CN109779714B - Engine valve control mechanism - Google Patents
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- CN109779714B CN109779714B CN201910216913.XA CN201910216913A CN109779714B CN 109779714 B CN109779714 B CN 109779714B CN 201910216913 A CN201910216913 A CN 201910216913A CN 109779714 B CN109779714 B CN 109779714B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 102
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 230000001276 controlling effect Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 5
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 173
- 239000010720 hydraulic oil Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Abstract
The invention discloses an engine valve control mechanism, which comprises a valve mechanism, a hydraulic mechanism and an electromagnetic mechanism, wherein the valve mechanism comprises an air pipe, a valve communicated with the air pipe and a valve plunger used for opening and closing the valve, the hydraulic mechanism comprises a high-pressure oil inlet pipe, a high-pressure oil cavity used for pushing the valve plunger and a high-pressure control oil cavity, the top of the valve plunger is arranged in the high-pressure oil cavity, the middle part of the valve plunger is arranged in the high-pressure control oil cavity, the valve is arranged below the valve plunger, the high-pressure oil inlet pipe is respectively communicated with the high-pressure oil cavity and the high-pressure control oil cavity, a high-pressure control channel is arranged between the electromagnetic mechanism and the high-pressure control oil cavity, and the electromagnetic mechanism is used for controlling the communication/blocking between the high-pressure channel and the electromagnetic mechanism. The engine valve control mechanism is simple in structure, stable and reliable in driving of the valve and capable of effectively improving the economic performance of the engine.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an engine valve control mechanism.
Background
Currently, valve variable control techniques mainly include camshaft-based valve control and camshaft-free valve control. Camshaft-less valve actuation eliminates the camshaft and its followers in conventional valve trains of engines, and drives the valves in an electromagnetic, electro-hydraulic, electrical, rotator, or other manner. The existing electromagnetic valve is flexible to control, but has high energy consumption and low reliability and service life of a valve mechanism; the existing electrohydraulic valve control has better reliability, but the response of the valve control is slower, and the structure of the valve mechanism is complex.
There is thus a need for improvements and improvements in the art.
Disclosure of Invention
In view of the above-described shortcomings of the prior art, an object of the present invention is to provide an engine valve control mechanism that is not only simple in structure but also very stable and reliable in the drive control process of the valve.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides an engine valve control mechanism, includes valve mechanism, hydraulic mechanism and electromagnetic mechanism, the valve mechanism includes trachea, intercommunication tracheal valve and is used for the valve plunger of switch valve, hydraulic mechanism includes high-pressure oil pipe, is used for promoting the high-pressure oil pocket and the high-pressure control oil pocket of valve plunger, the top of valve plunger sets up in the high-pressure oil pocket, and the middle part of valve plunger sets up in the high-pressure control oil pocket, the valve sets up in the below of valve plunger, high-pressure oil pipe communicates high-pressure oil pocket and high-pressure control oil pocket respectively, be provided with high-pressure control passageway between electromagnetic mechanism and the high-pressure control oil pocket, be provided with high-pressure passageway between electromagnetic mechanism and the high-pressure oil pocket and control high-pressure passageway through electromagnetic mechanism and electromagnetic mechanism between communicate/block.
In the engine valve control mechanism, the electromagnetic mechanism comprises an adjusting oil cavity, an electromagnetic valve, an electromagnetic spring and an armature, wherein the electromagnetic valve, the electromagnetic spring and the armature are all arranged in the adjusting oil cavity, the adjusting oil cavity is respectively communicated with a high-pressure channel and a high-pressure control channel, the two ends of the electromagnetic spring are respectively connected with the top end of the adjusting oil cavity and the top end of the armature, the electromagnetic valve is arranged above the armature, and the lower end of the armature is provided with a top plug aligned with the high-pressure channel.
In the engine valve control mechanism, a positioning plate is arranged in the regulating oil cavity, the positioning plate is sleeved outside the armature, a supporting top plate is outwards extended from the top end of the armature, a supporting bottom plate is outwards extended from the bottom end of the armature, a top plug is arranged on the supporting top plate, the high-pressure control channel is connected to the positioning plate, and an outlet of the high-pressure control channel is positioned between the positioning plate and the supporting top plate.
