CN103711541A - Variable valve of internal combustion engine - Google Patents
Variable valve of internal combustion engine Download PDFInfo
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- CN103711541A CN103711541A CN201310331891.4A CN201310331891A CN103711541A CN 103711541 A CN103711541 A CN 103711541A CN 201310331891 A CN201310331891 A CN 201310331891A CN 103711541 A CN103711541 A CN 103711541A
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Abstract
The invention provides a variable valve of an internal combustion engine, which can inhibit generating noise when connecting or disconnecting multiple swing arms through a solenoid. In a variable valve (26) that connects or disconnects an operation-continuing arm (28) with an intermittent arm (29) by making a connecting pin (45) move back and forth, a first end wall (44) is formed in an intermittent side guide hole (42), which can make the front end contact when a limit pin (46) moves forward in maximum extent. The first end wall comprises an oil supply passage (60) that is set inside an inlet side arm shaft (35); a first oil supply hole (61) in the inner surface of the intermittent side guide hole (42) that is communicated with the oil supply passage (60) and is close to the side opening of the first end wall (44) compared to the front end when the limit pin (46) moves backwards in the maximum extent; and a first oil exhaust hole (62) has an opening on the upper part of the outer surface of the intermittent arm (29) and is in the inner surface of the intermittent side guide hole (42) that is communicated with the oil supply passage (60) and is close to the first end wall (44) compared to the front end when the limit pin (46) moves backwards in the maximum extent.
Description
Technical field
The present invention relates to the variable valve gear of internal-combustion engine.
Background technique
In the past, the variable valve gear of known a kind of internal-combustion engine, by linking a plurality of rocking arms that adjoin each other or removing the aperture that this links to adjust suction valve or outlet valve.
In variable valve gear, on a plurality of rocking arms of adjacency, be respectively arranged with mutually coaxial connected bullport.And, for example by hydraulic pressure, be used in the connection pin that links a plurality of rocking arms and advance and retreat between each bullport, thus a plurality of rocking arms linked or remove its link.
Yet in the compact internal combustion engine that two-wheeled motor vehicle etc. is used, be difficult to guarantee enough hydraulic pressure, cannot be provided for making the hydraulic power of connection pin advance and retreat.Therefore, as substituting of hydraulic power, the power source (for example,, with reference to patent documentation 1) by the final controlling element of solenoid or electric motor etc. as variable valve gear.
Patent documentation 1: TOHKEMY 2012-2095 communique
Summary of the invention
Yet, in the situation that by solenoidal connection, disconnect and to carry out the link of a plurality of rocking arms or to link removing, connection pin or collide consumingly with the stopper pin of this connection pin butt and the end wall in rocking arm, produces bruit de froissement thus.Especially the in the situation that of two-wheeled motor vehicle, because variable valve gear and driver's distance is short, so this bruit de froissement easily enters driver's ear.
The present invention makes in view of above-mentioned problem, and its object is to provide a kind of variable valve gear of internal-combustion engine, can suppress to produce sound when carrying out the link of a plurality of rocking arms by solenoid or linking releasing.
Technological scheme 1 of the present invention, possesses: a plurality of cams (for example, exhaust side cams 32 described later and air inlet side cam 37) that are arranged at camshaft (for example, camshaft 27 described later), a plurality of rocking arms (for example, all the time the rocking arm 28 that turns round described later, intermittently rocking arm 29 and exhaust side rocking arm 30), it (is for example supported on pitman arm shaft with the mode axle that can swing, air inlet side pitman arm shaft 35 described later or exhaust side pitman arm shaft 31), for example, by (swinging to open and close suction valve with described cam butt, suction valve 21 described later) or outlet valve (for example, outlet valve 22 described later), connection pin (for example, connection pin 45 described later), it (is for example contained in running side bullport, running side bullport 41 described later) in, in this running side bullport, sliding contact also can be advanced and retreat, setting is extended in the inside of all the time running rocking arm (for example, described later all the time turn round rocking arm 28) of described running side bullport among described a plurality of rocking arms, stopper pin (for example, stopper pin 46 described later), it (is for example contained in intermittently side bullport, intermittence described later, side bullport 42) in, sliding contact can advancing and retreat in this side bullport at intermittence, side bullport for example, extended and arranged in the inside of the rocking arm at intermittence with the described rocking arm adjacency that turns round all the time (, intermittence described later, rocking arm 29) described intermittence, and was connected coaxially with described running side bullport when described suction valve or described outlet valve close valve, solenoid (for example, solenoid 50 described later), an its contrary side and described rocking arm that turns round all the time in rocking arm side at described intermittence arranges adjacently, make described connection pin and make described stopper pin advance and retreat via this connection pin, described connection pin is advanced and retreat between side bullport at described running side bullport and described intermittence, thus by described turn round all the time rocking arm and described intermittence rocking arm link or remove its link, at this internal-combustion engine (for example, internal-combustion engine 1 described later) variable valve gear (for example, variable valve gear 26 described later) in, it is characterized in that, the contrary side of described connection pin side at side bullport at described intermittence, (be for example formed with the first end wall of its front end butt of confession when described stopper pin at utmost advances, the first end wall 44 described later), described variable valve gear also possesses: oil (is for example supplied with road, oil described later is supplied with road 60), it is arranged at the inside of described pitman arm shaft, for the oil of supplying with by oil pump, circulate, the first oily supply hole (for example, the first oily supply hole 61 described later), it is supplied with road with described oil and is communicated with, and, in the inner face of side bullport at described intermittence, when at utmost retreating, described stopper pin comparing with its front end by described the first end wall side opening, to supplying oil supply in side bullport described intermittence, the first oil discharge hole (for example, the first oil discharge hole 62 described later), it is communicated with comparing with its front end when described stopper pin at utmost retreats by described the first end wall side in the inner face top of side bullport at described intermittence, and, at the outside upper opening of rocking arm at described intermittence, oil was discharged in side bullport from described intermittence.
