CN110131010A - A kind of camshaft axial adjustment structure for internal combustion engine - Google Patents
A kind of camshaft axial adjustment structure for internal combustion engine Download PDFInfo
- Publication number
- CN110131010A CN110131010A CN201910401229.9A CN201910401229A CN110131010A CN 110131010 A CN110131010 A CN 110131010A CN 201910401229 A CN201910401229 A CN 201910401229A CN 110131010 A CN110131010 A CN 110131010A
- Authority
- CN
- China
- Prior art keywords
- guide part
- axle sleeve
- cam shaft
- cam
- shaft mandrel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/08—Shape of cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L13/0047—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0471—Assembled camshafts
- F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The present invention provides a kind of camshaft axial adjustment structure for internal combustion engine applied to engine air valve lift systems technology field, outer teeth portion A and outer teeth portion B is axially arranged along cam shaft mandrel (1) outer surface in cam shaft mandrel (1) outer surface, interior teeth portion A is arranged in axle sleeve A (2) inner surface, interior teeth portion B is arranged in axle sleeve B (3) inner surface, axle sleeve A (2) includes cam pack A (11) and adjusts component A (12), big cam A (13) and small cam A (14) are set on cam pack A (11), adjust the guide part A (7) of (12) outer surface component A setting protrusion, adjust the guide part B (21) of (18) outer surface component B setting protrusion, two-stage variable air valve lift range mechanism for internal combustion engine of the invention, it being capable of convenient and reliable realization cam The relative position of axis and cam sleeve is adjusted, and realizes the two-stage adjustment of valve stroke cam, it is ensured that internal combustion engine can work at the moment under optimum condition, reduce oil consumption.
Description
Technical field
The invention belongs to engine air valve lift systems technology fields, are to be related to one kind for internal combustion engine more specifically
Camshaft axial adjustment structure.
Background technique
Internal combustion engine accounts for the whole world as current thermal efficiency highest, the dynamic power machine being most widely used, the general power of sending
The 90% of power device general power used is the major consumers channel of the world oil energy.It is interior with the increase of car ownership
Combustion engine petroleum consumption will increase sharply, and contradiction between oil supply and demand is necessarily on the rise, while consuming mass energy, internal combustion engine
It is also the maximum source of atmospheric environment, especially urban air pollution, it can be seen that, internal-combustion engine technology is innovated, for section
The about energy mitigates environmental pollution and is of great significance.On the other hand, with increasingly stringent, the low row of countries in the world emission regulation
It puts and environmental protection has become the precondition that engine enters market, become the important topic that current auto industry is faced.It passes
System internal combustion engine, valve stroke are fixed and invariable, and lead to either big load or small load condition, and valve stroke opens one
Sample, causes energy waste, and the thermal efficiency is low.The defect of variable air valve lift range mechanism in the prior art: 1. structure is complicated, is two sections
Formula V VL, the solenoid valve quantity possessed is more (usually 4 or 2), and 2. make mechanism response speed slow, can not efficiently realize
Function.
Summary of the invention
The technical problems to be solved by the present invention are: it is simple to provide a kind of structure, and it is at low cost, it convenient and reliable can realize convex
The adjusting of the relative position of wheel shaft and axle sleeve realizes the two-stage adjustment of valve stroke cam, so that it is guaranteed that internal combustion engine being capable of the moment
It works under optimum condition, reduces oil consumption, improve performance, the camshaft for internal combustion engine for being conducive to save the energy is adjusted axially
Structure.
Solve the problems, such as techniques discussed above, the technical scheme adopted by the invention is as follows:
The present invention is a kind of camshaft axial adjustment structure for internal combustion engine, the cam shaft for internal combustion engine
It include cam shaft mandrel, axle sleeve A, axle sleeve B, solenoid valve to adjustment structure, the cam shaft mandrel outer surface is along the camshaft core
Outer teeth portion A and outer teeth portion B is axially arranged in axis outer surface, and interior teeth portion A, the setting of axle sleeve B inner surface is arranged in axle sleeve A inner surface
Interior teeth portion B, the solenoid valve include spool A and spool B, solenoid valve be capable of the flexible switching of control valve core A and spool B
Control unit connection, the axle sleeve A include cam pack A and adjust component A, and big cam A and small convex is arranged on cam pack A
A is taken turns, component A is adjusted and protrudes from the one end cam pack A end, component A is adjusted and is set as radial section in C character form structure, adjust
The guide part A of the outer surface component A setting protrusion, guide part A includes curvilinear guide part A guide surface I and curvilinear guiding
Portion's A guide surface II, the axle sleeve B include cam pack B and adjust component B, and big cam B and small convex is arranged on cam pack B
B is taken turns, component B is adjusted and protrudes from the one end cam pack B end, component B is adjusted and is set as radial section in C character form structure, adjust
The guide part B of the outer surface component B setting protrusion, guide part B includes curvilinear guide part B guide surface I and curvilinear guiding
Portion's B guide surface II.
The axle sleeve A is sleeved on cam shaft mandrel left end position, and axle sleeve A is sleeved on cam shaft mandrel left end position
When, the outer teeth portion A of cam shaft mandrel is configured to the structure engaged with the interior teeth portion A of axle sleeve A, and the axle sleeve A is set
It is set to the structure that can be moved axially relative to cam shaft mandrel 1；The axle sleeve B is sleeved on cam shaft mandrel right end position
It sets, when axle sleeve B is sleeved on cam shaft mandrel right part position, the outer teeth portion B of cam shaft mandrel is configured to axle sleeve B's
The structure of interior teeth portion B engagement, axle sleeve B are configured to the structure moved axially relative to cam shaft mandrel.
