CN110159385A - A kind of engine valve timing and lift variset and its control method simultaneously - Google Patents
A kind of engine valve timing and lift variset and its control method simultaneously Download PDFInfo
- Publication number
- CN110159385A CN110159385A CN201910561262.8A CN201910561262A CN110159385A CN 110159385 A CN110159385 A CN 110159385A CN 201910561262 A CN201910561262 A CN 201910561262A CN 110159385 A CN110159385 A CN 110159385A
- Authority
- CN
- China
- Prior art keywords
- pushing mechanism
- engine
- sliding slot
- lift
- valve
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
-
- 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
- F01L13/0021—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 by modification of rocker arm ratio
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/34423—Details relating to the hydraulic feeding circuit
- F01L2001/34426—Oil control valves
-
- 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
Abstract
The invention discloses a kind of engine valve timing and lift while varisets, comprising: inlet valve；Return spring is set on valve stem；One end of return spring is resisted against limiting block on piece, and the other end is resisted against on motor body；Pushing mechanism is fixedly mounted in engine shell body, and the installation direction of pushing mechanism is vertical with valve stem；Ring is pushed, is fixedly connected with moveable one end of pushing mechanism, pushes in ring and is provided with first sliding groove；Hydraulic tappet is fixedly mounted in engine shell body；Rocker arm, one end is hinged with hydraulic tappet, and the side of the other end is resisted against the end of valve stem；And second sliding slot is provided in rocker arm；Wherein, there is angle between the axis of first sliding groove and the axis of second sliding slot；Cam is driven by engine crankshaft；Pin shaft, matching is arranged in first sliding groove and second sliding slot, and and cam contact.The present invention also provides engine valve timing and lift while the control methods of variset.
Description
Technical field
The invention belongs to technical field of automobile engine, in particular to a kind of engine valve timing and lift can be changed simultaneously
Device and its control method.
Background technique
The function of valve actuating mechanism is according to the requirement of the working cycles and ignition order carried out in each cylinder of engine, timing
Inlet and exhaust valve is opened and closed, fresh charge (gasoline engine combustion mixture, diesel engine are air) is made to timely enter cylinder, and
Exhaust gas is discharged from cylinder in time.Fresh charge is inhaled into that cylinder is more, then the power that engine may issue is bigger.Charge system
Number is higher, shows, heat that combustion mixture when burning release more into the fresh air of cylinder or the quality of combustion mixture
Amount is bigger, then the power that engine issues is bigger.For the engine of certain swept volume, coefficient of charge and air inlet end
When cylinder in pressure and temperature it is related.Pressure is higher at this time, and temperature is lower, then the gaseous mass of a constant volume is bigger, therefore
Coefficient of charge is higher.Due to cylinder interior gas pressure reduction when resistance of the gas handling system to air-flow causes air inlet end of a period, and by
Remain in the hot parts such as high-temp waste gas and combustion chamber, piston top, valve in cylinder in Yu Shangyi circulation to entering cylinder
The heating of interior live gas, the temperature of gas increases when air inlet being made to end, and the live gas quality for being actually filled with cylinder is always small
In the live gas quality for being full of displacement under air-suction state.
Conventional engines since mechanical structure is fixed, also just decide by the valve timing of engine, operates in engine
It can not change in the process.However, the height of engine speed is to have to intake and exhaust flowing and engine combustion process
It influences.When revolving speed is high, induction air flow ratio is high, and inertia energy is big, it is desirable that inlet valve is opened earlier, evening a little closings are more as far as possible
Into some gaseous mixtures or air；Otherwise when engine speed is lower, induction air flow ratio is low, and inertia energy is also small, if inlet valve
It opens too early, since piston is just being vented in uplink at this time, it is easy to live gas be squeezed out cylinder, reduce air inlet instead, sent out
Motivation work more tends to unstable.Therefore in the slow-speed of revolution, it is desirable to which engine intake valve slightly evening opens.So engine turns
When fast different, the requirement to valve timing is different.Therefore in order to meet under different rotating speeds each inlet valve to timing and lift
Requirement, improve the economy and dynamic property of engine, need a variable valve timing lift device.
Summary of the invention
The present invention provides a kind of engine valve timing and lift while varisets, and the purpose is to overcome existing start
Machine can not change simultaneously the shortcomings that IO Intake Valve Opens time and inlet valve lift.
The present invention provides a kind of engine valve timing and lift while the control methods of variset, and the purpose is to roots
According to engine speed, the extension elongation of pushing mechanism is controlled, to change opening time and the inlet valve lift of inlet valve.