Technological scheme 2 of the present invention, on the basis of the formation of recording in technological scheme 1, is characterized in that described the first oily supply hole and described the first oil discharge hole are compared and are configured in described connection pin side with described the first end wall.
Technological scheme 4 of the present invention, on the basis of the formation of recording in any one of technological scheme 1～3, it is characterized in that, described intermittence side bullport described the first end wall and the diameter between described the first oily supply hole and described the first oil discharge hole than the hole enlargement of described connection pin side.
Technological scheme 6 of the present invention, on the basis of the formation of recording in any one of technological scheme 1～5, is characterized in that, the entrance part of the described oil pump side in described oil supply road, is provided with aperture (for example, aperture 70 described later).
The effect of invention
According to technological scheme 1 of the present invention, under the state of rocking arm and the intermittently link releasing of rocking arm that turns round all the time, can via oil supply road and the first oily supply hole, oil be supplied to intermittently side bullport from oil pump.Among the oil being supplied to, superfluous amount by the first oil discharge hole from intermittence side bullport be discharged from.That is, intermittently the inside of side bullport is always full of by oil.And, under this state, if thereby the rocking arm that makes to turn round all the time link and drive solenoid that connection pin and stopper pin are advanced with rocking arm intermittently, intermittently the oil in side bullport is extruded forcibly from the first oil discharge hole.Now, buffering (damping force) effect of performance based on oily, thus, the front end that can suppress stopper pin produces sound while colliding with the first end wall.
According to technological scheme 2 of the present invention, thereby if the rocking arm that makes to turn round all the time link and drive solenoid that connection pin and stopper pin are advanced with rocking arm intermittently, the front end of stopper pin, by the opening portion of the first oily supply hole and the opening portion of the first oil discharge hole, clogs these opening portions.Thus, intermittently the oily discharge channel in side bullport diminishes, and before the front end of stopper pin and the first end wall butt, brings into play reliably cushioning effect, the further generation of sound-inhibiting thus.
According to technological scheme 3 of the present invention, thereby if the rocking arm that makes to turn round all the time link and drive solenoid that connection pin and stopper pin are advanced with rocking arm intermittently, the opening portion of the first oil discharge hole is clogged by the front end of stopper pin prior to the opening portion of the first oily supply hole.After the opening portion of the first oil discharge hole is plugged, for the thrust of stopper pin, performance presses by the oily supply of supplying with from the first oily supply hole the larger cushioning effect producing.Therefore, can further suppress the sound that produces when the front end of stopper pin and the collision of the first end wall.
According to technological scheme 4 of the present invention, thereby in the situation that driving solenoid that connection pin and stopper pin are advanced for make to turn round all the time rocking arm and rocking arm intermittently link, the situation that there will not be the oily discharge channel in side bullport intermittently to disappear completely.Therefore, can prevent stopper pin hydraulic locking.
According to technological scheme 5 of the present invention, under the state of rocking arm and intermittently rocking arm link that turns round all the time, oil can be supplied in running side bullport via oil supply road and the second oily supply hole from oil pump.Among the oil being supplied to, superfluous amount is discharged from running side bullport by the second oil discharge hole.That is, the inside of running side bullport is always full of by oil.And, under this state, if thereby remove the rocking arm that turns round all the time and drive solenoid that connection pin and stopper pin are retreated with the link of rocking arm intermittently, the oil in the side that turns round bullport is extruded forcibly from the second oil discharge hole.Now, buffering (damping force) effect of performance based on oily, can also suppress the sound that solenoid produces because of spring reset etc.
According to technological scheme 6 of the present invention, can be supplied to the oily flow that oil is supplied with road by aperture adjustment, therefore can adjust the cushioning effect based on oily.
Accompanying drawing explanation
Fig. 1 is the sectional view of internal-combustion engine that possesses the variable valve gear of the first mode of execution of the present invention.