The axle sleeve A and axle sleeve B is configured to be set in the structure of cam shaft mandrel, and axle sleeve A and axle sleeve B divide
When not being sleeved on cam shaft mandrel, the adjusting component A binding face for adjusting component A is configured to be fitted in the tune for adjusting component B
Save the structure of component B binding face.
The guide part A guide surface I and guide part A guide surface II of the guide part A of the adjusting component A is set as in " eight "
Character form structure, the guide part B guide surface I and guide part B guide surface II of the guide part B of the adjusting component B be set as be in
"eight" shape structure.
The guide part A of the camshaft axial adjustment structure for internal combustion engine includes the face guide part A wide end and guiding
Portion's A narrow side end, guide part B include the face guide part B wide end and guide part B narrow side end, and the axle sleeve A and axle sleeve B are set with
In cam shaft mandrel, the face guide part A wide end is configured to the structure being bonded with guide part B narrow side end, guide part A narrow side end
It is configured to the structure being bonded with the face guide part B wide end.
The adjusting component A for adjusting component A return inclined-plane I and protrusion for adjusting setting protrusion on component A of the axle sleeve A
Return inclined-plane II adjusts component A return inclined-plane I and is located at guide part A leftward position, adjusts component A return inclined-plane II and is located at guiding
Portion's A right positions, the adjusting component A return inclined-plane I and cam shaft mandrel left end end face are arranged in parallel, and adjust component A and return
Position inclined-plane II and cam shaft mandrel left end end face are arranged in parallel.
The adjusting component B for adjusting component B return inclined-plane I and protrusion for adjusting setting protrusion on component B of the axle sleeve B
Return inclined-plane II adjusts component B return inclined-plane I and is located at guide part B leftward position, adjusts component B return inclined-plane II and is located at guiding
Portion's B right positions, the adjusting component B return inclined-plane I and cam shaft mandrel left end end face are arranged in parallel, and adjust component B and return
Position inclined-plane II and cam shaft mandrel left end end face are arranged in parallel.
When the cam shaft mandrel rotation of the camshaft axial adjustment structure for internal combustion engine, cam shaft mandrel setting
To be able to drive the structure that axle sleeve A and axle sleeve B are rotated synchronously relative to cam shaft mandrel, the cam shaft mandrel left outer surface
Outer teeth portion A is axially set along cam shaft mandrel, outer teeth are axially arranged along cam shaft mandrel in outer surface on the right side of cam shaft mandrel
Portion B.
When the camshaft axial adjustment structure for internal combustion engine is switched to high cam state from low cam state, control
Component processed is configured to control solenoid valves, so that with the structure that movable valve plug A stretches out, control unit control valve core A stretches out
When, under cam shaft mandrel turning effort, guide part A is contacted axle sleeve A with spool A, and axle sleeve A is arranged under spool A effect
Enough structures axially slid to the left relative to cam shaft mandrel, after the completion of the guide part A is contacted with spool A, axle sleeve B is convex
Under wheel shaft mandrel turning effort, guide part B is contacted with spool A, and axle sleeve B is configured under spool A effect relative to cam
The structure that central spindle axis axially slides to the left.
When the camshaft axial adjustment structure for internal combustion engine is switched to low cam state from high cam state, control
Component processed is configured to control solenoid valves, so that with the structure that movable valve plug B stretches out, control unit control valve core B stretches out
When, under cam shaft mandrel turning effort, guide part B is contacted axle sleeve B with spool B, and axle sleeve B is arranged under spool B effect
Enough structures axially slid to the right relative to cam shaft mandrel, after the completion of guide part B is contacted with spool B, axle sleeve A is in the camshaft core
Under axis turning effort, guide part A is contacted with spool B, and axle sleeve A is configured under spool B effect relative to cam shaft mandrel
The axial structure slid to the right.
Using technical solution of the present invention, can obtain it is below the utility model has the advantages that
Camshaft axial adjustment structure of the present invention for internal combustion engine, passes through cam shaft mandrel, axle sleeve, electromagnetism
The guide surface of valve and guide part moves towards the position of setting, the spool of solenoid valve and guide part, control unit to solenoid valve
Control opportunity setting, when engine is in different operating conditions, control unit (Engine ECU) can control different spools and stretch
Out, thus stretch out spool (spool pin shaft) and guide part A guide surface or guide part B guide surface corresponding matching, thus starting
Machine drive cam shaft mandrel is rotated and is driven in axle sleeve rotation process, and spool can act on guide part A difference guide surface or lead
It is oriented to portion's B difference, because guide portion A guide surface or guide part B guide surface are curved-surface structure, guide surface different parts
Position relative to cam shaft mandrel is different, in this way, spool acts on guide part A difference guide surface or the guidance of guide part B difference
When the different location in face, will guide not coaxial sleeve relative to cam shaft mandrel move axially.Different spools act on difference and draw
On guide face, it will be able to realize and drive the axial sliding to the left of axle sleeve or the axial function of sliding to the right.In this way, in engine development mistake
Cheng Zhong, by the way that control strategy is arranged in control unit, it will be able under the different operating conditions of engine, so that cam sleeve is not to
Equidirectional axial movement, so that being worked alternatively between the high cam (big cam) of engine or low cam (small cam), so that hair
Motivation works under optimum condition always.And the axle sleeve A is matched by the outer teeth portion A of interior teeth portion A and cam shaft mandrel
It closes, realizes suit connection, and limit axle sleeve A and be merely able to move axially relative to cam shaft mandrel, and it is relatively unrotatable.This
Sample facilitates according to engine operating condition demand and realizes while ensuring engine axle sleeve with cam shaft mandrel Positive rotational
The switching of size cam, effectively promotes the power of engine, realizes optimum condition.Two-stage of the present invention for internal combustion engine can
Air valve variation lift mechanisms, structure is simple, at low cost, is capable of the tune of the convenient and reliable relative position for realizing camshaft and cam sleeve
Section realizes that the two-stage adjustment of valve stroke cam reduces oil so that it is guaranteed that internal combustion engine can work at the moment under optimum condition
Consumption improves performance, is conducive to save the energy.
