CN105392971A

CN105392971A - Valve opening/closing timing control device

Info

Publication number: CN105392971A
Application number: CN201480041229.8A
Authority: CN
Inventors: 岩屋崇; 沼波晃志; 天野宽之
Original assignee: Aisin Seiki Co Ltd
Current assignee: Aisin Corp
Priority date: 2013-08-08
Filing date: 2014-06-25
Publication date: 2016-03-09
Anticipated expiration: 2034-06-25
Also published as: WO2015019735A1; EP3032050B1; US20160169061A1; EP3032050A4; EP3032050A1; JP2015034501A; JP6036600B2; CN105392971B

Abstract

A valve opening/closing timing control device capable of moving quickly to an intermediate locked phase, said control device being equipped with: vanes capable of selectively moving the relative rotational phase of a driven-side rotary member with respect to a driving-side rotary member, between a retarded direction wherein the volume of a retard chamber is increased by the inflow of a fluid, and an advance direction wherein the volume of an advance chamber is increased by the inflow of the fluid; an intermediate lock mechanism capable of switching between a locked state, wherein a lock member provided on the driving-side rotary member protrudes and fits into a recess provided on the driven-side rotary member, thereby holding the relative rotational phase in an intermediate locked phase, and an unlocked state, wherein the lock member withdraws from the recess, thereby releasing the hold; and a phase control unit that controls the supply of fluid to the retard chamber and the discharge of fluid from the advance chamber, or the discharge of fluid from the retard chamber and the supply of fluid to the advance chamber, such that the lock member reaches the intermediate locked phase with the movement speed from a standard phase to the intermediate locked phase being slower than the movement speed to the reference position, when the intermediate lock mechanism switches from the unlocked state to the locked state.

Description

Valve opening/closing timing control device

Technical field

The present invention relates to a kind of valve opening/closing timing control device, the relative rotation phase of the driving side rotary component that the slave end rotary component that this valve opening/closing timing control device controls to rotate with the integrated camshaft of internal-combustion engine rotates relative to the crankshaft-synchronous with internal-combustion engine.

Background technique

In the past, in order to the fuel availability realizing internal-combustion engine (hereinafter referred to as " motor ") improves, make use of the valve opening/closing timing control device that the one in suction valve and outlet valve or both opening/closing timings are controlled.The relative rotation phase of slave end rotary component that this valve opening/closing timing control device changes the driving side rotary component that rotates with crankshaft-synchronous and rotates with integrated camshaft, thus above-mentioned opening/closing timing is controlled.

Generally speaking, air inlet and exhaust valve best opening/closing timing according to engine start time, vehicle travel time etc. the operational situation of motor and different.When engine start, by slave end rotary component is constrained in prescribed phases between maximum retardation angle phase place and full aduance phase place relative to the relative rotation phase (hereinafter referred to as " relative rotation phase ") of the rotation of driving side rotary component, thus realize the opening/closing timing to the air inlet and exhaust valve of engine start the best.But, during idling after the engine is started up, if relative rotation phase to be maintained phase place during engine start, hydrocarbon (HC) discharge capacity increases, and therefore during idling after the engine is started up, ites is desirable to make relative rotation phase to the phase change that can suppress HC discharge capacity.In addition, when trampling brake petal and temporarily stop the idle stop of motor when stopping in usual running, ites is desirable to make relative rotation phase to the relative rotation phase change being easy to make the motor of the condition of high temperature to restart.Represent below in the patent documentation 1 in source and describe this technology.

Patent Document 1 discloses a kind of variable valve timing control device of internal-combustion engine, the variable valve timing control device of this internal-combustion engine possess by the camshaft of internal-combustion engine relative to the rotatable phase of bent axle be locked in be positioned at its can adjustment range roughly in the middle of the function of medium lock phase bit.The variable valve timing control device of this internal-combustion engine is configured to possess locking control unit, this locking control unit create locking require time to utilize stop pin to the mode hydraulic control control gear making the rotatable phase of camshaft be locked in medium lock phase bit.This locking control unit when creating locking and requiring to exert a force while the mode making the rotatable phase of camshaft cross medium lock phase bit controls hydraulic control device to locking direction to stop pin on one side, and when the rotatable phase that this phase variable controls convexity wheel shaft does not move near medium lock phase bit, make the controlled quentity controlled variable of hydraulic control device change established amount further to the direction of the rotatable phase movement making camshaft.Now, locking has been judged to be when the rotatable phase of camshaft does not move.

Prior art document

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2010-138699 publication

Summary of the invention

The problem to be solved in the present invention

The technology recorded in patent documentation 1 is that, when creating locking and requiring, the mode of crossing medium lock phase bit with the rotatable phase of camshaft controls.In addition, after carrying out this control, make when the rotatable phase of camshaft does not move near medium lock phase bit the controlled quentity controlled variable of hydraulic control device change established amount further to the direction of the rotatable phase movement making camshaft, and be judged to be locking when the rotatable phase of camshaft does not move.Therefore, the rotatable phase of camshaft crosses medium lock phase bit sometimes, now, causes until to complete locking consuming time longer.

The object of the invention is in view of the above problems and the valve opening/closing timing control device promptly can transferring to medium lock phase bit is provided.

