CN106401688A - Valve timing mechanism for engine and cam of valve timing mechanism - Google Patents

Valve timing mechanism for engine and cam of valve timing mechanism Download PDF

Info

Publication number
CN106401688A
CN106401688A CN201510461160.0A CN201510461160A CN106401688A CN 106401688 A CN106401688 A CN 106401688A CN 201510461160 A CN201510461160 A CN 201510461160A CN 106401688 A CN106401688 A CN 106401688A
Authority
CN
China
Prior art keywords
cam
molded line
section
valve
roller
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.)
Pending
Application number
CN201510461160.0A
Other languages
Chinese (zh)
Inventor
程超
吴超
李红政
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Great Wall Motor Co Ltd
Original Assignee
Great Wall Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Great Wall Motor Co Ltd filed Critical Great Wall Motor Co Ltd
Priority to CN201510461160.0A priority Critical patent/CN106401688A/en
Publication of CN106401688A publication Critical patent/CN106401688A/en
Pending legal-status Critical Current

Links

Abstract

The invention discloses a valve timing mechanism for an engine and a cam of the valve timing mechanism. The valve timing mechanism for the engine comprises a valve mechanism, a swing arm assembly, a first roller, a second roller, a first cam shaft and a second cam shaft; a first cam profile and a second cam profile each comprise a corresponding profile first section, a corresponding profile second section, a corresponding profile third section, a corresponding profile fourth section, a corresponding profile fifth section, a corresponding profile sixth section and a corresponding profile seventh section which are connected end to end; when the first roller abuts against the first profile first section, the first profile second section, the first profile third section and the first profile fourth section and the second roller abuts against the second profile first section, the second profile second section, the second profile third section and the second profile fourth section, a valve is in the first closing state, the opening stage, the closing stage and the second closing state in sequence; and a phase position adjusting mechanism used for adjusting opposite phases of the first cam shaft and the second cam shaft is further included. According to the valve timing mechanism for the engine in the embodiment, the variable valve lift can be achieved.

