CN114961916A - Mechanical hydraulic control device and variable valve actuating mechanism - Google Patents
Mechanical hydraulic control device and variable valve actuating mechanism Download PDFInfo
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- CN114961916A CN114961916A CN202111406147.7A CN202111406147A CN114961916A CN 114961916 A CN114961916 A CN 114961916A CN 202111406147 A CN202111406147 A CN 202111406147A CN 114961916 A CN114961916 A CN 114961916A
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- 230000007246 mechanism Effects 0.000 title abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 108
- 230000000712 assembly Effects 0.000 claims description 13
- 238000000429 assembly Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000010720 hydraulic oil Substances 0.000 description 14
- 230000033001 locomotion Effects 0.000 description 10
- 238000004891 communication Methods 0.000 description 9
- 239000012530 fluid Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000003921 oil Substances 0.000 description 1
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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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
- F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
- F01L9/12—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
- F01L9/14—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses a mechanical hydraulic control device and a variable valve timing mechanism. The mechanical hydraulic control device comprises a slide valve body assembly and a first driving shaft; the slide valve body assembly comprises a slide valve sleeve provided with a liquid inlet hole, a slide valve body comprising a body part and a screw rod, and a driving body comprising a driving body and a driving rod; the slide valve body is arranged in the slide valve sleeve; the body part is internally provided with a liquid inlet channel and a liquid outlet channel which are communicated; the driving body is sleeved on the screw rod; the outer surface of the first driving shaft is provided with a ring groove, and the ring groove comprises a first part and a second part which are different in position and communicated with each other along the axial direction of the first driving shaft; the driving rod can be inserted into the annular groove and can slide in the annular groove under the rotary drive of the first driving shaft so as to drive the slide valve body to move along the axial direction of the screw rod, and then the liquid inlet channel is communicated or not communicated with the liquid inlet hole. According to the mechanical hydraulic control device, the adjustment of the gas distribution timing of the diesel engine and the adjustment of the lift of the air valve can be realized, and the performance of equipment is effectively improved.
Description
Technical Field
The invention belongs to the technical field of diesel engines, relates to a variable gas distribution technology, and particularly relates to a mechanical hydraulic control device and a variable gas distribution mechanism.
Background
With the stricter emission regulations and the continuous development of the technical level, the variable gas distribution technology is applied to the diesel engine to improve the overall performance of the diesel engine. However, the variable air distribution of the existing diesel engine is realized by controlling a hydraulic oil circuit through an electromagnetic valve to adjust the height of a hydraulic cavity.
The electromagnetic valve needs to act twice in each working cycle of the diesel engine, so that the problems of short service life, low reliability and the like exist.
To this end, the present invention provides a mechanical hydraulic control apparatus and a variable valve gear to at least partially solve the above problems.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to solve the above problem at least partially, according to a first aspect of the present invention, there is provided a mechanical hydraulic control apparatus for a variable valve gear, the mechanical hydraulic control apparatus comprising:
a spool valve body assembly, said spool valve body assembly comprising:
the slide valve sleeve is provided with a liquid inlet hole;
the slide valve body is arranged in the slide valve sleeve and comprises a body part and a screw rod connected to the body part, and a liquid inlet channel and a liquid outlet channel which are communicated are arranged in the body part;
the driving body comprises a driving body and a driving rod connected to the side part of the driving body, and the driving body is sleeved on the screw rod and is provided with an internal thread matched with the screw rod;
first drive shaft, first drive shaft with the screw rod is parallel, the annular has been seted up to the surface of first drive shaft, the annular include the first portion and with the second portion of first portion intercommunication is followed the axial direction of first drive shaft, the first portion with the position of second portion is different, the actuating lever can insert the annular, and can be in under the rotary drive of first drive shaft in slide in the annular, so as to drive the sliding valve body is followed the axial displacement of screw rod, and then make the inlet channel with the inlet hole intercommunication or not communicate.