Technical solution provided by the invention are as follows:
A kind of engine valve timing and lift variset simultaneously, comprising:
Inlet valve comprising the head portion that and valve stem being fixedly connected；
Wherein, the valve stem movably passes through motor body, and extend into the engine shell body；
Return spring is set on the valve stem；
Wherein, the end of the valve stem is provided with limit baffle along the circumferential direction of the valve stem；The return spring
One end is resisted against the limiting block on piece, and the other end is resisted against on the motor body；
Pushing mechanism is fixedly mounted in the engine shell body, and the installation direction of the pushing mechanism and institute
It is vertical to state valve stem；
Ring is pushed, is fixedly connected with moveable one end of the pushing mechanism, is provided with first in the promotion ring
Sliding slot；
Hydraulic tappet is fixedly mounted in the engine shell body；
Rocker arm, one end and the hydraulic tappet are hinged, and the side of the other end is resisted against the end of the valve stem；And
Second sliding slot is provided in the rocker arm；
Wherein, there is angle between the axis of the first sliding groove and the axis of the second sliding slot；
Cam is driven by engine crankshaft；
Wherein, the inlet valve and the cam are located at the two sides of the second sliding slot；
Pin shaft, matching setting lean in the first sliding groove and the second sliding slot, and with the cam；
Wherein, the pin shaft can the first sliding groove described in the extruding lower edge of the cam move back and forth, and the pin
Axis second sliding slot reciprocating motion described in the promotion lower edge for pushing ring.
Preferably, the second sliding slot is arc, and the cam is arranged in the concave side of the second sliding slot, it is described into
The convex side of the second sliding slot is arranged in valve.
Preferably, variset further includes simultaneously for the engine valve timing and lift；
First buffer spring, one end are fixedly connected on the pin shaft, and the other end is fixedly connected on the second sliding slot
One end；And
Second buffer spring, one end are fixedly connected on the pin shaft, and the other end is fixedly connected on the second sliding slot
The other end.
Preferably, the pushing mechanism and the hydraulic tappet are installed respectively close to the both ends of the second sliding slot.
Preferably, lock position there are four the pushing mechanism tools, and the corresponding pushing mechanism in four lock positions
The relationship of extension elongation are as follows:
L1< L2< L3< L4；
Wherein, L1For the extension elongation of the corresponding pushing mechanism in the first lock position；L2It is pushed away for the second lock position is corresponding
The extension elongation of motivation structure；L3For the extension elongation of the corresponding pushing mechanism in third lock position；L4It is corresponding for the 4th lock position
Pushing mechanism extension elongation.
Preferably, one end of the rocker arm is fixedly connected with the first articulated section, is provided with second on the hydraulic tappet
Articulated section；
Wherein, first articulated section is sphere, has spherical cavity inside second articulated section；Described first is hinged
Portion can be freely rotated in second articulated section.
A kind of engine valve timing and lift variset simultaneously, comprising:
Two inlet valves, the inlet valve include the head portion that being fixedly connected and valve stem；
Wherein, the valve stem movably passes through motor body, and extend into the engine shell body；
Two return springs are respectively sleeved on two valve stems；
Wherein, the end of the valve stem is provided with limit baffle along the circumferential direction of the valve stem；The return spring
One end is resisted against the limiting block on piece, and the other end is resisted against on the motor body；
Pushing mechanism is fixedly mounted in the engine shell body, and the installation direction of the pushing mechanism and institute
It is vertical to state valve stem；
Two promotion rings, are fixedly connected with moveable one end of the pushing mechanism, are provided in the promotion ring
First sliding groove；
Two hydraulic tappets are fixedly mounted in the engine shell body；
Two rocker arms are symmetricly set on the two sides of the pushing mechanism, and respectively close to two promotion rings；Two
One end of a rocker arm is hinged with two hydraulic tappets respectively, and the side of the other end is born against in two valves
The end of bar；And second sliding slot is provided in the rocker arm；
Wherein, there is angle between the axis of the first sliding groove and the axis of the second sliding slot；
Cam is driven by engine crankshaft；
Wherein, the inlet valve and the cam are located at the two sides of the second sliding slot；
Pin shaft, matching setting lean in the first sliding groove and the second sliding slot, and with the cam；
Wherein, the pin shaft can the first sliding groove described in the extruding lower edge of the cam move back and forth, and the pin
Axis second sliding slot reciprocating motion described in the promotion lower edge for pushing ring.
Preferably, lock position there are four the pushing mechanism tools, and the corresponding pushing mechanism in four lock positions
The relationship of extension elongation are as follows:
L1< L2< L3< L4；
Wherein, L1For the extension elongation of the corresponding pushing mechanism in the first lock position；L2It is pushed away for the second lock position is corresponding
The extension elongation of motivation structure；L3For the extension elongation of the corresponding pushing mechanism in third lock position；L4It is corresponding for the 4th lock position
Pushing mechanism extension elongation.
A kind of control method of engine valve timing and lift while variset, pushes away according to the control of the revolving speed of engine
The length that motivation structure stretches out, changes the start-up time and inlet valve lift of inlet valve.