In the engine valve control mechanism, a supporting spring is arranged between the positioning plate and the supporting top plate.
In the engine valve control mechanism, the valve plunger is cylindrical, a cylindrical boss, a pushing round table and a valve plug are sequentially arranged on the valve plunger from top to bottom, the tail end of the cylindrical boss and the pushing round table are both arranged in a high-pressure control oil cavity, the side surface of the pushing round table is attached to the inner side of the high-pressure control oil cavity and divides the high-pressure control oil cavity into an upper oil cavity and a lower oil cavity, a needle valve pressure channel which is respectively communicated with the upper oil cavity and the lower oil cavity is arranged in the pushing round table, the valve plug is located at the tail end of the valve plunger, and the shape of the valve plug corresponds to that of a valve.
In the engine valve control mechanism, the side surface of the pushing round table, which is close to the lower oil cavity, is an inclined surface, one opening of the needle valve pressure channel is positioned on the inclined surface, the other opening of the needle valve pressure channel is positioned on a valve plunger in the upper oil cavity, and the shape of part of the side surface of the lower oil cavity is matched with the shape of the inclined surface.
In the engine valve control mechanism, a throttle valve is arranged between the high-pressure oil inlet pipe and the high-pressure oil cavity.
In the engine valve control mechanism, an auxiliary oil cavity is arranged between the high-pressure oil cavity and the high-pressure control oil cavity, the top end of the cylindrical bulge is arranged in the auxiliary oil cavity, an auxiliary spring is arranged between the top end of the cylindrical bulge and the top end of the auxiliary oil cavity, and the auxiliary oil cavity is communicated with the regulating oil cavity.
In the engine valve control mechanism, the top end of the adjusting oil cavity is provided with an oil return pipe communicated with the adjusting oil cavity.
In the engine valve control mechanism, the edges of the valve plug and the valve are respectively provided with a corresponding bevel angle.
Compared with the prior art, the engine valve control mechanism comprises a valve mechanism, a hydraulic mechanism and an electromagnetic mechanism, wherein the valve mechanism comprises an air pipe, an air valve communicated with the air pipe and a valve plunger used for opening and closing the air valve, the hydraulic mechanism comprises a high-pressure oil inlet pipe, a high-pressure oil cavity used for pushing the valve plunger and a high-pressure control oil cavity, the top of the valve plunger is arranged in the high-pressure oil cavity, the middle of the valve plunger is arranged in the high-pressure control oil cavity, the air valve is arranged below the valve plunger, the high-pressure oil inlet pipe is respectively communicated with the high-pressure oil cavity and the high-pressure control oil cavity, a high-pressure control channel is arranged between the electromagnetic mechanism and the high-pressure oil cavity, and the electromagnetic mechanism is used for controlling the communication/blocking between the high-pressure channel and the electromagnetic mechanism. The engine valve control mechanism is simple in structure, stable and reliable in driving of the valve and capable of effectively improving the economic performance of the engine.
Drawings
Fig. 1 is a schematic diagram of a preferred embodiment of an engine valve control mechanism according to the present invention.
Fig. 2 is a schematic diagram of an intake structure of a preferred embodiment of an engine valve control mechanism according to the present invention.
Fig. 3 is a schematic diagram of an exhaust structure of a preferred embodiment of an engine valve control mechanism according to the present invention.
Wherein: 11. an air pipe; 12. a valve; 121. bevel angle; 13. a valve plunger; 131. a cylindrical protrusion; 132. pushing and pressing the round table; 133. a valve plug; 134. a needle pressure passage; 21. high-pressure oil inlet pipe; 22. a high-pressure oil chamber; 221. a high pressure passage; 23. a high-pressure control oil chamber; 231. a high pressure control channel; 24. a throttle valve; 25. an auxiliary oil chamber; 26. an auxiliary spring; 31. adjusting the oil cavity; 32. an electromagnetic valve; 33. an electromagnetic spring; 34. an armature; 35. a top plug; 36. a positioning plate; 37. a supporting top plate; 38. a support base plate; 39. a support spring; 40. a power supply; 50. and an oil return pipe.