For the technological scheme of dealing with problems

The feature structure of the valve opening/closing timing control device that the present invention in order to achieve the above object relates to is to possess: driving side rotary component, and the crankshaft-synchronous of itself and internal-combustion engine rotates, slave end rotary component, the integrated camshaft of itself and described internal-combustion engine rotates, and relatively can rotate relative to described driving side rotary component, fluid pressure chamber, it is formed by described driving side rotary component and described slave end rotary component, blade, it is indoor that it is configured in described hydrodynamic pressure, and described fluid pressure chamber is divided into retardation angle room and the advance angle room of inflow or the discharge of allowing fluid, and make described slave end rotary component relative to described driving side rotary component relative rotation phase optionally in the inflow by described fluid described retardation angle indoor volume increase retardation angle direction and by the inflow of described fluid the volume of described advance angle indoor increase advance angle direction between move, middle locking framework, it comprises arbitrary one of being arranged in described driving side rotary component and described slave end rotary component and can carry out the Lock Part of movement relative to another one, circumferentially extend and be arranged on the recess of the arbitrary another one in described driving side rotary component and described slave end rotary component, and lock state and latch-release state can be switched to, wherein, described lock state is embedded in described recess by described Lock Part and described relative rotation phase is constrained in the state of the medium lock phase bit between full aduance phase place and maximum retardation angle phase place, described latch-release state is retired from office and the state of constraint relief from described recess by described Lock Part, and phase control division, it is when described middle locking framework switches to described lock state from described latch-release state, the travelling speed of the described relative rotation phase making from reference phase to described medium lock phase bit is slower than until be arranged on the travelling speed of the described relative rotation phase of the described reference phase between current phase place and described medium lock phase bit, the mode arriving described medium lock phase bit with described Lock Part controls the discharge to the supply of the fluid of described retardation angle room and the fluid from described advance angle room, or from the supply of the discharge of the fluid of described retardation angle room and the fluid to described advance angle room.

According to this feature structure, promptly can carry out until the movement of reference phase, and slave end rotary component just can be made reliably to be positioned at lock state relative to the relative rotation phase of driving side rotary component without the need to crossing medium lock phase bit.Thus, medium lock phase bit can promptly be transferred to.

In addition, preferably, described phase control division according to the slack-off mode of fixing variable quantity, controls the one among the supply to the fluid of described retardation angle room and the discharge from the fluid of described advance angle room and the discharge from the fluid of described retardation angle room and the supply to the fluid of described advance angle room with the travelling speed of the described relative rotation phase from described current phase place to described medium lock phase bit.

According to this structure, easily can predict the time from current phase shift to medium lock phase bit, link up therefore, it is possible to effectively operate with the next one.

In addition, preferably, described phase control division based on by the described relative rotation phase from described current phase place to described medium lock phase bit travelling speed and represent the mapping of relation defined of quantity of state of state of the fluid to described retardation angle room and described advance angle room, control the one among the supply to the fluid of described retardation angle room and the discharge from the fluid of described advance angle room and the discharge from the fluid of described retardation angle room and the supply to the fluid of described advance angle room.

The circulation degree of difficulty of fluid when stream circulates is such as according to the pressure of fluid, temperature and changing.Therefore, using the quantity of state as the state of expression fluid such as the pressure of this fluid, temperature, prestore the mapping defining this quantity of state and travelling speed, phase control division controls supply according to this mapping and discharges, thus can promptly transfer to medium lock phase bit.

In addition, preferably, judgement phase place is provided with between described medium lock phase bit and described reference phase, also possess and judge whether described Lock Part arrives the detection unit of described judgement phase place, described detection unit implements the discharge to the supply of the fluid of described retardation angle room and the fluid from described advance angle room at described phase control division, with the discharge of the fluid from described retardation angle room and to the one among the supply of the fluid of described advance angle room control after, when the mode moving to described judgement phase place with described Lock Part has carried out control, judge whether described Lock Part arrives described judgement phase place.

According to this structure, can reduce between medium lock phase bit and the position judging phase place, therefore, it is possible to reliably judge whether Lock Part arrives medium lock phase bit.

In addition, preferably, described relative rotation phase moves based on the first travelling speed from described current phase place to described reference phase, and moves based on the second travelling speed being slower than described first travelling speed to described medium lock phase bit from described reference phase.

According to this structure, when being transferred to medium lock phase bit after from current phase shift to reference phase, from reference phase, owing to reducing the travelling speed of relative rotation phase, therefore, it is possible to prevent the situation through medium lock phase bit.Thus, without the need to through medium lock phase bit, can promptly and reliably from current phase shift to medium lock phase bit.

Accompanying drawing explanation

Fig. 1 is the sectional view of valve opening/closing timing control device.

Fig. 2 is the figure of the section of the lock state represented on the II-II line of Fig. 1.

Fig. 3 is the figure of the section of the latch-release state represented on the II-II line of Fig. 1.

Fig. 4 is the figure of the section of the maximum retardation angle phase state represented on the II-II line of Fig. 1.

Fig. 5 is the figure of the reference phase schematically shown to move to medium lock phase bit from current location along advance angle direction.

Fig. 6 is the figure of the reference phase schematically shown to move to medium lock phase bit from current location along retardation angle direction.

Fig. 7 is the figure of the example of the travelling speed represented when relatively rotating from current phase place to medium lock phase bit.

Fig. 8 is the figure of the example of the travelling speed represented when relatively rotating from current phase place to medium lock phase bit.

Embodiment

The valve opening/closing timing control device that the present invention relates to is configured to, and when the relative rotation phase making slave end rotary component relative to driving side rotary component is positioned at medium lock phase bit, Lock Part can be made promptly to transfer to medium lock phase bit.Below, the valve opening/closing timing control device 1 of present embodiment is explained.Fig. 1 is the integrally-built side sectional view representing valve opening/closing timing control device 1 of the present embodiment.Fig. 2-Fig. 4 is the figure of the section of the various states represented on the II-II line of Fig. 1.Valve opening/closing timing control device 1 be mounted in possess as driving source as the motor of internal-combustion engine E vehicle or possess on the motor vehicle driven by mixed power of the driving source comprising motor and electric motor.