Description

Valve actuating mechanism for electromotor and its cam
Technical field
The present invention relates to automobile construction field, especially relate to a kind of valve actuating mechanism for electromotor and its cam.
Background technology
The valve actuating mechanism of electromotor is used for driving the opening and closing of valve, and in order to lift the combination property of electromotor, the discharge fuel economy regulation meeting increasingly stringent requires, valve actuating mechanism Trend is become using variable valve actuator for air, variable valve actuator for air can be divided into the no variable valve actuator for air of camshaft and the variable valve actuator for air based on camshaft, but correlation technique In, based on the variable valve actuator for air of camshaft, complex structure, single function, such as air valve variation lift or change duration, and parts are many, control loaded down with trivial details.
Content of the invention
In view of this, it is contemplated that proposing a kind of valve actuating mechanism for electromotor, this air distribution structure is simple, and parts are few, can achieve variable valve lift.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that：
A kind of valve actuating mechanism for electromotor includes：Valve mechanism；Swing arm unit, the substructure of described swing arm unit has driving face, and described driving face is suitable to drive The valve moving described valve mechanism moves along the direction parallel to valve centrage；First roller and the second roller, described first roller and described second roller are all pivotly It is located on described swing arm unit；First camshaft and the second camshaft, described first camshaft has the first cam, and described second camshaft has the second cam, and described One cam and described second cam constant speed adverse movement, described first cam has the first cam profile, described first cam profile include circumference along described first cam according to The 4th section of secondary end to end first molded line first paragraph to the first molded line, described second cam has the second cam profile, and described second cam profile includes convex along described second The circumference of wheel the 4th section of end to end second molded line first paragraph to the second molded line successively, described first roller against described first molded line first paragraph and described second roller against During described second molded line first paragraph, described valve is in the first closed mode, and against the first molded line second segment and described second roller is against the second molded line for described first roller During two-stage nitration, described valve is in open stage, described first roller against the 3rd section of the first molded line and described second roller against the 3rd section of the second molded line when, at described valve In dwell period, described first roller against the 4th section of the first molded line and described second roller against the 4th section of the second molded line when, described valve is in the second closed mode；With In the phase-regulating mechanism adjusting described first camshaft and described second camshaft relative phase.
Further, described first molded line first paragraph and described first molded line second segment are located on the first basic circle with the central axis of described first camshaft as the center of circle, described The junction point of the 3rd section of the first molded line and the 4th section of described first molded line is located on the second basic circle with the central axis of described first camshaft as the center of circle, described first basic circle Radius is more than the radius of described second basic circle, and the 3rd section of described first molded line arrives the distance of the central axis of described first camshaft from being connected with described first molded line second segment One end is gradually reduced to described junction point, and the 4th section of described first molded line arrive the distance of the central axis of described first camshaft from described junction point to described first molded line One end that first paragraph is connected is gradually increased.
Further, on the 3rd section of the 3rd basic circle being located at the central axis of described second camshaft as the center of circle of described second molded line, described 3rd basic circle and described first base The radius of circle is identical, and described second molded line first paragraph is located on the 4th basic circle with the central axis of described second camshaft as the center of circle, described 4th basic circle and described second base The radius of circle is identical, and the distance of the central axis to described second camshaft for the described second molded line second segment is from the one end being connected with described second molded line first paragraph to described the The 3rd section of connected other end of two molded line is gradually increased, and the 4th section of described second molded line arrive the distance of the central axis of described second camshaft from described second molded line the 3rd One end of Duan Xianglian is gradually reduced to the other end being connected with described second molded line first paragraph.
Further, when described valve is in described first closed mode, described open stage, described dwell period, described second closed mode successively, described first is convex Wheel and described second cam all turn over 165 °, 60 °, 60 °, 75 ° successively.
Further, described swing arm unit includes：First swing arm；Second swing arm, described second swing arm is pivotably coupled to the bottom of described first swing arm, and described second Swing arm is rotatable around rotation axiss, and the substructure of described second swing arm has described driving face.
Further, described first swing arm includes：First intermediate link arm portion and two the first swing arm portions, described two first swing arm portions are respectively provided at and connect in the middle of described first Connect the two ends of arm, described two first swing arm portions are oppositely arranged and axially spaced from each other along described first camshaft and described second camshaft, described first roller leads to Cross the first sub- bearing pin to be pivotally arranged between described two first swing arm portions, described second roller by the second sub- bearing pin be pivotally arranged in described two first swing arm portions it Between, described first intermediate link arm portion is pivotly connected with described second swing arm by the second bearing pin, the central axis of described first sub- bearing pin, described second sub- bearing pin The central axis of central axis and described second bearing pin is located on three seamed edges of a triangular prism.
Further, described second swing arm is suitable to be rotatably arranged on the cylinder cap of described electromotor by the 3rd bearing pin, the central axis of described 3rd bearing pin and described rotation Dead in line, described 3rd bearing pin is located between described second bearing pin and described driving face.
Further, described driving face includes the first segmental arc, the second segmental arc and the 3rd segmental arc, described second segmental arc be connected to described first segmental arc with described Between 3rd segmental arc, and described second segmental arc is tangent with described first segmental arc and described 3rd segmental arc respectively；Described second segmental arc and described rotation axiss away from Increase to the second end being connected with described 3rd segmental arc from from the first end being connected with described first segmental arc；The distance of described 3rd segmental arc and described rotation axiss from The first end that described second segmental arc is connected increases to the second end away from described second segmental arc.
With respect to prior art, the valve actuating mechanism for electromotor of the present invention has the advantage that：
Structure is simple, it is possible to achieve variable valve lift.Its swing arm unit of valve actuating mechanism simultaneously according to embodiments of the present invention is simpler, compact, and parts are few, cost Low, and be easily controlled.
Another object of the present invention is to also proposing a kind of cam, the molded line of described cam include along described cam circumference successively end to end cornerite be 165 ° first Molded line first paragraph, cornerite be 60 ° the first molded line second segment, cornerite be 60 ° of the 3rd section of the first molded line and the 4th section of the first molded line that cornerite is 75 °, described first Molded line first paragraph and described first molded line second segment are located on the first basic circle with the rotation axiss of described cam as the center of circle, the 3rd section of described first molded line and described first molded line 4th section of junction point is located on the second basic circle with the rotation axiss of described cam as the center of circle, and the radius of described first basic circle is more than the radius of described second basic circle, and described the The 3rd section of distance to the rotation axiss of described cam of one molded line is gradually reduced to described junction point from the one end being connected with described first molded line second segment, and described first molded line The 4th section of junction point described in distance to the rotation axiss of described cam is gradually increased to the one end being connected with described first molded line first paragraph.
Another object of the present invention is also to propose a kind of cam, the molded line of described cam include along described cam circumference successively end to end cornerite be 165 ° second Molded line first paragraph, cornerite be 60 ° the second molded line second segment, cornerite be 60 ° of the 3rd section of the second molded line and the 4th section of the second molded line that cornerite is 75 °, described second The 3rd section of molded line is located on the 3rd basic circle with the rotation axiss of described cam as the center of circle, and described 3rd basic circle is identical with the radius of described first basic circle, described second molded line the On one section of the 4th basic circle being located at the rotation axiss of described cam as the center of circle, described 4th basic circle is identical with the radius of described second basic circle, and described second molded line second segment arrives The distance of the rotation axiss of described cam is gradually increased to described the 3rd section of other end being connected of second molded line from the one end being connected with described second molded line first paragraph, and described The 4th section of second molded line arrive the distance of the rotation axiss of described cam from described the 3rd section of one end being connected of second molded line to another with what described second molded line first paragraph was connected End is gradually reduced.
Brief description
The accompanying drawing constituting the part of the present invention is used for providing a further understanding of the present invention, and the schematic description and description of the present invention is used for explaining the present invention, not Constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the general structure schematic diagram of the valve actuating mechanism for electromotor described in the embodiment of the present invention；
Fig. 2 is the partial structural diagram of the valve actuating mechanism for electromotor described in the embodiment of the present invention
Fig. 3 is partial structural diagram, not shown cylinder cap and the support of the valve actuating mechanism for electromotor described in the embodiment of the present invention；
Fig. 4 is the attachment structure schematic diagram with the first roller and the second roller for first swing arm of the embodiment of the present invention；
Fig. 5 is the sectional view of Fig. 4；
Fig. 6 is the structural representation of the first swing arm of the embodiment of the present invention；
Fig. 7 is the attachment structure schematic diagram with the second swing arm for first swing arm of the embodiment of the present invention；
Fig. 8 is the attachment structure schematic diagram with cylinder cap for second swing arm of the embodiment of the present invention；
Fig. 9 is the sectional view of Fig. 8；
Figure 10 is the structural representation of the second swing arm of the embodiment of the present invention；
Figure 11 is the structural representation of the back-moving spring of the present invention；
Figure 12 is the structural representation of the jump ring of the present invention；
Figure 13 is first cam of the present invention and the initial marker locations schematic diagram of the second cam；
Figure 14 is that the valve actuating mechanism of the present invention is located at structural representation during initial position；
Figure 15 is that the valve of the valve actuating mechanism of the present invention is in structural representation during opening；
Structural representation when Figure 16 is closed for the valve of the valve actuating mechanism of the present invention；
When Figure 17 is in opening and closed mode for the valve of the valve actuating mechanism of the present invention, the position view of valve rocker roller；
Figure 18 is mentality of designing schematic diagram of the present invention, the rotation axiss determining the second swing arm, the link position determining the first swing arm and the second swing arm, determines driving face First segmental arc；
Figure 19 is mentality of designing schematic diagram of the present invention, determine the first cam and the position of the second cam, the first basic circle of the first cam and the second basic circle, the of the second cam Three basic circles and the 4th basic circle；
Figure 20 is mentality of designing schematic diagram of the present invention, determines the 3rd segmental arc in driving face；
Figure 21 is mentality of designing schematic diagram of the present invention, determines second segmental arc in driving face；
Figure 22 is mentality of designing schematic diagram of the present invention, determines the basic structure of the second swing arm；
Figure 23 is mentality of designing schematic diagram of the present invention, determines the basic structure of the first swing arm, determine the first basic circle of the first cam and the first roller against and the second cam 4th basic circle and the second roller against when, the position of the first swing arm and the second swing arm；
Figure 24 is mentality of designing schematic diagram of the present invention, determine the first basic circle of the first cam and the first roller against and the 3rd basic circle of the second cam and the second roller against when, First swing arm and the position of the second swing arm；
Figure 25 is mentality of designing schematic diagram of the present invention, determine the second basic circle of the first cam and the first roller against and the 3rd basic circle of the second cam and the second roller against when, First swing arm and the position of the second swing arm；
Figure 26 is mentality of designing schematic diagram of the present invention, determine the second basic circle of the first cam and the first roller against and the 4th basic circle of the second cam and the second roller against when, First swing arm and the position of the second swing arm；
Figure 27 is first cam of first embodiment of valve actuating mechanism of the present invention and the molded line schematic diagram of the second cam；
Figure 28 is the valve lift diagram of valve actuating mechanism shown in Figure 27；
Figure 29 is first cam of second embodiment of valve actuating mechanism of the present invention and the molded line schematic diagram of the second cam；
Figure 30 is the valve lift diagram of valve actuating mechanism shown in Figure 29；
Figure 31 is first cam of the 3rd embodiment of valve actuating mechanism of the present invention and the molded line schematic diagram of the second cam；
Figure 32 is the valve lift diagram of valve actuating mechanism shown in Figure 31.
Description of reference numerals：
1000- valve actuating mechanism, 2000- cylinder cap, 2002- hole eight, 1- valve mechanism, 11- valve, 2- swing arm unit, 21- first swing arm, 211- first intermediate link arm Portion, 2111- hole three, 2112- hole four, 212- the first swing arm portion, 2121- hole one, 2122- hole two, 213- groove, 22- second swing arm, the driving face of 220-, c1- One segmental arc, c2- second segmental arc, c3- the 3rd segmental arc, 221- the second intermediate link arm portion, 222- the second swing arm portion, 2221- hole five, 2222- hole six, 31- One roller, 32- second roller, 41- first camshaft, 411- first cam, a1- the first molded line first paragraph, a2- the first molded line second segment, the 3rd section of a3- first molded line, The 4th section of a4- first molded line, the 5th section of a5- first molded line, the 6th section of a6- first molded line, the 7th section of a7- first molded line, 42- second camshaft, 421- second cam, B1- the second molded line first paragraph, b2- the second molded line second segment, the 3rd section of b3- second molded line, the 4th section of b4- second molded line, the 5th section of b5- second molded line, b6- second molded line 6th section, the 7th section of b7- second molded line, R1- first basic circle, R2- second basic circle, R3- the 3rd basic circle, R4- the 4th basic circle, P- junction point, the sub- bearing pin of 51- first, 52- Second sub- bearing pin, 53- second bearing pin, 54- the 3rd bearing pin, 61- valve rocker, 611- valve rocker roller, 62- hydraulic tappet, 71- support, 81- back-moving spring, 811- first end, 812- the second end, 813- pars intermedia, 91- phaser, 92- jump ring.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment can be mutually combined.
To describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
The body group of electromotor is the support of electromotor, is the matrix of toggle, valve actuating mechanism and the assembling of each system.In the art, usually, body group Mainly it is made up of cylinder block, cylinder cap, head gasket and oil sump etc., oil sump is generally located in the bottom of cylinder block, and cylinder cap is located at the top of cylinder block, and head gasket sets Between the top surface of cylinder block and the bottom surface of cylinder cap, for sealing gap therebetween.
Cylinder cap forms combustor together with top land and cylinder, and the top of combustor has air inlet and air vent, the valve of valve mechanism be located in cylinder cap and close into QI KOU and air vent.For existing general electromotor, adopt the valve form of Two In and Two Out, minority also has the valve form entering scene 2 using one-in-and-one-out or three more.
For same electromotor, typically all there are multiple different operating modes, such as low speed small load condition, high speed high load working condition etc., when electromotor is in different operating modes Under, externally the moment of torsion of output and power are different to electromotor, and the content of the harmful gass of engine emission is also different simultaneously, and the valve actuating mechanism of electromotor is according to each cylinder The cycle of operation inside carrying out and the requirement of firing order, timing opening and closing inlet valve and exhaust valve.
Usually, valve actuating mechanism can adjust the lift amount of valve, but regulative mode single it is impossible to meet use requirement well.Distribution according to embodiments of the present invention Mechanism can realize the secondary opening of valve, simultaneously also can proper extension valve opening time, regulative mode is various, thus preferably meeting the requirement of different operating modes.
It is appreciated that valve actuating mechanism according to embodiments of the present invention can be used for the valve event driving air inlet side naturally it is also possible to be used for driving the valve event of exhaust side, Or it is simultaneously used in air inlet side and exhaust side to drive corresponding valve event.
Referring to Fig. 1-Figure 32, the valve actuating mechanism 1000 for electromotor according to embodiments of the present invention is described.As shown in Fig. 1-Fig. 3, Figure 14-Figure 16, according to this The valve actuating mechanism 1000 for electromotor of bright embodiment include valve mechanism 1, the swing arm unit 2 including the first swing arm 21 and the second swing arm 22, the first roller 31, the Two rollers 32, the first camshaft 41, the second camshaft 42 and phase-regulating mechanism.
Wherein, valve mechanism 1 is prior art, and is well known to those skilled in the art, and such as valve mechanism 1 can include valve 11, and valve 11 can be along The centrage of valve 11 moves back and forth up and down air inlet or the air vent to open or close combustor in valve 11 conduit, can be with prior art using identical for these The part of setting, is not detailed herein.
As shown in Figure 14-Figure 16, the substructure of swing arm unit 2 has driving face 220, driving face 220 be suitable to drive valve mechanism 1 valve 11 along parallel to The direction motion of valve centrage.It should be appreciated that those skilled in the art can the concrete line style in the driving face of flexible design 220 according to actual needs.
As shown in Figure 3 and Figure 7, swing arm unit 2 includes the first swing arm 21 and the second swing arm 22, and the second swing arm 22 is pivotably coupled to the bottom of the first swing arm 21, Around rotation axiss rotatably that is to say, that the first swing arm 21 and the second swing arm 22 can relatively rotate, the second swing arm 22 also can rotate around rotation axiss for second swing arm 22, The substructure of the second swing arm 22 has driving face 220.