Fig. 2 is the figure of the formation of the variable valve gear that represents the first mode of execution of the present invention of the A-A line sectional view by Fig. 1, (a) mean the figure of turn round all the time rocking arm and the state that intermittently link of rocking arm is disengaged, (b) mean the figure of turn round all the time rocking arm and the state that intermittently rocking arm links.
Fig. 3 means the figure of formation of the variable valve gear of the second mode of execution of the present invention, (a) mean the figure of turn round all the time rocking arm and the state that intermittently link of rocking arm is disengaged, (b) mean the figure of turn round all the time rocking arm and the state that intermittently rocking arm links.
The explanation of reference character
1 internal-combustion engine
21 suction valves
22 outlet valves
26,80 variable valve gears
27 camshafts
28 rocking arms that turn round all the time
29 rocking arms intermittently
30 exhaust side rocking arms
31 exhaust side pitman arm shafts
32 exhaust side cams
35 air inlet side pitman arm shafts
37 air inlet side cams
41 running side bullports
42 side bullports intermittently
43 second end walls
44 first end walls
45 connection pins
46 stopper pins
50 solenoids
60 oil are supplied with road
61,65 first oily supply holes
62,66 first oil discharge holes
63 second oily supply holes
64 second oil discharge holes
70 apertures
Embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described.
First, the first mode of execution of the present invention is described.Fig. 1 is the sectional view of internal-combustion engine that possesses the variable valve gear of the first mode of execution of the present invention.
As shown in Figure 1, internal-combustion engine 1 possesses cylinder body 11, cylinder head 15, housing 19, variable valve gear 26, air inlet system 18.
The piston 13 that cylinder body 11 possesses cylinder thorax 12 and is embedded in cylinder thorax 12 in the mode that can be free to slide.
The variable valve gear 26 of present embodiment is contained in valve cage 25.26 pairs of suction valves 21 of variable valve gear and outlet valve 22 carry out driven for opening and closing.
The intermediate portion of a pair of exhaust side rocking arm 30 is supported on exhaust side pitman arm shaft 31 with the mode axle that can swing, and this exhaust side pitman arm shaft 31 has the axis parallel with camshaft 27.In addition, exhaust side rocking arm 30 is supported by axle by roller 33 in one end, and this roller 33 contacts and rotates with the exhaust side cams 32 that is arranged at camshaft 27.In addition, in the other end of exhaust side rocking arm 30, also can regulate the tappet screw 34 of advance and retreat position to screw togather with the rod end 22a that is connected to outlet valve 22.
A pair of exhaust side rocking arm 30 is driven in exhaust side cams 32 and swings, thereby opens and closes outlet valve 22.That is, outlet valve 22 carries out on-off action with the corresponding operating state of the cam profile with exhaust side cams 32.
All the time turn round rocking arm 28 and intermittently rocking arm 29 configuration side by side in the direction of the axis along camshaft 27, be supported on air inlet side pitman arm shaft 35 with the mode axle that can swing, and this air inlet side pitman arm shaft 35 has the axis parallel with camshaft 27.
All the time turn round rocking arm 28 and rocking arm 29 intermittently, in an end of these rocking arms, respectively be connected to the rod end 21a of a pair of suction valve 21 and can regulate the tappet screw 36 of advance and retreat position to screw togather.In addition, the other end of the rocking arm 28 that turns round all the time is supported by axle by roller 38, and this roller 38 contacts and rotates with the air inlet side cam 37 that is arranged at camshaft 27.On the other hand, intermittently the other end of rocking arm 29 contacts with not shown sliding contact jut, and this sliding contact jut has the circular periphery corresponding with the basic circle portion of air inlet side cam 37 that is arranged at camshaft 27.
The variable valve gear 26 of present embodiment, above between air inlet side pitman arm shaft 35 and roller 38, has the valve events feature change mechanism 40 of extending along the axis parallel with camshaft 27.
Valve events feature change mechanism 40, rocking arm 28 runnings only make to turn round all the time when the low-speed running of internal-combustion engine 1, when the running up of internal-combustion engine 1, will turn round all the time rocking arm 28 and intermittently rocking arm 29 link, thereby make to turn round all the time rocking arm 28 and intermittently both sides' running of rocking arm 29.
In other words, when the low-speed running of internal-combustion engine 1, the rocking arm 28 that only turns round is all the time driven in air inlet side cam 37 and swings, and the only side in a pair of suction valve 21 carries out on-off action with the corresponding operating state of cam profile with air inlet side cam 37.On the other hand, when the running up of internal-combustion engine 1, turn round all the time rocking arm 28 and intermittently rocking arm 29 be driven in air inlet side cam 37 and swing, the both sides of a pair of suction valve 21 carry out on-off action with the corresponding operating state of cam profile with air inlet side cam 37.
Fig. 2 is the A-A line sectional view of Fig. 1, means the sectional view of the variable valve gear 26 of the first mode of execution of the present invention.In more detail, Fig. 2 (a) is the figure of rocking arm 28 and the state that intermittently link of rocking arm 29 is disengaged of turning round all the time.Fig. 2 (b) is the figure of rocking arm 28 and the state that intermittently rocking arm 29 is bonded of turning round all the time.