Valve opening/closing timing control device 1 possesses the external rotor 12 as driving side rotary component and the inner rotator 2 as slave end rotary component and forms.External rotor 12 is relative to bent axle 110 synchronous rotary of internal-combustion engine E.Inner rotator 2 can rotate integrally relative to the camshaft 101 of internal-combustion engine E and configure on coaxial with the relative rotation relative to external rotor 12.In the present embodiment, valve opening/closing timing control device 1, by the relative rotation phase (relative rotation angle) of setting centered by the axle center X of external rotor 12 and inner rotator 2, controls the opening and closing timing of suction valve 115.

Inner rotator 2 is assembled in the front end of camshaft 101 integratedly.Specifically, inner rotator 2 utilizes clamping bolt 20 to be fastened and fixed front end at camshaft 101.

Valve opening/closing timing control device 1 is configured to be possessed: the header board 11 being arranged on the side contrary with the side connecting camshaft 101; External rotor 12; And be integrally formed with timing sprocket 15 and be arranged on the rear plate 13 of side connecting camshaft 101.Be loaded on inner rotator 2 outside external rotor 12, and clamped from axial both sides by header board 11 and rear plate 13.Header board 11, external rotor 12, rear plate 13 utilize above-mentioned clamping bolt 20 fastened fixing in this condition.

If bent axle 110 rotary actuation, then transmit rotary driving force via power transmission member 102 to timing sprocket 15, external rotor 12 is to the sense of rotation S rotary actuation shown in Fig. 2.Along with the rotary actuation of external rotor 12, inner rotator 2 to sense of rotation S rotary actuation thus camshaft 101 rotate, the cam 116 being arranged at camshaft 101 presses down the suction valve 115 of internal-combustion engine E thus opens valve.

As shown in Figure 2, on external rotor 12, be formed discretely mutually to the outstanding multiple protuberances 14 of radially inner side along sense of rotation S-phase, form fluid pressure chamber 4 by external rotor 12 and inner rotator 2.Protuberance 14 as the outer circumferential face 2a to inner rotator 2 crawler shoe and work.In the present embodiment, illustrate the example being formed with four fluid pressure chamber 4, but be not limited thereto.

The part in the face of fluid pressure chamber 4 among outer circumferential face 2a, is formed the blade groove 21 of the radial direction of inner rotator 2 as depth direction.In blade groove 21, be inserted with a part for blade 22, this blade 22 is erect and is arranged and be configured in radial outside.Thus, blade 22 is configured in fluid pressure chamber 4.

In addition, fluid pressure chamber 4 utilizes blade 22 to be divided into along sense of rotation S to allow the inflow of oil or the advance angle room 41 of discharge and retardation angle room 42.When supplying oil supply to retardation angle room 42, inner rotator 2 moves (displacement) to the retardation angle direction among sense of rotation relative to the relative rotation phase of external rotor 12.Retardation angle direction refers to the direction that the volume of inflow according to oil and retardation angle room 42 increases, and is in fig. 2 with the direction that reference character S2 represents.When supplying oil supply to advance angle room 41, relative rotation phase moves (displacement) to the advance angle direction among sense of rotation.Advance angle direction refer to blade 22 relative to external rotor 12 carry out relatively in rotary moving and according to the inflow of oil the direction that the volume of advance angle room 41 increases, be in fig. 2 with the direction that reference character S1 represents.Between blade groove 21 and blade 22, be configured with spring 23, to radial outside, blade 22 exerted a force.Thus, the leakage of the oil between advance angle room 41 and retardation angle room 42 is prevented.Blade 22 makes above-mentioned relative rotation phase optionally move between retardation angle direction and advance angle direction.

As shown in Figures 1 and 2, in the mode be communicated with each advance angle room 41, advance angle path 43 is formed in inner rotator 2 and camshaft 101.In addition, in the mode be communicated with each retardation angle room 42, retardation angle path 44 is formed in inner rotator 2 and camshaft 101.Advance angle path 43 and retardation angle path 44 are connected with the port of the regulation of the first control valve 174.

By controlling the first control valve 174, thus advance angle room 41 and retardation angle room 42 are supplied, discharge oil, or keep supply and the discharge of oil, make the fluid pressure action of this oil in blade 22.So, relative rotation phase is conjugated to advance angle direction S1 or retardation angle direction S2, or remains on arbitrary phase place.

In addition, as shown in Figure 1, in the gamut of inner rotator 2 and header board 11, torsion spring 3 is provided with.Torsion spring 3, in the mode of opposing based on the average displacement power to retardation angle direction S2 of the cogging of camshaft 101, exerts a force to advance side to inner rotator 2.Thereby, it is possible to make relative rotation phase smooth and easy and promptly conjugate to advance angle direction S1.

According to this structure, inner rotator 2 can be carried out relatively in rotary moving swimmingly around axle center X relative to external rotor 12 in fixed range.External rotor 12 and inner rotator 2 can the phase difference of relative fixed range in rotary moving, i.e. full aduance phase place and maximum retardation angle phase place correspond to blade 22 can in the scope of the inside of fluid pressure chamber 4 displacement.It is maximum retardation angle phase place that the volume of retardation angle room 42 becomes maximum, and it is full aduance phase place that the volume of advance angle room 41 becomes maximum.

