CN105599600A - A power transmission device for a vehicle - Google Patents

Abstract

The invention provides a power transmission device for a vehicle, which can improve the start response when a vehicle restarts after stop. In the power transmission device for a vehicle with a crank type power transmission unit, if a stop intention detection unit detects the stop intention of a driver in decelerating running of the vehicle, a start resistance calculating unit calculates the start resistance of the vehicle and an offset control unit controls the offset of an eccentric disc in a range of greater than zero and less than a value generating an output torque basically equal to the start resistance in a period from the detection of the stop intention to the detection of the start intention of the driver by a start intention detection unit. Thus, while the stop state of the vehicle is maintained, the offset can be increased in advance, and the delay for increase of the offset to a necessary value is reduced at the moment of vehicle start, so that the start response is improved. The offset is increased from the decelerating running of the vehicle, so that even the vehicle is restarted after being just stopped, the start response is improved.

Description

Power transmission apparatus for vehicle

Technical field

The present invention relates to power transmission apparatus for vehicle, wherein, by after the rotation speed change of the power shaft being connected with drive sourceThe power transfer unit that is passed to output shaft possesses: input side fulcrum, it is with respect to the bias of the axis of described power shaftMeasure variablely, and this input side fulcrum rotates together with this power shaft; One-way clutch, it is connected with described output shaft;Outlet side fulcrum, it is arranged at the exterior part of described one-way clutch; Connecting rod, it makes two ends and described input side fulcrumBe connected and move back and forth with described outlet side fulcrum; And shifting actuator, it props up for changing described input sideThe offset of point.

Background technology

Possessing in the power transmission apparatus for vehicle of this crank-type power transfer unit, according to following patent documentation 1Known such device: when not carrying out throttle operation and carried out brake operating under the state of vehicle stop, be judged asDriver have stop the meaning, by the offset of the eccentric disc of power transfer unit is set as to zero, by power transmissionThe friction of unit suppresses, for irreducible minimum, to realize the raising of fuel efficiency.

Patent documentation 1: TOHKEMY 2013-61043 communique

, in above-mentioned technology in the past, under the state of vehicle stop, do not carry out brake operating and carried out throttleWhen operation, be judged as driver and there is the starting meaning, the offset of the eccentric disc of power transfer unit is increased to from zeroThe value of regulation is so that vehicle start still, cannot be avoided such situation: make eccentric disc by shifting actuatorBefore being increased to the value of regulation from zero, can there is time delay in offset, therefore, exist vehicle starting response reducePossibility.

Summary of the invention

The present invention completes in view of aforesaid problem, its object is, is possessing crank-type power transfer unitIn power transmission apparatus for vehicle, improve the starting response recur step after vehicle stop time.

In order to reach above-mentioned purpose, the invention of recording according to technical scheme 1, has proposed a kind of vehicle power and has transmittedDevice, wherein, will be passed to the power transfer unit tool of output shaft after the rotation speed change of the power shaft being connected with drive sourceStandby: input side fulcrum, its offset with respect to the axis of described power shaft is variable, and this input side fulcrum and this is defeatedEntering axle rotates together; One-way clutch, it is connected with described output shaft; Outlet side fulcrum, it is arranged at described unidirectionalOn the exterior part of clutch; Connecting rod, its two ends are connected and carry out past with described input side fulcrum and described outlet side fulcrumReciprocating cutter; And shifting actuator, it changes the offset of described input side fulcrum, and described vehicle fills with power transmissionPut and be characterised in that, this power transmission apparatus for vehicle possesses: stop the detecting unit that looks like, it detects stopping of driverThe only meaning; Starting meaning detecting unit, it detects driver's the starting meaning; Breakaway force computing unit, its calculatingThe breakaway force of vehicle; And offset control module, it drives described shifting actuator to control described offset,If described in the detecting unit that stops looking like in the Reduced Speed Now of vehicle, detect driver's the meaning that stops, to connecingDuring till the starting that the described starting meaning detecting unit that gets off detects driver looks like, described breakaway force is calculatedUnit calculates the breakaway force of vehicle, and, described offset control module by described offset be controlled at than zero large andIn the little scope of the value that produces the output torque suitable with described breakaway force.