First roller 31 and the second roller 32 is all pivotally arranged on swing arm unit 2 that is to say, that the first roller 31 is located on swing arm unit 2 and with respect to swing arm Pivotably, the second roller 32 is located on swing arm unit 2 and pivotable with respect to swing arm unit 2 assembly 2.As shown in Figure 4 and Figure 5, the first roller 31 and the second roller 32 are all pivotally arranged in the first swing arm 21.(swing arm unit 2)
As shown in Fig. 2, Figure 14-Figure 16, the first camshaft 41 and the second camshaft 42 be arranged in parallel, and the first camshaft 41 and the second camshaft 42 drive swing arm jointly Assembly 2.First camshaft 41 has the first cam 411, and the second camshaft 42 has the second cam 421, and the first cam 411 and the second cam 421 can be fitted in respectively On corresponding axle.
According to some embodiments of the present invention, each of the first cam 411 and the second cam 421 are respectively provided with big basic circle (the first basic circle R1 in such as Figure 29 and Three basic circle R3), little basic circle (the second basic circle R2 in such as Figure 29 and the 4th basic circle R4) and be connected to changeover portion (the such as Figure 29 between big basic circle and little basic circle In the 3rd section of a3 of the first molded line, the 5th section of a5 of the first molded line, the second molded line second segment b2, the 5th section of b5 of the second molded line), but not limited to this, for the skill of this area For art personnel, can the molded line of adaptive settings cam according to actual needs.
As shown in Figure 27, Figure 29 and Figure 31, against the first roller 31 and the second cam 421 is against the second roller 32, thus in the first camshaft 41 for the first cam 411 When rotating with the second camshaft 42, the big basic circle of the first cam 411, little basic circle and changeover portion can be contacted with the first roller 31 respectively, similarly, the second camshaft 42 Big basic circle, little basic circle and changeover portion can be contacted with the second roller 32, when the diverse location of respective cams is with corresponding roller contact, after swing arm unit 2 action respectively Drive valve 11 mobile.
Phase-regulating mechanism is used for adjusting the relative phase of the first camshaft 41 and the second camshaft 42, thus changing the relative phase of the first cam 411 and the second cam 421 Position.According to one embodiment of present invention, phase-regulating mechanism can be phaser 91, and phaser 91 can be single rotor phaser 91, i.e. only one of which rotor, turn Son can be connected with one of the first camshaft 41 and the second camshaft 42, to adjust the phase place of relatively another camshaft of this camshaft, for example, in an enforcement of the present invention In example, phaser 91 is arranged on the second camshaft 42, and the first camshaft 41 is connected with phaser 91 by gear, thus it is convex to realize the first camshaft 41 and second The constant speed adverse movement of wheel shaft 42 it will be appreciated that the relative phase that phaser 91 adjusts two camshafts has been prior art, the concrete structure to phaser 91 here Make, the concrete operating principle of phaser 91 and regulation process do not make specified otherwise.
In short, valve actuating mechanism 1000 according to embodiments of the present invention, structure is simple, and can realize secondary opening of air valve and valve opening by designing different cam profiles Open that the duration is variable, the valve duration phase is variable and variable valve lift.Its swing arm unit 2 of valve actuating mechanism 1000 simultaneously according to embodiments of the present invention is simpler, Compact, parts are few, low cost, and are easily controlled.
Describe valve actuating mechanism 1000 according to embodiments of the present invention referring to Fig. 1-Figure 14 in detail.
First swing arm 21 includes the first intermediate link arm portion 211 and two the first swing arm portions 212, and two the first swing arm portions 212 are respectively provided at the first intermediate link arm portion 211 Two ends, two the first swing arm portions 212 are oppositely arranged and along the axially spaced from each other of the first camshaft 41 and the second camshaft 42 it is preferable that the first intermediate link arm Portion 211 be may be integrally formed with two the first swing arm portions 212, thus can reduce processing step, and intensity is high, low cost.
Further, as shown in figure 4, the first roller 31 is pivotally arranged between two the first swing arm portions 212 by the first sub- bearing pin 51, the second roller 32 passes through Second sub- bearing pin 52 is pivotally arranged between two the first swing arm portions 212, the first intermediate link arm portion 211 pass through the second bearing pin 53 pivotly with the second swing arm 22 It is connected, the central axis of the central axis of the first sub- bearing pin 51, the central axis of the second sub- bearing pin 52 and the second bearing pin 53 is located on three seamed edges of a triangular prism, I.e. on same section, the center of the first roller 31, the center of the second roller 32, the second bearing pin 53 are centrally located on three summits of same triangle, and thus The structure of one swing arm 21 is simple, easy to manufacture, low cost.
In some specific embodiments of the present invention, the first swing arm 21 is triangular structure, and in addition to an angle being connected with the second bearing pin 53, remaining two angle is respectively First roller 31 and the second roller 32 are installed.
As shown in Figure 8 and Figure 9, the second swing arm 22 is suitable to be rotatably arranged on the cylinder cap 2000 of electromotor by the 3rd bearing pin 54, the central axis of the 3rd bearing pin 54 With the rotation axis coincident of the second swing arm 22, positioned between the second bearing pin 53 and driving face 220, the structure by this swing arm unit 2 is simpler for the 3rd bearing pin 54, Take up room little.
As shown in figure 8, the second swing arm 22 includes the second intermediate link arm portion 221 and two the second swing arm portions 222, two the second swing arm portions 222 are respectively provided in the middle of second The two ends of arm portions 221, two the second swing arm portions 222 are oppositely arranged and along the axially spaced from each other of the first camshaft 41 and the second camshaft 42 it is preferable that Two intermediate link arm portions 221 be may be integrally formed with two the second swing arm portions 222, thus can reduce processing step, and intensity is high, low cost.
Further, as shown in fig. 7, the first intermediate link arm portion 211 is pivotally arranged between two the second swing arm portions 222 by the second bearing pin 53, two second Swing arm portion 222 is suitable to by the 3rd bearing pin 54 on the cylinder cap 2000 being rotatably arranged at electromotor.
Specifically, as shown in Figure 5 and Figure 6, the first swing arm 21 has hole 1, hole 2 2122, hole 3 2111, hole 4 2112 and groove 213, such as scheme Shown in 10, the second swing arm 22 has hole 5 2221, hole 6 2222 and driving face 220.As shown in figure 9, cylinder cap 2000 is provided with hole seven and hole 8 2002.
As Figure 4-Figure 6, the first roller 31 is contained in the side in two the first swing arm portions 212 of the first swing arm 21 by the first sub- bearing pin 51, hole 1, and the One roller 31 can around the first sub- bearing pin 51 freely rotatable and can with the first camshaft 41 on the first cam 411 against and tangent.
As Figure 4-Figure 6, the second roller 32 is contained in the opposite side in two the first swing arm portions 212 in the first swing arm 21 by the second sub- bearing pin 52, hole 2 2122, And second roller 32 can around the second sub- bearing pin 52 freely rotatable and can with the second camshaft 42 on the second cam 421 against and tangent.Wherein, the first roller 31 and Two roller 32 size shape is identical.
As shown in Fig. 4, Fig. 7 and Figure 10, the first swing arm 21 and the second swing arm 22 are assembled together by hole 3 2111, hole 5 2221, the second bearing pin 53, the first pendulum Arm 21 can relatively rotate with the second swing arm 22.Hole 4 2112 is connected with groove 213 and hole 3 2111 respectively, provides lubricating oil to hole 3 2111, plays lubrication second The effect of bearing pin 53, groove 213 is arranged on the relative inner in two the first swing arm portions 212, avoids roller (i.e. the first roller 31 and the second roller 32), convex to play The effect of wheel (i.e. the first cam 411 and the second cam 421), it is to avoid interfere, the effect of loss of weight can be played simultaneously.
Further, as shown in fig. 7, the both sides of the second bearing pin 53 can also be respectively equipped with a jump ring 92, the first swing arm 21 and the second swing arm 22 are folded in two cards Between spring 92, thus defining the first swing arm 21 and the second swing arm 22 position in the axial direction.
As shown in Figure 9 and Figure 10, hole 6 2222 is passed through in the second swing arm 22, the 3rd bearing pin 54 is assemblied on the hole seven of cylinder cap 2000, and hole seven is used for assembling the 3rd bearing pin 54, hole 8 2002 is connected for collecting the lubricating oil in cylinder cap 2000 with hole seven, and supplies the 3rd bearing pin 54 to be lubricated to the 3rd bearing pin 54.
Further, as shown in fig. 7, the both sides of the 3rd bearing pin 54 can also be respectively equipped with a jump ring 92, the second swing arm 22 is folded between two jump rings 92, from And define the second swing arm 22 position in the axial direction.
In this some embodiment, as shown in Figure 14-Figure 16, valve actuating mechanism 1000 also includes valve rocker 61 and hydraulic tappet 62, and valve rocker 61 is provided with gas Door rocking arm roller 611, the one end fits of the top of valve 11 and valve rocker 61, hydraulic tappet 62 is coordinated with the other end of valve rocker 61, and driving face 220 is supported Lean against on valve rocker roller 611.Thus, in swing arm unit 2 action, the driving face 220 of its bottom can promote valve rocker roller 611 to drive valve rocker 61 Action, valve rocker 61 and then drive valve 11 action are to open valve 11.
Hydraulic tappet 62 can be used for valve gap adjustment, and the specific configuration of hydraulic tappet 62 and operation principle have been prior art, and are widely used in this area, example As being applied in VVL technology, therefore here hydraulic tappet 62 is not described in detail.
As illustrated in fig. 7 and fig. 10, driving face 220 is formed at the bottom of the second swing arm 22, and driving face 220 is contacted and tangent with valve rocker roller 611, drives Type face 220 includes the first segmental arc c1, the second segmental arc c2 and the 3rd segmental arc c3, the second segmental arc c2 be connected to the first segmental arc c1 and the 3rd segmental arc c3 it Between, and the second segmental arc c2 is tangent with the first segmental arc c1 and the 3rd segmental arc c3 respectively.
Further, as shown in Figure 10, the second segmental arc c2 with the distance of rotation axiss (i.e. the central axis in hole 6 2222) from being connected with the first segmental arc c1 One end is gradually increased to the second end being connected with the 3rd segmental arc c3, and the distance of the 3rd segmental arc c3 and rotation axiss (i.e. the central axis in hole 6 2222) is from second The first end that segmental arc c2 is connected is gradually increased to the second end away from the second segmental arc c2.Second swing arm 22 can rotate around the 3rd bearing pin 54, and passes through driving face 220 drive valve rocker 61 with the cooperation of valve rocker roller 611, and then drive valve 11.
Further, as shown in Fig. 2 valve actuating mechanism 1000 can also include support 71, support 71 is used for supporting the first camshaft 41 and the second camshaft 42. That is, support 71 can be the installation carrier of the first camshaft 41 and the second camshaft 42, the first camshaft 41 and the second camshaft 42 are bearing in support First swing arm 21 can also be play supporting role on 71, so that the first roller 31 and the first cam 411 and the second roller 32 and the second cam 421 are in valve actuating mechanism Contact is remained in 1000 motor process.
Oil duct can be disposed with support 71, oil duct can provide lubricating oil to the axle journal of described first camshaft 41 and the second camshaft 42 and phase-regulating mechanism, Support 71 can be bolted with cylinder cap 2000 and be assembled together.
In this some embodiment, valve actuating mechanism 1000 can also include back-moving spring 81, and back-moving spring 81 can include first end 811, the second end 812 and connect It is connected on the pars intermedia 813 between first end 811 and the second end 812, first end 811 and the second end 812 are suitable to flexibly be pressed in the second swing arm 22, in Between on portion 813 cylinder cap 2000 that is suitable to be fixed on electromotor.
Specifically, as shown in figure 11, back-moving spring 81 the right and left is symmetrical, middle setting pars intermedia 813, and both sides are respectively provided with first end 811 and the second end 812, Back-moving spring 81 can be fixed on cylinder cap 2000 by pars intermedia 813 and bolt, simultaneously the first end 811 on both sides and the second end 812 and the second swing arm 22 Contact, after assembling, back-moving spring 81 has a pretightning force making the second swing arm 22 rotate counterclockwise trend, in valve 11 opening process, the elastic force of back-moving spring 81 Increase, in valve 11 closing process, initial position is back to the second swing arm 22 and plays an assosting effect, additionally, back-moving spring 81 is additionally operable to keep the second swing arm 22 Driving face 220 contact with valve rocker roller 611 all the time.
In specific example shown in Fig. 1-Figure 13, the high setting such as the first camshaft 41 and the second camshaft 42, that is, the first camshaft 41 and the second camshaft 42 are arranged In same level, and the first camshaft 41 and the second camshaft 42 are realized constant speed by gear and are rotated backward, and gear can arrange timing marks it is ensured that timing Accuracy.After assembling, as shown in figure 13, at the first roller 31 and the initial marker locations of the first cam 411 against and tangent, the second roller 32 and the second cam 421 Initial marker locations at against and tangent, after the first camshaft 41 and the second camshaft 42 rotate, the first cam 411 drives the first roller 31 and the second cam 421 Drive the second roller 32, drive the second swing arm 22 to rotate (for example, rotating clockwise) around rotation axiss by the swing of the first swing arm 21, the second swing arm 22 driving Face 220 acts on valve rocker roller 611, and then drives valve 11 so that valve 11 is turned on and off.
Of course, it should be understood that in further embodiments, the first camshaft 41 and the second camshaft 42 can not also be contour.
The work process of according to embodiments of the present invention valve actuating mechanism 1000 is briefly described referring to Figure 14-Figure 16：
Each of first cam 411 and the second cam 421 are respectively provided with big basic circle (the first basic circle R1 in such as Figure 29 and the 3rd basic circle R3), little basic circle (for example The second basic circle R2 in Figure 29 and the 4th basic circle R4) and be connected to changeover portion between big basic circle and little basic circle (the 3rd section of a3 of the first molded line in such as Figure 29, The 5th section of a5 of one molded line, the second molded line second segment b2, the 5th section of b5 of the second molded line).
In some specific embodiments, changeover portion can comprise breeze way and active section.Its medium and small basic circle is the zero lift section of this cam, and big basic circle is rising higher most of cam Journey section.Cam lift is selected as needed, such as, in some specific examples of the present invention, cam lift is 4mm.
When the first roller 31 and the first cam 411 big basic circle against and the second roller 32 and the second cam 421 big basic circle against when, the 3rd arc in driving face 220 Shape section c3 is contacted with valve rocker roller 611, and valve 11 is in fully opened；
When the first roller 31 and the first cam 411 little basic circle against and the second roller 32 and the second cam 421 big basic circle against when, or the first roller 31 and The big basic circle of one cam 411 against and the second roller 32 and the second cam 421 little basic circle against when, the first segmental arc c1 in driving face 220 and valve rocker roller 611 contacts, valve 11 is in the completely closed state；
When the first roller 31 and the first cam 411 little basic circle against and the second roller 32 and the second cam 421 little basic circle against when, first arc in driving face 220 Shape section c1 is contacted with valve rocker roller 611, and valve 11 is in the completely closed state.
As shown in figure 14, the first cam 411 and the second cam 421 are located at initial position, with rotating counterclockwise of the first camshaft 41, the second camshaft 42 suitable Hour hands rotate, and the first camshaft 41 drives the second roller 32 that the first roller 31 being connected with the first swing arm 21 and the second camshaft 42 driving are connected with the first swing arm 21, Against the big basic circle of the first cam 411, it is convex that the rest position of the second roller 32 and the second cam 421 is transitioned into second from the little basic circle of the second cam 421 to first roller 31 During the big basic circle of wheel 421, drive the second roller 32, so that the first swing arm 21 is swung, and drive the second swing arm 22 to rotate clockwise, drive valve 11, make gas Door 11 unlatching, as shown in figure 15.
The big basic circle of subsequent second roller 32 and the second cam 421 is against the rest position of the first roller 31 and the first cam 411 is from the big basic circle mistake of the first cam 411 During crossing the little basic circle of the first cam 411, the second swing arm 22 likes turning anticlockwise in the assosting effect of back-moving spring 81, and valve 11 is closed, as shown in figure 16.
Adjust the phase place of the first camshaft 41 and the second camshaft 42 by phase-regulating mechanism, change the cooperation phase place of the first camshaft 41 and the second camshaft 42, that is, Change the fit system of the cam profile of the first cam 411 and the second cam 421, thus changing valve lift curve.In some specific examples of the present invention, second is convex The phase adjustment range of wheel shaft 42 is about 30 ° of cam angle.
Describe the design process of the first swing arm 21 and the second swing arm 22 referring to Figure 17-Figure 26 in detail：
The basic input of valve actuating mechanism 1000 design：Two drive cam shaft and valve mechanism 1.
According to valve mechanism 1, a swing arm (the such as second swing arm 22) need to be set to drive valve rocker 61, and then drive valve 11, according to two drive cam shaft, Matched two roller and corresponding cam contact need to be set, and roller is assemblied in swing arm, and camshaft can drive swing arm, and then drive valve 11.
By calculating the degree of freedom of mechanism, determination need to separately arrange a swing arm (for example, the first swing arm 21), and the first swing arm 21 can relatively rotate with the second swing arm 22, with Meet the degree of freedom of mechanism and the assembling of two rollers.
Consider compactedness and the stability of mechanism structure, the second swing arm 22 is contained on cylinder cap 2000 by the 3rd bearing pin 54, can rotate around the 3rd bearing pin 54, the first roller 31 are contained in the first swing arm 21 by the first sub- bearing pin 51, and the first roller 31 can be freely rotatable, and the second roller 32 is contained in the first pendulum by the second sub- bearing pin 52 simultaneously On arm 21, and the second roller 32 can be freely rotatable.
First swing arm 21 is connected with the second swing arm 22 by the second bearing pin 53, and both can relatively rotate, two rollers in the first swing arm 21 respectively with two camshafts Two cam contact are tangent, and meanwhile, two camshafts play a supportive role to the first swing arm 21.
In one embodiment of this present invention, when the valve 11 of valve actuating mechanism 1000 is in the completely closed state and fully opens, the valve rocker roller of valve rocker 61 611 position as shown in figure 17, when wherein round P1 is that valve 11 is in the completely closed state, the position of valve rocker roller 611, circle P2 is in for valve 11 completely During opening, the position of valve rocker roller 611.
The first step, as shown in figure 18, the rotation axiss of selected second swing arm 22, i.e. the position of the center of rotation (i.e. the center in hole 6 2222) of the second swing arm 22, such as O6 in Figure 18, with O6 as the center of circle, makees a round C1, when circle C1 is closed with valve 11, valve rocker roller 611 is tangent, and adjusts the center of rotation of the second swing arm 22 The position of O6, makes the point of contact of circle C1 and valve rocker roller 611 be located at the second of valve rocker roller 611 and limits as upper, at about 135 °.First arc of the second swing arm 22 Shape section c1 is a part of circle C1, and therefore, as long as the first segmental arc c1 contacts tangent with valve rocker roller 611, then valve 11 is closed.
Second step, as shown in figure 18, according to the physical dimension of the second bearing pin 53 and the 3rd bearing pin 54, selectes the center in hole 5 2221 in the second swing arm 22, with second The center of rotation O6 of swing arm 22 is the center of circle, and (for example, in some specific examples of the present invention, this radius is with the distance between hole 5 2221 and hole 6 2222 as radius One circle of 21.5 millimeters of works, in swing process, the center in hole 5 2221 must hole on being made round circular arc, on hole 5 2221 and the first swing arm 21 for the first swing arm 21 3 2111 is concentric.