Under middle locking framework 6 waits the situation of the hydrodynamic pressure instability of oil after internal-combustion engine E has just started, by external rotor 12 and inner rotator 2 being remained on the relative position of regulation, thus the relative rotation phase of external rotor 12 and inner rotator 2 is constrained in the medium lock phase bit between maximum retardation angle phase place and full aduance phase place.So, by relative rotation phase is remained on medium lock phase bit, thus suitably maintain the rotatable phase of the camshaft 101 relative to the rotatable phase of bent axle 110, and realize the stable rotation of internal-combustion engine E.In addition, in the present embodiment, medium lock phase bit is set as, the phase place opening a valve part in the period repetition phase place of (partly overlapping) or the timing of the cut-off valve of outlet valve and the timing of opening valve of suction valve 115 roughly equal (zero is overlapping) of suction valve 115 and outlet valve.Its result, if the phase place opening the repetition of a valve part in period of suction valve 115 and outlet valve, then can realize the minimizing of the hydrocarbon (HC) when internal-combustion engine E starts, and can as the internal-combustion engine E of low emission.In addition, if the phase place that the timing of opening valve of the timing of the cut-off valve of outlet valve and suction valve 115 is roughly equal, then can as the startability in cool region and the good internal-combustion engine E of idle stability.

In the present embodiment, as shown in Figures 1 and 2, middle locking framework 6 is configured to two the medium lock limiting-members 64 and the spring 65 that possess locking slot 62, accommodating part 63, tabular in the middle of middle locking 61, two, path.Middle locking slot 62 is equivalent to recess of the present invention, and medium lock limiting-members 64 is equivalent to Lock Part of the present invention.

Middle locking path 61 is formed at inner rotator 2 and camshaft 101, and connects middle locking slot 62 and the second control valve 175.By controlling the second control valve 175, the supply to the oil of middle locking slot 62 and discharge can be switched individually.Middle locking slot 62 to be formed as on the outer circumferential face 2a of inner rotator 2 circumferentially, and has fixed width in relative sense of rotation.Accommodating part 63 is formed in two positions of external rotor 12.Two medium lock limiting-members 64 are configured at each accommodating part 63 respectively, radially can retreat from accommodating part 63.Therefore, medium lock limiting-members 64 is formed at external rotor 12 in the present embodiment, and can move relative to inner rotator 2.Spring 65 is configured in accommodating part 63, and to radially inner side, namely exert a force to middle locking slot 62 side to each medium lock limiting-members 64.

If discharge oil from middle locking slot 62, then two medium lock limiting-members 64 are given prominence to respectively and are embedded in middle locking slot 62 respectively, thus each medium lock limiting-members 64 is engaging in the position of the regulation of middle locking slot 62 respectively simultaneously.Its result, as shown in Figure 2, inner rotator 2 is constrained on above-mentioned medium lock phase bit relative to the relative rotation phase of external rotor 12.If control the second control valve 175 and supply oil supply to middle locking slot 62, then as shown in Figure 3, two medium lock limiting-members 64 are retired from office from middle locking slot 62 to accommodating part 63 thus remove the constraint of relative rotation phase, and inner rotator 2 becomes can be relatively freely in rotary moving.Below, the state by middle locking framework 6 relative rotation phase being constrained in intermediate phase is called " lock state ".In addition, lock state is called " latch-release state " by the state removed.Middle locking framework 6 is configured to can switch this " lock state " and " latch-release state ".

In addition, as the shape of medium lock limiting-members 64, except the tabular shown in present embodiment, can also suitably adopt pin-shaped etc.

In the present embodiment, two middle locking slot 62 are formed as ratchet structure with groove depth along the interim mode deepened of the retardation angle direction S2 in inner rotator 2.Thus, medium lock limiting-members 64 stage is limited, and medium lock limiting-members 64 is easy to enter middle locking slot 62.In addition, middle locking path 61 is divided into two-way in the way of inner rotator 2, and is connected with each middle locking slot 62.

This valve opening/closing timing control device 1, except possessing above-mentioned middle locking framework 6, also possesses maximum retardation angle locking framework 7.Relative rotation phase during low speed rotation, by external rotor 12 and inner rotator 2 being remained on the relative position of regulation, thus is constrained in maximum retardation angle phase place when idle running etc. by maximum retardation angle locking framework 7.That is, regardless of the retardation angle direction S2 of the cogging based on camshaft 101 and the displacement power of advance angle direction S1, because inner rotator 2 is not carried out relatively in rotary moving, therefore, it is possible to realize stable idle state.In addition, in the present embodiment, maximum retardation angle phase place is in the more late phase place opening valve period of the cut-off valve timing than outlet valve, and is the phase place can avoided premature firing in the warm region of internal-combustion engine E and can guarantee the startability of internal-combustion engine E.

As shown in Figure 2, maximum retardation angle locking framework 7 possesses maximum retardation angle locking path 71, maximum retardation angle locking slot 72, accommodating part 73, the maximum retardation angle Lock Part 74 of tabular and spring 75.In the present embodiment, maximum retardation angle locks path 71 and forms with among multiple advance angle path 43.Maximum retardation angle Lock Part 74 is parts identical with the medium lock limiting-members 64 of the S1 side, advance angle direction among two medium lock limiting-members 64.Similarly, accommodating part 73 is identical with the accommodating part 63 of the S1 side, advance angle direction among two accommodating parts 63, and spring 75 is identical with the spring 65 being configured in this accommodating part 63.

In such an embodiment, if discharge oil from maximum retardation angle locking slot 72, then maximum retardation angle Lock Part 74 is outstanding to maximum retardation angle locking slot 72.As shown in Figure 4, if maximum retardation angle Lock Part 74 is engaging in maximum retardation angle locking slot 72, then relatively in rotary moving restrained relative to external rotor 12 of inner rotator 2, relative rotation phase is maintained at maximum retardation angle phase place.If want by controlling the first control valve 174 and make relative rotation phase conjugate to advance side, then supply oil supply to maximum retardation angle locking slot 72, and maximum retardation angle Lock Part 74 is retired from office to accommodating part 73 from maximum retardation angle locking slot 72.That is, the constraint of relative rotation phase is removed.