Preferably, the engine valve timing and lift while the control method of variset, comprising:
As n < 1000r/m, the pushing mechanism is controlled in the first lock position locking；
As 1000≤n < 3500r/m, the pushing mechanism is controlled in the second lock position locking；
As 3500≤n < 6000r/m, the pushing mechanism is controlled in third lock position locking；
As n >=6000r/m, control lock states pushing mechanism in the 4th lock position locking；
Wherein, n is engine speed；When the pushing mechanism is in the 4th lock position locking, the IO Intake Valve Opens time
Earliest, and inlet valve lift is maximum.
The beneficial effects of the present invention are:
(1) engine valve timing provided by the invention and lift while variset, Integrated design is in motor body
It is compact-sized in lid, and high pressure oil can be by adding oil circuit for high pressure from its cylinder cap main oil gallery in motor body lid
Oil introduces its control reversal valve added, and oil circuit is connected by switching reversal valve to change the positioning of the promotion cylinder of hydraulic cylinder and stretch out
It is low to engine body improvement cost, easy to control reliable with shortening.
(2) engine variable-valve timing lift device of the present invention can work four positions, compared to more existing
There is the case where most of variable valve timing and lift technology can only operate in two positions, the present invention has subtleer and smart
Thin timing and lift are adjusted, and preferably adapt to the high tick-over operating condition of engine, improve the thermal efficiency, improve fuel economy.
(3) engine valve timing provided by the invention and lift while the control method of variset, can supervise in real time
Engine speed is controlled, changes pin shaft position as rotation speed change is passed through high pressure oil and then changes IO Intake Valve Opens time and valve
Lift.
(4) engine valve timing provided by the invention and lift while the control method of variset, in preadmission
Increase inlet valve lift simultaneously in the case where door start-up time, and changing rule meets engine operating condition requirement, Neng Gouti
High volumetric efficiency, makes fuel oil be fully burned, and meets engine power performance requirement.
Detailed description of the invention
Fig. 1 is engine valve timing of the present invention and lift variset general structure schematic diagram simultaneously.
Fig. 2 is the structural schematic diagram of rocker arm of the present invention and hydraulic tappet junction.
Fig. 3 is pushing mechanism structural schematic diagram of the present invention.
Fig. 4 is the schematic diagram that pushing mechanism of the present invention is in the first lock position.
Fig. 5 is the schematic diagram that pushing mechanism of the present invention is in the second lock position.
Fig. 6 is the schematic diagram that pushing mechanism of the present invention is in third lock position.
Fig. 7 is the schematic diagram that pushing mechanism of the present invention is in the 4th lock position
Fig. 8 is the schematic diagram of the control method of engine valve timing of the present invention and lift while variset.
Fig. 9 is the valve timing of double inlet valves of the present invention and the schematic diagram of lift while variset.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
As shown in Figure 1, being specifically included that the present invention provides a kind of engine valve timing and lift while variset
Motor body 100, inlet valve 110, return spring 120, pushing mechanism 130, hydraulic tappet 140, rocker arm 150, pin shaft 160 with
And cam 170.
Inlet valve 110 is vertically arranged, and inlet valve 110 includes head portion that 111 and valve stem 112, wherein the valve stem
112 movably pass through motor body 100, and extend into motor body 100.Return spring 120 is set in valve
On bar 112；The circumferential direction of the upper end edge valve stem 112 of valve stem 112 is provided with limit baffle 112a.The upper end of return spring 120
It is resisted against on limit baffle 112a, lower end is resisted against on the inner wall of motor body 100.
Pushing mechanism 130 is fixedly mounted on the left side inside motor body 100, and pushing mechanism 130 is horizontally disposed,
I.e. 130 installation direction of pushing mechanism and the valve stem 112 is axially vertical.Moveable one end of pushing mechanism 130 is integrated
Have and push ring 131, pushes in ring 131 and be provided with first sliding groove 131a.Wherein, first sliding groove 131a is waist type groove, and first
The axial direction of sliding slot 131a is vertical direction.
Hydraulic tappet 140 is fixedly mounted on the right side inside motor body 100.The right end and hydraulic tappet of rocker arm 150
140 is hinged, and the upper end of valve stem 120 is resisted against on the downside of the left end of rocker arm 150；And second sliding slot 151 is provided in rocker arm.
Wherein, first sliding groove 131a and second sliding slot 151 are arranged in a crossed manner, the axis of first sliding groove 131a and the axis of second sliding slot 151
Between have angle.
The matching of pin shaft 160 is arranged in first sliding groove 131a and second sliding slot 151；The upside of pin shaft 160 is provided with cam
170, by the crankshaft of engine by belt or chain drive, cam 170 contacts cam 170 with pin shaft 160.Wherein, pin shaft 160
It can be moved back and forth under the extruding of cam 170 along first sliding groove 131a, and pin shaft 160 can be in the promotion for pushing ring 131
It is lower to be moved back and forth along second sliding slot 151.