According to the mechanical hydraulic control device of the present invention, the driving body can be connected to the spool body by the engagement of the internal thread of the driving body with the screw; the outer surface of the first driving shaft is provided with a ring groove which comprises a first part and a second part communicated with the first part, the positions of the first part and the second part are different along the axial direction of the first driving shaft, the side part of the driving body is provided with a driving rod, the driving rod is inserted into the ring groove, the driving rod can be driven to slide in a sliding groove when the first driving shaft rotates so as to drive the slide valve body to move along the axial direction of a screw rod, the liquid inlet channel of the slide valve body is communicated or not communicated with the liquid inlet hole of the slide valve sleeve so as to change the flow rate of liquid such as hydraulic oil flowing into the liquid inlet channel from the liquid inlet hole, further change the flow rate of liquid such as hydraulic oil flowing out from the liquid outlet channel of the slide valve body, further change the motion stroke of an air valve such as a diesel engine and the like communicated with a mechanical hydraulic control device, and further realize the air distribution timing adjustment and the air valve lift adjustment of the diesel engine, so as to improve the performance of equipment such as a diesel engine; the mechanical hydraulic control device has the advantage of long service life.
Optionally, the mechanical hydraulic control device further includes a second driving shaft and a transmission assembly, the screw rod extends out of the driving body and is connected to the second driving shaft through the transmission assembly, so as to drive the driving body to rotate in the slide valve sleeve under the rotational driving of the second driving shaft, so that the slide valve body generates displacement along the axial direction of the screw rod relative to the driving body, and further, the relative position of the liquid inlet channel and the liquid inlet hole is changed.
Optionally, the transmission assembly includes a first gear and a second gear, the first gear is sleeved on the tail of the screw, and the second gear is sleeved on the second driving shaft and meshed with the first gear.
Optionally, the transmission assembly further comprises a ring gear connected between the first gear and the second gear and comprising internal teeth meshing with the first gear and external teeth meshing with the second gear.
Optionally, the driving body further includes a spherical portion, the spherical portion is disposed at an end portion of the driving rod, and is capable of being inserted into the annular groove and capable of sliding in the annular groove under the rotational driving of the first driving shaft.
Optionally, the mechanical hydraulic control device further includes a first spring, a first groove is formed in one end of the spool body, which is connected to the screw rod, a second groove corresponding to the first groove is formed in the driving body, and the first spring is disposed in the first groove and the second groove.
Optionally, the liquid inlet channel includes a liquid inlet groove and a first channel, the liquid inlet groove is an annular groove that is opened on the outer surface of the body portion and extends along the circumferential direction of the body portion, the first channel extends along the radial direction of the slide valve body and is communicated with the liquid inlet groove, and the liquid outlet channel extends along the axial direction of the slide valve body and is communicated with the first channel.
Optionally, the mechanical hydraulic control device further comprises a liquid inlet joint and a liquid outlet joint, the liquid inlet joint is communicated with the liquid inlet hole, and the liquid outlet joint is communicated with the liquid outlet channel.
Optionally, the outer surface of the first driving shaft is provided with at least two ring grooves, and the at least two ring grooves have different shapes, the mechanical hydraulic control device comprises two slide valve body assemblies, and the driving rods of the slide valve body assemblies are respectively inserted into the at least two ring grooves
According to a second aspect of the present invention, there is provided a variable valve gear including the above-described mechanical hydraulic control apparatus.
According to a variable valve gear of the present invention, a driving body of a mechanical hydraulic control device can be connected to a spool body by engagement of an internal thread of a driving body with a screw; the outer surface of the first driving shaft is provided with an annular groove comprising a first part and a second part communicated with the first part, the positions of the first part and the second part are different along the axial direction of the first driving shaft, the side part of the driving body is provided with a driving rod, the driving rod is inserted into the annular groove, and the driving rod can be driven to slide in the sliding groove when the first driving shaft rotates so as to drive the slide valve body to move along the axial direction of the screw rod, so that the liquid inlet channel of the slide valve body is communicated or not communicated with the liquid inlet hole of the slide valve sleeve, and further the flow of liquid such as hydraulic oil flowing out of the liquid outlet channel of the slide valve body is changed, so that the movement stroke of an air valve such as a diesel engine and the like communicated with a mechanical hydraulic control device is changed, and further the air distribution timing adjustment and the air valve lift adjustment of the diesel engine are realized, and the performance of equipment such as the diesel engine is improved; the mechanical hydraulic control device and the variable valve actuating mechanism have the advantage of long service life.
Optionally, the variable valve timing mechanism includes two of the spool valve body assemblies, and the driving rods of the two spool valve body assemblies are respectively inserted into the ring grooves having different shapes.