When relative rotation phase is the phase place beyond maximum retardation angle phase place, because maximum retardation angle Lock Part 74 misplaces with maximum retardation angle locking slot 72, therefore only sliding contact on the outer circumferential face 2a of inner rotator 2.In addition, as the shape of maximum retardation angle Lock Part 74, except the tabular shown in present embodiment, can also suitably adopt pin-shaped etc.

In such an embodiment, under intermediate locking state as shown in Figure 2, if stop powering to the second control valve 175, then as shown in Figure 3, become latch-release state.Afterwards, as long as continue to stop powering to the second control valve 175, just continue to middle locking slot 62 for oil supply, therefore medium lock limiting-members 64 can not enter middle locking slot 62.

As shown in Figure 4, if relative rotation phase is indexed to maximum retardation angle phase place, maximum retardation angle Lock Part 74 is opposed with maximum retardation angle locking slot 72, then maximum retardation angle Lock Part 74 (64) enters maximum retardation angle locking slot 72, becomes maximum retardation angle lock state.

So, if the structure of application present embodiment, then can simplified structure, and can reducing portion pieces number, and can fabricating cost be reduced.In addition, due to shared medium lock limiting-members 64 and maximum retardation angle Lock Part 74, on external rotor 12, therefore circumferentially produce the affluence in space, as shown in Figure 2, four fluid pressure chamber 4 can be possessed.Its result, the power that relative rotation phase is conjugated increases, and can realize phase place displacement rapidly.In addition, by expanding the width in the circumference of fluid pressure chamber 4, the scope that can conjugate of relative rotation phase can also be expanded.

Secondly, the structure of oil hydraulic circuit of the present embodiment is described.As shown in Figure 1, oil hydraulic circuit is provided with: driven by internal-combustion engine E and carry out the pump 171 of supply of oil; Control the first control valve 174 to the supply of the oil of fluid pressure chamber 4; And the second control valve 175 controlled to the supply of the oil of middle locking framework 6.

Phase control division 180 in order to control above-mentioned relative rotation phase, and carries out the action control of the first control valve 174 and the second control valve 175.Phase control division 180 is such as when middle locking framework 6 is switched to lock state from latch-release state, the mode of medium lock phase bit is arrived with medium lock limiting-members 64, control the discharge to the supply of the fluid of retardation angle room 42 and the fluid from advance angle room 41, or control the supply from the discharge of the fluid of retardation angle room 42 and the fluid to advance angle room 41.This phase control division 180 make use of arithmetic processing apparatus, can be made up of independent control apparatus, also can be made up of multiple control apparatus.

In the present embodiment, by the rotating force by transmitting from the bent axle 110 of internal-combustion engine E, driven mechanical type hydraulic pump is formed pump 171.Pump 171 sucks the oil being stored in food tray 176 from suction port, and goes out this oil from ejiction opening to downstream side spray.The port of the regulation of the ejiction opening of pump 171 and the first control valve 174 and the second control valve 175 is communicated with.

First control valve 174 such as can use changable type magnetic slide valve, and this changable type magnetic slide valve is conjugated by the traveller opposing spring making to be configured in slidably in sleeve to solenoidal energising from phase control division 180.This first control valve 174 has: the advance angle mouth be communicated with advance angle path 43; The retardation angle mouth be communicated with retardation angle path 44; With the supplying mouth of the fluid communication in the downstream side of pump 171; And the outfall to be communicated with food tray 176.

First control valve 174 is made up of three valve position controls, and this three valve position control can carry out following three states and control: advance angle mouth is communicated with and the advance angle that retardation angle mouth is communicated with outfall controls with supplying mouth; Retardation angle mouth is communicated with and the retardation angle that advance angle mouth is communicated with outfall controls with supplying mouth; And the retentive control of blocking advance angle mouth and retardation angle mouth.By carrying out advance angle control, blade 22 is relatively in rotary moving to advance angle direction S1 relative to external rotor 12, and relative rotation phase conjugates to advance side.If carry out retardation angle control, then blade 22 is relatively in rotary moving to retardation angle direction S2 relative to external rotor 12, and relative rotation phase conjugates to retardation angle side.If carry out retentive control, then blade 22 does not carry out relatively in rotary moving, relative rotation phase can be remained on arbitrary phase place.

If carry out advance angle control, then supply oil supply to advance angle path 43 and maximum retardation angle locking path 71.When being in maximum retardation angle lock state, maximum retardation angle locking path 71 is blocked by maximum retardation angle Lock Part 74.If controlled by advance angle and maximum retardation angle Lock Part 74 is retired from office from maximum retardation angle locking slot 72 and becomes maximum retardation angle latch-release state, then supply oil supply via advance angle path 43 to advance angle room 41, inner rotator 2 is relatively in rotary moving to advance side.

In addition, the first control valve 174 is controlled by phase control division 180 and carries out action, carries out the supply of oil or the control of discharge that advance angle room 41 and maximum retardation angle are locked to path 71 or retardation angle room 42.Thus, the first control valve 174 carries out the control relative to the relative rotation phase of external rotor 12 of the middle lock state of locking framework 6 or the switching controls of relieving state and inner rotator 2.In the present embodiment, the first control valve 174 is set to, if be energized to the first control valve 174, becomes the state can carrying out retardation angle control, if stop the power supply to the first control valve 174, becomes the state can carrying out advance angle control.In addition, the first control valve 174 sets aperture by regulating the dutycycle of the electric power to o supply.Thereby, it is possible to carry out the supply of oil and the fine setting of discharge capacity.