All the time turn round rocking arm 28 and rocking arm 29 intermittently in abutting connection with configuration, are supported on air inlet side pitman arm shaft 35 with the mode axle that can swing on the axial direction of air inlet side pitman arm shaft 35.
All the time turn round rocking arm 28 and intermittently rocking arm 29 there is respectively the running side bullport 41 of the drum that diameter is identical and side bullport 42 intermittently, above-mentioned running side bullport 41 and intermittently side bullport 42 have the axis parallel with air inlet side pitman arm shaft 35.
Running side bullport 41 and intermittently side bullport 42 with suction valve 21 close valve time coaxial connected mode arrange.
In the running side bullport 41 of rocking arm 28 sides that turns round all the time, contain connection pin 45.Connection pin 45 is cylindric, can be in the bullport 41 interior sliding contacts of running side advance and retreat.
On the ear end face (faces of solenoid 50 sides) of connection pin 45, be provided with protuberance 45a, this protuberance 45a, along the Axis Extension of air inlet side pitman arm shaft 35, connects the second end wall 43 of running side bullport 41 and gives prominence to outside from the rocking arm 28 that turns round all the time.Protuberance 45a is little with connection pin 45 phase diameter groups, coaxially and integratedly arranges with connection pin 45.
The 52a of plectane portion of drive link 52 forms in the mode contacting with protuberance 45a all the time, and this protuberance 45a together swings with the rocking arm 28 that turns round all the time.
At intermittence in side bullport 42 of rocking arm 29 sides at intermittence, contain the stopper pin 46 that limit mobile terminal that the coupling position of connection pin 45 (position shown in Fig. 2 (b)) is located.Stopper pin 46 also can be advanced and retreat in side bullport 42 interior sliding contacts at intermittence.
Air inlet side pitman arm shaft 35 has in inside for the oil of the oil circulation that never illustrated oil pump is supplied with supplies with road 60.Oil is supplied with road 60 and is configured to and comprises: the supervisor 71 who extends along the axial direction of air inlet side pitman arm shaft 35 at the air inlet side pitman arm shaft 35 center of cylindrical shape; 72,72 and second minutes branch roads 73,73 of first minute branch road from supervisor 71Xiang Vertical direction branch extension.
First minute branch road 72,72 extends to the second oily supply hole 63 that is arranged at the first oily supply hole 61 of rocking arm 29 intermittently and is arranged at the rocking arm 28 that turns round all the time, and be communicated with these first oily supply holes 61 and the second oily supply hole 63 respectively from being responsible for 71.That is, the opening portion of the first oily supply hole 61 and the second oily supply hole 63 and the opening portion of first minute branch road 72,72 are mutually faced and link.
In addition, the opening portion periphery 72a of first minute branch road 72,72,72a chamfering processing, also chamfering processing of opening portion periphery 61a, the 63a in the face of first minute branch road 72,72 of the first oily supply hole 61 and the second oily supply hole 63.Thus, even when thereby roller 38 is by air inlet side cam 37 promote to turn round all the time rocking arm 28 or when intermittently rocking arm 29 swings, owing to turning round all the time the rocking arm 28 and intermittently amplitude of fluctuation of rocking arm 29 is little, therefore can maintain the coupled condition that oil is supplied with road 60 and the first oily supply hole 61 or the second oily supply hole 63.
In addition, as modified embodiment of the present embodiment, can also be at rocking arm 28 and the recess that the ring-type linking with the first oily supply hole 61 and the second oily supply hole 63 is set in interior week of axis hole 28a, the 29a of rocking arm 29 intermittently of turning round all the time, and adopt and make first minute branch road 72,72 in the face of the shape of this recess.In addition, this recess can also be located at all-round but be located in a circumferential part.
Within second minute, branch road 73,73 is communicated with axis hole 28a, 29a, the internal feed oil to axis hole 28a, 29a.
Oil is supplied with road 60 and is possessed aperture 70 at the entrance of upstream side.
Intermittently rocking arm 29 has: supply with road 60 with the oil of the inside of air inlet side pitman arm shaft 35 and is communicated with, and, in side bullport 42 inner face lower openings thus oil is supplied to the first oily supply hole 61 in side bullport 42 at intermittence at intermittence; Be communicated with side bullport at intermittence 42 inner face top, and, at rocking arm 29 outside upper opening at intermittence, first oil discharge hole 62 of oil being discharged from side bullport at intermittence 42 inside.
The first oily supply hole 61 and the first oil discharge hole 62, among intermittence side bullport 42 inner face, when stopper pin 46 at utmost retreats (Fig. 2 (a)) compare with the front end of stopper pin 46 by the first end wall 44 side openings.