3rd step, as shown in figure 19, according to arrangement space and cam lift, selectes the position of the first camshaft 41 and the second camshaft 42 and designs the first cam 411 And second cam 421 big basic circle and little basic circle.Design the first roller 31 contact with the big basic circle of the first cam 411 tangent, point of contact be located at first quartile；Second rolling Son 32 contact with the little basic circle of the second cam 421 tangent, point of contact positioned at the second quadrant, with straight line by the center of circle W1 of the first roller 31, the center of circle W2 of the second roller 32 and The center O3 in hole 3 2111 is sequentially connected, and forms a triangle, the as first swing arm 21.
4th step, as shown in figure 20, makees a round C3, when fully opening with valve 11, valve rocker roller 611 is tangent, and point of contact is positioned at the of valve rocker roller 611 Two limits as upper, at about 90 ° to 100 °.3rd segmental arc c3 of the second swing arm 22 by work circle C3 a part.Therefore, as long as the 3rd segmental arc c3 is shaken with valve Arm roller 611 is tangent, then valve 11 be in fully opened, in some specific examples of this present invention, center Z3 (the 3rd segmental arc c3 of the 3rd segmental arc c3 For circular arc, then the center Z3 of the 3rd segmental arc c3 is the center of circle of the 3rd segmental arc c3) distance and between the center of rotation O6 of the second swing arm 22 is 36mm.
5th step, as shown in figure 21, makees a round C2, tangent respectively with the first segmental arc c1 of the second swing arm 22, the 3rd arc, and the arc section between two point of contacts is Second segmental arc c2 of the second swing arm 22, in some specific examples of the present invention, the second segmental arc c2 can be one section of circular arc.In some specific examples of this present invention, A diameter of 32mm of the second segmental arc c2, a diameter of 18mm of the 3rd segmental arc c3.
6th step, as shown in figure 22, is sequentially connected the center of circle of the center of circle O6 of the first segmental arc c1, the center of circle Z2 of the second segmental arc c2, the 3rd segmental arc c3 with straight line Z3, the center of circle O5 in hole 5 2221, the center of circle O6 in hole 6 2222, form two trianglees, the as second swing arm 22.Second segmental arc c2 and the 3rd segmental arc c3 is extremely The distance of the center of rotation O6 of the second swing arm 22 is gradually increased.
7th step, design the first roller 31 contacts tangent with the big basic circle of the first cam 411, and positioned at first quartile, the second roller 32 is big with the second cam 421 at point of contact Basic circle contact is tangent, and point of contact is located at the second quadrant, is sequentially connected the center of circle O3 of the center of circle W1 of the first roller 31 and hole 3 2111 with straight line, forms a triangle, It is the first swing arm 21.
8th step, according to above-mentioned method for designing and cam engagement principle, is completed the first roller 31 and is contacted tangent, the second roller 32 and with the little basic circle of the first cam 411 When the big basic circle of two cams 421 is tangent, the design of the first swing arm 21 and the second swing arm 22；
9th step, according to above-mentioned method for designing and cam engagement principle, is completed the first roller 31 and is contacted tangent, the second roller 32 and with the little basic circle of the first cam 411 When the little basic circle of two cams 421 is tangent, the design of the first swing arm 21 and the second swing arm 22；
Tenth step, ensures under the first step, the 7th step, above-mentioned four kinds of cam engagement states in the 8th step and the 9th step by constraint, the first swing arm 21 and the second swing arm 22 geomery identical it is ensured that point of contact between the first segmental arc c1 and the second segmental arc c2 of the second swing arm 22, the second segmental arc c2 and the 3rd segmental arc c3 tri- The point of contact at point of contact, the first segmental arc c1 and valve rocker roller 611 between section and the point of contact of the 3rd segmental arc c3 and valve rocker roller 611, totally four point of contacts Sequence consensus.
In an embodiment of the present invention, can suitably adjust the second segmental arc c2, the diameter of the 3rd segmental arc c3 of the second swing arm 22 as needed, the first camshaft 41 with And second camshaft 42 position, the distance of the center of the 3rd segmental arc c3 center of rotation to the second swing arm 22.
In an embodiment of the present invention, the above-mentioned cooperation principle according to cam, four kinds of state positions of design the first swing arm 21 and the second swing arm 22.Original design position is： The first roller 31 in first swing arm 21 is contacted with the big basic circle of the first cam 411, and the second roller 32 in the first swing arm 21 is contacted with the little basic circle of the second cam 421, Valve 11 is closed mode, as shown in figure 23.
After first camshaft 41 and the second camshaft 42 constant speed rotate backward, the first roller 31 is contacted with the big basic circle of the first cam 411, and the second roller 32 is convex with second Wheel 421 contact position during the little basic circle of the second cam 421 goes to the big basic circle of the second cam 421, the first swing arm 21 with the first cam 411 be support, Under the driving of the second cam 421, drive the second swing arm 22 to rotate clockwise, drive valve 11, so that valve 11 is opened, as shown in figure 24.
After valve 11 completes to open, the second roller 32 is contacted with the big basic circle of the second cam 421, and the first roller 31 is convex from first with the contact position of the first cam 411 During the big basic circle of wheel 411 goes to the little basic circle of the first cam 411, the second swing arm 22, in the presence of valve 11 spring and back-moving spring 81, rotates counterclockwise, Valve 11 is closed, and such as Figure 25 shows.
Figure 26 is that the first roller 31 is contacted with the little basic circle of the first cam 411 and the second roller 32 is contacted with the little basic circle of the second cam 421, valve 11 closed mode Position.
Structure with reference to above-mentioned valve actuating mechanism 1000 describes three kinds of different cam profiles in detail, and valve actuating mechanism 1000 can realize difference using different cam profiles Technique effect, such as secondary opening of air valve and valve duration phase are variable, the valve duration phase is variable and variable valve lift.
Describe a kind of achievable secondary opening of air valve with reference to Figure 27 and Figure 28 and open duration variable cam profile.
So that the first camshaft 41 and the second camshaft 42 are located at same level and the first camshaft 41 and the second camshaft 42 constant speed adverse movement as a example, as Figure 27 institute Show, the first cam 411 has the first cam profile, the first cam profile include along the first cam 411 circumference successively end to end first molded line first paragraph a1, first Molded line second segment a2, the 3rd section of a3 of the first molded line, the 4th section of a4 of the first molded line, the 5th section of a5 of the first molded line, the 6th section of a6 of the first molded line and the 7th section of a7 of the first molded line.
Second cam 421 has the second cam profile, the second cam profile include along the second cam 421 circumference successively end to end second molded line first paragraph b1, second Molded line second segment b2, the 3rd section of b3 of the second molded line, the 4th section of b4 of the second molded line, the 5th section of b5 of the second molded line, the 6th section of b6 of the second molded line and the 7th section of b7 of the second molded line.
When the first roller 31 against the first molded line first paragraph a1 and the second roller 32 against the second molded line first paragraph b1 when, valve 11 is in the first closed mode, i.e. gas Door 11 completely closes.
When the first roller 31 against the first molded line second segment a2 and the second roller 32 against the second molded line second segment b2 when, valve 11 is in an open stage, i.e. gas Door 11 moves to maximum lift position from zero lift position.
When the first roller 31 against the 3rd section of a3 of the first molded line and the second roller 32 against the 3rd section of b3 of the second molded line when, valve 11 is in a dwell period, i.e. gas Door 11 moves to zero lift position from maximum lift position.
When the first roller 31 against the 4th section of a4 of the first molded line and the second roller 32 against the 4th section of b4 of the second molded line when, valve 11 is in the secondary opening stage, i.e. gas Door 11 moves to intermediate lift position from zero lift position, and this intermediate lift position is located between zero lift position and maximum lift position.
When the first roller 31 against the 5th section of a5 of the first molded line and the second roller 32 against the 5th section of b5 of the second molded line when, valve 11 is in secondary dwell period, i.e. gas Door 11 moves to zero lift position from middle lift location.
When the first roller 31 against the 6th section of a6 of the first molded line and the second roller 32 against the 6th section of b6 of the second molded line when, valve 11 is in the second closed mode, i.e. gas Door 11 completely closes.
When the first roller 31 against the 7th section of a7 of the first molded line and the second roller 32 against the 7th section of b7 of the second molded line when, valve 11 is in the 3rd closed mode, i.e. gas Door 11 completely closes.
It is understood that when valve 11 is in the first closed mode, the second closed mode and three closed modes, valve 11 is in completely closing the stage, but with The corresponding cam profile of above-mentioned three kinds of closed modes differs.
Due to the first cam 411 and the second cam 421 constant speed adverse movement, the first cam 411 rotates from starting point (as Figure 27 around the rotation axiss of the first cam 411 A point on first cam 411, the i.e. starting point of the first molded line first paragraph a1) rotate in an anti-clockwise direction one week when, the second cam 421 is around the rotary shaft of the second cam 421 Line rotates backward one week that is to say, that determining A point clockwise from starting point (the B point on as the second cam 421 Figure 27, the i.e. starting point of the second molded line first paragraph b1) Justice is 0 ° of cam angle moment of the first cam 411, B point is defined as 0 ° of cam angle moment of the second cam 421.
The valve mechanism 1 of the valve actuating mechanism 1000 of the present invention is driven commonly through swing arm unit 2 by the first camshaft 41 and the second camshaft 42, above-mentioned with the present invention As a example cam profile is applied to four-stroke engine, the first camshaft 41 and the second camshaft 42 constant speed rotate backward, and the first camshaft 41 and the second camshaft 42 Rotating speed is 1 with the rotating ratio of the bent axle of electromotor:2, the cam angle moment that cam is gone to 180 ° from 0 ° of cam angle moment is the exhaust top dead center moment, according to four punchings The operation principle of journey electromotor, then be expansion stroke in the range of 0 ° to 90 ° of cam angle, 90 ° to 180 ° of cam angle is exhaust stroke, 180 ° to 270 ° Cam angle is induction stroke, and 270 ° to 360 ° of cam angle for compression stroke it is contemplated that engine with supercharger, in embodiments of the invention, rush by exhaust stroke and air inlet Journey accounts for 120 ° of cam angle.
In order to ensure to need on the accuracy of the timing of valve actuating mechanism 1000, the first cam 411 and the second cam 421 to arrange initial marker locations, such as in the present invention Some specific embodiments in, as shown in Figure 13 and Figure 27, the initial marker locations (corresponding with A point) of corresponding first cam 411 of a cylinder of electromotor are in one The first quartile of individual cartesian coordinate system, and the line of rotation axiss of this initial marker locations and the first cam 411 is 54 ° with horizontal angle, the first of remaining cylinder Cam 411, based on a cylinder, according to the steering of the first camshaft 41, is fitted on the first camshaft 41 by firing interval；Corresponding second cam of one cylinder of electromotor 421 initial marker locations (corresponding with B point) are in the second quadrant of a cartesian coordinate system, and the rotation axiss of this initial marker locations and the second cam 421 Line and horizontal angle are 108 °, and the first cam 411 of remaining cylinder, based on a cylinder, according to the steering of the first camshaft 41, is fitted in first by firing interval On camshaft 41.
As shown in figure 27, the first molded line first paragraph a1, the first molded line second segment a2, the 6th section of a6 of the first molded line and the 7th section of a7 of the first molded line are located at the first camshaft 41 central axis (i.e. rotation axiss of the first cam 411) is on the first basic circle R1 in the center of circle.
As shown in figure 27, the junction point P of the 3rd section of a3 of the first molded line and the 4th section of a4 of the first molded line is located at the second base with the central axis of the first camshaft 41 as the center of circle On circle R2, the radius of the first basic circle R1 is more than the radius of the second basic circle R2.
As shown in figure 27, the distance of the central axis of the 3rd section of a3 to first camshaft 41 of the first molded line is gradually reduced to junction point P from the one end away from junction point P, I.e. when the first cam 411 rotate counterclockwise, the distance of the point of contact of the 3rd section of a3 of the first molded line and the first roller 31 central axis to the first camshaft 41 is gradually reduced.
The distance of the central axis of the 4th section of a4 of the first molded line and the 5th section of a5 to first camshaft 41 of the first molded line is from the 5th section of a5 of junction point P to first molded line and One end that the 6th section of a6 of one molded line is connected is gradually increased, that is, when the first cam 411 rotate counterclockwise, the point of contact of the 4th section of a4 of the first molded line and the first roller 31 to the The distance of the central axis of one camshaft 41 is gradually increased, the distance of the point of contact of the 5th section of a5 of the first molded line and the first roller 31 central axis to the first camshaft 41 by Cumulative big, and on the 5th section of a5 of the first molded line, the distance of the central axis to the first camshaft 41 for any point is all higher than equal to any point on the 4th section of a4 of the first molded line to the The distance of the central axis of one camshaft 41.
As shown in figure 27, the 3rd section of b3 of the second molded line and the 4th section of b4 of the second molded line is respectively positioned on (the i.e. rotation of the second cam 421 of the central axis of the second camshaft 42 Axis) for, on the 3rd basic circle R3 in the center of circle, the 3rd basic circle R3 is identical with the radius of the first basic circle R1.
As shown in figure 27, the second molded line first paragraph b1 and the 7th section of b7 of the second molded line is respectively positioned on the 4th basic circle R4 with the central axis of the second camshaft 42 as the center of circle, 4th basic circle R4 is identical with the radius of the second basic circle R2, and that is, the radius of the 3rd basic circle R3 is more than the radius of the 4th basic circle R4.
As shown in figure 27, the distance of the central axis of the second molded line second segment b2 to second camshaft 42 from the one end being connected with the second molded line first paragraph b1 to Second-Type The other end that the 3rd section of b3 of line is connected is gradually increased, that is, when the second cam 421 rotates clockwise, the point of contact of the second molded line second segment b2 and the second roller 32 to second The distance of the central axis of camshaft 42 is gradually increased.
The distance of the central axis of the 5th section of b5 of the second molded line and the 6th section of b6 to second camshaft 42 of the second molded line is from the 5th section of b5 of the second molded line and the second molded line the 4th One end that section b4 is connected is gradually reduced to the 7th section of one end that b7 is connected of the 6th section of b6 of the second molded line and the second molded line, that is, when the second cam 421 turns clockwise, The distance of the central axis to the second camshaft 42 for the point of contact of the 5th section of b5 of the second molded line and the second roller 32 is gradually reduced, and the 6th section of b6 of the second molded line and the second roller The distance of the central axis to the second camshaft 42 for 32 point of contact is gradually reduced, and on the 5th section of b5 of the second molded line any point to the central axis of the second camshaft 42 Distance is all higher than the distance equal to the central axis to the second camshaft 42 for any point on the 6th section of b6 of the second molded line.
For to sum up, the first molded line first paragraph a1, the first molded line second segment a2, the 6th section of a6 of the first molded line and the 7th section of a7 of the first molded line are located at structure on the first basic circle R1 Become the big basic circle of the first cam 411, the junction point P of the 3rd section of a3 of the first molded line and the 4th section of a4 of the first molded line is located at and constitutes the first cam 411 on the second basic circle R2 Little basic circle, the 3rd section of a3 of the first molded line, the 4th section of a4 of the first molded line, the 5th section of a5 of the first molded line all constitute the mistake section section of the first cam 411, and the first cam 411 Cross the distance of the central axis to the first cam 411 for any point in section section all between the radius of the radius of the big basic circle of the first cam 411 and the little basic circle of the first cam 411 Between.
The 3rd section of b3 of second molded line and the 4th section of b4 of the second molded line is located at the big basic circle constituting the second cam 421 on the 3rd basic circle R3, the second molded line first paragraph b1 and second The 7th section of b7 of molded line is located at the little basic circle constituting the second cam 421 on the 4th basic circle R4, the second molded line second segment b2, the 5th section of b5 of the second molded line and the second molded line the 6th Section b6 all constitutes the mistake section section of the second cam 421, and in the mistake section section of the second cam 421 central axis to the second cam 421 for any point distance all between second Between the radius of little basic circle of the radius of big basic circle of cam 421 and the second cam 421.
In a specific embodiment, as shown in figure 27, the first cam 411 and the second cam 421 all around corresponding rotation axiss turn over successively 75 °, 60 °, 60 °, 30°、30°、30°、75°.
It is, of course, understood that in the design process of cam profile, when valve 11 is in different conditions, the angle (i.e. cornerite) that cam turns over around corresponding rotation axiss It is not fixing, can adjust accordingly according to actual needs.
Below so that valve 11 is as exhaust valve as a example, when being briefly described using cam profile shown in Figure 27, the engagement process of the first cam 411 and the second cam 421：
In the range of 0 ° to 75 ° cam angle, exhaust valve is the first closed mode, and the big basic circle of the first cam 411 and the first roller 31 are against the second cam 421 Little basic circle and the second roller 32 against；
In the range of 75 ° to 135 ° cam angles, exhaust valve is in an open stage, and the big basic circle of the first cam 411 and the first roller 31 are against the second cam 421 and second roller 32 against position transit to the big basic circle of the second cam 421 from the little basic circle of the second cam 421；
In the range of 135 ° to 195 ° cam angles, exhaust valve is in a dwell period, the first cam 411 and the first roller 31 against position from the first cam 411 Big basic circle transit to the little basic circle of the first cam 411, the big basic circle of the second cam 421 and the second roller 32 against；
In the range of 195 ° to 225 ° cam angles, exhaust valve is in the secondary opening stage, the first cam 411 and the first roller 31 against position from the first cam 411 Little basic circle transit to the changeover portion of the first cam 411, the big basic circle of the second cam 421 and the second roller 32 against；
In the range of 225 ° to 255 ° cam angles, exhaust valve is in secondary dwell period, the first cam 411 and the first roller 31 against position from the first cam 411 Changeover portion transit to the big basic circle of the first cam 411, the second cam 421 and the second pipe against position transit to the second cam 421 from the big basic circle of the second cam 421 Changeover portion；
In the range of 255 ° to 285 ° cam angles, exhaust valve is in the second closed mode, and the big basic circle of the first cam 411 and the first roller 31 are against the second cam 421 and second roller 32 against position transit to the little basic circle of the second cam 421 from the changeover portion of the second cam 421；
In the range of 285 ° to 360 ° cam angles, exhaust valve is in the 3rd closed mode, and the big basic circle of the first cam 411 and the first roller 31 are against the second cam 421 little basic circle and the second roller 32 against.