Second control valve 175 uses changable type magnetic slide valve and forms in the same manner as the first control valve 174.Second control valve 175 has: lock with centre the restricted entry that path 61 is communicated with; With the supplying mouth of the fluid communication in the downstream side of pump 171; And the outfall to be communicated with food tray 176.In addition, the second control valve 175 is made up of two positions control valve, and this two positions control valve can carry out following two states and control: the releasing that restricted entry is communicated with supplying mouth controls; And the restriction making restricted entry be communicated with outfall controls.Second control valve 175 is controlled by phase control division 180 and carries out action, and the supply of oil carried out to the middle locking slot 62 of middle locking framework 6 or the control of discharge.So, the second control valve 175 carries out the middle restriction state of locking framework 6 or the switching controls of relieving state.

By the second control valve 175, the discharge to the supply of the oil of middle locking slot 62 and the oil from middle locking slot 62 can be switched.In addition, in the present embodiment, the second control valve 175 is configured to, if power supply, becomes the state of the oil can discharged from middle locking slot 62, if stop power supply, becoming can to the state of middle locking slot 62 for oil supply.

At this, near the bent axle 110 of internal-combustion engine E, possesses the CKP of the angle of rotation detecting this bent axle 110.In addition, near camshaft 101, possesses the CMP of the angle of rotation detecting this camshaft 101.Phase control division 180 detects relative rotation phase according to the testing result of CKP and CMP, and judges which phase place relative rotation phase is in.In addition, the on/off information etc. of ignition switch is passed to phase control division 180.In addition, in the storage of phase control division 180, store the control information of the relative rotation phase of the best corresponding to the operating condition of internal-combustion engine E.Phase control division 180 controls relative rotation phase according to the operating condition of internal-combustion engine E.

The travelling speed of the relative rotation phase phase control division 180 of the present embodiment makes from reference phase to medium lock phase bit is slower than until the travelling speed of relative rotation phase of reference phase, and the one controlled among the supply to the fluid of retardation angle room 42 and the discharge from the fluid of advance angle room 41 and the discharge from the fluid of retardation angle room 42 and the supply to the fluid of advance angle room 41, wherein, reference phase is arranged between current phase place and medium lock phase bit.In the present embodiment, with regard to current phase place, as mentioned above, phase control division 180 detects relative rotation phase according to the testing result of CKP and CMP, and judges which phase place relative rotation phase is in.Between this current phase place and medium lock phase bit, reference phase is set.This reference phase such as also can be arranged in the position of the centre of current phase place and medium lock phase bit at every turn with changing, and also can be set in advance near medium lock phase bit.

This reference phase and medium lock phase bit are shown schematically in Fig. 5 and Fig. 6.The example of Fig. 5 to be the state that is not positioned at middle locking slot 62 respectively from two medium lock limiting-members 64 rotated to advance angle direction S1 by inner rotator 2 and transfer to medium lock phase bit, the example of Fig. 6 to be the state that is not positioned at middle locking slot 62 respectively from two medium lock limiting-members 64 rotated to retardation angle direction S2 by inner rotator 2 and transfer to medium lock phase bit.In Fig. 5 and Fig. 6, when the position of mark reference character A is medium lock phase bit, the position of mark reference character O is current phase place, reference phase P is set between which.In addition, in Figure 5, reference phase P is arranged in middle locking slot 62, but also can be arranged on outside middle locking slot 62.In addition, in figure 6, reference phase P is arranged on outside middle locking slot 62, but also can be arranged in middle locking slot 62.

In this case, phase control division 180 with from the travelling speed of the relative rotation phase the position P of position O via reference phase of current phase place and then the position A to medium lock phase bit according to the slack-off mode of fixing variable quantity, control the one among the supply to the fluid of retardation angle room 42 and the discharge from the fluid of advance angle room 41 and the discharge from the fluid of retardation angle room 42 and the supply to the fluid of advance angle room 41.Refer to that travelling speed is with the slack-off situation of fixing negative acceleration, as shown in Figure 7, refers to the situation that travelling speed is slack-off gradually according to fixing variable quantity is slack-off.Thereby, it is possible to from current phase place promptly and reliably transfer to medium lock phase bit.

In addition, the change of the travelling speed shown in Fig. 7 is an example, such as shown in Fig. 8, also following structure can be set to: move based on the first travelling speed specified from the position O to the position P of reference phase of current phase place, move based on the second travelling speed slower than this first travelling speed from the position P to the position A of medium lock phase bit of reference phase, can certainly be set to as follows: during shifting the position O to the position A of medium lock phase bit of current phase place, change travelling speed with more than three grades.

In the present embodiment, detection unit 181, after the control of the supply undertaken by phase control division 180 and discharge, when having carried out control with medium lock limiting-members 64 to the mode of reference phase side movement, has judged whether medium lock limiting-members 64 arrives this reference phase.The supply undertaken by phase control division 180 and the control of discharge refer to, carry out the control of the one among the supply to the fluid of retardation angle room 42 and the discharge from the fluid of advance angle room 41 and the discharge from the fluid of retardation angle room 42 and the supply to the fluid of advance angle room 41 in the mediate mode of locking phase of medium lock limiting-members 64.

Below, be described this as " judging to control " using the situation of carrying out controlling to the mode of reference phase side when medium lock phase bit (transfer to be positioned at " current phase place " side) movement.After having carried out this judgement and having controlled, by detection unit 181 determine medium lock limiting-members 64 arrived the position P of reference phase when, its result is passed to phase control division 180.In this case, phase control division 180 identifies inner rotator 2 and not to mediate locking phase relative to the relative rotation phase of external rotor 12, and phase control division 180 controls the first control valve 174 and makes it transfer to medium lock phase bit.