Detailed Description
The present invention provides an engine valve control mechanism, and for the purpose, technical scheme and effect of the present invention to be more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, a schematic structural diagram of an engine valve control mechanism provided by the present invention is shown, wherein an intake valve control mechanism is provided on the left side of the diagram, an exhaust valve control mechanism is provided on the right side of the diagram, the intake valve control mechanism and the exhaust valve control mechanism have the same structure and each include a valve mechanism, a hydraulic mechanism and an electromagnetic mechanism, the valve mechanism includes an air pipe 11, a valve 12 communicating with the air pipe 11, and a valve plunger 13 for opening and closing the valve 12, the hydraulic mechanism includes a high-pressure oil inlet pipe 21, a high-pressure oil cavity 22 for pushing the valve plunger 13, and a high-pressure control oil cavity 23, the top of the valve plunger 13 is disposed in the high-pressure oil cavity 22, the middle of the valve plunger 13 is disposed in the high-pressure control oil cavity 23, the valve 12 is disposed below the valve plunger 13, the high-pressure oil inlet pipe 21 is respectively communicated with the high-pressure oil cavity 22 and the high-pressure control oil cavity 23, a high-pressure oil channel 231 is disposed between the electromagnetic mechanism and the high-pressure control oil cavity 23, a high-pressure channel 221 is disposed between the electromagnetic mechanism and the high-pressure oil cavity 22, and the electromagnetic mechanism is controlled between the high-pressure channel 221 and the electromagnetic mechanism.
The hydraulic oil is input into the high-pressure oil cavity 22 and the high-pressure control oil cavity 23 through the high-pressure oil inlet pipe 21, and the communication/blocking between the high-pressure channel 221 and the electromagnetic mechanism is controlled through the electromagnetic mechanism, so that the position relationship between the valve plunger 13 and the valve 12 can be changed and limited, the hydraulic structure and the electromagnetic mechanism can realize driving control over an air inlet valve mechanism and an air outlet valve, and the valve of the engine is opened and closed according to the actual working condition requirement.
In a specific embodiment, the electromagnetic mechanism includes an adjusting oil chamber 31, an electromagnetic valve 32, an electromagnetic spring 33 and an armature 34, wherein the electromagnetic valve 32, the electromagnetic spring 33 and the armature 34 are all disposed in the adjusting oil chamber 31, the adjusting oil chamber 31 is respectively communicated with a high-pressure channel 221 and a high-pressure control channel 231, two ends of the electromagnetic spring 33 are respectively connected with the top end of the adjusting oil chamber 31 and the top end of the armature 34, the electromagnetic valve 32 is disposed above the armature 34, and a top plug 35 aligned with the high-pressure channel 221 is disposed at the lower end of the armature 34.
When the electromagnetic valve 32 is not electrified, the armature 34 is subjected to the elastic force of the electromagnetic spring 33, so that the top plug 35 at the lower end of the armature 34 props against the outlet of the high-pressure channel 221, and the communication between the high-pressure oil cavity 22 and the regulating oil cavity 31 is blocked; when the solenoid valve 32 is energized, the solenoid valve 32 attracts the armature 34, and the plunger 35 at the lower end of the armature 34 is separated from the outlet of the high-pressure passage 221, thereby allowing the high-pressure passage 221 to communicate with the regulating oil chamber 31. Of course, a power supply 40 for supplying power to the solenoid valve 32 is also included outside the solenoid mechanism, such as a 12V dc power supply provided outside the mechanism, or the solenoid valve 32 is directly supplied through the battery management system of the automobile.
More specifically, a positioning plate 36 is disposed in the oil chamber 31, the positioning plate 36 is sleeved outside the armature 34, a supporting top plate 37 extends outwards from the top end of the armature 34, a supporting bottom plate 38 extends outwards from the bottom end of the armature 34, the top plug 35 is disposed on the supporting bottom plate 38, the high-pressure control channel 231 is connected to the positioning plate 36, and an outlet of the high-pressure control channel 231 is located between the positioning plate 36 and the supporting bottom plate 38. The armature 34 can only move in the positioning plate 36, and when the solenoid valve 32 attracts the armature 34, the support bottom plate 38 at the top end of the armature 34 abuts the positioning plate 36 and blocks the outlet of the high pressure control passage 231.