Detailed description of the invention
Brief description is made to content expressed by each attached drawing of this specification and the label in figure below:
Fig. 1 is the structural schematic diagram of the camshaft axial adjustment structure of the present invention for internal combustion engine；
Fig. 2 is the configuration schematic diagram of the camshaft axial adjustment structure of the present invention for internal combustion engine；
Fig. 3 is the spool and guide part of the solenoid valve of the camshaft axial adjustment structure of the present invention for internal combustion engine
Structural schematic diagram when cooperation；
Fig. 4 is oblique for the spool and return of the solenoid valve of the camshaft axial adjustment structure of the present invention for internal combustion engine
Structural schematic diagram when face cooperates；
Fig. 5 is the structural schematic diagram of the axle sleeve A of the camshaft axial adjustment structure of the present invention for internal combustion engine；
Fig. 6 a is that the spool A pin shaft of the solenoid valve of the camshaft axial adjustment structure of the present invention for internal combustion engine is opened
Begin to act on structural schematic diagram when guide part B；
Fig. 6 b is that the spool A pin shaft of the solenoid valve of the camshaft axial adjustment structure of the present invention for internal combustion engine is made
Used in guide part B drive valve pocket B move to right after structural schematic diagram；
Fig. 6 c is that the spool A pin shaft of the solenoid valve of the camshaft axial adjustment structure of the present invention for internal combustion engine is made
Used in guide part A drive valve pocket A move to right after structural schematic diagram；
Fig. 6 d is that the spool A pin shaft of the solenoid valve of the camshaft axial adjustment structure of the present invention for internal combustion engine is made
With the structural schematic diagram on adjusting component B return inclined-plane I when return；
Appended drawing reference: 1, cam shaft mandrel；2, axle sleeve A；3, axle sleeve B；4, solenoid valve；7, guide part A；9, spool A；10,
Spool B；11, cam pack A；12, component A is adjusted；13, big cam A；14, small cam A；15, guide part A guide surface I；16, it leads
To portion's A guide surface II；17, cam pack B；18, component B is adjusted；19, big cam B；20, small cam B；21, guide part B；22,
Guide part B guide surface I；23, guide part B guide surface II；24, component A binding face is adjusted；25, component B binding face is adjusted；26, it leads
To portion, end, the face A wide；27, guide part A narrow side end；28, the face guide part B wide end；29, guide part B narrow side end；30, component A is adjusted to return
Position inclined-plane I；31, component A return inclined-plane II is adjusted；32, component B return inclined-plane I is adjusted；33, component B return inclined-plane II is adjusted.
Specific embodiment
Below against attached drawing, by the description of the embodiment, to for example related each structure of a specific embodiment of the invention
The works such as the shape of part, construction, the mutual alignment between each section and connection relationship, the effect of each section and working principle are further
Detailed description:
As shown in attached drawing 1- attached drawing 6d, the present invention is a kind of camshaft axial adjustment structure for internal combustion engine, described
Camshaft axial adjustment structure for internal combustion engine includes cam shaft mandrel 1, axle sleeve A2, axle sleeve B3, solenoid valve 4, and described is convex
Outer teeth portion A5 and outer teeth portion B6, axle sleeve A2 inner surface is axially arranged along 1 outer surface of cam shaft mandrel in 1 outer surface of wheel shaft mandrel
Interior teeth portion B is arranged in teeth portion A in being arranged, axle sleeve B3 inner surface, and the solenoid valve 4 includes spool A9 and spool B10, electromagnetism
Valve 4 is connect with the control unit for capableing of the flexible switching of control valve core A9 and spool B10, and the axle sleeve A2 includes cam pack
Big cam A13 and small cam A14 is set on A11 and adjusting component A12, cam pack A11, adjusts component A12 and protrudes from cam
The one end component A11 end adjusts component A12 and is set as radial section in C character form structure, it is convex to adjust the setting of the outer surface component A12
The guide part A7 risen, guide part A7 include curvilinear guide part A guide surface I 15 and curvilinear guide part A guide surface II 16,
The axle sleeve B3 includes cam pack B17 and adjusts component B18, and big cam B19 and small cam is arranged on cam pack B17
B20 adjusts component B18 and protrudes from the one end cam pack B17 end, adjusts component B18 and is set as radial section in C font knot
Structure adjusts the guide part B21 of the outer surface component B18 setting protrusion, and guide part B21 includes curvilinear guide part B guide surface I 22
With curvilinear guide part B guide surface II 23.Above structure passes through cam shaft mandrel, axle sleeve, solenoid valve and guide part
Guide surface moves towards setting, the position of the spool of solenoid valve and guide part, control unit are set to control opportunity of solenoid valve
It sets, when engine is in different operating conditions, control unit (Engine ECU) can control different spools and stretch out, thus stretch out
Spool (spool pin shaft) and guide part A guide surface or guide part B guide surface corresponding matching, thus in engine driven cam central spindle
Axis is rotated and is driven in axle sleeve rotation process, and spool can act on guide part A difference guide surface or guide part B difference guiding,
Because guide portion A guide surface or guide part B guide surface are curved-surface structure, guide surface different parts are relative to the camshaft core
The position of axis is different, in this way, when spool acts on the different location of guide part A difference guide surface or guide part B difference guide surface,