For to sum up, after the first cam 411 starts to turn over 75 ° of cam angles from 0 °, the changeover portion of the second roller 32 beginning and the second cam 421 is against accordingly First roller 31 still with the big basic circle of the first cam 411 against valve 11 starts to open and enter an open stage, and valve 11 is from start-up time to once closing The process closing the moment accounts for 120 ° of cam angle, and that is, taking four-stroke engine as a example, exhaust stroke and induction stroke account for 120 ° of cam angle.Valve 11 completes once After dwell period, the corresponding cam angle of big basic circle of the second cam 421 there remains 30 ° not with the second roller 32 against.Subsequently, the entrance secondary opening stage, first The rest position of roller 31 and the first cam 411 transits to the changeover portion of the first cam 411 from the little basic circle of the first cam 411, and the second roller 32 continues to convex with second The big basic circle of wheel 421 is against secondary opening of air valve process accounts for 30 ° of cam angle.Hereafter, the rest position of the second roller 32 and the second cam 421 is from the second cam 421 big basic circle transits to the changeover portion of the second cam 421, and valve 11 enters secondary dwell period；Valve is secondary close after, the first roller 31 and the first cam 411 Big basic circle against the rest position of the second roller 32 and the second cam 421 transits to the little basic circle of the second cam 421, valve 11 from the changeover portion of the second cam 421 It is in the second closed mode, the 3rd closed mode successively, until next new circulation.
Valve lift curve Changing Pattern as shown in figure 28, when entering a new circulation, adjusts the phase place of the second camshaft 42, example clockwise by phaser 91 As made 5 ° in advance of the phase place of the second cam 421, valve 11 opens 5 ° in advance, after valve 11 unlatching, has 5 degree of a unlatching duration, the lift of secondary opening and holding Renew corresponding minimizing, adjust the phase place of the second camshaft 42, the second camshaft 42 phase adjustment range design load is 30 ° of cam angles, i.e. the phase place of the second cam 421 The scope that can shift to an earlier date more than or equal to 0 ° of cam angle and less than or equal in the range of 30 ° of cam angles, for example, 5 °, 10 °, 15 °, 20 °, 25 ° or 30 °.
In short, valve actuating mechanism 1000 according to embodiments of the present invention, using above-mentioned cam profile, and adjust the first camshaft 41 and the by adjusting phase adjusted structure The relative phase of two camshafts 42, the achievable valve duration phase is variable and achievable secondary opening of air valve.When this valve actuating mechanism 1000 is applied to exhaust side, i.e. gas When door 11 is exhaust valve, realize the secondary opening of exhaust valve, engine cold-start performance and rapid warming-up can be improved, reduce discharge, and exhaust valve secondary opening, control Internal EGR processed, can significantly change the temperature of working medium in the EGR amount in cylinder, and then impact cylinder, thus realizing the control of gasoline HCCI burning, utilize exhaust valve two simultaneously Secondary unlatching strategy can predict the load range of gasoline CAI burning.
A kind of according to embodiments of the present invention cam is briefly described below, this cam is the first cam 411 shown in Figure 27, the molded line of this cam is first shown in Figure 27 Cam profile, including the circumference along cam successively end to end cornerite be 75 ° the first molded line first paragraph a1, cornerite be 60 ° of the first molded line second segment a2, cornerite The 3rd section of a3 of the first molded line for 60 °, cornerite be 30 ° the 4th section of a4 of the first molded line, cornerite be 30 ° the 5th section of a5 of the first molded line, cornerite be 30 ° first The 6th section of a6 of molded line and the 7th section of a7 of the first molded line that cornerite is 75 °, the first molded line first paragraph a1, the first molded line second segment a2, the 6th section of a6 and first of the first molded line The 7th section of a7 of molded line is located on the first basic circle R1 with the rotation axiss of cam as the center of circle, and the junction point P of the 3rd section of a3 of the first molded line and the 4th section of a4 of the first molded line is located at On the second basic circle R2 with the rotation axiss of cam as the center of circle, the radius of the first basic circle R1 is more than the radius of the second basic circle R2, the rotation of the 3rd section of a3 of the first molded line to cam The distance of shaft axis is gradually reduced to junction point P from the one end away from junction point P, and the 4th section of a4 of the first molded line and the 5th section of a5 of the first molded line is to the rotation axiss of cam Distance be gradually increased from the 6th section of one end that a6 is connected of the 5th section of a5 of junction point P to first molded line and the first molded line.
The molded line of this cam is simple, and the secondary opening of achievable valve 11 and valve duration are variable.
A kind of according to embodiments of the present invention cam is briefly described below, this cam is the second cam 421 shown in Figure 27, the molded line of this cam is second shown in Figure 27 Cam profile, the molded line of this cam include along cam circumference successively end to end cornerite be 75 ° the second molded line first paragraph b1, cornerite be 60 ° of the second molded line The 4th section of b4 of the second molded line that the 3rd section of b3 of the second molded line that two-stage nitration b2, cornerite are 60 °, cornerite are 30 °, cornerite are 30 ° the second molded line the 5th section of b5, cornerite The 6th section of b6 of the second molded line for 30 ° and the 7th section of b7 of the second molded line that cornerite is 75 °, the 3rd section of b3 of the second molded line and the 4th section of b4 of the second molded line are respectively positioned on cam Rotation axiss be the center of circle the 3rd basic circle R3 on, the second molded line first paragraph b1 and the 7th section of b7 of the second molded line is respectively positioned on the 4th base with the rotation axiss of cam as the center of circle On circle R4, the distance of the second molded line second segment b2 to the rotation axiss of cam is from the one end being connected with the second molded line first paragraph b1 to being connected with the 3rd section of b3 of the second molded line The other end is gradually increased, and the 5th section of b5 of the second molded line and the 6th section of b6 of the second molded line to the rotation axiss of cam distance from the 5th section of the second molded line b5's and Second-Type One end that the 4th section of b4 of line is connected is gradually reduced to the 7th section of one end that b7 is connected of the 6th section of b6 of the second molded line and the second molded line.
The molded line of this cam is simple, and the secondary opening of achievable valve 11 and valve duration are variable.
With reference to Figure 29 and Figure 30, a kind of variable cam profile of achievable valve duration phase is described.
So that the first camshaft 41 and the second camshaft 42 are located at same level and the first camshaft 41 and the second camshaft 42 constant speed adverse movement as a example, as Figure 29 institute Show, the first cam 411 has the first cam profile, the first cam profile include along the first cam 411 circumference successively end to end first molded line first paragraph a1, first Molded line second segment a2, the 3rd section of a3 of the first molded line, the 4th section of a4 of the first molded line and the 5th section of a5 of the first molded line.
Second cam 421 has the second cam profile, the second cam profile include along the second cam 421 circumference successively end to end second molded line first paragraph b1, second Molded line second segment b2, the 3rd section of b3 of the second molded line, the 4th section of b4 of the second molded line and the 5th section of b5 of the second molded line.
When the first roller 31 against the first molded line first paragraph a1 and the second roller 32 against the second molded line first paragraph b1 when, valve 11 is in the first closed mode, i.e. gas Door 11 completely closes.
When the first roller 31 against the first molded line second segment a2 and the second roller 32 against the second molded line second segment b2 when, valve 11 is in open stage, i.e. valve 11 Move to maximum lift position from zero lift position.
When the first roller 31 against the 3rd section of a3 of the first molded line and the second roller 32 against the 3rd section of b3 of the second molded line when, valve 11 is in dwell period, i.e. valve 11 Move to zero lift position from maximum lift position.
When the first roller 31 against the 4th section of a4 of the first molded line and the second roller 32 against the 4th section of b4 of the second molded line when, valve 11 is in the second closed mode, i.e. gas Door 11 completely closes.
When the first roller 31 against the 5th section of a5 of the first molded line and the second roller 32 against the 5th section of b5 of the second molded line when, valve 11 is in the 3rd closed mode, i.e. gas Door 11 completely closes.
It is understood that when valve 11 is in the first closed mode, the second closed mode and three closed modes, valve 11 is in completely closing the stage, but with The corresponding cam profile of above-mentioned three kinds of closed modes differs.
Due to the first cam 411 and the second cam 421 constant speed adverse movement, the first cam 411 rotates from starting point (as Figure 29 around the rotation axiss of the first cam 411 A point on first cam 411, the i.e. starting point of the first molded line first paragraph a1) rotate in an anti-clockwise direction one week when, the second cam 421 is around the rotary shaft of the second cam 421 Line rotates backward one week that is to say, that determining A point clockwise from starting point (the B point on as the second cam 421 Figure 29, the i.e. starting point of the second molded line first paragraph b1) Justice is 0 ° of cam angle moment of the first cam 411, B point is defined as 0 ° of cam angle moment of the second cam 421.
The valve mechanism 1 of the valve actuating mechanism 1000 of the present invention is driven commonly through swing arm unit 2 by the first camshaft 41 and the second camshaft 42, above-mentioned with the present invention As a example cam profile is applied to four-stroke engine, the first camshaft 41 and the second camshaft 42 constant speed rotate backward, and the first camshaft 41 and the second camshaft 42 Rotating speed is 1 with the rotating ratio of the bent axle of electromotor:2, the cam angle moment that cam is gone to 180 ° from 0 ° of cam angle moment is the exhaust top dead center moment, according to four punchings The operation principle of journey electromotor, then be expansion stroke in the range of 0 ° to 90 ° of cam angle, 90 ° to 180 ° of cam angle is exhaust stroke, 180 ° to 270 ° Cam angle is induction stroke, and 270 ° to 360 ° of cam angle for compression stroke it is contemplated that engine with supercharger, in embodiments of the invention, rush by exhaust stroke and air inlet Journey accounts for 120 ° of cam angle.
In order to ensure to need on the accuracy of the timing of valve actuating mechanism 1000, the first cam 411 and the second cam 421 to arrange initial marker locations, such as in the present invention Some specific embodiments in, as shown in Figure 13 and Figure 29, the initial marker locations (corresponding with A point) of corresponding first cam 411 of a cylinder of electromotor are in one The first quartile of individual cartesian coordinate system, and the line of rotation axiss of this initial marker locations and the first cam 411 is 54 ° with horizontal angle, the first of remaining cylinder Cam 411, based on a cylinder, according to the steering of the first camshaft 41, is fitted on the first camshaft 41 by firing interval；Corresponding second cam of one cylinder of electromotor 421 initial marker locations (corresponding with B point) are in the second quadrant of a cartesian coordinate system, and the rotation axiss of this initial marker locations and the second cam 421 Line and horizontal angle are 108 °, and the first cam 411 of remaining cylinder, based on a cylinder, according to the steering of the first camshaft 41, is fitted in first by firing interval On camshaft 41.
As shown in figure 29, the first molded line first paragraph a1 and the first molded line second segment a2 is located at central axis (the i.e. rotary shaft of the first cam 411 of the first camshaft 41 Line) on the first basic circle R1 in the center of circle.
As shown in figure 29, the 4th section of a4 of the first molded line is located on the second basic circle R2 with the central axis of the first camshaft 41 as the center of circle, and the radius of the first basic circle R1 is big In the radius of the second basic circle R2,
As shown in figure 29, the distance of the central axis of the 3rd section of a3 to first camshaft 41 of the first molded line from the one end being connected with the first molded line second segment a2 to the first type The other end that the 4th section of a4 of line is connected is gradually reduced, that is, when the first cam 411 rotate counterclockwise, the point of contact of the 3rd section of a3 of the first molded line and the first roller 31 to first The distance of the central axis of camshaft 41 is gradually reduced.
The distance of the central axis of the 5th section of a5 to first camshaft 41 of the first molded line from the 4th section of one end that a4 is connected of the first molded line to the first molded line first paragraph a1 phase The other end even is gradually increased, when the first cam 411 rotate counterclockwise, the center at the point of contact of the 5th section of a5 of the first molded line and the first roller 31 to the first camshaft 41 The distance of axis is gradually increased.
As shown in figure 29, the 3rd section of b3 of the second molded line and the 4th section of b4 of the second molded line is respectively positioned on (the i.e. rotation of the second cam 421 of the central axis of the second camshaft 42 Axis) for, on the 3rd basic circle R3 in the center of circle, the 3rd basic circle R3 is identical with the radius of the first basic circle R1.
Second molded line first paragraph b1 is located on the 4th basic circle R4 with the central axis of the second camshaft 42 as the center of circle, the radius phase of the 4th basic circle R4 and the second basic circle R2 With that is, the radius of the 3rd basic circle R3 is more than the radius of the 4th basic circle R4.
As shown in figure 29, the distance of the central axis of the second molded line second segment b2 to second camshaft 42 from the one end being connected with the second molded line first paragraph b1 to Second-Type The other end that the 3rd section of b3 of line is connected is gradually increased, that is, when the second cam 421 rotates clockwise, the point of contact of the second molded line second segment b2 and the second roller 32 to second The distance of the central axis of camshaft 42 is gradually increased.
The distance of the central axis of the 5th section of b5 to second camshaft 42 of the second molded line from the 4th section of one end that b4 is connected of the second molded line to the second molded line first paragraph b1 phase The other end even is gradually reduced, and that is, when the second cam 421 turns clockwise, the point of contact of the 5th section of b5 of the second molded line and the second roller 32 is in the second camshaft 42 The distance of heart axis is gradually reduced.
For to sum up, the first molded line first paragraph a1 and the first molded line second segment a2 is located at the big basic circle constituting the first cam 411 on the first basic circle R1, the first molded line the 4th Section a4 is located at the little basic circle constituting the first cam 411 on the second basic circle R2, and the 3rd section of a3 of the first molded line and the 5th section of a5 of the first molded line all constitutes the mistake of the first cam 411 In section section, and the mistake section section of the first cam 411, the distance of the central axis to the first cam 411 for any point is all between the radius and first of the big basic circle of the first cam 411 Between the radius of little basic circle of cam 411.
The 3rd section of b3 of second molded line and the 4th section of b4 of the second molded line is located on the 3rd basic circle R3 and constitutes the big basic circle of the second cam 421, and the second molded line first paragraph b1 is located at the The little basic circle of the first cam 411 is constituted on four basic circle R4, the second molded line second segment b2 and the 5th section of b5 of the second molded line constitutes the mistake section section of the second cam 421, and second In the mistake section section of cam 421, the distance of the central axis to the second cam 421 for any point is all little between the radius of the big basic circle of the second cam 421 and the second cam 421 Between the radius of basic circle.
In a specific embodiment, as shown in figure 29, valve 11 be in successively the first closed mode, open stage, dwell period, the second closed mode, the 3rd During closed mode, the first cam 411 and the second cam 421 all turn over 165 °, 60 °, 60 °, 15 °, 60 ° successively.
It is, of course, understood that in the design process of cam profile, when valve 11 is in different conditions, the angle (i.e. cornerite) that cam turns over around corresponding rotation axiss It is not fixing, can adjust accordingly according to actual needs.
Below so that valve 11 is as inlet valve as a example, when being briefly described using cam profile shown in Figure 29, the engagement process of the first cam 411 and the second cam 421：
In the range of 0 ° to 165 ° cam angle, inlet valve is in the first closed mode, and the big basic circle of the first cam 411 and the first roller 31 are against the second cam 421 Little basic circle and the second roller 32 against；
In the range of 165 ° to 225 ° cam angles, inlet valve is in open stage, and the big basic circle of the first cam 411 and the first roller 31 are against the second cam 421 With the second roller 32 against position transit to the big basic circle of the second cam 421 from the little basic circle of the second cam 421；
In the range of 225 ° to 285 ° cam angles, inlet valve is in dwell period, the first cam 411 and the first roller 31 against position from the first cam 411 Big basic circle transits to the little basic circle of the first cam 411, the big basic circle of the second cam 421 and the second roller 32 against；
In the range of 285 ° to 300 ° cam angles, inlet valve is in the second closed mode, and the little basic circle of the first cam 411 and the first roller 31 are against the second cam 421 big basic circle and the second roller 32 against；
In the range of 300 ° to 360 ° cam angles, inlet valve is in the 3rd closed mode, the first cam 411 and the first roller 31 against position from the first cam 411 Little basic circle transit to the big basic circle of the first cam 411, the second cam 421 and the second roller 32 against to transit to second from the big basic circle of the second cam 421 convex for position The little basic circle of wheel 421.
For to sum up, after the first cam 411 starts to turn over 165 ° of cam angles from 0 °, the changeover portion of the second roller 32 beginning and the second cam 421 is against accordingly First roller 31 still with the big basic circle of the first cam 411 against valve 11 starts to open and enter open stage, and valve 11 accounts for 120 ° from start-up time to close moment Cam angle, taking four-stroke engine as a example, exhaust stroke and induction stroke account for 120 ° of cam angle.Subsequently valve 11 enters the second closed mode, the first roller 31 and first cam 411 little basic circle against, in this state the corresponding cam angle of little basic circle of the first cam 411 be 15 °, the second roller 32 still with the second cam 421 Big basic circle against, and in this state the second cam 421 the corresponding cam angle of big basic circle be 15 °.Hereafter, the first roller 31 and the first cam 411 against position Put the big basic circle transitting to the first cam 411 from the little basic circle of the first cam 411, in this state, the corresponding cam angle of the first cam profile is 60 °, the second roller 32 Transit to the little basic circle of the second cam 421 with the rest position of the second cam 421 from the big basic circle of the second cam 421, in this state, the corresponding cam angle of the second molded line is 60 °, under this state, the first segmental arc c1 of the second swing arm 22 is contacted (tangent) with valve rocker roller 611, and valve 11 is in the 3rd closed mode, until one New circulation.
Valve lift curve Changing Pattern as shown in figure 30, when entering a new circulation, adjusts the phase place of the second camshaft 42, example clockwise by phaser 91 As the clockwise phase place adjusting the first camshaft 41, make 5 ° of the delayed phase of the first camshaft 41, after valve 11 fully opens, have 5 ° of unlatching durations, adjust the The phase place of one camshaft 41, the phase adjusted design load of the first camshaft 41 is 15 ° of cam angles, the scope that is, phase place of the second cam 421 can be delayed more than etc. In 0 ° of cam angle and less than or equal in the range of 15 ° of cam angles, such as 5 °, 10 ° or 15 °.
In short, valve actuating mechanism 1000 according to embodiments of the present invention, using above-mentioned cam profile, and adjust the first camshaft 41 and the by adjusting phase adjusted structure The relative phase of two camshafts 42, the achievable valve duration phase is variable.When this valve actuating mechanism 1000 is applied to air inlet side, when that is, valve 11 is inlet valve, real The existing inlet valve duration is variable, high speed load operating mode in starting, and improves charging efficiency, significantly improves air inflow it is ensured that reducing oil consumption, fall while high-power output Low NOx, HC discharge, improves the combination property in middle high speed load scope for the electromotor.