The first oily supply hole 61 and the first oil discharge hole 62, with intermittence side bullport the first end wall 44 of 42 compare by connection pin 45 sides, apart from the first end wall 44, separate identical distance and opening respectively.In addition, intermittently the first end wall 44 of side bullport 42 and the diameter of the part 48 between the first oily supply hole 61 and the first oil discharge hole 62 than connection pin 45 side hole enlargements.
All the time the rocking arm 28 that turns round has: supplies with road 60 with the oil of rocking arm 28 inside of turning round all the time and is communicated with, and, in the inner face lower openings of running side bullport 41, thus oil is supplied to the second oily supply hole 63 of the inside of running side bullport 41; Is communicated with the inner face top of running side bullport 41, and, at the outside upper opening of rocking arm 28 that turns round all the time, from the inside of running side bullport 41 by the second oil discharge hole 64 of oil discharge.
The second oily supply hole 63 and the second oil discharge hole 64, when connection pin 45 is when at utmost advancing among side bullport 42 inner face intermittence (Fig. 2 (b)), compare with the rearward end of connection pin 45 by the second end wall 43 side openings.
The second oily supply hole 63 and the second oil discharge hole 64, comparing by stopper pin 46 sides with the second end wall 43 of running side bullport 41, separate identical distance and difference opening apart from the second end wall 43.In addition, the second end wall 43 of running side bullport 41 and the diameter of the part 49 between the second oily supply hole 63 and the second oil discharge hole 64 are than stopper pin 46 side hole enlargements.
Next, with reference to Fig. 2, the action of the variable valve gear 26 of the first mode of execution of the present invention is described.
Under turn round all the time rocking arm 28 and state (Fig. 2 (a)) that intermittently link of rocking arm 29 is disengaged, from oil pump, via oil, supply with road 60 and the first oily supply hole 61, oil is by sustainable supply to side bullport 42 intermittently, and intermittently the inside of side bullport 42 is full of by oil thus.By the oil of surplus supply, from the first oil discharge hole 62, to rocking arm at intermittence 29 outside, be discharged from, by not shown food tray, stockpile.Stockpile in the oil of food tray and drawn by aforesaid oil pump, be again supplied to oil and supply with road 60.
If drive solenoid 50, the pushing force from output shaft 51 acts on protuberance 45a, thus, Yi Bian connection pin 45 is resisted the elastic force of Returnning springs 47 and on one side stopper pin 46 is pushed and moves to coupling position (Fig. 2 (b)).And, the front end of stopper pin 46 and the first end wall 44 butts, the mobile terminal of limiting thus connection pin 45.Now, by stopper pin 46, pushed the oil of the first end wall 44 sides, mainly from the first oil discharge hole 62, to rocking arm at intermittence 29 outside, discharge, but the oil of a part is supplied with the interior adverse current in road 60 at the first oily supply hole 61 and oil.In addition now, due at solenoid 50 and be arranged between the lip part 54 of rear end of output shaft 51 and be provided with gap 53, therefore can avoid the collision of solenoid 50 and lip part 54, avoid the generation of bruit de froissement.
Under the state (Fig. 2 (b)) of rocking arm 28 and intermittently rocking arm 29 links that turns round all the time, from oil pump via oil supply with road 60 and the second oily supply hole 63 by oily sustainable supply to the side bullport 41 that turns round, the inside of the side that turns round thus bullport 41 is full of by oil.By the oil of surplus supply, from the second oil discharge hole 64, to the outside of the rocking arm 28 that turns round all the time, discharged.The oil of discharging from the second oil discharge hole 64, stockpiles in not shown food tray in the same manner with the oil of discharging from the first oil discharge hole 62.
When the driving of stop solenoid 50, while removing the pushing from output shaft 51, due to the restoring force of Returnning spring 47, stopper pin 46 is pushed back, and connection pin 45 is removed position (Fig. 2 (a)) and returned to linking.Now, be bonded the oil that pin 45 pushes the second end wall 43 sides, discharge the main outside from the second oil discharge hole 64 to the rocking arm 28 that turns round all the time, but the oil of a part is supplied with the interior adverse current in road 60 at the second oily supply hole 63 and oil, from the first oily supply hole 61, is supplied to the intermittently inside of side bullport 42.
The variable valve gear 26 of first embodiment of the invention, can obtain following effect.
(1) variable valve gear 26 possesses: be arranged at the inside of air inlet side pitman arm shaft 35, for the oil of the oil circulation of supplying with by oil pump, supply with road 60; Supply with road 60 with oil and is communicated with, and at side bullport 42 inner face opening at intermittence, oil is supplied to the first oily supply hole 61 in side bullport 42 at intermittence; From side bullport at intermittence 42 inner face top, be communicated with, and at rocking arm 29 upper opening at intermittence, by oil from the first oil discharge hole 62 that intermittence, side bullport 42 was discharged.