In the present embodiment, second sliding slot 151 be arc, cam 170 be arranged in second sliding slot 151 concave side (on
Side), the convex side (downside) of second sliding slot 151 is arranged in inlet valve 110.In pin shaft in the second sliding slot 151 of rocker arm 150
160 two sides are respectively arranged with the first buffer spring 153 and the second buffer spring 154.Wherein, a left side for the first buffer spring 153
End is connected to the right side of pin shaft 160, and right end is connected to the right end of second sliding slot 151；The left end connection the of second buffer spring 154
The left end of two sliding slots 151, right end are connected to the left side of pin shaft 160.
As shown in Fig. 2, the connection type of rocker arm 150 and hydraulic tappet are as follows: it is hinged that the right end of rocker arm is fixedly connected with first
Portion 152, the first articulated section 152 are sphere；The second articulated section 141 is provided on hydraulic tappet 140, inside the second articulated section 141
With spherical cavity；Wherein, the first articulated section 152 matching is arranged in the second junction 141, and can be in the second articulated section
It is freely rotated in 141.
As shown in fig. 3 to 7, pushing mechanism 130 uses double acting hydraulic cylinder, by stationary cylinder 130a, piston 130b and pushes cylinder
130c composition, wherein push to be integrated with pushing ring 131 on the right side of cylinder 130c.Inside stationary cylinder 130a and promotion cylinder 130c respectively
Length with hydraulic cavities, and the hydraulic cavities of stationary cylinder 130a is greater than and pushes the length of the hydraulic cavities of cylinder 130c.Piston
The left and right ends of bar 130b are located in the hydraulic cavities in the hydraulic cavities of stationary cylinder 130a and pushing cylinder 130c, and in fixation
The hydraulic cavities left and right ends of cylinder 130a are respectively arranged with logical hydraulic fluid port A and logical hydraulic fluid port B；In the left and right two for the hydraulic cavities for pushing cylinder 130c
End is respectively arranged with logical hydraulic fluid port C and logical hydraulic fluid port D.High pressure oil will by adding oil circuit from its cylinder cap main oil gallery in engine cylinder cover
High pressure oil introduces its control reversal valve added, and oil circuit is connected by switching reversal valve to change the positioning of the promotion cylinder of hydraulic cylinder
It stretches out and shortens.The tool of pushing mechanism 130 is there are four lock position, and the corresponding pushing mechanism extension elongation in four lock positions
Relationship are as follows:
L1< L2< L3< L4；
Wherein, L1For the extension elongation of the corresponding pushing mechanism in the first lock position；L2It is pushed away for the second lock position is corresponding
The extension elongation of motivation structure；L3For the extension elongation of the corresponding pushing mechanism in third lock position；L4It is corresponding for the 4th lock position
Pushing mechanism extension elongation.
As shown in figure 4, the left end of piston rod 130b is resisted against stationary cylinder when pushing mechanism 130 is in the first lock position
The left end of the hydraulic cavities of 130a；And the right end of piston rod 130b is resisted against the right end for pushing the hydraulic cavities of cylinder 130c, lives at this time
The length that stopper rod stretches out is L1。
As shown in figure 5, the left end of piston rod 130b is resisted against stationary cylinder when pushing mechanism 130 is in the second lock position
The left end of the hydraulic cavities of 130a；And the right end of piston rod 130b is resisted against the left end for pushing the hydraulic cavities of cylinder 130c, lives at this time
The length that stopper rod stretches out is L2。
As shown in fig. 6, the left end of piston rod 130b is resisted against stationary cylinder when pushing mechanism 130 is in third lock position
The right end of the hydraulic cavities of 130a；And the right end of piston rod 130b is resisted against the right end for pushing the hydraulic cavities of cylinder 130c, lives at this time
The length that stopper rod stretches out is L3。
As shown in fig. 7, the left end of piston rod 130b is resisted against stationary cylinder when pushing mechanism 130 is in four lock positions
The right end of the hydraulic cavities of 130a；And the right end of piston rod 130b is resisted against the left end for pushing the hydraulic cavities of cylinder 130c, lives at this time
The length that stopper rod stretches out is L4。
In the present embodiment, cam 170 is rotated in a clockwise direction, and cam 170 squeezes the pin shaft by rotating
160.It moves up and down pin shaft 160 in promotion ring 131 and the rocker arm 150 is driven to rotate around hydraulic tappet 140.Due to air inlet
Door 110 is pressed on motor body 100 by return spring 120, and when rocker arm 150 pushes, return spring 120 is compressed,
After intake process, rocker arm 150 rises, and the elongation of return spring 120 drives inlet valve 110 is mobile to close inlet valve 110.
Meanwhile the extension elongation by controlling pushing mechanism 130, change the position in the horizontal direction of pin shaft 160, to change pin
The time that axis 160 is contacted with the small head end (with cam axle center apart from farther away one end) of cam 170, i.e. change engine valve are opened
The time opened；The distance that the pushing of rocker arm 150 can be changed simultaneously, can change valve stroke.
As shown in figure 8, the present invention also provides a kind of engine valve timing and lift while the control method of variset,
Engine speed threshold value involved in the control method will be tested according to different engine model, discharge capacity and maximum speed etc.