Meanwhile, the valve plunger 13 is cylindrical, the valve plunger 13 is sequentially provided with a cylindrical boss 131, an pushing round table 132 and a valve plug 133 from top to bottom, the tail end of the cylindrical boss 131 and the pushing round table 132 are both arranged in the high-pressure control oil cavity 23, the side surface of the pushing round table 132 is attached to the inner side of the high-pressure control oil cavity 23 and separates the high-pressure control oil cavity 23 into an upper oil cavity and a lower oil cavity (not numbered in the figure), a needle valve pressure channel 134 which is respectively communicated with the upper oil cavity and the lower oil cavity is arranged in the pushing round table 132, the valve plug 133 is positioned at the tail end of the valve plunger 13, and the shape of the valve plug 133 corresponds to that of the valve 12.
When the valve plunger 13 moves down to cause the valve plug 133 to close the valve 12, at this time, the solenoid valve 32 has sucked the armature 34, the supporting bottom plate 38 at the top end of the armature 34 has stuck to the positioning plate 36 and blocked the outlet of the high pressure control channel 231, and the hydraulic oil in the lower oil chamber will enter the upper oil chamber through the needle valve pressure channel 134, so that the pressure and volume of the upper oil chamber increase, and assist the high pressure oil chamber 22 to push the valve plunger 13 downward.
The side surface of the pushing round table 132, which is close to the lower oil cavity, is an inclined surface, one opening of the needle valve pressure channel 134 is positioned on the inclined surface, the other opening of the needle valve pressure channel 134 is positioned on the valve plunger 13 in the upper oil cavity, and part of the shape of the side surface of the lower oil cavity is matched with the shape of the inclined surface. When the valve plunger 13 moves down to close the valve 133 to the valve 12, the inclined surface of the pressing land 132 comes into contact with the side surface of the lower oil chamber at this time, the needle valve pressure passage 134 is blocked, and the high-pressure oil chamber 22 and the upper oil chamber are kept in a high-pressure state, that is, the valve plunger 133 is kept in a state of closing the valve 12.
Further, a supporting spring 39 is disposed between the supporting top plate 37 and the positioning plate 36. The supporting spring 39 can bring buffering elastic force to the armature 34, and through the combined action of the supporting spring 39 and the electromagnetic spring 33, the movement of the armature 34 during the operation of the electromagnetic valve 32 can be more stable and reliable, and the impact generated when the top plug 35 props against the high-pressure channel 221 can be reduced.
Further, a throttle valve 24 is disposed between the high-pressure oil inlet pipe 21 and the high-pressure oil chamber 22. The rate of hydraulic oil from the high-pressure oil intake pipe 21 into the high-pressure oil chamber 22 can be controlled by the throttle valve 24, thereby controlling the moving rate of the valve plunger 13, i.e., the speed at which the valve 12 is closed. The edges of the valve plug 133 and the valve 12 are respectively provided with a corresponding bevel 121, so that the valve 12 can be matched with the valve plug 133, the valve 12 can be pressed in better, and air leakage is prevented.
In addition, an auxiliary oil chamber 25 is arranged between the high-pressure oil chamber 22 and the high-pressure control oil chamber 23, the top end of the cylindrical boss 131 is arranged in the auxiliary oil chamber 25, an auxiliary spring 26 is arranged between the top end of the cylindrical boss 131 and the top end of the auxiliary oil chamber 25, and the auxiliary oil chamber 25 is communicated with the regulating oil chamber 31. During the opening and closing of the valve 12, the valve plunger 13 can be assisted to move by the auxiliary oil chamber 25, and the response speed is improved. More preferably, the top end of the adjusting oil chamber 31 is provided with an oil return pipe 50 communicated with the adjusting oil chamber 31, and the excessive hydraulic oil in the control mechanism of the whole valve 12 can be discharged and recovered through the oil return pipe 50.