Thus, under the state (Fig. 2 a)) of rocking arm 28 and the intermittently link releasing of rocking arm 29 that turns round all the time, can via oil supply road 60 and the first oily supply hole 61, oil be supplied to intermittently side bullport 42 from oil pump.Among the oil being supplied to, superfluous amount by the first oil discharge hole 62 from intermittence side bullport 42 oil is discharged.That is, intermittently the inside of side bullport 42 is always full of by oil.And, under this state, if thereby the rocking arm 28 of making to turn round all the time link and drive solenoid 50 that connection pin 45 and stopper pin 46 are advanced with rocking arm 29 intermittently, intermittently the oil in side bullport 42 is extruded forcibly from the first oil discharge hole 62.Now, buffering (damping force) effect of performance based on oily, thus, the front end that can suppress stopper pin 46 produces sound while colliding with the first end wall 44.
(2) first oily supply holes 61 and the first oil discharge hole 62, be configured in the comparing by connection pin 45 sides with the first end wall 44 of side bullport 42 at intermittence of rocking arm 29 intermittently.
Thus, thereby if the rocking arm 28 of making to turn round all the time link and drive solenoid 50 that connection pin 45 and stopper pin 46 are advanced with rocking arm 29 intermittently, the front end of stopper pin 46, by the opening portion of the first oily supply hole 61 and the opening portion of the first oil discharge hole 62, clogs these opening portions.Thus, intermittently the oily discharge channel in side bullport 42 diminishes, and before the front end of stopper pin 46 and the first end wall 44 butts, brings into play reliably cushioning effect, the further generation of sound-inhibiting thus.
(3) intermittently the diameter of the part 48 between the first oily supply hole 61 of inwall of side bullport 42 and the inner of the first oil discharge hole 62 and intermittence side bullport the first end wall 44 of 42 than connection pin 45 side hole enlargements.
Thus, thereby in the situation that driving solenoid 50 that connection pin 45 and stopper pin 46 are advanced for make to turn round all the time rocking arm 28 and rocking arm 29 intermittently link, the situation that there will not be the oily discharge channel in side bullport 42 intermittently to disappear completely.Therefore, can prevent that stopper pin 46 from hydraulic locking occurring.
(4) also possess: supply with oil that road 60 is communicated with and at the inner face opening of running side bullport 41, to the second oily supply holes 63 of running side bullport 41 interior confession oil supply; From the inner face top of running side bullport 41, be communicated with and at the upper opening of rocking arm 28 that turns round all the time, the second oil discharge hole 64 that oil is discharged from running side bullport 41.
Thus, under the state of rocking arm 28 and intermittently rocking arm 29 links that turns round all the time, oil can be supplied in running side bullport 41 via oil supply road 60 and the second oily supply hole 63 from oil pump.Among the oil being supplied to, superfluous amount is discharged from running side bullport 41 by the second oil discharge hole 64.That is, the inside of running side bullport 41 is always full of by oil.And, under this state, if thereby remove the rocking arm 28 that turns round all the time and drive solenoid 50 that connection pin 45 and stopper pin 46 are retreated with the link of rocking arm 29 intermittently, the oil in the side that turns round bullport 41 is extruded forcibly from the second oil discharge hole 64.Now, buffering (damping force) effect of performance based on oily, can also suppress the sound that solenoid 50 produces because of spring reset etc.
(5) entrance on oil supply road 60 is provided with aperture 70.
Thus, can adjust and be supplied to the oily flow that oil is supplied with road 60 by aperture 70, therefore can adjust the cushioning effect based on oily.
Next, with reference to Fig. 3, the second mode of execution of the present invention is described.For the formation identical with above-mentioned the first mode of execution, mark identical reference character, and the description thereof will be omitted.
Fig. 3 means the figure of formation of the variable valve gear 80 of the second mode of execution of the present invention, (a) mean the figure of turn round all the time rocking arm and the state that intermittently link of rocking arm is disengaged, (b) mean the figure of turn round all the time rocking arm and the state that intermittently rocking arm links.
The variable valve gear 80 of the second mode of execution of the present invention is with the difference of the variable valve gear 26 of the first mode of execution of the present invention, and the first oil discharge hole 66 is compared and is disposed at connection pin 45 sides with the first oily supply hole 65.In addition, the central shaft of the first oil discharge hole 66 and the first oily supply hole 65 is consistent.
Action to the variable valve gear 80 of the second mode of execution of the present invention describes.
When driving solenoid 50, while acting on protuberance 45a from the pushing force of output shaft 51 thus, Yi Bian the elastic force of connection pin 45 opposing Returnning springs 47 and on one side stopper pin 46 is pushed and moves to coupling position (Fig. 3 (b)).When this connection pin 45 moves, the first oil discharge hole 66 is clogged by stopper pin 46 prior to the first oily supply hole 65.In addition, if the variable valve gear 26 of the first mode of execution of the present invention, before stopper pin 46 and the first end wall 44 butts, on stopper pin 46, effect has very strong damping force, therefore even if do not separate gap at solenoid 50 with being arranged between the lip part 54 of rear end of output shaft 51, yet can collide and produce sound with output shaft 51 because of solenoid 50 hardly.