In addition, the invention of recording according to technical scheme 2, has proposed a kind of power transmission apparatus for vehicle, its featureBe, on the basis of the structure of technical scheme 1, the brake switch of operation of brake pedal disconnects when detecting orAccelerator open degree is during from zero increase, and described starting meaning detecting unit is judged as driver and has the starting meaning.

In addition, the invention of recording according to technical scheme 3, has proposed a kind of power transmission apparatus for vehicle, its featureBe, on the basis of the structure of technical scheme 1 or technical scheme 2, when detecting and drive in the Reduced Speed Now at vehicleThe person of sailing stop looking like time the described control undertaken by described offset control module be make described offset with as orderThe consistent control of offset is prepared in the starting of scale value, and offset large and ratio generation and described starting than zero prepared in described startingThe value of the output torque that resistance is suitable is little, carries out this control in the Reduced Speed Now of vehicle.

In addition, the invention of recording according to technical scheme 4, has proposed a kind of power transmission apparatus for vehicle, its featureBe, on the basis of the structure of technical scheme 3, make described offset and described starting prepare the consistent control of offsetDuring till vehicle stop, complete.

In addition, the invention of recording according to technical scheme 5, has proposed a kind of power transmission apparatus for vehicle, its featureBe, on the basis of the structure of technical scheme 4, when vehicle is in the time stopping, described in described offset is maintainedOffset is prepared in starting.

And the eccentric disc 18 of embodiment is corresponding to input side fulcrum of the present invention, the pin 19c couple of embodimentShould be in outlet side fulcrum of the present invention, the engine E of embodiment is corresponding to drive source of the present invention.

According to the structure of technical scheme 1, in the time that input side fulcrum carries out eccentric rotary together with power shaft, one-way clutchThe exterior part of device is via connecting rod reciprocally swinging, and in the time that exterior part swings to a direction, one-way clutch engages, outsideWhen parts swing in the other direction, one-way clutch is removed and is engaged, and makes thus output shaft to a direction rotation. AsFruit is changed the offset of input side fulcrum by shifting actuator, the stroke moving back and forth of connecting rod changes, phase therewithCompanion, the stroke of the reciprocally swinging of exterior part changes, and gear ratio is changed thus.

Power transmission apparatus for vehicle possesses: stop the detecting unit that looks like, it detects driver's the meaning that stops; StartingMeaning detecting unit, it detects driver's the starting meaning; Breakaway force computing unit, it calculates the starting resistance of vehiclePower; And offset control module, it drives shifting actuator to control offset, if stop the detecting unit that looks likeIn the Reduced Speed Now of vehicle, detect driver's the meaning that stops, detecting to next starting meaning detecting unitDuring going out till driver's the starting meaning, breakaway force computing unit calculates the breakaway force of vehicle, and, partiallyHeart amount control module is controlled at offset larger and less than the value that produces the output torque suitable with breakaway force than zeroIn scope. Thus, can maintain the halted state of vehicle while make in advance offset increase, in the time of vehicle startThe time delay being increased to till necessary value to offset reduces, and starting response improves. And, due to from vehicle decelerationWhile travelling, work the increase of carrying out offset, therefore, even the in the situation that of just starting after vehicle just stops, also canRealize the raising of starting response.

In addition, according to the structure of technical scheme 2, when the brake switch of the operation that detects brake pedal disconnects or oilDoor aperture is during from zero increase, and starting meaning detecting unit is judged as driver and has the starting meaning, therefore, and can be suitableGround judges driver's the starting meaning.

In addition, according to the structure of technical scheme 3,4, when detecting stopping of driver in the Reduced Speed Now at vehicleWhen the meaning, in the Reduced Speed Now of vehicle, make described offset and the starting as desired value prepare offset consistentControl, and in during till vehicle stop, complete this control, it is larger and compare than zero that offset is prepared in described startingThe value that produces the output torque suitable with breakaway force is little, therefore, ensured the moment of vehicle stop offset becomeOffset is prepared in starting, has improved the starting response in the situation that vehicle being started to walk after just stopping.