Will guide not coaxial sleeve relative to cam shaft mandrel move axially.Different spools act in different guide surfaces, it will be able to real
Now drive the axial sliding to the left of axle sleeve or the axial function of sliding to the right.In this way, in engine development process, by controlling
Control strategy is set in component, it will be able under the different operating conditions of engine, so that cam sleeve is moved axially to different directions,
So that being worked alternatively between the high cam (big cam) of engine or low cam (small cam), so that engine is always in best work
It works under condition.And the axle sleeve A is cooperated by the outer teeth portion A5 of interior teeth portion A31 and cam shaft mandrel 1, realizes set load
It connects, and limits axle sleeve A and be merely able to move axially relative to cam shaft mandrel, and it is relatively unrotatable.In this way, ensuring to start
While arbor set is with cam shaft mandrel Positive rotational, facilitates according to engine operating condition demand and realizes that size cam switches,
The power for effectively promoting engine, realizes optimum condition.Two-stage variable valve stroke machine of the present invention for internal combustion engine
Structure, structure is simple, is capable of the adjusting of the convenient and reliable relative position for realizing camshaft and cam sleeve, realizes valve stroke cam
Two-stage adjustment reduce oil consumption so that it is guaranteed that internal combustion engine can work at the moment under optimum condition, improve performance, be conducive to save
Save the energy.
The axle sleeve A2 is sleeved on 1 left end position of cam shaft mandrel, and axle sleeve A2 is sleeved on 1 left part of cam shaft mandrel
When position, the outer teeth portion A of cam shaft mandrel 1 is configured to the structure engaged with the interior teeth portion A of axle sleeve A2, the axis
Set A2 is configured to the structure moved axially relative to cam shaft mandrel 1；It is right that the axle sleeve B3 is sleeved on cam shaft mandrel 1
End position, when axle sleeve B3 is sleeved on 1 right part position of cam shaft mandrel, the outer teeth portion B of cam shaft mandrel 1 is configured to
The structure engaged with the interior teeth portion B of axle sleeve B3, axle sleeve B3 are configured to the knot moved axially relative to cam shaft mandrel 1
Structure.
The axle sleeve A2 and axle sleeve B3 is configured to be set in the structure of cam shaft mandrel 1, axle sleeve A2 and axis
When set B3 is set in cam shaft mandrel 1, the adjusting component A binding face 24 for adjusting component A12 is configured to be fitted in tune
Save the structure of the adjusting component B binding face 25 of component B18.Above structure is set in camshaft in axle sleeve A2 and axle sleeve B3
When mandrel 1, adjusts component A and adjust component B one circular configuration of formation, in this way, when control unit control valve core is stretched out,
After cam shaft mandrel drives one circle of axle sleeve A and axle sleeve B rotation, which can be simultaneously through overregulating the guide part A of component A and tune
The guide part B of component B is saved, thus successively two axle sleeves is driven successively to move axially, it is reliable to realize that axial position is adjusted.
The guide part A guide surface I 15 and guide part A guide surface II 16 of the guide part A14 of the adjusting component A12 is arranged
For in "eight" shape structure, the guide part B guide surface I 22 and guide part B guiding of the guide part B21 of the adjusting component B18
Face II 23 is set as in "eight" shape structure.Above structure, the structure setting of the guide part A14 of " eight ", so that two sides guide surface
It is curved-surface structure, so as to reliably reliable with spool, realization axle sleeve A axial movement control.The knot of the guide part B21 of " eight "
Structure setting, so that two sides guide surface is curved-surface structure, so as to reliably reliable with spool, realization axle sleeve A axial movement control
System.
The guide part A14 of the camshaft axial adjustment structure for internal combustion engine includes 26 He of the face guide part A wide end
Guide part A narrow side end 27, guide part B21 include the face guide part B wide end 28 and guide part B narrow side end 29, the axle sleeve A2 and
When axle sleeve B3 is set in cam shaft mandrel 1, the face guide part A wide end 26 is configured to be bonded with guide part B narrow side end 29
Structure, guide part A narrow side end 27 is configured to the structure being bonded with the face guide part B wide end 28.Above structure, guide part A
Guide surface be actually together along adjusting mono- circumferential direction of component A through the entire structure for adjusting component A, and it is every to adjust component A
A end face is bonded with adjusting mono- corresponding end surface of component B respectively, in this way, to adjust component A and adjusting round and smooth mistake between component B
Degree, convenient for when cam shaft mandrel drives axle sleeve A and axle sleeve B to rotate, it is reliable it is accessible realize different spools adjust component A and
Adjust the sliding switching between component B, it is ensured that spool will not relative to guide surface movement when cam shaft mandrel drives axle sleeve rotation
It is hindered, so as to conveniently be switched to adjusting component.The guide surface of guide part B is actually together along adjusting component B mono-
Circumferential direction through the entire structure for adjusting component B, in this way, to adjust component A and adjust between component B it is round and smooth excessively, be convenient for
It is reliably accessible to realize that different spools are adjusting component A and adjusting group when cam shaft mandrel drives axle sleeve A and axle sleeve B to rotate
Sliding switching between part B, it is ensured that spool not will receive resistance relative to guide surface movement when cam shaft mandrel drives axle sleeve rotation
Hinder, so as to conveniently be switched to adjusting component, meets work requirements.