On the other hand, after having carried out judging to control, by detection unit 181 determine medium lock limiting-members 64 do not arrive the position P of reference phase when, its result is passed to phase control division 180.In this case, phase control division 180 identifies inner rotator 2 and to mediate locking phase relative to the relative rotation phase of external rotor 12, and phase control division 180 stops the control carrying out the first control valve 174.

In addition, in the present embodiment, after the control of the supply undertaken by the first control valve 174 and discharge by detection unit 181 determine medium lock limiting-members 64 be not in the position P of reference phase, phase control division 180 is alternately respectively to retardation angle room 42 and advance angle room 41 delivering fluids.So-called after the control of the supply undertaken by the first control valve 174 and discharge, determine by detection unit 181 situation that medium lock limiting-members 64 is not in the position P of reference phase, be equivalent to the situation that medium lock limiting-members 64 is positioned at medium lock phase bit.In this case, because inner rotator 2 is limited relative rotation with external rotor 12, therefore, by by phase control division 180 alternately respectively to retardation angle room 42 and advance angle room 41 delivering fluids, under relatively rotating confined state, blade 22 shakes to advance angle direction S1 and retardation angle direction S2.So, if medium lock limiting-members 64 does not arrive reference phase, then can be judged to be that medium lock limiting-members 64 is reliably embedded into middle locking slot 62.Thus, according to this structure, the embedding state of medium lock limiting-members 64 can be confirmed.In addition, by increasing and decreasing the hydraulic pressure of retardation angle room 42 and advance angle room 41, the hydraulic pressure of the path be connected with these can also be increased and decreased, therefore, it is possible to make the impurity in path circulate and remove this impurity (cleaning) together with retardation angle room 42 and advance angle room 41.

[other mode of executions]

In the above-described embodiment, in the middle of describing two, locking slot 62 is formed as the situation of ratchet structure in the mode that the groove depth stage along the retardation angle direction S2 in inner rotator 2 deepens.But Applicable scope of the present invention is not limited thereto.Can certainly be made up of the uniform middle locking slot 62 of groove depth.

In addition, in the above-described embodiment, the situation being respectively provided with two middle locking slot 62 and medium lock limiting-members 64 is illustrated.But Applicable scope of the present invention is not limited thereto.Such as, locking slot 62 and medium lock limiting-members 64 in the middle of also respectively can arranging one, and the mode that middle locking slot 62 deepens with the groove depth stage along the retardation angle direction S2 in inner rotator 2 is formed as ratchet structure.Now, preferably, the length setting of the circumference of the side that groove depth is darker is following degree: time in the groove that medium lock limiting-members 64 is embedded into this darker side, external rotor 12 does not carry out relative rotation with inner rotator 2.

In addition, also can be made up of the uniform middle locking slot 62 of groove depth.Now, preferably, the length setting in the circumference of middle locking slot 62 is following degree: though when medium lock limiting-members 64 be embedded into this middle locking slot 62, also can allow the relative rotation of external rotor 12 and inner rotator 2.

In the above-described embodiment, the situation that middle Lock Part 64 is arranged at external rotor 12, middle locking slot 62 is arranged at inner rotator 2 is illustrated.But Applicable scope of the present invention is not limited thereto.Can certainly be configured to: medium lock limiting-members 64 is arranged at inner rotator 2, middle locking slot 62 is arranged at external rotor 12.

In the above-described embodiment, describe following situation: after the control of the supply undertaken by the first control valve 174 and discharge by detection unit 181 determine medium lock limiting-members 64 be not in the position P of reference phase, phase control division 180 is alternately respectively to retardation angle room 42 and advance angle room 41 delivering fluids.But Applicable scope of the present invention is not limited thereto.Following structure can certainly be set to: after the control of the supply undertaken by the first control valve 174 and discharge by detection unit 181 determine medium lock limiting-members 64 be not in the position P of reference phase, phase control division 180 is not alternately respectively to retardation angle room 42 and advance angle room 41 delivering fluids.In addition, can certainly be set to following structure: when being judged by detection unit 181, phase control division 180 is alternately respectively to retardation angle room 42 and advance angle room 41 delivering fluids.

In the above-described embodiment, enumerate valve opening/closing timing control device 1 control suction valve 115 opening and closing timing example be illustrated.But Applicable scope of the present invention is not limited thereto.The structure that valve opening/closing timing control device 1 controls the opening and closing timing of outlet valve can certainly be set to.

In the above-described embodiment, describe following situation: detection unit 181 is after the control of the supply undertaken by phase control division 180 and discharge, when having carried out control with medium lock limiting-members 64 to the mode of reference phase side movement, judge whether medium lock limiting-members 64 arrives this reference phase.But Applicable scope of the present invention is not limited thereto.Can certainly be set to following structure: the position judging phase place is set between the position A and the position P of reference phase of medium lock phase bit, detection unit 181 is after the control being implemented the one among the supply to the fluid of retardation angle room 42 and the discharge from the fluid of advance angle room 41 and the discharge from the fluid of retardation angle room 42 and the supply to the fluid of advance angle room 41 by phase control division 180, with medium lock limiting-members 64 to when judging that the mode of phase place side movement has carried out control, judge whether medium lock limiting-members 64 arrives the position of this judgement phase place.In this case, between the position that can reduce medium lock phase bit and carry out judging (judging the position of phase place), therefore, it is possible to judge whether medium lock limiting-members 64 arrives medium lock phase bit more reliably.

In the above-described embodiment, describe following situation: phase control division 180 with from the travelling speed of the relative rotation phase of current phase place to medium lock phase bit according to the slack-off mode of fixing variable quantity, control the one among the supply to the fluid of retardation angle room 42 and the discharge from the fluid of advance angle room 41 and the discharge from the fluid of retardation angle room 42 and the supply to the fluid of advance angle room 41.But Applicable scope of the present invention is not limited thereto.Such as, phase control division 180 also can based on by the relative rotation phase from current phase place to medium lock phase bit travelling speed and represent the mapping of relation defined of quantity of state of state of the fluid to retardation angle room 42 and advance angle room 41, control the one among the supply to the fluid of retardation angle room 42 and the discharge from the fluid of advance angle room 41 and the discharge from the fluid of retardation angle room 42 and the supply to the fluid of advance angle room 41.Represent that the quantity of state of the state of fluid is such as equivalent to temperature, the pressure of fluid.Also can be set to following structure: prestore with the temperature of this fluid, the relation of pressure to define the mapping of travelling speed, phase control division 180 carrys out the hydraulic pressure of room, control hysteresis angle 42 and advance angle room 41 based on this mapping.In this case, also can by controlling, for the travelling speed making from reference phase to medium lock phase bit is slower than from the travelling speed of current phase place to reference phase, can promptly transfer to medium lock phase bit.

Industrial practicability

The valve opening/closing timing control device that the relative rotation phase that the present invention can be applied to the driving side rotary component that the slave end rotary component that rotates the integrated camshaft with internal-combustion engine rotates relative to the crankshaft-synchronous with internal-combustion engine controls.

Description of reference numerals

1: valve opening/closing timing control device, 2: inner rotator (slave end rotary component), 4: fluid pressure chamber, 6: middle locking framework, 12: external rotor (driving side rotary component), 22: blade, 41: advance angle room, 42: retardation angle room, 62: middle locking slot (recess), 64: medium lock limiting-members (Lock Part), 101: camshaft, 110: bent axle, 180: phase control division, E: internal-combustion engine, S1: advance angle direction, S2: retardation angle direction.

Claims

1. a valve opening/closing timing control device, is characterized in that, possesses:

Driving side rotary component, the crankshaft-synchronous of itself and internal-combustion engine rotates;

Slave end rotary component, the integrated camshaft of itself and described internal-combustion engine rotates, and relatively can rotate relative to described driving side rotary component;

Fluid pressure chamber, it is formed by described driving side rotary component and described slave end rotary component;

Blade, it is indoor that it is configured in described hydrodynamic pressure, and described fluid pressure chamber is divided into retardation angle room and the advance angle room of inflow or the discharge of allowing fluid, and make described slave end rotary component relative to described driving side rotary component relative rotation phase optionally in the inflow by described fluid described retardation angle indoor volume increase retardation angle direction and by the inflow of described fluid the volume of described advance angle indoor increase advance angle direction between move;

Middle locking framework, it comprises arbitrary one of being arranged in described driving side rotary component and described slave end rotary component and can carry out the Lock Part of movement relative to another one, circumferentially extend and be arranged on the recess of the arbitrary another one in described driving side rotary component and described slave end rotary component, and lock state and latch-release state can be switched to, wherein, described lock state is embedded in described recess by described Lock Part and described relative rotation phase is constrained in the state of the medium lock phase bit between full aduance phase place and maximum retardation angle phase place, described latch-release state is retired from office and the latch-release state of constraint relief from described recess by described Lock Part, and

Phase control division, it is when described middle locking framework switches to described lock state from described latch-release state, the travelling speed of the described relative rotation phase making from reference phase to described medium lock phase bit is slower than until be arranged on the travelling speed of the described relative rotation phase of the described reference phase between current phase place and described medium lock phase bit, the mode arriving described medium lock phase bit with described Lock Part controls the discharge to the supply of the fluid of described retardation angle room and the fluid from described advance angle room, or from the supply of the discharge of the fluid of described retardation angle room and the fluid to described advance angle room.

2. valve opening/closing timing control device according to claim 1, is characterized in that,

Described phase control division according to the slack-off mode of fixing variable quantity, controls the one among the supply to the fluid of described retardation angle room and the discharge from the fluid of described advance angle room and the discharge from the fluid of described retardation angle room and the supply to the fluid of described advance angle room with the travelling speed of the described relative rotation phase from described current phase place to described medium lock phase bit.

3. valve opening/closing timing control device according to claim 1 and 2, is characterized in that,

Described phase control division based on by the described relative rotation phase from described current phase place to described medium lock phase bit travelling speed and represent the mapping of relation defined of quantity of state of state of the fluid to described retardation angle room and described advance angle room, control the one among the supply to the fluid of described retardation angle room and the discharge from the fluid of described advance angle room and the discharge from the fluid of described retardation angle room and the supply to the fluid of described advance angle room.

4. valve opening/closing timing control device according to any one of claim 1 to 3, is characterized in that,

Judgement phase place is provided with between described medium lock phase bit and described reference phase, described valve opening/closing timing control device also possesses the detection unit whether described Lock Part of judgement arrives described judgement phase place, described detection unit implements the discharge to the supply of the fluid of described retardation angle room and the fluid from described advance angle room at described phase control division, with the discharge of the fluid from described retardation angle room and to the one among the supply of the fluid of described advance angle room control after, when the mode moving to described judgement phase place with described Lock Part has carried out control, judge whether described Lock Part arrives described judgement phase place.

5. valve opening/closing timing control device according to any one of claim 1 to 4, is characterized in that,

Described relative rotation phase moves based on the first travelling speed from described current phase place to described reference phase, and moves based on the second travelling speed being slower than described first travelling speed to described medium lock phase bit from described reference phase.