In addition, according to the structure of technical scheme 5, when vehicle is in the time stopping, described offset is maintained described risingStep is prepared offset, the starting response therefore can guarantee vehicle start time.

Brief description of the drawings

Fig. 1 is the skeleton drawing of power transmission apparatus for vehicle.

Fig. 2 is the details drawing of 2 of Fig. 1.

Fig. 3 is along the cutaway view of the 3-3 line of Fig. 2 (OD state).

Fig. 4 is along the cutaway view of the 3-3 line of Fig. 2 (GN state).

Fig. 5 is the Action Specification figure under OD state.

Fig. 6 is the Action Specification figure under GN state.

Fig. 7 is the figure that the structure of the electronic control unit of offset control device is shown.

Fig. 8 is the flow chart that effect is described.

Fig. 9 is the sequential chart that effect is described.

Figure 10 is the significant points details drawing of the sequential chart of Fig. 9.

Label declaration

11: power shaft;

12: output shaft;

14: shifting actuator;

18: eccentric disc (input side fulcrum);

19: connecting rod;

19c: pin (outlet side fulcrum);

21: one-way clutch;

22: exterior part;

E: engine (drive source);

M1: stop the detecting unit that looks like;

M2: starting meaning detecting unit;

M3: breakaway force computing unit;

M4: offset control module;

U: power transfer unit;

ε: offset.

Detailed description of the invention

Below, based on Fig. 1～Figure 10, embodiments of the present invention are described.

As shown in FIG. 1 to 3, by the driving force of engine E through the axletree 10,10 of left and right be passed to driving wheel W,The power transmission apparatus for vehicle of W possesses crank type buncher T and differential mechanism D. Present embodiment steplessSpeed changer T is that power transfer unit U vertically by multiple (being 4 in embodiment) with same structureCoincidence forms, and these power transfer units U possesses the shared power shaft 11 of configuration abreast and shared outputAxle 12, being rotated in of power shaft 11 slowed down or accelerate after be passed to output shaft 12.

Next, based on Fig. 2～Fig. 6, the structure of buncher T is described.

First,, as representative, the structure of a power transfer unit U is described. Be connected with engine E andThe power shaft 11 of rotation is relatively to rotate mode freely revolving in the hollow of the such shifting actuator 14 of electro-motorThe inside of rotating shaft 14a is run through. The rotor 14b of shifting actuator 14 is fixed on rotating shaft 14a, and stator 14c is fixed onHousing. The rotating shaft 14a of shifting actuator 14 can rotate with the speed identical with power shaft 11, and can phaseRelatively rotate with different speed for power shaft 11.

On the power shaft 11 of rotating shaft 14a that runs through shifting actuator 14, be fixed with the 1st pinion 15, crankThe planet carrier 16 of shape is connected in the rotating shaft 14a of shifting actuator 14 to cross over the mode of the 1st pinion 15.Diameter 2 2nd pinions 17,17 identical with the 1st pinion 15 are respectively by pinion pin 16a, 16a quiltBeing bearing in cooperates with the 1st pinion 15 forms the position of equilateral triangle, gear ring 18a and these the 1st pinion 15 HesThe 2nd pinion 17,17 engagement, described gear ring 18a be formed in eccentric mode circular plate type eccentric disc 18 inPortion. The ring portion 19b arranging in one end of the 19a of bar portion of connecting rod 19 by ball bearing 20 relatively to rotate side freelyFormula is embedded in the outer peripheral face of eccentric disc 18.

The one-way clutch 21 that is located at the periphery of output shaft 12 possesses: the exterior part 22 of ring-type, it is by pin 19cBe supported on the 19a of bar portion of connecting rod 19 by pivotable; Inner part 23, it is disposed at the inside of exterior part 22, and is fixed onOutput shaft 12; And roller 25, it is configured in the space that is formed at the wedge-like between exterior part 22 and inner part 23,And engaged spring 24 application of forces.