The adjusting for adjusting component A return inclined-plane I 30 and protrusion for adjusting setting protrusion on component A12 of the axle sleeve A2
Component A return inclined-plane II 31 adjusts component A return inclined-plane I 30 and is located at guide part A14 leftward position, adjusts component A return inclined-plane
II 31 are located at guide part A14 right positions, and the adjusting component A return inclined-plane I 30 is parallel with 1 left end end face of cam shaft mandrel
Arrangement adjusts component A return inclined-plane II 31 and 1 left end end face of cam shaft mandrel and is arranged in parallel.Above structure, each adjusting component
A return inclined-plane is used for the return of a spool.Spool movement when, when spool act on corresponding guide surface complete axle sleeve A with
It after the axial movement of axle sleeve B, is driven in axle sleeve rotation process in camshaft pin shaft, corresponding spool can be set by corresponding protrusion
It sets and is adjusting the return inclined-plane on component, the contraction of return slope driving spool is returned to initial position.In this way, avoiding spool can not
Return influences to work normally, and improves reliability.
The adjusting for adjusting component B return inclined-plane I 32 and protrusion for adjusting setting protrusion on component B18 of the axle sleeve B3
Component B return inclined-plane II 33 adjusts component B return inclined-plane I 32 and is located at guide part B21 leftward position, adjusts component B return inclined-plane
II 33 are located at guide part B21 right positions, and the adjusting component B return inclined-plane I 32 is parallel with 1 left end end face of cam shaft mandrel
Arrangement adjusts component B return inclined-plane II 33 and 1 left end end face of cam shaft mandrel and is arranged in parallel.Above structure, each adjusting component
B return inclined-plane is used for the return of a spool.Spool movement when, when spool act on corresponding guide surface complete axle sleeve A with
It after the axial movement of axle sleeve B, is driven in axle sleeve rotation process in camshaft pin shaft, corresponding spool can be set by corresponding protrusion
It sets and is adjusting the return inclined-plane on component, the contraction of return slope driving spool is returned to initial position.In this way, avoiding spool can not
Return influences to work normally, and improves reliability.
When the cam shaft mandrel 1 of the camshaft axial adjustment structure for internal combustion engine rotates, cam shaft mandrel 1 is set
It is set to and is able to drive the structure that axle sleeve A2 and axle sleeve B3 are rotated synchronously relative to cam shaft mandrel 1,1 left side of cam shaft mandrel
Along the axial outer teeth portion A of setting of cam shaft mandrel 1,1 right side outer surface of cam shaft mandrel is axially set along cam shaft mandrel 1 for outer surface
Set outer teeth portion B.Above structure, cam shaft mandrel is for driving axle sleeve A and axle sleeve B to rotate synchronously, the cam shaft mandrel
For each revolution, the primary switching of two axle sleeves is completed.
When the camshaft axial adjustment structure for internal combustion engine is switched to high cam state from low cam state, control
Component processed is configured to control solenoid valve 4 and is powered, so that with the structure that movable valve plug A9 stretches out, control unit control valve core A9 stretches
When out, under 1 turning effort of cam shaft mandrel, guide part A7 is contacted axle sleeve A2 with spool A9, and axle sleeve A2 is under spool A9 effect
It is configured to relative to the axial structure slid to the left of cam shaft mandrel 1, the guide part A7 contacts completion with spool A9
Afterwards, under 1 turning effort of cam shaft mandrel, guide part B21 is contacted axle sleeve B3 with spool A9, and axle sleeve B3 is divided into spool A9 effect
Being set to can be relative to the axial structure slid to the left of cam shaft mandrel 1.Above structure, each spool is under control unit control
After stretching, a guide surface of axle sleeve A and a guide surface of axle sleeve B can be successively acted on, to drive axle sleeve A and axle sleeve B
It is successively axially slid to a direction, to realize the switching of big cam and small cam state, effectively adapts to the work of engine
Duty requirements.
When the camshaft axial adjustment structure for internal combustion engine is switched to low cam state from high cam state, control
Component processed is configured to control solenoid valve 4 and is powered, thus with the structure that movable valve plug B10 stretches out, control unit control valve core B10
When stretching, under 1 turning effort of cam shaft mandrel, guide part B21 is contacted axle sleeve B3 with spool B10, and axle sleeve B3 makees in spool B10
It is configured under relative to the axial structure slid to the right of cam shaft mandrel 1, guide part B21 contacts completion with spool B10
Afterwards, under 1 turning effort of cam shaft mandrel, guide part A7 is contacted axle sleeve A2 with spool B10, and axle sleeve A2 is under spool B10 effect
It is configured to relative to the axial structure slid to the right of cam shaft mandrel 1.Above structure, each spool are controlled in control unit
After lower stretching, a guide surface of axle sleeve A and a guide surface of axle sleeve B can be successively acted on, to drive axle sleeve A and axle sleeve
B successively axially slides to a direction, realizes the switching of big cam and small cam state, effectively adapts to the work operating condition of engine
Demand.