For a better understanding of the present invention, the following details of the specific operating conditions of the valve control mechanism are described with reference to fig. 1 to 3:
when the engine is in the intake stroke: the exhaust valve control mechanism on the right side controls the exhaust valve to be closed; at this time, the electromagnetic valve 32 is powered off, the electromagnetic spring 33 pushes the armature 34 through elasticity and enables the top plug 35 at the lower end of the armature 34 to prop against the high-pressure channel 221, and meanwhile, the high-pressure oil inlet pipe 21 continuously injects high-pressure hydraulic oil into the high-pressure oil cavity 22 and the high-pressure control oil cavity 23; at this time, the high-pressure oil chamber 22 is in a high-pressure state and cannot release pressure through the high-pressure channel 221, so the high-pressure oil chamber 22 can only push the top end of the valve plunger 13 downwards, so that the valve plunger 13 moves downwards; the upper oil chamber of the high-pressure control oil chamber 23 is also in a high-pressure state, but at this time, hydraulic oil in the upper oil chamber can enter the lower oil chamber through the needle valve pressure channel 134 and enter the regulating oil chamber 31 through the lower oil chamber, so that the valve plunger 13 can move smoothly; when the valve plunger 13 moves down to the inclined surface of the pushing round table 132 to be attached to the side surface of the lower oil cavity, the valve plug completely closes the valve, at this time, the needle valve pressure channel 134 is closed and no pressure is released, both the high-pressure oil cavity 22 and the upper oil cavity are kept in a high-pressure state, the valve plunger 13 is propped against, and the exhaust valve is kept in a closed state.
Meanwhile, an air inlet valve control mechanism on the left side controls an air inlet valve to be opened; at this time, the electromagnetic valve 32 is electrified and attracts the armature 34 through magnetic force, the top plug 35 at the top end of the armature 34 leaves the high-pressure channel 221, and the high-pressure oil cavity 22 is communicated with the regulating oil cavity 31; at this time, the hydraulic oil in the high-pressure oil chamber 22 enters the regulating oil chamber 31 through the high-pressure channel 221, the oil pressure in the high-pressure oil chamber 22 and the oil pressure in the regulating oil chamber 31 are kept balanced, and the high-pressure oil chamber 22 does not push the valve plunger 13 downwards; the high-pressure hydraulic oil entering the high-pressure control oil chamber 23 firstly enters the upper oil chamber and then enters the lower oil chamber through the needle valve pressure channel 134, at this time, the outlet of the high-pressure control channel 231 is blocked by the armature 34, so that the oil pressure in the lower oil chamber increases and pushes the valve plunger 13 to move upwards, at this time, the valve plunger 133 leaves the valve 12, and when the oil pressure in the lower oil chamber keeps high pressure, the valve plunger 13 keeps the position of the valve plunger not to move downwards, and the valve 12 is prevented from sucking the valve plunger 133 during air intake.
When the valve control mechanism controls the exhaust valve to be closed and the air inlet valve to be opened, the piston in the cylinder of the engine moves downwards, the cylinder is in vacuum, and external air is sucked through the air inlet valve and the air inlet pipe, so that the air inlet stroke of the engine is completed.
When the engine is in the exhaust stroke: the left air inlet valve control mechanism controls the air inlet valve to be closed; at this time, the electromagnetic valve 32 is powered off, the electromagnetic spring 33 pushes the armature 34 through elasticity and enables the top plug 35 at the lower end of the armature 34 to prop against the high-pressure channel 221, and meanwhile, the high-pressure oil inlet pipe 21 continuously injects high-pressure hydraulic oil into the high-pressure oil cavity 22 and the high-pressure control oil cavity 23; at this time, the high-pressure oil chamber 22 is in a high-pressure state and cannot release pressure through the high-pressure channel 221, so the high-pressure oil chamber 22 can only push the top end of the valve plunger 13 downwards, so that the valve plunger 13 moves downwards; the upper oil chamber of the high-pressure control oil chamber 23 is also in a high-pressure state, but at this time, hydraulic oil in the upper oil chamber can enter the lower oil chamber through the needle valve pressure channel 134 and enter the regulating oil chamber 31 through the lower oil chamber, so that the valve plunger 13 can move smoothly; when the valve plunger 13 moves down to the inclined surface of the pushing round table 132 to be attached to the side surface of the lower oil cavity, the valve plug 133 completely closes the valve 12, at this time, the needle valve pressure channel 134 is closed and no pressure is released, both the high-pressure oil cavity 22 and the upper oil cavity are kept in a high-pressure state, the valve plunger 13 is propped against, and the air inlet valve is kept in a closed state.