Known according to Fig. 2,4 power transfer unit U share the planet carrier 16 of crank-like, through the 2nd pinion 17,17 phase places that are supported on the eccentric disc 18 on planet carrier 16 differ respectively 90 ° in each power transfer unit U.For example, in Fig. 2, the eccentric disc 18 of the power transfer unit U of left end is displaced in figure with respect to power shaft 11Top, is displaced to figure with respect to power shaft 11 from the eccentric disc 18 of the 3rd power transfer unit U of left beginningBelow, is positioned at upper and lower from the eccentric disc 18,18 of the 2nd and the 4th power transfer unit U, U of left beginningTo centre.

Next, following such offset control device is described: recur step after vehicle stop time,The offset ε of the eccentric disc 18 of this offset control device control power transfer unit U improves starting response.

As shown in Figure 7, the offset control device being formed by electronic control unit have the detecting unit M1 that stops looking like,Starting meaning detecting unit M2, breakaway force computing unit M3 and offset control module M4. Detect the speed of a motor vehicleVehicle speed sensor Sa, detect brake pedal operation brake switch Sb and detect the accelerator open degree of accelerator open degreeSensor Sc is connected with the detecting unit M1 that stops looking like. Described brake switch Sb and described accelerator open degree sensorSc is connected with starting meaning detecting unit M2. Because breakaway force changes corresponding to the inclination angle of car body, therefore,On breakaway force computing unit M3, be connected with the slant angle sensor Sd at the inclination angle of detecting car body. Offset controlUnit M4 processed controls the action of shifting actuator 14, thereby controls the offset ε of eccentric disc 18.

Next, the effect of the embodiments of the present invention that possess said structure is described.

First, the effect of buncher T power transfer unit U is described. If speed change is causedThe rotating shaft 14a of moving device 14 rotates relatively with respect to power shaft 11, and planet carrier 16 is around the axis of power shaft 11L1 rotation. Now, the center O of planet carrier 16, by the 1st pinion 15 and two the 2nd pinions 17,17The center of the equilateral triangle forming is around the axis L1 of power shaft 11 rotation.

Fig. 3 and Fig. 5 show the center O of planet carrier 16 and locate with respect to the 1st pinion 15 (being power shaft 11)In the state of the opposition side of output shaft 12, now, eccentric disc 18 becomes maximum with respect to the offset of power shaft 11,The gear ratio of buncher T becomes minimum OD (super gearratio) state. Fig. 4 and Fig. 6 show planet carrier16 center O is positioned at the shape of a side identical with output shaft 12 with respect to the 1st pinion 15 (being power shaft 11)State, now, eccentric disc 18 is zero with respect to the offset of power shaft 11, the gear ratio of buncher T becomes nothingLimit large GN (neutral gear) state.

Under the OD state shown in Fig. 5, if by engine E power shaft 11 is rotated and with power shaft 11Identical speed makes the rotating shaft 14a rotation of shifting actuator 14, power shaft 11, rotating shaft 14a, planet carrier16, the 1st pinion 15, two the 2nd pinions 17,17 and eccentric disc 18 under the state becoming one withCentered by power shaft 11, carry out eccentric rotary around counter clockwise direction (reference arrow A). At (A) warp from Fig. 5(B) that crosses Fig. 5 is to during the state rotation of Fig. 5 (C), and connecting rod 19 makes the end quilt at the 19a of its bar portionThe exterior part 22 of pin 19c pivotable supporting is around counterclockwise (reference arrow B) rotation, the wherein ring of this connecting rod 19The 19b of portion is rotatably freely supported on the periphery of eccentric disc 18 relatively by ball bearing 20. (A) and Fig. 5 of Fig. 5(C) show the two ends along described arrow B direction rotation of exterior part 22.

Like this, when exterior part 22 is during along arrow B direction rotation, the exterior part 22 of the engaging-in one-way clutch 21 of roller 25And the space of the wedge-like between inner part 23, thereby the rotation of exterior part 22 is passed to output by inner part 23Axle 12, therefore, output shaft 12 is around counterclockwise (reference arrow C) rotation.