In addition, even after the first oil discharge hole 66 is clogged by stopper pin 46, for oil, the oil on the first oily supply hole 65 and oil supply road 60 is pushed and adverse current, from the second oily supply hole 63, be supplied to the inside of running side bullport 41, so can there is not hydraulic locking in stopper pin 46.
The variable valve gear 80 of the second mode of execution of the present invention, above-mentioned effect (1)～(5) of realizing except obtaining the variable valve gear 26 of the first mode of execution of the present invention, can also obtain following effect.
(6) first oil discharge holes 66 are compared and are arranged at connection pin 45 sides with the first oily supply hole 65.
Thus, thereby if the rocking arm 28 of making to turn round all the time link and drive solenoid 50 that connection pin 45 and stopper pin 46 are advanced with rocking arm 29 intermittently, the opening portion of the first oil discharge hole 66 is clogged by the front end of stopper pin 46 prior to the opening portion of the first oily supply hole 65.After the opening portion of the first oil discharge hole 66 is plugged, for the thrust of stopper pin 46, performance presses by the oily supply of supplying with from the first oily supply hole 61 the larger cushioning effect producing.Therefore the sound producing in the time of, can further suppressing the front end of stopper pin 46 and the collision of the first end wall 44.
Above, embodiments of the present invention are illustrated, but the present invention is not limited to above-mentioned mode of execution, can carries out various design alterations.
For example, in the above-described embodiment, as the engine valve of internal-combustion engine, list suction valve 21 and describe, but also can be using outlet valve 22 as engine valve and applicable the present invention.
Claims (6)
1. a variable valve gear for internal-combustion engine, possesses:
Be arranged at a plurality of cams (32,37) of camshaft (27);
A plurality of rocking arms (28,29,30), it is supported on pitman arm shaft (31,35) with the mode axle that can swing, by swinging to open and close suction valve (21) or outlet valve (22) with described cam butt;
Connection pin (45), it is contained in running side bullport (41), in this running side bullport, sliding contact also can be advanced and retreat, and setting is extended in the inside of all the time running rocking arm (28) of described running side bullport (41) among described a plurality of rocking arms;
Stopper pin (46), it is contained in side bullport at intermittence (42), sliding contact can advancing and retreat in this side bullport at intermittence, described side bullport at intermittence (42) extends and arranges in the inside of the rocking arm at intermittence (29) with the described rocking arm adjacency that turns round all the time, and is connected coaxially with described running side bullport when described suction valve or described outlet valve close valve;
Solenoid (50), its a contrary side and described rocking arm that turns round all the time in rocking arm side at described intermittence arranges adjacently, and make described connection pin and make described stopper pin advance and retreat via this connection pin,
Described connection pin is advanced and retreat between side bullport at described running side bullport and described intermittence, thus by described turn round all the time rocking arm and described intermittence rocking arm link or remove it and link, it is characterized in that,
In the contrary side of described connection pin side of side bullport at described intermittence, be formed with when described stopper pin at utmost advances the first end wall (44) for its front end butt,
Described variable valve gear also possesses:
Oil is supplied with road (60), and it is arranged at the inside of described pitman arm shaft, for the oil of supplying with by oil pump, circulates;
The first oily supply hole (61), it is supplied with road with described oil and is communicated with, and, in the inner face of side bullport at described intermittence, when at utmost retreating, described stopper pin comparing with its front end by described the first end wall side opening, to supplying oil supply in side bullport described intermittence;
The first oil discharge hole (62), it is communicated with comparing with its front end when described stopper pin at utmost retreats by described the first end wall side in the inner face top of side bullport at described intermittence, and, at the outside upper opening of rocking arm at described intermittence, oil was discharged in side bullport from described intermittence.
2. the variable valve gear of internal-combustion engine as claimed in claim 1, is characterized in that,
Described the first oily supply hole and described the first oil discharge hole, compare and be configured in described connection pin side with described the first end wall.
3. the variable valve gear of internal-combustion engine as claimed in claim 1 or 2, is characterized in that,
Described the first oil discharge hole, compares and is configured in described connection pin side with described the first oily supply hole.
4. the variable valve gear of the internal-combustion engine as described in any one of claim 1～3, is characterized in that,
Described intermittence side bullport described the first end wall and the diameter between described the first oily supply hole and described the first oil discharge hole than the hole enlargement of described connection pin side.
5. the variable valve gear of the internal-combustion engine as described in any one of claim 1～4, is characterized in that,
Described solenoid side in described running side bullport, is formed with and when described connection pin at utmost retreats, supplies second end wall (43) of end butt thereafter,
Described variable valve gear also possesses:
The second oily supply hole (63), it is communicated with described oil supply road, and, in the inner face of described running side bullport, comparing by described the second end wall side opening with end thereafter when described connection pin at utmost advances, oil is supplied in described running side bullport;
The second oil discharge hole (64), itself and comparing by described the second end wall side and being communicated with end thereafter when described connection pin at utmost advances in the inner face top of described running side bullport, and, at the outside upper opening of the described rocking arm that turns round all the time, oil is discharged in described running side bullport.