Calibration obtains, and calibration process is to be obtained with the preferably indexs such as intake efficiency and maximum power by rack on-line proving.As
The prior art, herein not reinflated explanation.The control method includes:
Operating condition one, engine speed n1, lead to hydraulic fluid port B and logical hydraulic fluid port C and inject high pressure oil simultaneously, lead to hydraulic fluid port A and logical hydraulic fluid port D
Low pressure oil return opening is connect, makes pushing mechanism 130 in the first lock position locking (as shown in Figure 4), 130 elongated distance of pushing mechanism is most
Short, pin shaft 160 is in the extreme lower position (farthest from hydraulic tappet 140) in second sliding slot 151, under the action of cam 170, pin
Axis 160 drives rocker arm 150 to move back and forth up and down, to drive inlet valve 110 to open and close, due to pin shaft 160 and cam 170
Relative position, make 110 opening time of inlet valve the latest and valve stroke be minimum.
Operating condition two, engine speed n2, lead to hydraulic fluid port B and logical hydraulic fluid port D and inject high pressure oil simultaneously, lead to hydraulic fluid port A and logical hydraulic fluid port C
Connect low pressure oil return opening, make to control pushing mechanism 130 in the second lock position locking (as shown in Figure 5), hydraulic cylinder outreach compared with
Short, pin shaft 160 is in 151 lower position of second sliding slot, and under the action of cam 170, pin shaft 160 drives and moves down on rocker arm 150
It is dynamic, so that inlet valve 110 be driven to open and close, due to the relative position of pin shaft 160 and cam 170, open inlet valve 110
Time has to be shifted to an earlier date and valve stroke increases compared with operating condition one.
Operating condition three, engine speed n3, lead to hydraulic fluid port A and logical hydraulic fluid port C and inject high pressure oil simultaneously, lead to hydraulic fluid port B and logical hydraulic fluid port D
Connect low pressure oil return opening；Make to control pushing mechanism 130 in third lock position locking (as shown in Figure 6), it is sliding that pin shaft 160 is in second
151 higher position of slot, at this time under the action of cam 170, pin shaft 160 drives rocker arm 150 to move up and down, to drive inlet valve
110 open and close, and due to the relative position of pin shaft 160 and cam 170,110 opening time of inlet valve is mentioned compared with operating condition two
Preceding and valve stroke increases.
Operating condition four, engine speed n4, lead to hydraulic fluid port A and logical hydraulic fluid port D and inject high pressure oil simultaneously, lead to hydraulic fluid port B and logical hydraulic fluid port C
Low pressure oil return opening is connect, makes to control pushing mechanism 130 in the 4th lock position locking (as shown in Figure 7), hydraulic cylinder outreach is most
Long, pin shaft 160 is in 151 extreme higher position of second sliding slot (near hydraulic tappet 140), at this time under the action of cam 170, pin
Axis 160 drives rocker arm 150 to move up and down, and drives inlet valve 110 to open and close therewith, the opposite position of pin shaft 160 and cam 170
It sets, makes that 110 opening time of inlet valve is earliest and valve stroke is maximum.
Wherein, the relationship of operating condition one, operating condition two, operating condition three and the corresponding engine speed of operating condition four are as follows:
n1< n2< n3< n4。
In the present embodiment, the specific control method of the engine valve timing and lift variset simultaneously includes:
Firstly, obtaining the real-time revolving speed n of engine by speed probe；
As n < 1000r/m, injection high pressure oil connects low pressure and returns in logical hydraulic fluid port B and logical hydraulic fluid port C, logical hydraulic fluid port A and logical hydraulic fluid port D
Hydraulic fluid port；
As 1000≤n < 3500r/m, injection high pressure oil connects in logical hydraulic fluid port B and logical hydraulic fluid port D, logical hydraulic fluid port A and logical hydraulic fluid port C
Low pressure oil return opening；
As 3500≤n < 6000r/m, injection high pressure oil connects in logical hydraulic fluid port A and logical hydraulic fluid port C, logical hydraulic fluid port B and logical hydraulic fluid port D
Low pressure oil return opening；
As n >=6000r/m, injection high pressure oil connects low pressure and returns in logical hydraulic fluid port A and logical hydraulic fluid port D, logical hydraulic fluid port B and logical hydraulic fluid port C
Hydraulic fluid port.
As shown in figure 9, in another embodiment, using double inlet valve mechanisms.Including two inlet valves 110,210；Phase
It is corresponding to set there are two return spring 120,220；Two hydraulic tappets 140,240；Two rocker arms 150,250；It is corresponding to shake
It is provided with buffer spring 153 and 154 in arm 150, buffer spring 252 and 253 is provided in rocker arm 250；Wherein, inlet valve with shake
Arm is one-to-one relationship, and specific mounting means is identical as the structure of an inlet valve.Two rocker arms and a set of pushing mechanism
130, a pin shaft 160 and a cam 170 cooperate；Wherein, pushing mechanism 130 is arranged between two rocker arms 150 and 250,
One end of pushing mechanism 130 is integrated there are two pushing ring 131 and 231, pin shaft 160 match simultaneously be arranged two promotion rings 131,
231 and rocker arm 150,250 in sliding slot in.Cam 170 is arranged between two promotion rings 131 and 231, and connects with pin shaft 160
Touching, for squeezing pin shaft 160.