If power shaft 11 and the 1st pinion 15 are further rotated, gear ring 18a and the 1st pinion 15 andThe eccentric disc 18 of 2 pinion 17,17 engagements is around counter clockwise direction (reference arrow A) eccentric rotary. From Fig. 5(C) through Fig. 5 (D) to during the state rotation of Fig. 5 (A), connecting rod 19 makes the 19a in its bar portionEnd by (the reference arrow B ') rotation clockwise of the exterior part 22 of pin 19c pivotable supporting, wherein this connectsThe ring portion 19b of bar 19 is rotatably freely supported on the periphery of eccentric disc 18 relatively by ball bearing 20. (C) of Fig. 5Show the two ends along described arrow B ' direction rotation of exterior part 22 with Fig. 5 (A).

Like this, when exterior part 22 is during along arrow B ' direction rotation, roller 25 on one side compressive engagement springs 24 on one side by fromThe space of the wedge-like between exterior part 22 and inner part 23 is released, and makes thus exterior part 22 with respect to inner part 23Skid, output shaft 12 does not rotate.

As described above, in the time of exterior part 22 reciprocating rotary, only have when the direction of rotation of exterior part 22 be side counterclockwiseDuring to (reference arrow B), output shaft 12 just rotates around counter clockwise direction (reference arrow C), therefore, and output shaft12 intermittent rotaries.

Fig. 6 is the figure that is illustrated in the effect while turning round buncher T under GN state. Now, due to power shaft11 position is consistent with eccentric disc 18 center, and therefore eccentric disc 18 is zero with respect to the offset of power shaft 11.If power shaft 11 is rotated and with the speed identical with power shaft 11, speed change is caused by engine E under this stateThe rotating shaft 14a rotation of moving device 14, power shaft 11, rotating shaft 14a, planet carrier 16, the 1st pinion 15,Two the 2nd pinions 17,17 and eccentric disc 18 under the state becoming one centered by power shaft 11 around contraryClockwise (reference arrow A) carries out eccentric rotary. , because the offset of eccentric disc 18 is zero, thereforeThe reciprocating stroke of connecting rod 19 is also zero, and output shaft 12 does not rotate.

Therefore, if drive shifting actuator 14 and by the set positions of planet carrier 16 at the OD of Fig. 3 state and figureBetween 4 GN state, can turn round with any gear ratio between infinitely great gear ratio and minimum gear ratio.

In buncher T, the phase place of the eccentric disc 18 of 4 power transfer unit U that are set up in parallel is wrong mutuallyOpen 90 °, therefore, alternately transmission of drive force of 4 power transfer unit U, in 4 one-way clutch 21Any one is inevitable in engagement state, can make thus output shaft 12 continuous rotations.

Next, the effect of the offset control device to the starting response for improving vehicle describes.

In the step S1 of the flow chart of Fig. 8, be less than and slow down/stop in the speed of a motor vehicle being detected by vehicle speed sensor SaThe accelerator open degree of judging the speed of a motor vehicle and brake switch Sb connection or detected by accelerator open degree sensor Sc, as 1 o'clock, stopsThe detecting unit M1 that only looks like is judged as vehicle in Reduced Speed Now and driver has and stops the meaning, at step S2In, the inclination angle of the car body of breakaway force computing unit M3 based on being detected by slant angle sensor Sd, calculatesThe breakaway force of vehicle. Then,, in step S3, offset control module M4 calculates for generation of compared with stepOffset is prepared in the starting of the eccentric disc 18 of the output torque that resistance is slightly little, and prepares offset as target taking this startingValue is controlled the offset of eccentric disc 18. Thus, in step S4, in the time of vehicle stop, eccentric disc 18 partiallyHeart amount ε is consistent with starting preparation offset, and connecting rod 19 is prepared offset with this starting and moved back and forth and makeOne-way clutch 21 engages, and has eliminated thus the pine of the power transfer path from output shaft 12 to driving wheel W, WMoving, and utilize the torsion etc. of power transmission member to accumulate the moment of torsion of regulation. , owing to preparing offset because of startingThe output torque producing is less than breakaway force, and therefore, the meaning that can not violate driver makes vehicle start.