Drawings
The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
In the drawings:
fig. 1 is a schematic view of a mechanical hydraulic control apparatus according to a preferred embodiment of the present invention applied to a variable valve gear;
FIG. 2 is a schematic configuration diagram of a mechanical hydraulic control apparatus according to a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of a slide valve sleeve structure of a mechanical hydraulic control device according to a preferred embodiment of the present invention;
FIG. 4 is a schematic structural view of a spool body of the mechanical hydraulic control apparatus according to a preferred embodiment of the present invention; and
fig. 5 is a schematic structural view of a driving body of a mechanical hydraulic control device according to a preferred embodiment of the present invention.
Description of reference numerals:
1: the variable valve gear 10: mechanical hydraulic control device
110: slide valve sleeve 111: liquid inlet hole
120: the spool valve body 121: body part
122: screw 123: liquid inlet channel
124: the liquid outlet channel 125: the first groove
126: liquid inlet tank 127: a first channel
128: bearing hole 130: driving body
131: the driving body 132: driving rod
133: spherical portion 134: threaded through hole
135: second groove 140: a first driving shaft
141: ring groove 142: the first part
143: second portion 144: third part
145: second bearing 146: first cover
151: the motor 152: second drive shaft
160: the transmission assembly 161: first gear
162: second gear 163: gear ring
164: the pin 165: second spring
166: third bearing 167: second cover
171: first spring 172: liquid inlet joint
173: liquid outlet joint 174: first bearing
175: cover plate 176: fastening piece
20: the hydraulic pump 30: piston assembly
31: the piston sleeve 32: piston
40: the cam assembly 41: cam shaft
42: cam 50: air valve
60: liquid pool 70: liquid inlet pipeline
80: the communication pipe 90: return liquid pipeline
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
In the following description, for purposes of explanation, specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent that the invention is not limited to the specific details known to those skilled in the art to practice the invention. The following detailed description of the preferred embodiments of the present invention, however, the present invention may have other embodiments in addition to the detailed description, and should not be construed as being limited to the embodiments set forth herein.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, and that the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. When the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The terms "upper", "lower", "front", "rear", "left", "right" and the like as used herein are for purposes of illustration only and are not limiting.
Ordinal words such as "first" and "second" are referred to herein merely as labels, and do not have any other meaning, such as a particular order, etc. Also, for example, the term "first component" does not itself imply the presence of "second component", and the term "second component" does not itself imply the presence of "first component".
In the following, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings, which illustrate representative embodiments of the invention and do not limit the invention.
Referring initially to fig. 2, a mechanical hydraulic control apparatus 10 for a variable valve train 1 according to a preferred embodiment of the present invention includes a spool body assembly and a first drive shaft 140.
Specifically, the slide valve body assembly includes a slide valve housing 110, a slide valve body 120, and a driving body 130.
The slide valve housing 110 is configured as a barrel configuration, with particular reference to FIG. 3. The slide valve housing 110 may be secured to the body of an appliance such as a diesel engine. The slide valve housing 110 is opened with a fluid inlet hole 111 for delivering fluid such as hydraulic oil. To facilitate the entry of a liquid, such as hydraulic oil, into the inlet opening 111, an inlet connection 172 is preferably provided in the first inlet, see in particular fig. 2.
The slide valve body 120 is disposed within the slide valve housing 110 and is preferably disposed coaxially with the slide valve housing 110. Spool valve body 120 may include a body portion 121 and a threaded rod 122 coupled to body portion 121, with particular reference to fig. 2 and 4. The body portion 121 may be configured as a cylinder, and a liquid inlet passage 123 and a liquid outlet passage 124 communicating with each other are provided in the body portion 121 for conveying liquid such as hydraulic oil.
In order to eliminate the need for positioning concerns during the process of sleeving the slide valve housing 110 on the slide valve body 120, the inlet channel 123 preferably comprises an inlet slot 126 and a first channel 127, see in particular fig. 4. The liquid inlet tank 126 is an annular groove opened in the outer surface of the body portion 121 and extending in the circumferential direction of the body portion 121. The first passage 127 extends in the radial direction of the spool body 120 and communicates with the liquid inlet groove 126. The liquid outlet passage 124 extends in the axial direction of the spool valve body 120 and communicates with the first passage 127, and the liquid outlet passage 124 is preferably provided in the middle of the spool valve body 120.