Likewise, pushing mechanism 130 using double acting hydraulic cylinder, can provide four kinds of different lock positions and can be corresponding
Position carries out locking.
The control method of double inlet valve mechanisms is identical as the control method of single inlet valve mechanism, i.e., according to engine speed reality
When change pin shaft 160 position, with the raising of revolving speed, IO Intake Valve Opens time and lift can all be improved, improve engine fill
Gas efficiency meets the requirement to dynamic property.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of engine valve timing and lift while variset characterized by comprising
Inlet valve comprising the head portion that and valve stem being fixedly connected；
Wherein, the valve stem movably passes through motor body, and extend into the engine shell body；
Return spring is set on the valve stem；
Wherein, the end of the valve stem is provided with limit baffle along the circumferential direction of the valve stem；One end of the return spring
It is resisted against the limiting block on piece, the other end is resisted against on the motor body；
Pushing mechanism is fixedly mounted in the engine shell body, and the installation direction of the pushing mechanism and the gas
Door rod is vertical；
Ring is pushed, is fixedly connected with moveable one end of the pushing mechanism, is provided with first sliding groove in the promotion ring；
Hydraulic tappet is fixedly mounted in the engine shell body；
Rocker arm, one end and the hydraulic tappet are hinged, and the side of the other end is resisted against the end of the valve stem；And it is described
Second sliding slot is provided in rocker arm；
Wherein, there is angle between the axis of the first sliding groove and the axis of the second sliding slot；
Cam is driven by engine crankshaft；
Wherein, the inlet valve and the cam are located at the two sides of the second sliding slot；
Pin shaft, matching setting lean in the first sliding groove and the second sliding slot, and with the cam；
Wherein, the pin shaft can the first sliding groove described in the extruding lower edge of the cam move back and forth, and the pin shaft energy
Enough second sliding slots described in the promotion lower edge for pushing ring move back and forth.
2. engine valve timing according to claim 1 and lift while variset, which is characterized in that described second
Sliding slot is arc, and the concave side of the second sliding slot is arranged in the cam, and the second sliding slot is arranged in the inlet valve
Convex side.
3. engine valve timing according to claim 2 and lift while variset, which is characterized in that further include；
First buffer spring, one end are fixedly connected on the pin shaft, and the other end is fixedly connected on the one of the second sliding slot
End；And
Second buffer spring, one end are fixedly connected on the pin shaft, and the other end is fixedly connected on the another of the second sliding slot
One end.
4. engine valve timing according to claim 2 or 3 and lift while variset, which is characterized in that described
Pushing mechanism and the hydraulic tappet are installed respectively close to the both ends of the second sliding slot.
5. engine valve timing according to claim 4 and lift while variset, which is characterized in that the promotion
Mechanism tool is there are four lock position, and the relationship of the corresponding pushing mechanism extension elongation in four lock positions are as follows:
L1< L2< L3< L4；
Wherein, L1For the extension elongation of the corresponding pushing mechanism in the first lock position；L2For the corresponding promotion machine in the second lock position
The extension elongation of structure；L3For the extension elongation of the corresponding pushing mechanism in third lock position；L4It is pushed away for the 4th lock position is corresponding
The extension elongation of motivation structure.
6. engine valve timing according to claim 5 and lift while variset, which is characterized in that the rocker arm
One end be fixedly connected with the first articulated section, the second articulated section is provided on the hydraulic tappet；
Wherein, first articulated section is sphere, has spherical cavity inside second articulated section；First articulated section energy
It is enough to be freely rotated in second articulated section.
7. a kind of engine valve timing and lift while variset characterized by comprising
Two inlet valves, the inlet valve include the head portion that being fixedly connected and valve stem；
Wherein, the valve stem movably passes through motor body, and extend into the engine shell body；
Two return springs are respectively sleeved on two valve stems；
Wherein, the end of the valve stem is provided with limit baffle along the circumferential direction of the valve stem；One end of the return spring
It is resisted against the limiting block on piece, the other end is resisted against on the motor body；
Pushing mechanism is fixedly mounted in the engine shell body, and the installation direction of the pushing mechanism and the gas
Door rod is vertical；
Two promotion rings, are fixedly connected with moveable one end of the pushing mechanism, are provided with first in the promotion ring
Sliding slot；
Two hydraulic tappets are fixedly mounted in the engine shell body；
Two rocker arms are symmetricly set on the two sides of the pushing mechanism, and respectively close to two promotion rings；Two institutes
The one end for stating rocker arm is hinged with two hydraulic tappets respectively, and the side of the other end is born against in two valve stems
End；And second sliding slot is provided in the rocker arm；
Wherein, there is angle between the axis of the first sliding groove and the axis of the second sliding slot；
Cam is driven by engine crankshaft；
Wherein, the inlet valve and the cam are located at the two sides of the second sliding slot；
Pin shaft, matching setting lean in the first sliding groove and the second sliding slot, and with the cam；
Wherein, the pin shaft can the first sliding groove described in the extruding lower edge of the cam move back and forth, and the pin shaft energy
Enough second sliding slots described in the promotion lower edge for pushing ring move back and forth.