In following step S5, when driver make vehicle start and by brake switch Sb disconnect or by throttleThe accelerator open degree that jaw opening sensor Sc detects is started from scratch while increasing, and starting meaning detecting unit M2 is judged as and drivesThe person of sailing has the starting meaning, and offset control module M4 makes the offset ε of eccentric disc 18 prepare offset from startingDuring to starting, needed offset ε increases, and output torque exceedes breakaway force thus, vehicle start.

Now, the offset ε that supposes to make eccentric disc 18 increases from zero needed offset ε during to starting, risesStep can postpone the amount corresponding with this time, still, according to present embodiment, looks like in the starting that detects driverIn the moment, offset ε has been increased to start to walk to prepare offset consistent, therefore can improve the starting response of vehicle.And the control that makes offset ε be increased to starting preparation offset is to carry out in the Reduced Speed Now of vehicle, therefore,Ensured this control of the moment of vehicle stop complete and offset ε become starting prepare offset, even if just stoppingAfter in situation about starting to walk, also can realize the raising of starting response.

Sequential chart based on Fig. 9 more specifically describes above-mentioned effect. Solid line is corresponding to present embodiment, dotted lineCorresponding to comparative example.

In the present embodiment representing at solid line, if the vehicle in Reduced Speed Now stops at moment t3, be so farThe engine that is only carrying out idle running stops by idle stop control at moment t4, if engine is in the momentThereby t5 due to the beginning of starting-up action start make engine speed increase, vehicle does not have to start to walk sluggishly and makes carSpeed increases. If the speed of a motor vehicle reduces in the Reduced Speed Now of vehicle, the offset ε of eccentric disc 18 is also correspondingGround reduces, and still, prepares offset if the moment t2 of offset ε before vehicle stop reaches starting, eccentricAmount ε is maintained starting preparation offset after this, is not reduced to zero.

From buncher T to driving wheel W, W, the output torque of output becomes zero the Reduced Speed Now of vehicle,The rising but the moment t1 before offset ε is maintained starting preparation offset starts from scratch, and stop at vehicleMoment t3 only becomes than the slightly little value of offset ε that produces the output torque suitable with breakaway force, and at vehicleIn the time stopping, being maintained this value. Thus, guaranteed the starting response of vehicle in the time that moment t5 starts to walk.

On the other hand, in the comparative example shown in dotted line, the moment t2 before the moment of vehicle stop t3, biasAmount ε vanishing, until the moment t4 that engine idle stops, offset ε just starts to prepare offset from zero to startingIncrease, therefore, even side by side make offset ε be increased to starting institute with the starting-up action of carrying out vehicle at moment t5The value needing, but because the loosening accumulation of the power transfer path in the downstream of buncher T makes the upper of output torqueRise and postpone, therefore, vehicle is in the late moment t6 starting of the moment t5 than original, and starting response reduces.

By offset ε being maintained to offset is prepared in starting and in the power transfer path in the downstream of buncher TIn to accumulate the principle of moment of torsion as follows.

In Figure 10 of the part details drawing as Fig. 9, connecting rod 19 is with corresponding with the offset ε of eccentric disc 18Stroke reciprocating, corresponding, exterior part 22 reciprocally swingings of one-way clutch 21. Exterior part 22 pastThe moving angular speed of physical pendulum is around zero and positive and negative variation, and the minimizing of its amplitude and offset ε reduces pro rata. Work as outsideThe angle of oscillation speed of the positive direction (direction of engagement of one-way clutch 21) of part 22 exceedes the anglec of rotation of output shaft 12When speed (with reference to dash area), one-way clutch 21 engages, and the moment of torsion of engine E transmits via output shaft 12To driving wheel W, W, therefore, at this part place, the power transmission between output shaft 12 and driving wheel W, WMoment of torsion has been accumulated in torsion by power transmission member in path etc.