To facilitate the flow of liquid, such as hydraulic oil, out of the outlet channel 124, an outlet connection 173 is preferably provided at the outlet channel 124, see in particular fig. 2. The outlet fitting 173 may be disposed at the outlet passage 124 by a fastener 176 such as a bolt, a cover plate 175, and a first bearing 174.
Specifically, a bearing hole 128 (refer to fig. 4) is formed at an end of the spool 120 away from the screw 122, and the bearing hole 128 is communicated with the liquid outlet channel 124. A first bearing 174 is disposed within bearing bore 128 and is fixedly coupled to spool body 120 via a fastener 176, such as a bolt, and a cover plate 175. The liquid outlet 173 is mounted in the first bearing 174 and is rotatable with respect to the spool body 120.
The driving body 130 includes a driving body 131 and a driving rod 132 connected to a side portion of the driving body 131, with particular reference to fig. 2 and 5. The driving body 131 may be configured as a cylinder. A threaded through hole 134 extending in the axial direction of the drive body 131 is provided inside the drive body 131. The driving body 131 can be sleeved on the screw 122 through the threaded through hole 134 and is engaged with the screw 122.
Preferably, a first groove 125 is formed at one end of the slide valve body 120 connected to the screw 122, a second groove 135 corresponding to the first groove 125 is formed in the driving body 131, and a first spring 171 is disposed in the first groove 125 and the second groove 135 to compensate for axial play that may occur when the driving body 131 is engaged with the screw 122.
The first drive shaft 140 is parallel to the screw 122. First drive shaft 140 may be mounted within first housing 146 via second bearing 145. The first housing 146 may be secured to the body of an appliance such as a diesel engine.
A ring groove 141 is formed on an outer surface of the first driving shaft 140. In the embodiment shown in fig. 2, the ring groove 141 includes a first portion 142, a second portion 143, and a third portion 144. The first portion 142 may extend in a circumferential direction of the first drive shaft 140, and the second portion 143 may also extend in the circumferential direction of the first drive shaft 140. The positions of the first and second portions 142 and 143 are different in the axial direction of the first drive shaft 140. The first portion 142 and the second portion 143 communicate through a third portion 144 disposed obliquely.
It is understood that in the embodiment not shown, the ring groove 141 may be configured in other shapes as long as it can include a relatively bent portion.
The driving rod 132 can be inserted into the groove 141 and can slide in the groove 141 by the rotational driving of the first driving shaft 140. That is, when the first driving shaft 140 rotates around its axis, the driving rod 132 can slide along the ring groove 141. When the driving rod 132 slides along the ring groove 141, the sliding valve body 120 can be driven to move along the axial direction of the screw 122, so that the liquid inlet channel 123 can be communicated or not communicated with the liquid inlet hole 111, the flow rate of liquid such as hydraulic oil flowing into the liquid inlet channel 123 from the liquid inlet hole 111 can be changed, the flow rate of liquid such as hydraulic oil flowing out of the liquid outlet channel 124 of the sliding valve body 120 can be changed, the movement stroke of the air valve 50 such as a diesel engine and the like communicated with the mechanical hydraulic control device 10 can be changed, and therefore air distribution timing adjustment and air valve lift adjustment of the diesel engine can be achieved, and the performance of equipment such as the diesel engine can be improved.
To facilitate the driving rod 132 to slide along the ring groove 141, the driving body 130 preferably further includes a spherical portion 133, with particular reference to fig. 2 and 5. The spherical portion 133 is provided at an end portion of the driving rod 132, and can be inserted into the annular groove 141 and can slide in the annular groove 141 by the rotational driving of the first driving shaft 140.
In order to change the relative position between the liquid inlet channel 123 and the liquid inlet hole 111 on the basis that the driving rod 132 is matched with the annular groove 141 to connect or disconnect the liquid inlet channel 123 and the liquid inlet hole 111, the mechanical hydraulic control device 10 further includes a second driving shaft 152 and a transmission assembly 160. The screw 122 can be connected to the second driving shaft 152 through the transmission assembly 160 to rotate the driving body 131 in the slide valve housing 110 under the rotation driving of the second driving shaft 152, so that the slide valve body 120 generates a displacement along the axial direction of the screw 122 relative to the driving body 130, thereby changing the relative position of the liquid inlet channel 123 and the liquid inlet hole 111.