8. engine valve timing according to claim 7 and lift while variset, which is characterized in that the promotion
Mechanism tool is there are four lock position, and the relationship of the corresponding pushing mechanism extension elongation in four lock positions are as follows:
L1< L2< L3< L4；
Wherein, L1For the extension elongation of the corresponding pushing mechanism in the first lock position；L2For the corresponding promotion machine in the second lock position
The extension elongation of structure；L3For the extension elongation of the corresponding pushing mechanism in third lock position；L4It is pushed away for the 4th lock position is corresponding
The extension elongation of motivation structure.
9. the control method of a kind of engine valve timing and lift while variset, which is characterized in that according to engine
Revolving speed controls the length that pushing mechanism stretches out, and changes the start-up time and inlet valve lift of inlet valve.
10. the control method of engine valve timing according to claim 9 and lift while variset, feature exist
In, comprising:
As n < 1000r/m, the pushing mechanism is controlled in the first lock position locking；
As 1000≤n < 3500r/m, the pushing mechanism is controlled in the second lock position locking；
As 3500≤n < 6000r/m, the pushing mechanism is controlled in third lock position locking；
As n >=6000r/m, control lock states pushing mechanism in the 4th lock position locking；
Wherein, n is engine speed；When the pushing mechanism is in the 4th lock position locking, the IO Intake Valve Opens time is earliest,
And inlet valve lift is maximum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910561262.8A CN110159385B (en) | 2019-06-26 | 2019-06-26 | Engine valve timing and lift simultaneous variable device and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910561262.8A CN110159385B (en) | 2019-06-26 | 2019-06-26 | Engine valve timing and lift simultaneous variable device and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110159385A true CN110159385A (en) | 2019-08-23 |
| CN110159385B CN110159385B (en) | 2023-07-18 |
Family
ID=67626990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910561262.8A Active CN110159385B (en) | 2019-06-26 | 2019-06-26 | Engine valve timing and lift simultaneous variable device and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110159385B (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6316111A (en) * | 1986-07-04 | 1988-01-23 | Honda Motor Co Ltd | Tappet mechanism for internal combustion engine |
| US4723516A (en) * | 1985-11-25 | 1988-02-09 | Slagley Michael W | Valve open duration and timing controller |
| DE19629881A1 (en) * | 1996-07-24 | 1998-01-29 | Bayerische Motoren Werke Ag | Valve train of an internal combustion engine with rocker arms supported on an eccentric shaft |
| CN1900491A (en) * | 2006-07-20 | 2007-01-24 | 姬腾飞 | Timing and lift continuous changeable device for engine air valve |
| CN101429882A (en) * | 2008-12-12 | 2009-05-13 | 奇瑞汽车股份有限公司 | Continuous variable air valve lift apparatus |
| CN101968000A (en) * | 2010-09-27 | 2011-02-09 | 奇瑞汽车股份有限公司 | Continuous variable valve lift device and gas distribution mechanism with device |
| US20120325167A1 (en) * | 2010-03-11 | 2012-12-27 | Eiichi Kamiyama | Valve drive system of internal combustion engine |
| CN202645664U (en) * | 2012-06-21 | 2013-01-02 | 刘若丹 | Valve mechanism of same independent control variable valve timing and variable valve lift |
| CN103437850A (en) * | 2013-08-14 | 2013-12-11 | 重庆长安汽车股份有限公司 | Continuously variable valve lift mechanism |
| CN103939171A (en) * | 2013-01-21 | 2014-07-23 | 重庆长安汽车股份有限公司 | Variable valve lift mechanism of engine |
| CN204591392U (en) * | 2015-05-18 | 2015-08-26 | 上海汽车集团股份有限公司 | Variable air valve lift apparatus, motor and automobile |
| US20170159515A1 (en) * | 2014-06-26 | 2017-06-08 | Yamaha Hatsudoki Kabushiki Kaisha | Valve gear for engine |
| CN108757085A (en) * | 2018-08-10 | 2018-11-06 | 芜湖钻石航空发动机有限公司 | A kind of lift range variable structure and its control method |
| CN109736915A (en) * | 2019-02-28 | 2019-05-10 | 天津大学 | A kind of diesel engine inlet valve multi-mode time-delay closing system and working method |
| CN210033555U (en) * | 2019-06-26 | 2020-02-07 | 吉林大学 | Device capable of simultaneously changing timing and lift of engine valve |
-
2019
- 2019-06-26 CN CN201910561262.8A patent/CN110159385B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4723516A (en) * | 1985-11-25 | 1988-02-09 | Slagley Michael W | Valve open duration and timing controller |
| JPS6316111A (en) * | 1986-07-04 | 1988-01-23 | Honda Motor Co Ltd | Tappet mechanism for internal combustion engine |
| DE19629881A1 (en) * | 1996-07-24 | 1998-01-29 | Bayerische Motoren Werke Ag | Valve train of an internal combustion engine with rocker arms supported on an eccentric shaft |
| CN1900491A (en) * | 2006-07-20 | 2007-01-24 | 姬腾飞 | Timing and lift continuous changeable device for engine air valve |
| CN101429882A (en) * | 2008-12-12 | 2009-05-13 | 奇瑞汽车股份有限公司 | Continuous variable air valve lift apparatus |
| US20120325167A1 (en) * | 2010-03-11 | 2012-12-27 | Eiichi Kamiyama | Valve drive system of internal combustion engine |
| CN101968000A (en) * | 2010-09-27 | 2011-02-09 | 奇瑞汽车股份有限公司 | Continuous variable valve lift device and gas distribution mechanism with device |
| CN202645664U (en) * | 2012-06-21 | 2013-01-02 | 刘若丹 | Valve mechanism of same independent control variable valve timing and variable valve lift |
| CN103939171A (en) * | 2013-01-21 | 2014-07-23 | 重庆长安汽车股份有限公司 | Variable valve lift mechanism of engine |
| CN103437850A (en) * | 2013-08-14 | 2013-12-11 | 重庆长安汽车股份有限公司 | Continuously variable valve lift mechanism |
| US20170159515A1 (en) * | 2014-06-26 | 2017-06-08 | Yamaha Hatsudoki Kabushiki Kaisha | Valve gear for engine |
| CN204591392U (en) * | 2015-05-18 | 2015-08-26 | 上海汽车集团股份有限公司 | Variable air valve lift apparatus, motor and automobile |
| CN108757085A (en) * | 2018-08-10 | 2018-11-06 | 芜湖钻石航空发动机有限公司 | A kind of lift range variable structure and its control method |
| CN109736915A (en) * | 2019-02-28 | 2019-05-10 | 天津大学 | A kind of diesel engine inlet valve multi-mode time-delay closing system and working method |
| CN210033555U (en) * | 2019-06-26 | 2020-02-07 | 吉林大学 | Device capable of simultaneously changing timing and lift of engine valve |
Non-Patent Citations (2)
| Title |
|---|
| 王军年: "电动轮独立驱动汽车差动助力转向技术研究", 吉林大学 * |
| 裕莉莉: "某商用车发动机气门桥失效分析", 汽车工艺与材料 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110159385B (en) | 2023-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107676176B (en) | A kind of slide valve air gate type opposed pistons gasoline engine | |
| CN106246362B (en) | A kind of double dynamical output variable compression ratio engine of machine-liquid | |
| CN110778394A (en) | Energy-saving four-stroke internal combustion engine | |
| CN210033555U (en) | Device capable of simultaneously changing timing and lift of engine valve | |
| US4911115A (en) | Slide exhaust control valve for fuel injected two-stroke cycle engines and process for using same | |
| WO2016004860A1 (en) | Two-stroke gear shaft engine for power device | |
| CN101713308B (en) | Hydraulic valve mechanism of variable valve lift | |
| CN109882287A (en) | Rotating disc type internal combustion engine | |
| CN201159093Y (en) | Variable air valve mechanism of hydraulic internal combustion engine | |
| CN110159385A (en) | A kind of engine valve timing and lift variset and its control method simultaneously | |
| CN103967639A (en) | Premixed Compression Self-ignition Engine | |
| CN108868943A (en) | Using two or the four stroke switching method of engine of the full changeable air valve of electromagnetism | |
| CN110030106A (en) | Quartastroke engine intake and exhaust air interchanger | |
| Diana et al. | The effect of valve lift shape and timing on air motion and mixture formation of DISI engines adopting different VVA actuators | |
| CN2911205Y (en) | Rotary piston I.C. engine | |
| CN112112733A (en) | Valve driving structure of engine and using method thereof | |
| CN202707223U (en) | Two-stroke diesel engine | |
| US4491098A (en) | Device for altering cam profile | |
| CN201228571Y (en) | Rotary ball valve acutating mechanism of four-stroke cycle engine | |
| CN103233789A (en) | Multi-mode two-stroke atkinson cycle internal-combustion engine with fully overhead valve | |
| JP2014234707A (en) | Internal combustion engine | |
| CN114810342B (en) | Constant volume heating circulation structure of internal combustion engine | |
| CN209398498U (en) | A kind of rotary piston engine | |
| CN213392389U (en) | Novel two-stroke engine | |
| CN208380694U (en) | A kind of olive heart rotary engine |
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 |