6. the variable valve gear of the internal-combustion engine as described in any one of claim 1～5, is characterized in that,
The entrance part of the described oil pump side in described oil supply road, is provided with aperture (70).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012218154A JP5826145B2 (en) | 2012-09-28 | 2012-09-28 | Variable valve operating device for internal combustion engine |
| JP2012-218154 | 2012-09-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103711541A true CN103711541A (en) | 2014-04-09 |
| CN103711541B CN103711541B (en) | 2016-03-09 |
Family
ID=50404837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310331891.4A Expired - Fee Related CN103711541B (en) | 2012-09-28 | 2013-07-29 | The variable valve gear of internal-combustion engine |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5826145B2 (en) |
| CN (1) | CN103711541B (en) |
| AR (1) | AR091709A1 (en) |
| BR (1) | BR102013024802A2 (en) |
| ES (1) | ES2510140B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779715A (en) * | 2019-02-26 | 2019-05-21 | 浙江大学 | A kind of variable valve timing-lift device and its control method |
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| CN1301912A (en) * | 1999-12-28 | 2001-07-04 | 本田技研工业株式会社 | Valve operation system in IC engine |
| JP2001234719A (en) * | 2000-02-22 | 2001-08-31 | Honda Motor Co Ltd | Valve mechanism of internal combustion engine |
| JP2006300047A (en) * | 2005-03-24 | 2006-11-02 | Honda Motor Co Ltd | Variable valve train for 4-stroke internal combustion engine |
| JP2006299880A (en) * | 2005-04-19 | 2006-11-02 | Honda Motor Co Ltd | Lift variable valve system of internal combustion engine |
| CN101802351A (en) * | 2008-11-05 | 2010-08-11 | 丰田自动车株式会社 | Valve gear for internal combustion engine |
| US20100307434A1 (en) * | 2009-06-09 | 2010-12-09 | Honda Motor Co., Ltd. | Valve control apparatus for internal combustion engine |
| US20110088642A1 (en) * | 2008-05-08 | 2011-04-21 | Toyota Jidosha Kabushiki Kaisha | Valve train system of internal combustion engine |
| JP2012002095A (en) * | 2010-06-15 | 2012-01-05 | Honda Motor Co Ltd | Variable valve system of internal combustion engine |
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| US20120055428A1 (en) * | 2009-05-28 | 2012-03-08 | Toyota Jidosha Kabushiki Kaisha | Variable valve actuation apparatus for internal combustion engine |
-
2012
- 2012-09-28 JP JP2012218154A patent/JP5826145B2/en not_active Expired - Fee Related
-
2013
- 2013-07-08 ES ES201331030A patent/ES2510140B1/en not_active Expired - Fee Related
- 2013-07-08 AR ARP130102432 patent/AR091709A1/en unknown
- 2013-07-29 CN CN201310331891.4A patent/CN103711541B/en not_active Expired - Fee Related
- 2013-09-26 BR BRBR102013024802-9A patent/BR102013024802A2/en not_active Application Discontinuation
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301912A (en) * | 1999-12-28 | 2001-07-04 | 本田技研工业株式会社 | Valve operation system in IC engine |
| JP2001234719A (en) * | 2000-02-22 | 2001-08-31 | Honda Motor Co Ltd | Valve mechanism of internal combustion engine |
| JP2006300047A (en) * | 2005-03-24 | 2006-11-02 | Honda Motor Co Ltd | Variable valve train for 4-stroke internal combustion engine |
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| US20110088642A1 (en) * | 2008-05-08 | 2011-04-21 | Toyota Jidosha Kabushiki Kaisha | Valve train system of internal combustion engine |
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| US20120055428A1 (en) * | 2009-05-28 | 2012-03-08 | Toyota Jidosha Kabushiki Kaisha | Variable valve actuation apparatus for internal combustion engine |
| US20100307434A1 (en) * | 2009-06-09 | 2010-12-09 | Honda Motor Co., Ltd. | Valve control apparatus for internal combustion engine |
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| JP2012007520A (en) * | 2010-06-23 | 2012-01-12 | Honda Motor Co Ltd | Variable valve timing device of internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109779715A (en) * | 2019-02-26 | 2019-05-21 | 浙江大学 | A kind of variable valve timing-lift device and its control method |
| CN109779715B (en) * | 2019-02-26 | 2020-01-17 | 浙江大学 | Variable gas distribution timing-lift device and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2510140A2 (en) | 2014-10-20 |
| JP2014070590A (en) | 2014-04-21 |
| ES2510140B1 (en) | 2015-09-18 |
| JP5826145B2 (en) | 2015-12-02 |
| CN103711541B (en) | 2016-03-09 |
| AR091709A1 (en) | 2015-02-25 |
| ES2510140R1 (en) | 2014-11-24 |
| BR102013024802A2 (en) | 2015-08-11 |
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