With particular reference to fig. 2, the screw 122 extends out through the drive body 131. The second drive shaft 152 is disposed parallel to the screw 122. The second driving shaft 152 may be an output shaft of the motor 151.
The transmission assembly 160 includes a first gear 161, a second gear 162, and a ring gear 163. The first gear 161 is sleeved on the tail of the screw 122, and specifically, can be sleeved on the tail of the screw 122 through the pin 164 and the second spring 165. The second gear 162 is fitted over the second drive shaft 152. The ring gear 163 is connected between the first gear 161 and the second gear 162, and includes inner teeth that mesh with the first gear 161 and outer teeth that mesh with the second gear 162.
When the second driving shaft 152 rotates around its axis, the second gear 162 can be driven to rotate, the second gear 162 can drive the gear ring 163 to rotate, and the gear ring 163 can drive the first gear 161 to rotate, so as to drive the slide valve body 120 to rotate in the slide valve sleeve 110. Since the driving rod 132 of the driving body 130 is restricted by the ring groove 141 of the first driving shaft 140, when the slide valve body 120 rotates in the slide valve housing 110, the slide valve body 120 can be displaced in the axial direction of the screw 122 relative to the driving body 130 by the screw 122 and the screw through hole 134 of the driving body 131, and thus the relative position of the liquid inlet passage 123 and the liquid inlet hole 111 can be changed.
The timing and degree of communication between the liquid inlet channel 123 of the slide valve body 120 and the liquid inlet hole 111 of the slide valve sleeve 110 can be reasonably controlled by adjusting the rotation speed and the rotation direction of the second driving shaft 152, so that the valve timing adjustment and the valve lift adjustment of equipment such as a diesel engine can be realized, the reasonable variable valve distribution can be realized, and the performance of the equipment such as the diesel engine can be improved.
The ring gear 163 may be mounted in the second housing 167 by a third bearing 166. The second housing 167 may be fixed to the body of an apparatus such as a diesel engine.
In an embodiment not shown, the ring gear 163 may not be provided, and the second gear 162 is directly engaged with the first gear 161 to rotate the spool valve body 120 in the spool valve housing 110 under the rotation driving of the second driving shaft 152.
In the embodiment shown in fig. 2, a ring groove 141 is formed in the outer surface of the first driving shaft 140. In other embodiments, other numbers of the ring grooves 141, such as two, three, or four, may be formed on the outer surface of the first driving shaft 140. That is, at least one ring groove 141 may be formed in the outer surface of the first driving shaft 140.
When at least two ring grooves 141 are formed in the outer surface of the first driving shaft 140, that is, when a plurality of ring grooves 141 are formed, the shapes of the formed ring grooves 141 are different. At this time, according to the actual air distribution requirement of the equipment such as a diesel engine, the driving rod 132 of the driving body 130 is inserted into the appropriate annular groove 141, so as to reasonably control the time and degree of communication between the liquid inlet channel 123 of the slide valve body 120 and the liquid inlet hole 111 of the slide valve sleeve 110, thereby realizing air distribution timing adjustment and air valve lift adjustment of the equipment such as the diesel engine, realizing reasonable variable air distribution, and improving the performance of the equipment such as the diesel engine.
In addition, when at least two ring grooves 141 are formed in the outer surface of the first driving shaft 140, the mechanical hydraulic control device 10 may include two spool body assemblies, and the driving rods 132 of the two spool body assemblies are inserted into two of the at least two ring grooves 141, respectively. Thus, two slide valve body assemblies can be respectively disposed on the liquid inlet pipeline 70 and the liquid return pipeline 90 of the variable valve train 1, and referring to fig. 1 in particular, the two slide valve body assemblies share a first driving shaft 140, so that the flow adjustment of the liquid inlet pipeline 70 and the liquid return pipeline 90 can be completed.
The invention also discloses a variable valve actuating mechanism 1, and particularly relates to fig. 1. The variable valve train 1 includes a mechanical hydraulic control device 10, a hydraulic pump 20, a piston assembly 30, a cam assembly 40, a gas valve 50, a fluid reservoir 60, a fluid inlet line 70, a communication line 80, and a fluid return line 90.
The piston assembly 30 includes a piston sleeve 31 and a piston 32 disposed within the piston sleeve 31. The piston 32 is connected to the gas valve 50. The piston sleeve 31 communicates with the communication pipe 80. The communication line 80 communicates with the hydraulic pump 20 through the liquid inlet line 70 and communicates with the liquid pool 60 through the liquid return line 90. The mechanical hydraulic control device 10 is provided in each of the liquid inlet line 70 and the liquid return line 90.
The cam assembly 40 includes a cam shaft 41 and a cam 42 fitted over the cam shaft 41. The cam 42 is in contact with the piston sleeve 31, and can drive the piston sleeve 31 to move along the contour of the cam 42 under the driving of the camshaft 41, and further drive the air valve 50 to move according to the contour line of the cam 42 through the piston 32.
When it is necessary to change the movement stroke of the air valve 50, it is only necessary to connect the first drive shaft 140 of the mechanical hydraulic control device 10 to the camshaft 41.
For the mechanical hydraulic control device 10 on the liquid inlet pipeline 70, the camshaft 41 will drive the first driving shaft 140 to rotate when rotating, and then drive the driving rod 132 to slide along the annular groove 141, so as to drive the slide valve body 120 to move along the axial direction of the screw rod 122, and further enable the liquid inlet channel 123 to be communicated or not communicated with the liquid inlet hole 111.
When the spool 120 moves in the axial direction of the screw 122 until the inlet passage 123 communicates with the inlet hole 111, a fluid such as hydraulic oil enters the outlet passage 124 through the hydraulic pump 20, and enters between the piston 32 and the piston sleeve 31 through the outlet passage 124 and the communication pipe 80, and pushes the piston 32 to move the air valve 50 along the piston sleeve 31 in the direction shown by D1, so that the movement stroke of the air valve 50 is added to the movement stroke of the piston 32 along the piston sleeve 31 in the direction shown by D1 on the basis of the contour line of the cam 42.
When the spool body 120 moves in the axial direction of the screw 122 until the inlet passage 123 is not communicated with the inlet hole 111, the amount of liquid such as hydraulic oil between the piston 32 and the piston sleeve 31 is kept constant, and the additional movement stroke of the piston 32 to the gas valve 50 is kept constant.
Similarly, for the mechanical hydraulic control device 10 on the liquid return pipeline 90, the camshaft 41 rotates to drive the first driving shaft 140 to rotate, and further drives the driving rod 132 to slide along the annular groove 141, so as to drive the slide valve body 120 to move along the axial direction of the screw rod 122, and further enable the liquid inlet channel 123 to be communicated or not communicated with the liquid inlet hole 111.
When the spool 120 moves along the axial direction of the screw 122 until the inlet passage 123 is communicated with the inlet hole 111, the liquid such as hydraulic oil between the piston 32 and the piston sleeve 31 enters the inlet hole 111 and the inlet passage 123 through the communication pipeline 80, and enters the liquid tank 60 through the outlet passage 124 and the liquid return pipeline 90, the cavities of the piston 32 and the piston sleeve 31 become small, the piston 32 drives the air valve 50 to move along the piston sleeve 31 in the direction opposite to the direction shown by D1, and thus the movement stroke of the air valve 50 is added to the stroke of the piston 32 in the direction opposite to the direction shown by D1 on the basis of the contour line of the cam 42.
When the spool body 120 moves in the axial direction of the screw 122 until the inlet passage 123 is not communicated with the inlet hole 111, the amount of liquid such as hydraulic oil between the piston 32 and the piston sleeve 31 is kept constant, and the additional movement stroke of the piston 32 to the gas valve 50 is kept constant.
It should be noted that, when the outer surface of the first driving shaft 140 is provided with a ring groove 141, the shape of the ring groove 141 of the first driving shaft 140 of the mechanical hydraulic control device 10 on the liquid inlet pipeline 70 is different from the shape of the ring groove 141 of the first driving shaft 140 of the mechanical hydraulic control device 10 on the liquid return pipeline 90, so as to control the flow rates of the liquid inlet pipeline 70 and the liquid return pipeline 90 as required, and further adjust the movement stroke of the gas valve 50 as required.
When the outer surface of the first driving shaft 140 is provided with at least two annular grooves 141, the slide valve body assembly on the liquid inlet pipeline 70 and the slide valve body assembly on the liquid return pipeline 90 can share one first driving shaft 140, and the driving rods 132 of the two slide valve body assemblies are respectively inserted into the annular grooves 141 with different shapes of the first driving shaft 140.
In addition, the timing and the lift of the air valve of the equipment such as a diesel engine can be adjusted by reasonably controlling the time and the degree of communication between the liquid inlet channel 123 of the slide valve body 120 and the liquid inlet hole 111 of the slide valve sleeve 110 by changing the oil supply pressure of the hydraulic pump 20, for example, setting the hydraulic pump 20 as a variable pressure type hydraulic pump, so that reasonable variable air distribution is realized, and the performance of the equipment such as a diesel engine is improved.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "part," "member," and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (11)
1. A mechanical hydraulic control apparatus for a variable valve gear, characterized by comprising:
a spool valve body assembly, said spool valve body assembly comprising:
the slide valve sleeve is provided with a liquid inlet hole;
the slide valve body is arranged in the slide valve sleeve and comprises a body part and a screw rod connected to the body part, and a liquid inlet channel and a liquid outlet channel which are communicated are arranged in the body part;
the driving body comprises a driving body and a driving rod connected to the side part of the driving body, and the driving body is sleeved on the screw rod and is provided with an internal thread matched with the screw rod;
first drive shaft, first drive shaft with the screw rod is parallel, the annular has been seted up to the surface of first drive shaft, the annular include the first portion and with the second part of first portion intercommunication is followed the axial direction of first drive shaft, the first portion with the position of second part is different, the drive rod can insert the annular, and can be in under the rotary drive of first drive shaft slide in the annular, in order to drive the slide valve body is followed the axial displacement of screw rod, and then make the feed liquor passageway with feed liquor hole intercommunication or not intercommunication.
2. The mechanical hydraulic control device as claimed in claim 1, further comprising a second driving shaft and a transmission assembly, wherein the screw extends out of the driving body and is connected to the second driving shaft through the transmission assembly, so that the driving body is driven to rotate in the slide valve housing by the rotation of the second driving shaft, and the slide valve body is displaced relative to the driving body along an axial direction of the screw, thereby changing a relative position of the liquid inlet channel and the liquid inlet hole.
3. The mechanical hydraulic control device of claim 2, wherein the transmission assembly includes a first gear and a second gear, the first gear is sleeved on the tail of the screw, and the second gear is sleeved on the second drive shaft and is engaged with the first gear.
4. The mechanical hydraulic control device of claim 3, wherein the transmission assembly further includes a ring gear connected between the first gear and the second gear and including internal teeth meshing with the first gear and external teeth meshing with the second gear.
5. The mechanical hydraulic control apparatus according to claim 1, wherein the drive body further includes a spherical portion that is provided at an end portion of the drive rod, that is insertable into the annular groove, and that is slidable in the annular groove by rotational driving of the first drive shaft.
6. The mechanical hydraulic control device as claimed in claim 1, further comprising a first spring, wherein a first groove is formed at one end of the spool body, which is connected to the screw rod, a second groove corresponding to the first groove is formed in the driving body, and the first spring is disposed in the first groove and the second groove.
7. The mechanical hydraulic control device according to claim 1, wherein the liquid inlet passage includes a liquid inlet groove that is an annular groove that is opened in an outer surface of the main body portion and extends along a circumferential direction of the main body portion, and a first passage that extends in a radial direction of the spool body and communicates with the liquid inlet groove, and the liquid outlet passage extends in an axial direction of the spool body and communicates with the first passage.
8. The mechanical hydraulic control device as claimed in claim 1, further comprising an inlet joint and an outlet joint, wherein the inlet joint is communicated with the inlet hole, and the outlet joint is communicated with the outlet channel.
9. The mechanical hydraulic control device according to any one of claims 1 to 8, wherein the outer surface of the first drive shaft is provided with at least two of the annular grooves, and the at least two annular grooves are different in shape, and the mechanical hydraulic control device includes two of the spool valve body assemblies, and the drive rods of the two spool valve body assemblies are respectively inserted into two of the at least two annular grooves.
10. A variable valve gear, characterized in that the variable valve gear comprises the mechanical hydraulic control apparatus according to any one of claims 1 to 9.
11. The variable valve gear according to claim 10, wherein the variable valve gear comprises two of the spool valve body assemblies, and the drive levers of the two spool valve body assemblies are respectively inserted into the annular grooves having different shapes.
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| CN202111406147.7A CN114961916B (en) | 2021-11-24 | 2021-11-24 | Mechanical hydraulic control device and variable valve mechanism |
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| CN202111406147.7A CN114961916B (en) | 2021-11-24 | 2021-11-24 | Mechanical hydraulic control device and variable valve mechanism |
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| CN114961916B CN114961916B (en) | 2024-06-14 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1105098A (en) * | 1993-06-04 | 1995-07-12 | 曼·B及W柴油机公司 | A spool valve and a large two-stroke internal combustion engine |
| US20010008129A1 (en) * | 2000-01-18 | 2001-07-19 | Unisia Jecs Corporation | Control apparatus for variably operated engine valve mechanism of internal combustion engine |
| CN103016088A (en) * | 2011-09-20 | 2013-04-03 | 日立汽车系统株式会社 | Hydraulic control unit for use in valve timing control apparatus and controller for hydraulic control unit |
| JP2014159802A (en) * | 2013-02-20 | 2014-09-04 | Kosaku Yamauchi | Three-dimensional cam type continuous stepless variable valve gear with one exhaust shaft and twin intake cam shafts |
| US20160363011A1 (en) * | 2015-06-12 | 2016-12-15 | Hyundai Motor Company | Multiple variable valve lift apparatus |
| CN106854999A (en) * | 2016-12-13 | 2017-06-16 | 大连理工大学 | An intensive hydraulic axially movable two-stage variable valve drive system and its control method |
| CN107060937A (en) * | 2017-02-20 | 2017-08-18 | 山东大学 | Full hydraulic variable valve mechanism valve stroke control device and internal combustion engine |
| CN107304720A (en) * | 2016-04-20 | 2017-10-31 | 莫嘉林 | Automobile engine becomes circulation and becomes cylinder system |
| CN108240244A (en) * | 2017-12-29 | 2018-07-03 | 潍柴动力股份有限公司 | Diesel engine inlet valve variable system and diesel engine |
| CN208057245U (en) * | 2016-04-20 | 2018-11-06 | 莫嘉林 | Automobile engine becomes cycle and becomes cylinder system |
-
2021
- 2021-11-24 CN CN202111406147.7A patent/CN114961916B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1105098A (en) * | 1993-06-04 | 1995-07-12 | 曼·B及W柴油机公司 | A spool valve and a large two-stroke internal combustion engine |
| US20010008129A1 (en) * | 2000-01-18 | 2001-07-19 | Unisia Jecs Corporation | Control apparatus for variably operated engine valve mechanism of internal combustion engine |
| CN103016088A (en) * | 2011-09-20 | 2013-04-03 | 日立汽车系统株式会社 | Hydraulic control unit for use in valve timing control apparatus and controller for hydraulic control unit |
| JP2014159802A (en) * | 2013-02-20 | 2014-09-04 | Kosaku Yamauchi | Three-dimensional cam type continuous stepless variable valve gear with one exhaust shaft and twin intake cam shafts |
| US20160363011A1 (en) * | 2015-06-12 | 2016-12-15 | Hyundai Motor Company | Multiple variable valve lift apparatus |
| CN107304720A (en) * | 2016-04-20 | 2017-10-31 | 莫嘉林 | Automobile engine becomes circulation and becomes cylinder system |
| CN208057245U (en) * | 2016-04-20 | 2018-11-06 | 莫嘉林 | Automobile engine becomes cycle and becomes cylinder system |
| CN106854999A (en) * | 2016-12-13 | 2017-06-16 | 大连理工大学 | An intensive hydraulic axially movable two-stage variable valve drive system and its control method |
| CN107060937A (en) * | 2017-02-20 | 2017-08-18 | 山东大学 | Full hydraulic variable valve mechanism valve stroke control device and internal combustion engine |
| CN108240244A (en) * | 2017-12-29 | 2018-07-03 | 潍柴动力股份有限公司 | Diesel engine inlet valve variable system and diesel engine |
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|---|---|
| CN114961916B (en) | 2024-06-14 |
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