-26 | 2019-02-26 | Variable gas distribution timing-lift device and control method thereof |
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| Publication Number | Publication Date |
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| CN109779715A CN109779715A (en) | 2019-05-21 |
| CN109779715B true CN109779715B (en) | 2020-01-17 |
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| CN201910141286.8A Active CN109779715B (en) | 2019-02-26 | 2019-02-26 | Variable gas distribution timing-lift device and control method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003343224A (en) * | 2002-05-27 | 2003-12-03 | Kyowa Metal Work Co Ltd | Variable valve train of internal combustion engine |
| CN102400733A (en) * | 2010-09-07 | 2012-04-04 | 本田技研工业株式会社 | Variable Air Valve System For Combustion Motor |
| CN103670579A (en) * | 2013-11-29 | 2014-03-26 | 长城汽车股份有限公司 | Mechanism for continuously adjusting engine valve lift |
| CN103711541A (en) * | 2012-09-28 | 2014-04-09 | 本田技研工业株式会社 | Variable valve of internal combustion engine |
| JP2015040508A (en) * | 2013-08-22 | 2015-03-02 | スズキ株式会社 | Variable valve device of internal combustion engine |
| CN106837465A (en) * | 2016-12-30 | 2017-06-13 | 浙江大学 | The engine valve actuating mechanism of stepless variable valve lift |
| WO2017131538A1 (en) * | 2016-01-27 | 2017-08-03 | Gawryś Marek | Spiral drive mechanism, particularly for mechanical vehicles, land and marine machines |
-
2019
- 2019-02-26 CN CN201910141286.8A patent/CN109779715B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003343224A (en) * | 2002-05-27 | 2003-12-03 | Kyowa Metal Work Co Ltd | Variable valve train of internal combustion engine |
| CN102400733A (en) * | 2010-09-07 | 2012-04-04 | 本田技研工业株式会社 | Variable Air Valve System For Combustion Motor |
| CN103711541A (en) * | 2012-09-28 | 2014-04-09 | 本田技研工业株式会社 | Variable valve of internal combustion engine |
| JP2015040508A (en) * | 2013-08-22 | 2015-03-02 | スズキ株式会社 | Variable valve device of internal combustion engine |
| CN103670579A (en) * | 2013-11-29 | 2014-03-26 | 长城汽车股份有限公司 | Mechanism for continuously adjusting engine valve lift |
| WO2017131538A1 (en) * | 2016-01-27 | 2017-08-03 | Gawryś Marek | Spiral drive mechanism, particularly for mechanical vehicles, land and marine machines |
| CN106837465A (en) * | 2016-12-30 | 2017-06-13 | 浙江大学 | The engine valve actuating mechanism of stepless variable valve lift |
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