Camshaft axial adjustment structure of the present invention for internal combustion engine, axle sleeve and cam shaft mandrel are matched by spline
It closes (having external splines on cam shaft mandrel outer surface, have internal spline in axle sleeve).When the rotation of engine driven cam central spindle axis, lead to
Spline drived is crossed, axle sleeve and the sad synchronous rotary of camshaft are made.The open and close of cam pack control valve on axle sleeve.This hair
Bright working principle is: solenoid valves control corresponding spool and stretch out, and axle sleeve is under the turning effort of cam shaft mandrel, guiding
The guide surface in portion is contacted with spool, and under the action of spool, successively driving two axle sleeves, first a backward direction is axially slid, and is made
Camshaft completes the switching between high cam and low cam.Needing two axle sleeves, first backward other direction slides axially, and only needs
Control unit controls the stretching of another spool, can act on other direction, realizes the control that slides axially.
Camshaft axial adjustment structure of the present invention for internal combustion engine, passes through cam shaft mandrel, axle sleeve, electromagnetism
The guide surface of valve and guide part moves towards the position of setting, the spool of solenoid valve and guide part, control unit to solenoid valve
Control opportunity setting, when engine is in different operating conditions, control unit (Engine ECU) can control different spools and stretch
Out, thus stretch out spool (spool pin shaft) and guide part A guide surface or guide part B guide surface corresponding matching, thus starting
Machine drive cam shaft mandrel is rotated and is driven in axle sleeve rotation process, and spool can act on guide part A difference guide surface or lead
It is oriented to portion's B difference, because guide portion A guide surface or guide part B guide surface are curved-surface structure, guide surface different parts
Position relative to cam shaft mandrel is different, in this way, spool acts on guide part A difference guide surface or the guidance of guide part B difference
When the different location in face, will guide not coaxial sleeve relative to cam shaft mandrel move axially.Different spools act on difference and draw
On guide face, it will be able to realize and drive the axial sliding to the left of axle sleeve or the axial function of sliding to the right.In this way, in engine development mistake
Cheng Zhong, by the way that control strategy is arranged in control unit, it will be able under the different operating conditions of engine, so that cam sleeve is not to
Equidirectional axial movement, so that being worked alternatively between the high cam (big cam) of engine or low cam (small cam), so that hair
Motivation works under optimum condition always.And the axle sleeve A is matched by the outer teeth portion A of interior teeth portion A and cam shaft mandrel
It closes, realizes suit connection, and limit axle sleeve A and be merely able to move axially relative to cam shaft mandrel, and it is relatively unrotatable.This
Sample facilitates according to engine operating condition demand and realizes while ensuring engine axle sleeve with cam shaft mandrel Positive rotational
The switching of size cam, effectively promotes the power of engine, realizes optimum condition.Two-stage of the present invention for internal combustion engine can
Air valve variation lift mechanisms, structure is simple, at low cost, is capable of the tune of the convenient and reliable relative position for realizing camshaft and cam sleeve
Section realizes that the two-stage adjustment of valve stroke cam reduces oil so that it is guaranteed that internal combustion engine can work at the moment under optimum condition
Consumption improves performance, is conducive to save the energy.
Above in conjunction with attached drawing, an exemplary description of the invention, it is clear that concrete implementation of the present invention is not by above-mentioned
The limitation of mode, as long as using the various improvement that the inventive concept and technical scheme of the present invention carry out, or not improved by this
The conception and technical scheme of invention directly apply to other occasions, are within the scope of the invention.
Claims (10)
1. a kind of camshaft axial adjustment structure for internal combustion engine, it is characterised in that: the camshaft for internal combustion engine
Axial adjustment structure includes cam shaft mandrel (1), axle sleeve A (2), axle sleeve B (3), solenoid valve (4), the cam shaft mandrel (1)
Outer surface is along cam shaft mandrel (1) outer surface axial direction outer teeth portion A and outer teeth portion B of setting, axle sleeve A (2) inner surface setting
Interior teeth portion B is arranged in teeth portion A, axle sleeve B (3) inner surface, and the solenoid valve (4) includes spool A (9) and spool B (10), electricity
Magnet valve (4) is connect with the control unit for capableing of the flexible switching of control valve core A (9) and spool B (10), and the axle sleeve A (2) includes
Cam pack A (11) and component A (12) are adjusted, setting big cam A (13) and small cam A (14) on cam pack A (11), adjusting
Component A (12) protrudes from cam pack A (11) one end end, and adjusting component A (12) and being set as radial section is in C character form structure,
The guide part A (7) of (12) outer surface component A setting protrusion is adjusted, guide part A (7) includes curvilinear guide part A guide surface I
(15) and curvilinear guide part A guide surface II (16), the axle sleeve B (3) include cam pack B (17) and adjusting component B
(18), big cam B (19) and small cam B (20) are set on cam pack B (17), adjusts component B (18) and protrudes from cam pack B
(17) one end end adjusts component B (18) and is set as radial section in C character form structure, it is convex to adjust the setting of (18) outer surface component B
The guide part B (21) risen, guide part B (21) includes that curvilinear guide part B guide surface I (22) and curvilinear guide part B are led
To face II (23).