A kind of according to embodiments of the present invention cam is briefly described below, this cam is the first cam 411 shown in Figure 29, the molded line of this cam is first shown in Figure 29 Cam profile, the molded line of this cam include along cam circumference successively end to end cornerite be 165 ° the first molded line first paragraph a1, cornerite be 60 ° of the first molded line The 4th section of a4 of the first molded line and the 5th section of a5 of the first molded line that cornerite is 60 ° that the 3rd section of a3 of the first molded line that two-stage nitration a2, cornerite are 60 °, cornerite are 15 °, first Molded line first paragraph a1 and the first molded line second segment a2 is located on the first basic circle R1 with the rotation axiss of cam as the center of circle, and the 4th section of a4 of the first molded line is located at the rotation of cam Shaft axis are on the second basic circle R2 in the center of circle, and the radius of the first basic circle R1 is more than the radius of the second basic circle R2, the 3rd section of a3 of the first molded line to the rotation axiss of cam away from It is gradually reduced to the 4th section of other end that a4 is connected of the first molded line from from the one end being connected with the first molded line second segment a2, and the 5th section of a5 of the first molded line is to the rotation of cam The distance of shaft axis is from being gradually increased to the other end being connected with the first molded line first paragraph a1 with the 4th section of one end that a4 is connected of the first molded line.
The molded line of this cam is simple, and the unlatching duration of achievable valve 11 is variable.
A kind of according to embodiments of the present invention cam is briefly described below, this cam is the second cam 421 shown in Figure 29, the molded line of this cam is second shown in Figure 29 Cam profile, the molded line of cam include along cam circumference successively end to end cornerite be 165 ° the second molded line first paragraph b1, cornerite be 60 ° of the second molded line second The 4th section of b4 of the second molded line that the 3rd section of b3 of the second molded line that section b2, cornerite are 60 °, cornerite are 15 °, cornerite are 60 ° the 5th section of b5 of the second molded line, Second-Type The 3rd section of b3 of line and the 4th section of b4 of the second molded line is respectively positioned on the 3rd basic circle R3 with the rotation axiss of cam as the center of circle, and the second molded line first paragraph b1 is located at the rotation of cam Shaft axis are on the 4th basic circle R4 in the center of circle, and the distance of the second molded line second segment b2 to the rotation axiss of cam is from the one end being connected with the second molded line first paragraph b1 to the The other end that the 3rd section of b3 of two molded line is connected is gradually increased, and the 5th section of b5 of the second molded line to the rotation axiss of cam distance from being connected with the 4th section of b4 of the second molded line One end is gradually reduced to the other end being connected with the second molded line first paragraph b1.
The molded line of this cam is simple, and the unlatching duration of achievable valve 11 is variable.
With reference to Figure 31 and Figure 32, a kind of cam profile of achievable variable valve lift is described.
So that the first camshaft 41 and the second camshaft 42 are located at same level and the first camshaft 41 and the second camshaft 42 constant speed adverse movement as a example, as Figure 31 institute Show, the first cam 411 has the first cam profile, the first cam profile include along the first cam 411 circumference successively end to end first molded line first paragraph a1, first Molded line second segment a2, the 3rd section of a3 of the first molded line and the 4th section of a4 of the first molded line.
Second cam 421 has the second cam profile, the second cam profile include along the second cam 421 circumference successively end to end second molded line first paragraph b1, second Molded line second segment b2, the 3rd section of b3 of the second molded line and the 4th section of b4 of the second molded line.
When the first roller 31 against the first molded line first paragraph a1 and the second roller 32 against the second molded line first paragraph b1 when, valve 11 is in the first closed mode, i.e. gas Door 11 completely closes.
When the first roller 31 against the first molded line second segment a2 and the second roller 32 against the second molded line second segment b2 when, valve 11 is in open stage, i.e. valve 11 Move to maximum lift position from zero lift position.
When the first roller 31 against the 3rd section of a3 of the first molded line and the second roller against 32 second the 3rd section of b3 of molded line when, valve 11 is in dwell period, i.e. valve 11 Move to zero lift position from maximum lift position.
When the first roller 31 against the 4th section of a4 of the first molded line and the second roller 32 against the 4th section of b4 of the second molded line when, valve 11 is in secondary opening stage, valve 11 are in the second closed mode, and that is, valve 11 completely closes.
It is understood that when valve 11 is in the first closed mode and the second closed mode, valve 11 is in completely closing the stage, but close shapes with above-mentioned three kinds The corresponding cam profile of state differs.
Due to the first cam 411 and the second cam 421 constant speed adverse movement, the first cam 411 rotates from starting point (as Figure 31 around the rotation axiss of the first cam 411 The first cam 411 on A point, i.e. the starting point of the first molded line first paragraph a1) rotate in an anti-clockwise direction one week when, the second cam 421 is around the rotation of the second cam 421 Axis rotates backward one week that is to say, that by A from starting point (the B point on the second cam 421 as Figure 31, the i.e. starting point of the second molded line first paragraph b1) clockwise Point is defined as 0 ° of cam angle moment of the first cam 411, B point is defined as 0 ° of cam angle moment of the second cam 421.
The valve mechanism 1 of the valve actuating mechanism 1000 of the present invention is driven commonly through swing arm unit 2 by the first camshaft 41 and the second camshaft 42, above-mentioned with the present invention As a example cam profile is applied to four-stroke engine, the first camshaft 41 and the second camshaft 42 constant speed rotate backward, and the first camshaft 41 and the second camshaft 42 Rotating speed is 1 with the rotating ratio of the bent axle of electromotor:2, in this embodiment, exhaust stroke and induction stroke account for 140 ° of cam angle.
In order to ensure to need on the accuracy of the timing of valve actuating mechanism 1000, the first cam 411 and the second cam 421 to arrange initial marker locations, such as in the present invention Some specific embodiments in, as shown in Figure 13 and Figure 31, the initial marker locations (corresponding with A point) of corresponding first cam 411 of a cylinder of electromotor are in one The first quartile of individual cartesian coordinate system, and the line of rotation axiss of this initial marker locations and the first cam 411 is 54 ° with horizontal angle, the first of remaining cylinder Cam 411, based on a cylinder, according to the steering of the first camshaft 41, is fitted on the first camshaft 41 by firing interval；Corresponding second cam of one cylinder of electromotor 421 initial marker locations (corresponding with B point) are in the second quadrant of a cartesian coordinate system, and the rotation axiss of this initial marker locations and the second cam 421 Line and horizontal angle are 108 °, and the first cam 411 of remaining cylinder, based on a cylinder, according to the steering of the first camshaft 41, is fitted in first by firing interval On camshaft 41.
As shown in figure 31, the first molded line first paragraph a1 and the first molded line second segment a2 is located at central axis (the i.e. rotary shaft of the first cam 411 of the first camshaft 41 Line) on the first basic circle R1 in the center of circle.
The junction point P of the 3rd section of a3 of the first molded line and the 4th section of a4 of the first molded line is located on the second basic circle R2 with the central axis of the first camshaft 41 as the center of circle, and first The radius of basic circle R1 is more than the radius of the second basic circle R2.
The distance of the central axis of the 3rd section of a3 to first camshaft 41 of the first molded line is gradually reduced to junction point P from the one end being connected with the first molded line second segment a2, that is, When the first cam 411 rotate counterclockwise, the distance of the point of contact of the 3rd section of a3 of the first molded line and the first roller 31 central axis to the first camshaft 41 is gradually reduced.
The distance of the central axis of the 4th section of a4 to first camshaft 41 of the first molded line is gradually increased to the one end being connected with the first molded line first paragraph a1 from junction point P, that is, When the first cam 411 rotate counterclockwise, the distance of the point of contact of the 4th section of a4 of the first molded line and the first roller 31 central axis to the first camshaft 41 is gradually increased.
As shown in figure 31, the 3rd section of b3 of the second molded line is located at the 3rd base with the central axis (i.e. the rotation axiss of the second cam 421) of the second camshaft 42 as the center of circle On circle R3, the 3rd basic circle R3 is identical with the radius of the first basic circle R1.
Second molded line first paragraph b1 is located on the 4th basic circle R4 with the central axis of the second camshaft 42 as the center of circle, the radius phase of the 4th basic circle R4 and the second basic circle R2 With that is, the radius of the 3rd basic circle R3 is more than the radius of the 4th basic circle R4.
As shown in figure 31, the distance of the central axis of the second molded line second segment b2 to second camshaft 42 from the one end being connected with the second molded line first paragraph b1 to Second-Type The other end that the 3rd section of b3 of line is connected is gradually increased, that is, when the second cam 421 rotates clockwise, the point of contact of the second molded line second segment b2 and the second roller 32 to second The distance of the central axis of camshaft 42 is gradually increased.
The distance of the central axis of the 4th section of b4 to second camshaft 42 of the second molded line from the 3rd section of one end that b3 is connected of the second molded line to the second molded line first paragraph b1 phase The other end even is gradually reduced, and that is, when the second cam 421 turns clockwise, the point of contact of the 4th section of b4 of the second molded line and the second roller 32 is in the second camshaft 42 The distance of heart axis is gradually reduced.
For to sum up, the first molded line first paragraph a1 and the first molded line second segment a2 is located at the big basic circle constituting the first cam 411 on the first basic circle R1, the first molded line the 3rd The junction point P of section a3 and the 4th section of a4 of the first molded line is located on the second basic circle R2 and constitutes the little basic circle of the first cam 411, the 3rd section of a3 of the first molded line and the first molded line the Four sections of a4 all constitute the mistake section section of the first cam 411, and in the mistake section section of the first cam 411 central axis to the first cam 411 for any point distance all between Between the radius of little basic circle of the radius of big basic circle of one cam 411 and the first cam 411.
The 3rd section of b3 of second molded line is located at the big basic circle constituting the second cam 421 on the 3rd basic circle R3, and the second molded line first paragraph b1 is located on the 4th basic circle R4 and constitutes second The little basic circle of cam 421, the second molded line second segment b2, the 4th section of b4 of the second molded line all constitute the mistake section section of the second cam 421, and in the mistake section section of the second cam 421 The distance of the central axis to the second cam 421 for any point is all between the radius of the radius of the big basic circle of the second cam 421 and the little basic circle of the second cam 421.
In a specific embodiment, when valve 11 is in the first closed mode, open stage, dwell period, the second closed mode successively, the first cam 411 He Second cam 421 all turns over 165 °, 60 °, 60 °, 75 ° successively.
It is, of course, understood that in the design process of cam profile, when valve 11 is in different conditions, the angle (i.e. cornerite) that cam turns over around corresponding rotation axiss It is not fixing, can adjust accordingly according to actual needs.
Below so that valve 11 is as inlet valve as a example, when being briefly described using cam profile shown in Figure 31, the engagement process of the first cam 411 and the second cam 421：
In the range of 0 ° to 165 ° cam angle, inlet valve is in the first closed mode, and the big basic circle of the first cam 411 and the first roller 31 are against the second cam 421 Little basic circle and the second roller 32 against；
In the range of 165 ° to 225 ° cam angles, inlet valve is in open stage, and the big basic circle of the first cam 411 and the first roller 31 are against the second cam 421 With the second roller 32 against position transit to the big basic circle of the second cam 421 from the little basic circle of the second cam 421；
In the range of 225 ° to 285 ° cam angles, inlet valve is in dwell period, the first cam 411 and the first roller 31 against position from the first cam 411 Big basic circle transits to the little basic circle of the first cam 411, the big basic circle of the second cam 421 and the second roller 32 against；
In the range of 285 ° to 360 ° cam angles, inlet valve is in the second closed mode, the first cam 411 and the first roller 31 against position from the first cam 411 Little basic circle transit to the big basic circle of the first cam 411, the second cam 421 and the second roller 32 against to transit to second from the big basic circle of the second cam 421 convex for position The little basic circle of wheel 421.
For to sum up, after the first cam 411 starts to turn over 165 ° from 0 °, the changeover portion of the second roller 32 beginning and the second cam 421 is against accordingly the first roller 31 still with the big basic circle of the first cam 411 against valve 11 starts to open and enter open stage, and the cam that valve 11 accounts for 140 ° from start-up time to close moment turns Angle, taking four-stroke engine as a example, exhaust stroke and induction stroke account for 140 ° of cam angle.Subsequently valve 11 enters the second closed mode, the first cam 411 and the The rest position of one cam 411 transits to the big basic circle of the first cam 411, the rest position of the second roller 32 and the second cam 421 from the little basic circle of the first cam 411 Transit to the little basic circle of the second cam 421, this process from the big basic circle of the second cam 421, the first segmental arc c1 of the second swing arm 22 is contacted with valve rocker roller 611 (tangent), valve 11 is closed, until a new circulation.
Valve lift curve Changing Pattern as shown in figure 32, when entering a new circulation, adjusts the phase place of the second camshaft 42, example clockwise by phaser 91 As the counterclockwise phase place adjusting the first camshaft 41, make 5 ° in advance of the phase place of the first camshaft 41, the big basic circle of the first roller 31 and the first cam 411 is against opening after complete Begin with the changeover portion of the first cam 411 against when, the second roller 32 still with the changeover portion of the second cam 421 against, valve opening lift range value will less than maximum lift value, In the range of 15 ° of cam angles, the first cam 411 phase place is more in advance, and valve stroke change is bigger.Adjust the phase place of the first camshaft 41, the first camshaft 41 Phase adjusted design load is 15 ° of cam angles, and the scope that is, phase place of the first cam 411 can shift to an earlier date turns more than or equal to 0 ° of cam angle and less than or equal to 15 ° of cams In the range of angle, such as 5 °, 10 ° or 15 °.
In short, valve actuating mechanism 1000 according to embodiments of the present invention, using above-mentioned cam profile, and adjust the first camshaft 41 and the by adjusting phase adjusted structure The relative phase of two camshafts 42, achievable variable valve lift, can mate suitable valve stroke in electromotor under different operating modes.Electromotor is in low speed Smaller load Using less lift, strengthen intake vortex strength, improve in-cylinder combustion speed, improve cold start-up, the big load of high rotating speed uses big lift, reduces pumping loss, carries High partial load fuel economy, minor betterment electromotor is in the combination property of middle and slow speed of revolution load range.
A kind of according to embodiments of the present invention cam is briefly described below, this cam is the first cam 411 shown in Figure 31, the molded line of this cam is first shown in Figure 31 Cam profile, the molded line of cam include along cam circumference successively end to end cornerite be 165 ° the first molded line first paragraph a1, cornerite be 60 ° of the first molded line second Section a2, cornerite are 60 ° the 3rd section of a3 of the first molded line and the 4th section of a4 of the first molded line, the first molded line first paragraph a1 and the first molded line second segment a2 that cornerite is 75 ° It is located on the first basic circle R1 with the rotation axiss of cam as the center of circle, the junction point P of the 3rd section of a3 of the first molded line and the 4th section of a4 of the first molded line is located at the rotation of cam Axis is on the second basic circle R2 in the center of circle, and the radius of the first basic circle R1 is more than the radius of the second basic circle R2, the distance of the 3rd section of a3 of the first molded line to the rotation axiss of cam Be gradually reduced to junction point P from the one end being connected with the first molded line second segment a2, and the 4th section of a4 of the first molded line to the rotation axiss of cam apart from junction point P to One end that one molded line first paragraph a1 is connected is gradually increased.
The molded line of this cam is simple, achievable variable valve lift.
A kind of according to embodiments of the present invention cam is briefly described below, this cam is the second cam 421 shown in Figure 31, the molded line of this cam is second shown in Figure 31 Cam profile, the molded line of this cam include along cam circumference successively end to end cornerite be 165 ° the second molded line first paragraph b1, cornerite be 60 ° of the second molded line Two-stage nitration b2, cornerite are 60 ° the 3rd section of b3 of the second molded line and the 4th section of b4 of the second molded line that cornerite is 75 °, and the 3rd section of b3 of the second molded line is located at the rotary shaft of cam Line is that on the 3rd basic circle R3 in the center of circle, the 3rd basic circle R3 is identical with the radius of the first basic circle R1, and the second molded line first paragraph b1 is located at the rotation axiss of cam as the center of circle On 4th basic circle R4, the 4th basic circle R4 is identical with the radius of the second basic circle R2, the distance of the second molded line second segment b2 to the rotation axiss of cam from the second molded line first One end that section b1 is connected is gradually increased to the 3rd section of other end that b3 is connected of the second molded line, and the 4th section of b4 of the second molded line to the rotation axiss of cam distance from the One end that the 3rd section of b3 of two molded line is connected is gradually reduced to the other end being connected with the second molded line first paragraph b1.
The molded line of this cam is simple, achievable variable valve lift.
It is understood that as shown in figure 1, above-mentioned valve actuating mechanism 1000 can as needed, a valve 11 corresponds to first swing arm 21.The steering of above-mentioned camshaft And phaser 91 be arranged as one kind preferably example, can adjust it is ensured that two camshaft constant speed rotate backward accordingly, such as the first camshaft 41 can be clockwise Turn, the second camshaft 42 can turn counterclockwise.The cornerite arrangement of above-mentioned cam and size distribution, according to the steering of camshaft and can be actually needed the corresponding adjustment of work.
For to sum up, valve actuating mechanism 1000 according to embodiments of the present invention, can be constant with other mechanisms, only pass through to change the cam of different molded line, realize valve actuating mechanism 1000 Difference in functionality, such as secondary opening of air valve, the valve duration phase is variable and variable valve lift, thus lifting the performance of electromotor according to actual needs, and structure is simple, Air inlet side, exhaust side all can be applied.Therefore, valve actuating mechanism 1000 according to embodiments of the present invention, versatility is good and transplantability is good, and structure is simple, vdiverse in function.
According to embodiments of the present invention vehicle is briefly described below.
Vehicle according to embodiments of the present invention includes the valve actuating mechanism 1000 for electromotor according to described in the above embodiment of the present invention.Thus, according to embodiments of the present invention Power performance good, noxious gas emission is few, energy-conserving and environment-protective.
It should be appreciated that other composition such as electromotor, variator, differential mechanism, brakes etc. of vehicle according to embodiments of the present invention have been all prior art and have been Known to those of ordinary skill in the art, therefore no longer describe in detail one by one here.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any modifications within the spirit and principles in the present invention, made, etc. With replacing, improving etc., should be included within the scope of the present invention.

Claims (10)

1. a kind of valve actuating mechanism (1000) for electromotor is it is characterised in that include：
Valve mechanism (1)；
Swing arm unit (2), the substructure of described swing arm unit (2) has driving face (220), and described driving face (220) is suitable to drive described valve mechanism (1) Valve (11) move along parallel to the direction of valve centrage；
First roller (31) and the second roller (32), described first roller (31) and described second roller (32) are all pivotally arranged on described swing arm unit (2)；
First camshaft (41) and the second camshaft (42), described first camshaft (41) has the first cam (411), and described second camshaft (42) has Two cams (421), described first cam (411) and described second cam (421) constant speed adverse movement,
Described first cam (411) has the first cam profile, and described first cam profile includes the circumference successively end to end first along described first cam (411) Molded line first paragraph (a1) has the second cam profile to the 4th section of the first molded line (a4), described second cam (421), and described second cam profile is included along described second The circumference of cam (421) successively end to end second molded line first paragraph (b1) to the 4th section of the second molded line (b4),
Described first roller (31) against described first molded line first paragraph (a1) and described second roller (32) against described second molded line first paragraph (b1) when, described Valve (11) is in the first closed mode, and against the first molded line second segment (a2) and described second roller (32) is against the second molded line second for described first roller (31) Section (b2) when, described valve (11) is in open stage, described first roller (31) against the 3rd section of the first molded line (a3) and described second roller (32) against During the 3rd section of the second molded line (b3), described valve (11) is in dwell period, described first roller (31) against the 4th section of the first molded line (a4) and described second rolling When sub (32) are against the 4th section of the second molded line (b4), described valve (11) is in the second closed mode；
For adjusting the phase-regulating mechanism of described first camshaft (41) and described second camshaft (42) relative phase.
2. the valve actuating mechanism (1000) for electromotor according to claim 1 is it is characterised in that described first molded line first paragraph (a1) and described first molded line Second segment (a2) is located on the first basic circle (R1) with the central axis of described first camshaft (41) as the center of circle,
The junction point (P) of described the 3rd section of first molded line (a3) and the 4th section of described first molded line (a4) is located at On second basic circle (R2) in the center of circle, the radius of described first basic circle (R1) is more than the radius of described second basic circle (R2),
The distance of the central axis to described first camshaft (41) for described the 3rd section of first molded line (a3) from the one end being connected with described first molded line second segment (a2) to Described junction point (P) is gradually reduced, and the 4th section of described first molded line (a4) arrives the distance of the central axis of described first camshaft (41) from described junction point (P) It is gradually increased to the one end being connected with described first molded line first paragraph (a1).
3. the valve actuating mechanism (1000) for electromotor according to claim 2 is it is characterised in that the 3rd section of described second molded line (b3) is located at described second The central axis of camshaft (42) is that on the 3rd basic circle (R3) in the center of circle, described 3rd basic circle (R3) is identical with the radius of described first basic circle (R1),
Described second molded line first paragraph (b1) is located on the 4th basic circle (R4) with the central axis of described second camshaft (42) as the center of circle, described 4th basic circle (R4) It is identical with the radius of described second basic circle (R2),
The distance of the central axis to described second camshaft (42) for the described second molded line second segment (b2) from the one end being connected with described second molded line first paragraph (b1) to It is gradually increased with described the 3rd section of other end that (b3) is connected of second molded line, and the 4th section of described second molded line (b4) arrives the central axis of described second camshaft (42) Distance from being gradually reduced to the other end being connected with described second molded line first paragraph (b1) with described the 3rd section of one end that (b3) is connected of second molded line.
4. the valve actuating mechanism (1000) for electromotor according to claim 3 it is characterised in that described valve (11) be in successively described first closed mode, When described open stage, described dwell period, described second closed mode, described first cam (411) and described second cam (421) all turn over successively 165 °, 60°、60°、75°.
5. the valve actuating mechanism (1000) for electromotor according to claim 1 is it is characterised in that described swing arm unit (2) includes：
First swing arm (21)；
Second swing arm (22), described second swing arm (22) is pivotably coupled to the bottom of described first swing arm (21), and described second swing arm (22) is around rotation axiss Rotatably, and the substructure of described second swing arm (22) has described driving face (220).
6. the valve actuating mechanism (1000) for electromotor according to claim 5 is it is characterised in that described first swing arm (21) includes：First intermediate link arm Portion (211) and two the first swing arm portions (212), described two first swing arm portions (212) are respectively provided at the two ends in described first intermediate link arm portion (211), described Two the first swing arm portions (212) are oppositely arranged and axially spaced from each other along described first camshaft (41) and described second camshaft (42),
Described first roller (31) is pivotally arranged between described two first swing arm portions (212) by the first sub- bearing pin (51), and described second roller (32) is led to Cross the second sub- bearing pin (52) to be pivotally arranged between described two first swing arm portions (212), described first intermediate link arm portion (211) passes through the second bearing pin (53) Pivotly it is connected with described second swing arm (22), the central axis of described first sub- bearing pin (51), the central axis and described second of described second sub- bearing pin (52) The central axis of bearing pin (53) is located on three seamed edges of a triangular prism.
7. the valve actuating mechanism (1000) for electromotor according to claim 6 is it is characterised in that described second swing arm (22) is suitable to by the 3rd bearing pin (54) It is rotatably arranged on the cylinder cap (2000) of described electromotor, the central axis of described 3rd bearing pin (54) and described rotation axis coincident, described 3rd bearing pin (54) Positioned between described second bearing pin (53) and described driving face (220).
8. the valve actuating mechanism (1000) for electromotor according to claim 7 it is characterised in that described driving face (220) include the first segmental arc (c1), Second segmental arc (c2) and the 3rd segmental arc (c3), described second segmental arc (c2) be connected to described first segmental arc (c1) and described 3rd segmental arc (c3) it Between, and described second segmental arc (c2) is tangent with described first segmental arc (c1) and described 3rd segmental arc (c3) respectively；
The distance of described second segmental arc (c2) and described rotation axiss from the first end being connected with described first segmental arc (c1) to described 3rd segmental arc (c3) phase The second end even increases；
The distance of described 3rd segmental arc (c3) and described rotation axiss from the first end being connected with described second segmental arc (c2) to away from described second segmental arc (c2) Second end increase.
9. a kind of cam it is characterised in that the molded line of the described cam circumference that includes along described cam end to end cornerite is 165 ° of the first molded line first paragraph successively (a1), cornerite be 60 ° the first molded line second segment (a2), cornerite be 60 ° of the 3rd section of the first molded line (a3) and the first the 4th section of molded line (a4) that cornerite is 75 °,
Described first molded line first paragraph (a1) and described first molded line second segment (a2) are located on the first basic circle (R1) with the rotation axiss of described cam as the center of circle,
The junction point (P) of described the 3rd section of first molded line (a3) and the 4th section of described first molded line (a4) is located at the second base with the rotation axiss of described cam as the center of circle On circle (R2), the radius of described first basic circle (R1) is more than the radius of described second basic circle (R2),
Described the 3rd section of first molded line (a3) arrives the distance of the rotation axiss of described cam from one end being connected with described first molded line second segment (a2) to described junction point (P) It is gradually reduced, and the junction point described in the distance of rotation axiss (P) of the 4th section of described first molded line (a4) to described cam arrives and described first molded line first paragraph (a1) Connected one end is gradually increased.
10. a kind of cam it is characterised in that the molded line of the described cam circumference that includes along described cam end to end cornerite is 165 ° of the second molded line first paragraph successively (b1), cornerite be 60 ° the second molded line second segment (b2), cornerite be 60 ° of the 3rd section of the second molded line (b3) and the second the 4th section of molded line (b4) that cornerite is 75 °,
Described the 3rd section of second molded line (b3) is located on the 3rd basic circle (R3) with the rotation axiss of described cam as the center of circle, described 3rd basic circle (R3) and described first The radius of basic circle (R1) is identical,
Described second molded line first paragraph (b1) is located on the 4th basic circle (R4) with the rotation axiss of described cam as the center of circle, described 4th basic circle (R4) and described second The radius of basic circle (R2) is identical,
Described second molded line second segment (b2) arrive described cam rotation axiss distance from the one end being connected with described second molded line first paragraph (b1) to described Second-Type The 3rd section of (b3) connected other end of line is gradually increased, and the 4th section of described second molded line (b4) arrive the distance of the rotation axiss of described cam from described second molded line the Three sections (b3) connected one end is gradually reduced to the other end being connected with described second molded line first paragraph (b1).
CN201510461160.0A 2015-07-31 2015-07-31 Valve timing mechanism for engine and cam of valve timing mechanism Pending CN106401688A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510461160.0A CN106401688A (en) 2015-07-31 2015-07-31 Valve timing mechanism for engine and cam of valve timing mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510461160.0A CN106401688A (en) 2015-07-31 2015-07-31 Valve timing mechanism for engine and cam of valve timing mechanism

Publications (1)

Publication Number Publication Date
CN106401688A true CN106401688A (en) 2017-02-15

Family

ID=58007232

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510461160.0A Pending CN106401688A (en) 2015-07-31 2015-07-31 Valve timing mechanism for engine and cam of valve timing mechanism

Country Status (1)

Country Link
CN (1) CN106401688A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6170449B1 (en) * 1998-09-30 2001-01-09 Yamaha Hatsudoki Kabushiki Kaisha Valve operating system for engine
CN1357079A (en) * 1998-01-19 2002-07-03 达勒脱控股有限公司 Cam and cam followers for engines
US20020152974A1 (en) * 2001-04-20 2002-10-24 Mitsubishi Denki Kabushiki Kaisha Apparatus for adjusting valve lift
CN103758601A (en) * 2013-12-30 2014-04-30 长城汽车股份有限公司 Air distribution mechanism for engine and vehicle comprising same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1357079A (en) * 1998-01-19 2002-07-03 达勒脱控股有限公司 Cam and cam followers for engines
US6170449B1 (en) * 1998-09-30 2001-01-09 Yamaha Hatsudoki Kabushiki Kaisha Valve operating system for engine
US20020152974A1 (en) * 2001-04-20 2002-10-24 Mitsubishi Denki Kabushiki Kaisha Apparatus for adjusting valve lift
CN103758601A (en) * 2013-12-30 2014-04-30 长城汽车股份有限公司 Air distribution mechanism for engine and vehicle comprising same

Similar Documents

Publication Publication Date Title
CN105781652B (en) The variable valve timing system and its control method of valve duration phase continuous variable
JPH02286815A (en) Device and method for driving valve of internal combustion engine
CN110344908A (en) A kind of hydraulic valve mechanism and internal combustion engine for realizing that valve opening number is variable
CN106382137A (en) Valve actuating mechanism for engine and cam of valve actuating mechanism
US20070107681A1 (en) Continuously variable valve lift system for engines
AU2012374402B2 (en) Variable valve device of internal combustion engine
CN103670579B (en) A kind of engine air valve lift continuous setup mechanism
CN201802488U (en) Rotor motor and piston connection rod assembly thereof
JPH1193710A (en) Exhaust valve control device of 2-stroke diesel engine with supercharger
US6568361B2 (en) Valve operating device for internal combustion engines
CN106401688A (en) Valve timing mechanism for engine and cam of valve timing mechanism
JP2017227138A (en) Variable compression ratio machine type atkinson cycle engine
CN107035448A (en) For the valve actuating mechanism of engine and the vehicle with it
CN103790669B (en) For the valve actuating mechanism of engine and the vehicle with it
CN106703921A (en) Air distribution mechanism for engine, and cam thereof
CN205559001U (en) Valve mechanism for motorcycle engine
CN102269050B (en) Rotor engine and rotor part thereof
WO2002081872A1 (en) Variable valve timing system
CN207177989U (en) A kind of swing type variable valve driving apparatus
CN202611784U (en) Continuous variable valve lift system with default mechanism
CN105240083B (en) A kind of two-part lift range variable and secondary opening of air valve mechanism
CN107762587B (en) Actuating mechanism, variable valve lift device, engine and automobile
RU2476691C2 (en) Engine cylinder intake valve controlled drive
CN103758603B (en) Valve mechanism for engine and vehicle with same
CN103758604B (en) Gas distributing mechanism for engine and car with same

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20170215

RJ01 Rejection of invention patent application after publication