Simultaneously, the exhaust valve control mechanism on the right side controls the exhaust valve to be opened; at this time, the electromagnetic valve 32 is electrified and attracts the armature 34 through magnetic force, the top plug 35 at the lower end of the armature 34 leaves the high-pressure channel 221, and the high-pressure oil cavity 22 is communicated with the regulating oil cavity 31; at this time, the hydraulic oil in the high-pressure oil chamber 22 enters the regulating oil chamber 31 through the high-pressure channel 221, the oil pressure in the high-pressure oil chamber 22 and the regulating oil chamber 31 are kept balanced, and the high-pressure oil chamber 22 does not push the valve plunger 13 downwards any more; and the high-pressure hydraulic oil that has entered the high-pressure control oil chamber 23 first enters the upper oil chamber and then enters the lower oil chamber through the needle valve pressure passage 134, so that the outlet of the high-pressure control passage 231 is blocked by the armature 34 at this time, the oil pressure in the lower oil chamber increases and is maintained, so that the valve plug 133 is kept away from the valve 12 and is kept in a state of being away.
When the valve control mechanism controls the air inlet valve to be closed and the air outlet valve to be opened, the piston in the engine cylinder moves upwards, and the waste gas after combustion in the engine cylinder is discharged through the air outlet valve and the exhaust pipe, so that the exhaust stroke of the engine is completed.
Compared with the existing valve control mode, the valve control mechanism of the invention has very reliable operation and can flexibly and independently control the opening and closing of the valve, thereby being capable of arbitrarily setting the opening or closing duration of the air inlet valve and the air outlet valve at each timing in 4 air distribution timings of the engine, leading the working parameters of each working condition of the engine to meet the optimal performance requirements and achieving the purposes of energy conservation and emission reduction.
In addition, the position of the valve plug in the valve control mechanism is positioned above the valve, so that the exhaust gas cannot be completely discharged because of a gap generated by reserving the position of the valve plug when the valve control mechanism performs exhaust or air suction, and certain exhaust gas is reserved in the cylinder when the spark plug is ignited, and the conditions that the explosion is not thorough enough in the explosion stroke of the engine and the combustion of mixed gas in the cylinder is insufficient are avoided. Therefore, the invention simplifies the structure of the engine, improves the combustion efficiency of the engine, lightens the weight of the engine, reduces the production cost of the engine and finally effectively improves the economic performance of the engine.
In summary, the invention provides an engine valve control mechanism, which comprises a valve mechanism, a hydraulic mechanism and an electromagnetic mechanism, wherein the valve mechanism comprises an air pipe, a valve communicated with the air pipe and a valve plunger used for opening and closing the valve, the hydraulic mechanism comprises a high-pressure oil inlet pipe, a high-pressure oil cavity used for pushing the valve plunger and a high-pressure control oil cavity, the top of the valve plunger is arranged in the high-pressure oil cavity, the middle of the valve plunger is arranged in the high-pressure control oil cavity, the valve is arranged below the valve plunger, the high-pressure oil inlet pipe is respectively communicated with the high-pressure oil cavity and the high-pressure control oil cavity, a high-pressure control channel is arranged between the electromagnetic mechanism and the high-pressure oil cavity, and the electromagnetic mechanism is used for controlling the communication/blocking between the high-pressure channel and the electromagnetic mechanism. The engine valve control mechanism is simple in structure, stable and reliable in driving of the valve and capable of effectively improving the economic performance of the engine.
It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present invention and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention as defined in the following claims.
Claims (4)
1. The valve mechanism comprises an air pipe, an air valve communicated with the air pipe and an air valve plunger used for opening and closing the air valve, the hydraulic mechanism comprises a high-pressure oil inlet pipe, a high-pressure oil cavity used for pushing the air valve plunger and a high-pressure control oil cavity, the top of the air valve plunger is arranged in the high-pressure oil cavity, the middle part of the air valve plunger is arranged in the high-pressure control oil cavity, the air valve is arranged below the air valve plunger, the high-pressure oil inlet pipe is respectively communicated with the high-pressure oil cavity and the high-pressure control oil cavity, a high-pressure control channel is arranged between the electromagnetic mechanism and the high-pressure control oil cavity, and the electromagnetic mechanism is used for controlling the high-pressure channel to be communicated with/blocked by the electromagnetic mechanism;
the electromagnetic mechanism comprises an adjusting oil cavity, an electromagnetic valve, an electromagnetic spring and an armature, wherein the electromagnetic valve, the electromagnetic spring and the armature are all arranged in the adjusting oil cavity, the adjusting oil cavity is respectively communicated with a high-pressure channel and a high-pressure control channel, two ends of the electromagnetic spring are respectively connected with the top end of the adjusting oil cavity and the top end of the armature, the electromagnetic valve is arranged above the armature, and the lower end of the armature is provided with a top plug aligned with the high-pressure channel;
the adjusting oil cavity is internally provided with a positioning plate, the positioning plate is sleeved outside the armature, the top end of the armature is outwards extended to form a supporting top plate, the bottom end of the armature is outwards extended to form a supporting bottom plate, the top plug is arranged on the supporting top plate, the high-pressure control channel is connected to the positioning plate, and an outlet of the high-pressure control channel is positioned between the positioning plate and the supporting top plate;
a supporting spring is arranged between the positioning plate and the supporting top plate;
the valve plunger is cylindrical in shape, a cylindrical bulge, an pushing round table and a valve plug are sequentially arranged on the valve plunger from top to bottom, the tail end of the cylindrical bulge and the pushing round table are both arranged in a high-pressure control oil cavity, the side surface of the pushing round table is attached to the inner side of the high-pressure control oil cavity and divides the high-pressure control oil cavity into an upper oil cavity and a lower oil cavity, a needle valve pressure channel which is respectively communicated with the upper oil cavity and the lower oil cavity is arranged in the pushing round table, the valve plug is positioned at the tail end of the valve plunger, the shape of the valve plug corresponds to the shape of the valve, and corresponding bevel angles are respectively arranged at the edges of the valve plug and the valve;
the electromagnetic mechanism also comprises a power supply for supplying power to the electromagnetic valve;
an auxiliary oil cavity is arranged between the high-pressure oil cavity and the high-pressure control oil cavity, the top end of the cylindrical bulge is arranged in the auxiliary oil cavity, an auxiliary spring is arranged between the top end of the cylindrical bulge and the top end of the auxiliary oil cavity, and the auxiliary oil cavity is communicated with the adjusting oil cavity;
when the valve plunger moves downwards to enable the valve plug to close the valve, the electromagnetic valve can suck the armature, the supporting bottom plate at the top end of the armature is attached to the positioning plate, and the outlet of the high-pressure control channel is blocked.
2. The engine valve control mechanism according to claim 1, wherein a side surface of the pressing land, which is close to the lower oil chamber, is an inclined surface, an opening of the needle valve pressure passage is located on the inclined surface, another opening of the needle valve pressure passage is located on a valve plunger in the upper oil chamber, and a part of a shape of the side surface of the lower oil chamber matches a shape of the inclined surface.
3. An engine valve control mechanism according to claim 1, wherein a throttle valve is provided between the high pressure oil inlet pipe and the high pressure oil chamber.
4. An engine valve control mechanism according to claim 1, wherein a top end of the regulating oil chamber is provided with an oil return pipe communicating with the regulating oil chamber.
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| CN201910216913.XA CN109779714B (en) | 2019-03-21 | 2019-03-21 | Engine valve control mechanism |
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| CN201910216913.XA CN109779714B (en) | 2019-03-21 | 2019-03-21 | Engine valve control mechanism |
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| CN109779714A CN109779714A (en) | 2019-05-21 |
| CN109779714B true CN109779714B (en) | 2024-02-06 |
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| CN209724437U (en) * | 2019-03-21 | 2019-12-03 | 深圳职业技术学院 | A kind of engine air valve controlling mechanism |
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| JP2003343384A (en) * | 2002-05-22 | 2003-12-03 | Mitsubishi Electric Corp | High pressure fuel feed device |
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