2. the camshaft axial adjustment structure according to claim 1 for internal combustion engine, it is characterised in that: the axle sleeve
A (2) is sleeved on cam shaft mandrel (1) left end position, convex when axle sleeve A (2) is sleeved on cam shaft mandrel (1) left end position
The outer teeth portion A of wheel shaft mandrel (1) is configured to the structure engaged with the interior teeth portion A of axle sleeve A (2), the axle sleeve A
(2) it is configured to the structure moved axially relative to cam shaft mandrel (1)；The axle sleeve B (3) is sleeved on cam shaft mandrel
(1) right part position, when axle sleeve B (3) is sleeved on cam shaft mandrel (1) right part position, the outer teeth portion of cam shaft mandrel (1)
B is configured to the structure engaged with the interior teeth portion B of axle sleeve B (3), and axle sleeve B (3) is configured to relative to cam shaft mandrel
(1) structure moved axially.
3. the camshaft axial adjustment structure according to claim 1 or 2 for internal combustion engine, it is characterised in that: axle sleeve A
(2) and axle sleeve B (3) is configured to be set in the structure of cam shaft mandrel (1), and axle sleeve A (2) and axle sleeve B (3) cover respectively
When mounted in cam shaft mandrel (1), the adjusting component A binding face (24) for adjusting component A (12) is configured to be fitted in adjusting group
The structure of the adjusting component B binding face (25) of part B (18).
4. the camshaft axial adjustment structure according to claim 1 or 2 for internal combustion engine, it is characterised in that: described
The guide part A guide surface I (15) and guide part A guide surface II (16) for adjusting the guide part A (14) of component A (12) are set as
"eight" shape structure, the guide part B guide surface I (22) and guide part B of the guide part B (21) of the adjusting component B (18) are led
It is set as to face II (23) in "eight" shape structure.
5. the camshaft axial adjustment structure according to claim 1 or 2 for internal combustion engine, it is characterised in that: described
The guide part A (14) of camshaft axial adjustment structure for internal combustion engine includes the face guide part A wide end (26) and guide part A leptoprosopy
It holds (27), guide part B (21) includes the face guide part B wide end (28) and guide part B narrow side end (29), the axle sleeve A (2) and axis
When set B (3) is set in cam shaft mandrel (1), the face guide part A wide end (26) is configured to and guide part B narrow side end
(29) structure being bonded, guide part A narrow side end (27) are configured to the structure being bonded with the face guide part B wide end (28).
6. the camshaft axial adjustment structure according to claim 1 or 2 for internal combustion engine, it is characterised in that: described
The adjusting component A on adjusting component A return inclined-plane I (30) and protrusion that protrusion is arranged on the adjusting component A (12) of axle sleeve A (2) is returned
Position inclined-plane II (31) adjusts component A return inclined-plane I (30) and is located at guide part A (14) leftward position, adjusts component A return inclined-plane
II (31) are located at guide part A (14) right positions, the adjusting component A return inclined-plane I (30) and cam shaft mandrel (1) left end
End face parallel arrangement, adjusts component A return inclined-plane II (31) and cam shaft mandrel (1) left end end face is arranged in parallel.
7. the camshaft axial adjustment structure according to claim 1 or 2 for internal combustion engine, it is characterised in that: described
The adjusting component B on adjusting component B return inclined-plane I (32) and protrusion that protrusion is arranged on the adjusting component B (18) of axle sleeve B (3) is returned
Position inclined-plane II (33) adjusts component B return inclined-plane I (32) and is located at guide part B (21) leftward position, adjusts component B return inclined-plane
II (33) are located at guide part B (21) right positions, the adjusting component B return inclined-plane I (32) and cam shaft mandrel (1) left end
End face parallel arrangement, adjusts component B return inclined-plane II (33) and cam shaft mandrel (1) left end end face is arranged in parallel.
8. the camshaft axial adjustment structure according to claim 1 or 2 for internal combustion engine, it is characterised in that: described
When cam shaft mandrel (1) rotation of the camshaft axial adjustment structure for internal combustion engine, cam shaft mandrel (1) is configured to band
The structure that moving axis set A (2) and axle sleeve B (3) are rotated synchronously relative to cam shaft mandrel (1), cam shaft mandrel (1) left side are outer
Outer teeth portion A is axially arranged along cam shaft mandrel (1) in surface, and outer surface is along cam shaft mandrel (1) axis on the right side of cam shaft mandrel (1)
The teeth portion B to outside setting.
9. the camshaft axial adjustment structure according to claim 1 or 2 for internal combustion engine, it is characterised in that: described
When camshaft axial adjustment structure for internal combustion engine is switched to high cam state from low cam state, control unit is arranged to
Enough control solenoid valve (4) is powered, thus with the structure that movable valve plug A (9) are stretched out, when control unit control valve core A (9) stretches out, axis
A (2) are covered under cam shaft mandrel (1) turning effort, and guide part A (7) is contacted with spool A (9), and axle sleeve A (2) makees in spool A (9)
The structure axially slid to the left relative to cam shaft mandrel (1), the guide part A (7) and spool A are configured under
(9) after the completion of contacting, axle sleeve B (3) is under cam shaft mandrel (1) turning effort, and guide part B (21) is contacted with spool A (9), axis
Set B (3) is configured to the structure axially slid to the left relative to cam shaft mandrel (1) under spool A (9) effect.