In comparative example, do not carry out before vehicle stop, offset ε being maintained the control of starting preparation offset,Therefore, the angle of oscillation speed of the positive direction of exterior part 22 can not exceed the angular velocity of rotation of output shaft 12, thereby can notAccumulate moment of torsion. On the other hand, in the present embodiment, carry out before vehicle stop, offset ε being maintained starting accurateThe control of standby offset, therefore, the angle of oscillation speed of the positive direction of exterior part 22 intermittently exceedes output shaft 12Angular velocity of rotation, thereby in the power transfer path between output shaft 12 and driving wheel W, W, accumulated moment of torsion.

And, in the time that the offset ε of eccentric disc 18 is increased to starting preparation offset, even if engine E stops alsoCan make connecting rod 19 move back and forth and accumulate moment of torsion. Its reason be because: when for make offset ε increase and driveWhen shifting actuator 14, eccentric disc 18 carries out eccentric rotary on one side around power shaft 11 makes offset ε on one sideIncrease, therefore, thereby connecting rod 19 is moved back and forth one-way clutch 21 is engaged by this eccentric rotary, defeatedShaft 12 rotates and accumulates moment of torsion.

Above, embodiments of the present invention are illustrated, but the present invention can be not departing from the scope of its main pointsCarry out various design alterations.

For example, in embodiment, starting is prepared to offset and be set as turning round than producing the output suitable with breakaway forceThe slightly low value of offset ε of square, is set in than zero large and ratio generation and breakaway force but starting can be prepared to offsetIn the little scope of the offset ε of suitable output torque.

Claims (5)

1. a power transmission apparatus for vehicle, wherein,

The power of output shaft (12) will be passed to after the rotation speed change of the power shaft (11) being connected with drive source (E)Transfer unit (U) possesses:

Input side fulcrum (18), its offset (ε) with respect to the axis of described power shaft (11) is variable, and shouldInput side fulcrum (18) rotates together with this power shaft (11);

One-way clutch (21), it is connected with described output shaft (12);

Outlet side fulcrum (19c), it is arranged on the exterior part (22) of described one-way clutch (21);

Connecting rod (19), its two ends are connected and enter with described input side fulcrum (18) and described outlet side fulcrum (19c)Row moves back and forth; And

Shifting actuator (14), it changes the offset (ε) of described input side fulcrum (18),

Described power transmission apparatus for vehicle is characterised in that,

This power transmission apparatus for vehicle possesses: the detecting unit (M1) that stops looking like, it detects driver's the meaning that stopsThink; Starting meaning detecting unit (M2), it detects driver's the starting meaning; Breakaway force computing unit (M3),It calculates the breakaway force of vehicle; And offset control module (M4), it drives described shifting actuator (14)Control described offset (ε),

If described in the detecting unit (M1) that stops looking like in the Reduced Speed Now of vehicle, detect driver's the meaning that stopsThink, the phase till extremely next described starting meaning detecting unit (M2) detects driver's the starting meaningBetween, described breakaway force computing unit (M3) calculates the breakaway force of vehicle, and, described offset control listDescribed offset (ε) is controlled at the output torque larger and more suitable with described breakaway force than generation than zero by unit (M4)The little scope of value in.

2. power transmission apparatus for vehicle according to claim 1, is characterized in that,

When detecting that the brake switch (Sb) of operation of brake pedal disconnects or accelerator open degree during from zero increase, described inStarting meaning detecting unit (M2) is judged as driver and has the starting meaning.

3. according to claim 1 or power transmission apparatus for vehicle claimed in claim 2, it is characterized in that,

When in the Reduced Speed Now at vehicle, detect driver stop looking like time by described offset control module (M4)The described control of carrying out is to make described offset (ε) prepare the consistent control of offset with the starting as desired value,It is larger and less than the value that produces the output torque suitable with described breakaway force than zero that offset is prepared in described starting, at vehicleReduced Speed Now in carry out this control.

4. power transmission apparatus for vehicle according to claim 3, is characterized in that,

Make described offset (ε) and described starting prepare consistent being controlled to during till vehicle stop of offsetInside complete.

5. power transmission apparatus for vehicle according to claim 4, is characterized in that,

When vehicle is in the time stopping, described offset (ε) is maintained described starting and prepares offset.