10. the camshaft axial adjustment structure according to claim 1 or 2 for internal combustion engine, it is characterised in that: described
When camshaft axial adjustment structure for internal combustion engine is switched to low cam state from high cam state, control unit is arranged to
Enough control solenoid valve (4) is powered, thus with the structure that movable valve plug B (10) are stretched out, when control unit control valve core B (10) stretches out,
Under cam shaft mandrel (1) turning effort, guide part B (21) is contacted axle sleeve B (3) with spool B (10), and axle sleeve B (3) is in spool B
(10) structure axially slid to the right relative to cam shaft mandrel (1), guide part B (21) and spool B are configured under acting on
(10) after the completion of contacting, axle sleeve A (2) is under cam shaft mandrel (1) turning effort, and guide part A (7) is contacted with spool B (10), axis
Set A (2) is configured to the structure axially slid to the right relative to cam shaft mandrel (1) under spool B (10) effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910401229.9A CN110131010B (en) | 2019-05-15 | 2019-05-15 | Axial camshaft adjusting structure for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910401229.9A CN110131010B (en) | 2019-05-15 | 2019-05-15 | Axial camshaft adjusting structure for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110131010A true CN110131010A (en) | 2019-08-16 |
| CN110131010B CN110131010B (en) | 2020-12-01 |
Family
ID=67574077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910401229.9A Active CN110131010B (en) | 2019-05-15 | 2019-05-15 | Axial camshaft adjusting structure for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110131010B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070178731A1 (en) * | 2004-02-21 | 2007-08-02 | Schaeffler Kg | Valve train with cam switching for the gas exchange valves of a four-cycle internal combustion engine |
| CN101784759A (en) * | 2007-08-10 | 2010-07-21 | 戴姆勒股份公司 | Internal combustion engine valve drive switching device |
| CN103380273A (en) * | 2011-02-17 | 2013-10-30 | 戴姆勒股份公司 | Internal combustion engine valve train device |
| DE102013020940A1 (en) * | 2013-12-12 | 2014-08-14 | Daimler Ag | Valve drive device for internal combustion engine of motor vehicle, provides an engine start timing cam curve with which maximum adjustment is carried out for the engine start through a camshaft adjuster |
| WO2017170923A1 (en) * | 2016-03-31 | 2017-10-05 | 本田技研工業株式会社 | Variable valve device |
-
2019
- 2019-05-15 CN CN201910401229.9A patent/CN110131010B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070178731A1 (en) * | 2004-02-21 | 2007-08-02 | Schaeffler Kg | Valve train with cam switching for the gas exchange valves of a four-cycle internal combustion engine |
| CN101784759A (en) * | 2007-08-10 | 2010-07-21 | 戴姆勒股份公司 | Internal combustion engine valve drive switching device |
| CN103380273A (en) * | 2011-02-17 | 2013-10-30 | 戴姆勒股份公司 | Internal combustion engine valve train device |
| DE102013020940A1 (en) * | 2013-12-12 | 2014-08-14 | Daimler Ag | Valve drive device for internal combustion engine of motor vehicle, provides an engine start timing cam curve with which maximum adjustment is carried out for the engine start through a camshaft adjuster |
| WO2017170923A1 (en) * | 2016-03-31 | 2017-10-05 | 本田技研工業株式会社 | Variable valve device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110131010B (en) | 2020-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101429882B (en) | Continuous variable air valve lift apparatus | |
| US8701608B2 (en) | Variable valve lift system for an internal combustion engine | |
| CN204082245U (en) | The electrodeless variable valve gear of a kind of motor | |
| CN108757085A (en) | A kind of lift range variable structure and its control method | |
| CN102852581A (en) | Variable valve timing device | |
| CN110145381A (en) | A kind of lockable mechanism applied to internal-combustion engine variable valve lift system | |
| CN110159386B (en) | Two-stage variable valve lift mechanism of internal combustion engine | |
| CN102486101B (en) | Variable valve driving apparatus | |
| CN110131010A (en) | A kind of camshaft axial adjustment structure for internal combustion engine | |
| CN204476491U (en) | A kind of continuous variable valve timing apparatus | |
| CN110005496A (en) | Two-stage variable air valve lift range mechanism for internal combustion engine | |
| CN110131009A (en) | A kind of two-stage variable air valve lift range mechanism for internal combustion engine | |
| CN110005498A (en) | A kind of two-stage variable air valve lift range mechanism for internal combustion engine | |
| CN102966391B (en) | Swinging arm mechanism controlled by using double cams | |
| CN202970840U (en) | Gear rack rocker arm type variable valve lift mechanism of engine | |
| CN110043340A (en) | A kind of VVL camshaft locking structure for internal combustion engine | |
| CN110005497B (en) | Three-stage variable valve lift mechanism for internal combustion engine | |
| CN110067612A (en) | A kind of three-level variable air valve lift range mechanism for internal combustion engine | |
| CN208669372U (en) | A kind of lift range variable structure | |
| CN102943699B (en) | Cam rocker arm mechanism for internal combustion engine | |
| CN110005495B (en) | Three-stage variable valve lift structure of internal combustion engine | |
| CN101446217A (en) | Air distribution mechanism with variable valve lift | |
| CN204532458U (en) | Motor decompression starting system | |
| CN107387190B (en) | Swing type variable valve driving device | |
| CN104612777A (en) | Consecutive variable valve timing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |