CN1831385B - Control device of locking clutch for vehicle - Google Patents
Control device of locking clutch for vehicle Download PDFInfo
- Publication number
- CN1831385B CN1831385B CN2005100537188A CN200510053718A CN1831385B CN 1831385 B CN1831385 B CN 1831385B CN 2005100537188 A CN2005100537188 A CN 2005100537188A CN 200510053718 A CN200510053718 A CN 200510053718A CN 1831385 B CN1831385 B CN 1831385B
- Authority
- CN
- China
- Prior art keywords
- vehicle
- clutch
- lock
- separation
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000926 separation method Methods 0.000 claims abstract description 117
- 230000007704 transition Effects 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 54
- 230000008859 change Effects 0.000 claims description 42
- 239000012530 fluid Substances 0.000 claims description 27
- 238000003825 pressing Methods 0.000 claims description 13
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 18
- 230000000875 corresponding effect Effects 0.000 description 14
- 230000001276 controlling effect Effects 0.000 description 12
- 239000004519 grease Substances 0.000 description 11
- 239000000446 fuel Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 7
- 238000004378 air conditioning Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000013507 mapping Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 230000002596 correlated effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
Landscapes
- Control Of Fluid Gearings (AREA)
Abstract
The present invention provides a vehicle locking clutch control device for inhibiting the separation deviation of the locking clutch caused by impact independent of vehicle deceleration states so as to improve running performance. Because an initial separation pressure setting unit (108) sets initial separation pressure PLUF according to the inertia moment outputted from an engine (12) as decelerating, and the separation pressure gets smaller with the increasing of the inertia moment, it can inhibit deviation of the locking clutch (26) as separating even though the necessary torque capacities of the locking clutch (26) are different because of different inertia moments of the engine caused by different deceleration states, so as to inhibit the separation deviation of the locking clutch (26) caused by the impact because of gear ratio setting before the vehicle stops, thus properly improving the running performance, where the PLUF is a set hydraulic pressure in the transition of switching the locking clutch (26) from engaging state to disengaging state by a locking-separating unit (104) as decelerating.
Description
Technical field
The present invention relates to a kind of vehicle fluid transmission means with lock-up clutch of direct binding motor and automatic transmission, particularly, relating to a kind of raising makes above-mentioned lock-up clutch enter the technology of the rideability the Control work of separated state from jointing state in the vehicle deceleration process.
Background technique
Having vehicle is known with the vehicle of fluid transmission means, and wherein said vehicle has the lock-up clutch of direct binding motor and automatic transmission with fluid transmission means.For example, disclosed vehicle comes to this in the patent documentation 1, in such vehicle, for fluid transmission means via the transmission of power of fluid (promptly, the lock-up clutch composition is opened (OFF) state from the locking of state), by making lock-up clutch become jointing state (following locking closure (ON) state that also is expressed as sometimes) directly to link motor and automatic transmission improves transmission efficiency.And, in the Reduced Speed Now process of above-mentioned vehicle, for example at the inertia traveling of having closed throttle or closure fully, be that what is called slides in the process, by entering the locking closed state rotation of driving wheel is passed to motor, thereby impel engine rotary speed to follow the input rotational speed of automatic transmission, compare engine rotary speed with the locking open mode thus and be enhanced.By like this, the oil-break zone based on engine rotary speed that particularly suppresses control, the work of for example oil-break to engine oil in the Reduced Speed Now process is extended, thereby fuel efficiency rises.
In addition, the following output hydraulic command value of hydraulic control from the lock-up clutch of above-mentioned locking closed state to the switching transitional period of locking open mode, make shown in Figure 10 of above-mentioned patent documentation 1 (c), hydraulic pressure becomes the predetermined joint of jointing state to press, for example engage fully to press to quickly fall to and separate initial the pressure from making lock-up clutch, then, reduce to gradually and make the predetermined disjoining pressure of described lock-up clutch composition from state.At this moment, it is separated when following that in fact lock-up clutch becomes necessary torque capacity in actual torque capacity, wherein, described actual torque capacity is to reduce to the torque capacity of the reality of the lock-up clutch during the hydraulic pressure command of predetermined disjoining pressure gradually from separating initial pressure, and described necessary torque capacity is to be used to make lock-up clutch not produce the minimum torque capacity of slip.
Patent documentation 1: the Japanese documentation spy opens the 2001-56050 communique
But, since above-mentioned separation initial press be set as constant, so the actual separated separation of lock-up clutch constantly will change, thereby the disengaging time till actual separation may produce very big deviation.Its reason is: engine rotary speed reduces, is the rotation decline of engine crankshaft along with the deceleration of vehicle under the locking closed state, and along with the minimizing of described engine rotary speed from the inertia torque of the engine crankshaft system of motor output according to the difference of the retardation (the perhaps slip of engine rotary speed) of vehicle and difference, therefore, be used to the necessary torque capacity difference that makes lock-up clutch reality not separated.For example, if will be made as positive side to a side of lock-up clutch input from motor, then when vehicle deceleration is big, inertia torque becomes big to positive side, engine torque (in other words, from live axle through automatic transmission and based on the current gear of described automatic transmission than the torque that is input to the lock-up clutch) under the engine braking state, be negative torque, so the absolute value of the necessary torque capacity of lock-up clutch diminishes.
Therefore, if the retardation difference of vehicle, then in identical hydraulic command value, promptly constant separation initial depression, the actual separated separation of lock-up clutch is constantly with difference, thus as mentioned above, the disengaging time to lock-up clutch reality till separated has deviation.Therefore, setting according to shift cable, speed change before promptly stopping according to vehicle is recently seen, gear ratio is different along with the above-mentioned separation moment, thereby difference is impacted along with the difference of vehicle deceleration state in the separation when the locking closed state becomes the locking open mode, and then may worsen rideability, wherein said shift cable is in order to control before vehicle stops, and promptly drives to the gear ratio of automatic transmission of vehicle stopping period and storage in advance from vehicle deceleration.
Summary of the invention
The present invention is that background is finished with above-mentioned situation, its purpose is to provide a kind of control gear of lock-up clutch for vehicle, it is used for having the vehicle fluid transmission means of the lock-up clutch of direct binding motor and automatic transmission, described control gear can irrespectively suppress the deviation of separating impact of lock-up clutch when jointing state becomes separated state with the deceleration regime of vehicle different, and then improves rideability.
The aim of first scheme in order to achieve the above object is a kind of control gear of lock-up clutch for vehicle, it is used for having the vehicle fluid transmission means of the lock-up clutch of direct binding motor and automatic transmission, described control gear has when deceleration locking separative element, when when vehicle deceleration travels, making described lock-up clutch become the switching transition period of separated state from jointing state, locking separative element output hydraulic pressure command during described deceleration, this hydraulic pressure command makes after the predetermined joint pressure that makes described lock-up clutch become jointing state drops to the initial pressure of separation rapidly, reduce to the predetermined disjoining pressure that becomes separated state gradually, wherein, described control gear comprises that (a) separates the initial setup unit of pressing, and initially press according to setting described separation along with the Reduced Speed Now of described vehicle from the inertia torque of motor output this unit.
The aim of alternative plan in order to achieve the above object is a kind of control gear of lock-up clutch for vehicle, it is used for having the vehicle fluid transmission means of the lock-up clutch of direct binding motor and automatic transmission, described control gear has when deceleration locking separative element, when when vehicle deceleration travels, making described lock-up clutch become the switching transition period of separated state from jointing state, locking separative element output hydraulic pressure command during described deceleration, this hydraulic pressure command makes after the predetermined joint pressure that makes described lock-up clutch become jointing state drops to the initial pressure of separation rapidly, reduce to the predetermined disjoining pressure that becomes separated state gradually, wherein, described control gear comprises that (a) separates the initial setup unit of pressing, and the relevant retardation relevant parameter of vehicle deceleration when this unit basis is travelled with described vehicle deceleration is set the described initial pressure of separating.
In addition, the aim of third party's case is the control gear as the described lock-up clutch for vehicle of alternative plan, wherein, described separation initially presses setup unit to press the just big more relation of storage in advance from the more little separation of retardation is initial, determines that based on described retardation parameter described separation initially presses.
In addition, the aim of cubic case is as second or the control gear of the described lock-up clutch for vehicle of third party's case, wherein, described separation initially presses setup unit except according to the described retardation relevant parameter, also sets the described initial pressure of separating according to the input speed relevant parameter relevant with the input speed of described automatic transmission.
In addition, the aim of the 5th scheme is the control gear as the described lock-up clutch for vehicle of cubic case, wherein, described separation initially press setup unit from the more little separation of retardation initial press just big more and input speed more high score determine to press described the separation initially based on described retardation parameter and described input speed relevant parameter from the just low more relation of storage in advance of initial pressure.
In addition, the aim of the 6th scheme is the control gear as each described lock-up clutch for vehicle in second to the 5th scheme, wherein, the retardation of the described retardation relevant parameter inertia torque that is described motor, vehicle, engine speed change rate, output shaft relative speed variation or with these any parameter that changes in any.
In addition, the aim of the 7th scheme is the control gear as each described lock-up clutch for vehicle in the 4th to the 6th scheme, wherein, the rotating speed of the described input speed relevant parameter input speed that is described automatic transmission, described motor, turbine rotating speed, output shaft rotating speed or with these any parameter that changes in any.
The aim of all directions case in order to achieve the above object is a kind of control gear of lock-up clutch for vehicle, it is used for having the vehicle fluid transmission means of the lock-up clutch of direct binding motor and automatic transmission, described control gear has when deceleration locking separative element, when when vehicle deceleration travels, making described lock-up clutch become the switching transition period of separated state from jointing state, locking separative element output hydraulic pressure command during described deceleration, this hydraulic pressure command makes after the predetermined joint pressure that makes described lock-up clutch become jointing state drops to the initial pressure of separation rapidly, reduce to the predetermined disjoining pressure that becomes separated state gradually, wherein, described control gear comprises that (a) separates the initial setup unit of pressing, and the relevant relative speed variation relevant parameter of relative speed variation of the described motor when this unit basis is travelled with described vehicle deceleration is set the described initial pressure of separating.
In addition, the aim of the 9th scheme is the control gear as the described lock-up clutch for vehicle of all directions case, wherein, described separation initially presses setup unit to press the just big more relation of storage in advance from the more little separation of relative speed variation of motor is initial, determines that based on described relative speed variation relevant parameter described separation initially presses.
In addition, the aim of the tenth scheme is the control gear as the 8th or the 9th described lock-up clutch for vehicle of scheme, wherein, described separation initially presses setup unit to set the described initial pressure of separating according to described relative speed variation relevant parameter with the speed of a motor vehicle relevant parameter relevant with the actual vehicle speed of described vehicle.
In addition, the aim of the 11 scheme is the control gear as the described lock-up clutch for vehicle of the tenth scheme, wherein, described separation initially press setup unit from the more little separation of engine speed change rate initial press just big more and the speed of a motor vehicle more high score determine to press described the separation initially based on described relative speed variation relevant parameter and speed of a motor vehicle relevant parameter from the just low more relation of storage in advance of initial pressure.
In addition, the aim of the 12 scheme is the control gear as each described lock-up clutch for vehicle in the 8th to the 11 scheme, wherein, the retardation of the described relative speed variation relevant parameter inertia torque that is described motor, vehicle, engine speed change rate, output shaft relative speed variation or with these any parameter that changes in any.
In addition, the aim of the 13 scheme is the control gear as each described lock-up clutch for vehicle in the 8th to the 12 scheme, wherein, the rotating speed of the described speed of a motor vehicle relevant parameter input speed that is described automatic transmission, described motor, turbine rotating speed, output shaft rotating speed or with these any parameter that changes in any.
According to first, second, the control gear of each lock-up clutch for vehicle of the present invention in the case of all directions, when vehicle deceleration travels, since by separate initial press setup unit according to along with described Reduced Speed Now from the inertia torque of motor output or the relevant parameter of inertia torque of engine crankshaft system, engine speed change rate when vehicle deceleration when for example vehicle deceleration travels or vehicle deceleration travel, perhaps relevant with these parameter is set and is separated initial pressure, even so along with the difference of the inertia torque of engine crankshaft system and the necessary torque capacity difference of lock-up clutch, also can suppress the actual separated separation of lock-up clutch deviation constantly, the initial pressure of wherein said separation is that the locking separative element becomes the switching transitional period of separated state lock-up clutch from jointing state by deceleration the time, is used for making the predetermined joint from making lock-up clutch become jointing state to press the setting hydraulic pressure that descends rapidly.Thus, with because the inertia torque of the different engine crankshaft systems that bring of vehicle deceleration state different, promptly have nothing to do with the different of relevant parameter of this inertia torque, can make as the time till lock-up clutch is actual separated, be that disengaging time is stable, thereby the deviation that the separation that has suppressed lock-up clutch is impacted, and then suitably improved rideability.
In addition, in the described invention of cubic case, owing to initially press setup unit by described separation, except according to the described vehicle deceleration relevant parameter, also set the described initial pressure of separating according to the parameter relevant, so the different of negative torque owing to the different motors that bring of the parameter of being correlated with the input speed of described automatic transmission more correctly can be reflected in the necessary torque capacity with the input speed of described automatic transmission.
In addition, in the described invention of the tenth scheme, owing to initially press setup unit by described separation, except according to the described relative speed variation relevant parameter, also set the described initial pressure of separating according to the parameter relevant, so the different of negative torque owing to the different motors that bring of the parameter of being correlated with the described speed of a motor vehicle more correctly can be reflected in the necessary torque capacity with the actual vehicle speed of described vehicle.
Description of drawings
Fig. 1 is a transmission device for vehicle synoptic diagram of using the control gear of lock-up clutch of the present invention;
Fig. 2 is the block diagram of control system that is used for the transmission device for vehicle of explanatory drawing 1;
Fig. 3 is the figure that is illustrated in an example of the speed change mapping of using when obtaining target rotational speed in the speed Control of variable v-belt drive;
Fig. 4 is the figure of an example of the locking curve that uses when being illustrated in the working state of control lock-up clutch;
Fig. 5 is the figure of expression as an example of the locking control device of the hydraulic control circuit part relevant with the control of lock-up clutch, and described locking control device is the pith of the hydraulic control circuit that transmission device for vehicle had of Fig. 1;
Fig. 6 is the figure of an example of the hydraulic pressure command of expression lock-up clutch when jointing state becomes separated state;
Fig. 7 be used for explanatory drawing 2 electric control device had carries out the functional block diagram of major component of control function of the control of lock-up clutch when vehicle deceleration travels;
Fig. 8 is vehicle deceleration of storing in advance and the schematic representation that concerns that separates initial pressure;
Fig. 9 is the flow chart of Control work major component that is used for the electric control device of explanatory drawing 2,
The major component of described Control work promptly is that the working state of lock-up clutch when vehicle deceleration travels is from the Control work of jointing state when separated state is switched;
Figure 10 is used for the working state of lock-up clutch of explanatory drawing 9 from the sequential chart of the Control work of jointing state when separated state is switched;
Figure 11 is the figure that represents an engine rotary speed variance ratio of storing in advance and an example that separates initial relation of pressing, and is the figure suitable with Fig. 8;
Figure 12 is another embodiment's the flow chart of Control work major component that is used for the electric control device of explanatory drawing 2, the major component of described Control work promptly be the working state of lock-up clutch when vehicle deceleration travels from the Control work of jointing state when separated state is switched, this figure is the figure suitable with Fig. 9:
Figure 13 is that the setting of using when being used for the separating controlling of electric control device had when carrying out vehicle deceleration and travel lock-up clutch of explanatory drawing 2 separates the functional block diagram of initial control function major component of pressing;
Figure 14 is the flow chart of Control work major component that is used for the electric control device of explanatory drawing 2, the major component of described Control work promptly be lock-up clutch is become use in the Control work of separated state, separate initial Control work when pressing the study disengaging time to set change to separate initial the pressure by making.
Embodiment
Below, describe embodiments of the invention in detail with reference to accompanying drawing.
Fig. 1 is the synoptic diagram of transmission device for vehicle 10 of having used the control gear of lock-up clutch of the present invention.Described transmission device for vehicle 10 is transverse automatic transmission, is suitable for most in FF (preposition engine, front-wheel drive) the type vehicle, and has the motor 12 of actuating force source as the usefulness of travelling.The output of the motor 12 that is made of internal-combustion engine is from the bent axle 13 of motor 12, be passed to differential gearing 22 as the fluid torque converter 14 of fluid transmission means via forward-reverse switching device 16, input shaft 36, variable v-belt drive (CVT) 18, reduction gearing 20, thereby is assigned to left and right sidesing driving wheel 24L, 24R.By above-mentioned fluid torque converter 14, forward-reverse switching device 16, constitute driving mechanism as variable v-belt drive 18 of automatic transmission etc.
Have electronic control air throttle 80 in the suction tude 31 of motor 12, described electronic control air throttle 80 uses the suction air quantity of not shown throttle actuator electric control motor 12.By carrying out the open and close controlling of above-mentioned electronic control air throttle 80 and fuel injection control etc. according to accelerator open degree Acc etc. by electric control device 60 (referring to Fig. 2), thereby carry out the increase and decrease control of the output of motor 12, wherein said accelerator open degree Acc is the throttle operation amount of expression driver's output request amount.
Forward-reverse switching device 16 constitutes based on dual planetary gear type planetary gear system, the impeller arbor 34 and the sun gear 16s of fluid torque converter 14 connect to one, the input shaft 36 and the carriage 16c of variable v-belt drive 18 connect to one, on the other hand, carriage 16c and sun gear 16s link selectively via forward clutch C1, and ring gear 16r is fixed on the shell selectively via retreating break B1.Forward clutch C1 and retreat break B1 and be equivalent to chopper, be by oil hydraulic cylinder by the hydraulic type friction apply device of friction apply, separated by when forward clutch C1 is stuck, retreating break B1, forward-reverse switching device 16 is integral rotation status, thereby make the drive path of advancing set up (reaching), and then the driving force of direction of advance is passed to variable v-belt drive 18 1 sides, on the other hand, separated by forward clutch C1 when retreating break B1 and being stuck, forward-reverse switching device 16 makes and retreats drive path establishment (reaching), thereby input shaft 36 relative impeller arbor 34 opposite spins, and then the driving force of direction of retreat is passed to variable v-belt drive 18 1 sides.In addition, if forward clutch C1 and to retreat break B1 simultaneously separated, then forward-reverse switching device 16 is in the neutral gear (dissengaged positions) that cuts off transmission.
Variable v-belt drive 18 comprises that the variable input side variable pulley 42 of the effective diameter as the input side parts that is arranged on the above-mentioned input shaft 36 hangs over the drivign belt 48 of the function of the transmission part that plays rubbing contact on these variable pulleys 42,46 with variable outlet side variable pulley 46 and the volume of the effective diameter as the outlet side parts that is arranged on the above-mentioned output shaft 44, thereby carries out transmission by the frictional force between variable pulley 42,46 and the drivign belt 48. Variable pulley 42 and 46 comprises: fixedly revolving part 42a and 46a, and they are fixed on respectively on input shaft 36 and the output shaft 44; Removable revolving part 42b and 46b, they are configured to relative input shaft 36 and output shaft 44 can not be around the relative rotation of axle but can move axially; And input side oil hydraulic cylinder 42c and outlet side oil hydraulic cylinder 46c, apply the thrust that the V well width that makes between 42a and 42b and 46a and the 46b changes.The hydraulic pressure of the oil hydraulic cylinder by control input side variable pulley 42, two variable pulleys 42 and 46 V well width change, thereby have changed the working diameter (effective diameter) of driving belt 48, and then make gear ratio Y (=input rotational speed N
IN/ output rotational speed N
OUT) change continuously.
Fig. 2 is used to be illustrated as the motor 12 of control graph 1 or variable v-belt drive 18 etc. and the block diagram that is arranged at the control system on the vehicle, on electric control device 60, be connected with engine rotation speed sensor 62, turbine speed probe 64, transfer input shaft speed sensors 65, vehicle speed sensor 66, the throttle sensor 68 of band Idle Switch, cooling water temperature sensor 70, CVT oil temperature sensor 72, accelerator open degree sensor 74, pedal brake switch 76, bar level sensor 78, and air-conditioning switch 92 etc., thereby rotating speed (engine speed) N that represents motor 12 can be provided
E, impeller arbor 34 rotating speed (turbine rotating speed) N
T, input shaft 36 rotating speed (input shaft rotating speed) N
IN, vehicle velocity V, electronics air throttle 80 full-shut position (idling mode) and aperture (throttle opening) θ thereof
TH, motor 12 coolant water temperature T
W, variable v-belt drive 18 or lock-up clutch 26 etc. the oily temperature T of oil hydraulic circuit
CVT, as the accelerator open degree Acc of the operation amount of throttle operation parts such as gas pedal, as bar position (operating position) P of the having or not of the operation of the pedal brake of service brake, speed change lever 77
SII, and air-conditioning work signal such as have or not.The turbine rotational speed N
TWhen advancing of forward clutch C1 engaging travelled and input shaft rotating speed N
INUnanimity, the rotating speed of the output shaft 44 of vehicle velocity V and variable v-belt drive 18 (output shaft rotating speed) N
OUTCorresponding.In addition, accelerator open degree Acc represents driver's output request amount.In addition, above-mentioned bar level sensor 78 for example comprises a plurality of switches such as idle position detecting switch, activation point detecting switch, engine braking position detecting switch and car backing position detecting switch.
In addition, with regard to the speed Control of variable v-belt drive 18, electric control device 60 is that the predefined speed change mapping of parameter calculates input side rotating speed of target N from the throttle operation amount Acc of output request amount and vehicle velocity V with the expression driver for example as shown in Figure 3
IN *, and for making actual input shaft rotating speed N
INWith rotating speed of target N
IN *Unanimity is carried out the speed Control of variable v-belt drive 18 according to the deviation of these grades, promptly according to the work oil supplying of the oil hydraulic cylinder 42c of input side variable pulley 42, eject the control speed Control and press P
BELTThereby, gear ratio Y is changed continuously.The mapping of Fig. 3 is suitable with the speed change condition, and vehicle velocity V is more little and throttle operation amount Acc is big more, just can set the big rotating speed of target N of gear ratio Y more
IN *In addition, because vehicle velocity V and output shaft rotational speed N
OUTSo correspondence is as input shaft rotating speed N
INThe rotating speed of target N of desired value
IN *Corresponding with target change gear ratio, and in the scope of the minimum gear ratio Ymin of stepless speed variator 18 and maximum gear ratio Ymax, be determined.
In addition, lock-up clutch control with regard to lock-up clutch 26, can promptly engage power to the engaging torque of lock-up clutch 26 controls continuously, electric control device 60 has lock-up clutch control unit 100 on function, thereby for switching opening, closing and control locking electromagnetic element SL of lock-up clutch 26, wherein lock-up clutch control unit 100 is for example from as shown in Figure 4 with throttle
THAnd vehicle velocity V is that parameter is stored in advance, as to have separated region (locking opened areas) and engaging zone (locking enclosed region) marginal mapping (relation) and based on the throttle of reality
THAnd vehicle velocity V, the working state of control lock-up clutch 26.In addition, in the switching controls of opening, closing of lock-up clutch 26,, locking work piezoelectricity magnetic cell DSU is carried out load control, so that the working hydraulic pressure P of lock-up clutch 26 in order to suppress the engaging in the described switching controls or to separate and impact
LUCumulative or decrescence.In addition, the locking control example during Reduced Speed Now is as with throttle
THBe judged as zero value and carry out advancing when travelling of inertia traveling (Reduced Speed Now), make the turbine rotational speed N by engaging lock-up clutch 26
TWith engine speed N
ERoughly the reverse pumping of self-powered driving wheel one side in the future goes into to pass to motor 12 under the Yi Zhi state.Thus, engine speed N
ESlowly reduce along with vehicle deceleration.Make lock-up clutch 26 engagings if so, then because engine speed N
EBe enhanced the turbine rotational speed N
TSo, compare in the time of with the separating of lock-up clutch 26, stop the fuel feeding zone (vehicle speed range) of the fuel feeding of motor 12 extended, thereby fuel efficiency rises.
Fig. 5 is the schematic representation of an example of the conduct of expression hydraulic control circuit 86 oil hydraulic circuit partly the locking control device 200 relevant with the control of lock-up clutch 26, described locking control device 200 has locking control valve 250, thereby controls opening, closing of lock-up clutch.
Therefore, described electric control device 60 is used to control the hydraulic command value S of locking work piezoelectricity magnetic cell DSU and locking electromagnetic element SL in order to switch opening, closing of lock-up clutch 26 to hydraulic control circuit 86 outputs
PFig. 6 is the described hydraulic command value S of expression lock-up clutch 26 when jointing state becomes separated state
PAn example, the longitudinal axis is based on described hydraulic command value S
PThe working hydraulic pressure P of lock-up clutch 26
LUInstruction hydraulic pressure value.This instruction hydraulic pressure value is with corresponding as the target torque capacity of the target that is used to set actual torque capacity, and wherein actual torque capacity is the torque capacity of the reality of described lock-up clutch 26, in Fig. 6 with hydraulic command value S
PBe drawn as its size expression actual torque capacity.Thereby, according to this hydraulic command value S
PControl the actual torque capacity of lock-up clutch 26.According to Fig. 6, at t
SConstantly, control the work of described locking work piezoelectricity magnetic cell DSU and press P
DSUPress P with the work of described locking electromagnetic element SL
SL, so that the instruction hydraulic pressure value P of lock-up clutch 26 to press as predetermined joint
LUONBecome jointing state.Then, at t
SIf exported the separation command of lock-up clutch 26, then control described work and press P constantly
DSUPress P with described work
SL, make call instruction hydraulic pressure value drop to the initial P of pressure of separation rapidly
LUFAfterwards, reduce up to t gradually
EConstantly, to reach t
0The instruction hydraulic pressure value P of the predetermined disjoining pressure of conduct constantly
LUOFF, lock-up clutch 26 compositions are from state thus.But in fact as long as the above-mentioned actual torque capacity of lock-up clutch 26 is lower than the necessary torque capacity of lock-up clutch 26, then lock-up clutch 26 just begins separated.Therefore, as shown in Figure 6, as instruction hydraulic pressure value from separating initial pressure P
LUFBe reduced to instruction hydraulic pressure value P gradually as disjoining pressure
LUOFFDuring t
RConstantly, actual torque capacity will be lower than necessary torque capacity, thereby become the initial point of separating that described separation begins, and from t
SThe time be carved into t
RConstantly be that conduct is up to the lock-up clutch 26 reality disengaging time α of separated time.
Above-mentioned necessary torque capacity is to be used to minimum torque capacity that lock-up clutch 26 is not slided, by negative torque with along with engine speed N
EReduce and determine from the difference between the absolute value separately of the inertia torque of the engine crankshaft system of motor output, wherein, under the locking closed state of described negative torque when vehicle deceleration travels, and according to the turbine rotational speed N of going into from the reverse pumping of driving wheel
T(this moment and input speed N
INIdentical) quite, described engine speed N
EMinimizing take place along with vehicle deceleration.Thereby, owing to the inertia torque of the engine crankshaft system deceleration regime along with vehicle changes, thus described necessary torque capacity also change, and as based on above-mentioned hydraulic command value S
PSeparation initially press P
LUFConstant, then the separation of lock-up clutch 26 changes constantly, thereby above-mentioned separation point (representing the identical meaning with disengaging time α) also changes, and promptly described separation point will disperse according to the deceleration regime of vehicle.Therefore, according to determine vehicle stop before the setting of shift cable of speed change of automatic transmission of (driving to the vehicle stopping period) from vehicle deceleration, for example because in the variable v-belt drive 18 of present embodiment, for keeping or restarting engine speed N
E(perhaps input shaft rotating speed N
IN) and make gear ratio carry out speed Control along with vehicle stops preceding deceleration with increasing, so stop the difference of preceding above-mentioned separation point according to vehicle, gear ratio is got different settings, thereby the size that the separation when the locking closed state becomes the locking open mode is impacted is according to the difference of the deceleration regime of vehicle and difference, and then may worsen rideability.
Fig. 7 is the functional block diagram of major component that is used to illustrate the control function of the control of carrying out lock-up clutch 26 when vehicle deceleration travels that described electric control device 60 is had.In the drawings, travelling state reading unit 110 reads the travelling state of current vehicle from each sensor that vehicle had.For example, read rotating speed (engine speed) N of motor 12 from engine rotation speed sensor 62, turbine speed probe 64, transfer input shaft speed sensors 65, vehicle speed sensor 66, throttle sensor 68, throttle operation amount (aperture) sensor 74, bar level sensor 78, CVT oil temperature sensor 72, air-conditioning switch 92 etc.
E, impeller arbor 34 rotating speed (turbine rotating speed) N
T, input shaft 36 rotating speed (input shaft rotating speed) N
IN, vehicle velocity V, electronics air throttle 80 full-shut position and aperture (throttle opening) θ thereof
TH, throttle operation parts such as gas pedal operation amount be bar position (operating position) P of accelerator open degree Acc, speed change lever 77
SH, variable v-belt drive 18 or lock-up clutch 26 etc. the oily temperature T of oil hydraulic circuit
CVT, and air-conditioning have or not work etc.In addition, it is vehicle acceleration (also comprising retardation) Δ V that described travelling state reading unit 110 reads vehicle speed variation rate from above-mentioned vehicle velocity V, perhaps from above-mentioned engine speed N
ERead engine speed change rate Δ N
E
Lock-up clutch control unit 100 comprises locking separative element 104 when locking engaging unit 102 is with deceleration when slowing down, and to described hydraulic control circuit 86 output hydraulic command value S
P, so that control the working state of lock-up clutch 26 according to the predefined relation (mapping) shown in above-mentioned Fig. 4.In addition, to described hydraulic control circuit 86 output hydraulic command value S
P,,, and, make lock-up clutch 26 become separated state along with opening once again to the fuel feeding of motor 12 for expansion stops to make lock-up clutch 26 become jointing state to the oil-break zone of the fuel feeding of motor 12 so that when the Reduced Speed Now of vehicle.
P is pressed in the work of the described locking work piezoelectricity magnetic cell DSU of locking engaging unit 102 controls during above-mentioned deceleration
DSUPress P with the work of described locking electromagnetic element SL
SL,, make lock-up clutch 26 at the instruction hydraulic pressure value P that presses as predetermined joint so that when vehicle deceleration travels
LUONUnder become jointing state.
P is pressed in the work of the described locking work piezoelectricity magnetic cell DSU of locking separative element 104 controls during above-mentioned deceleration
DSUPress P with the work of described locking electromagnetic element SL
SL, so that vehicle deceleration is pressed P at predetermined joint when travelling
LUONThe working state of lock-up clutch that becomes jointing state down is at the instruction hydraulic pressure value P as predetermined disjoining pressure
LUOFFFollowing composition is from state.At described lock-up clutch 26 from jointing state to the transitional period that separated state is switched, locking separative element 104 as above-mentionedly make instruction hydraulic pressure value from predetermined joint pressure P shown in Figure 6 during deceleration
LUONQuickly fall to and separate the initial P of pressure
LUF, make it reduce to predetermined disjoining pressure P gradually afterwards
LUOFF
When locking engaging unit 102 makes lock-up clutch 26 be in jointing state during by above-mentioned deceleration when vehicle deceleration travels, locking separates whether judging unit 106 is that preset vehicle speed is such as below the 10km/h with vehicle velocity V for example, locking separative element 104 makes lock-up clutch 26 become the control of separated state when judging whether to begin by above-mentioned deceleration, promptly whether can begin to make lock-up clutch 26 become the control of separated state, so that when decelerating to of vehicle stops, making motor 12 with the idling speed fast rotational.Can be according to the information of motor 12, and change described preset vehicle speed based on the rotating speed that motor 12 can rotation, also can change described preset vehicle speed, thereby perhaps can also change described preset vehicle speed according to the situation whether the oil-break end-of-job will begin fuel feeding once more based on vehicle deceleration Δ V.
To separate the initial setup unit 108 locking separative element 104 in order suppressing of pressing and to make lock-up clutch 26 become the described deviation constantly of separating switching transitional period of separated state, set described separation from the relation of storage in advance according to the actual vehicle deceleration regime the Reduced Speed Now and initially press P from jointing state by above-mentioned deceleration
LUFSpecifically, set according to the variable (parameter) of the related variations with retardation such as inertia torque of the inertia torque of engine crankshaft 13, rotary component and separate the initial P of pressure
LUF, the inertia torque of wherein said engine crankshaft 13 changes (difference) according to the deceleration regime of vehicle as mentioned above, and the inertia torque of described rotary component also changes with the same deceleration regime according to vehicle of inertia torque of engine crankshaft 13.The described variable relevant with inertia torque (parameter) expression vehicle deceleration state for example is the retardation Δ V or the engine speed change rate Δ N of vehicle
E, or with the retardation Δ V or the engine speed change rate Δ N of this vehicle
ERelevant parameter.Fig. 8 is that expression is with input speed N
INVehicle deceleration Δ V as intermediate variable initially presses P with separating
LUFBetween the figure of an example of the relation of storage in advance.Relation shown in Figure 8 is preestablished into the more little separation of retardation Δ V and is initially pressed P
LUFJust big more, and input speed N
INP is initially pressed in big more separation
LUFJust more little.For example in the solid line of Fig. 8, when retardation (absolute value of retardation) the Δ V of vehicle is greater than Δ V
1Δ V
2The time, if will be from the side conduct positive side of motor 12 to lock-up clutch 26 inputs, then the inertia torque of engine crankshaft 13 will increase to positive side, and engine torque T
E(in other words, from driving wheel through variable v-belt drive 18 and based on the current gear of this variable v-belt drive 18 than the torque that is input to the lock-up clutch 26) be negative torque during Reduced Speed Now at the engine braking state, so the absolute value of the necessary torque capacity of lock-up clutch 26 will diminish.Thereby, from Fig. 6 also as can be known, when necessary torque capacity diminishes, separate the initial P of pressure as long as make
LUFFor than P
LUF1Little value P
LUF2Get final product.Above-mentioned Fig. 8 is to be exactly predefined according to such relation.
Fig. 9 is the flow chart that is used to illustrate the Control work major component of electric control device 60, the major component of described Control work promptly be the working state of lock-up clutch 26 when vehicle deceleration travels from the Control work of jointing state when separated state is switched, Figure 10 is the sequential chart that is used to illustrate described Control work.In Fig. 9, among the step that locking engaging unit 102 is corresponding with described slow down the time (below omission " step " speech) SA1, P is pressed in the work of control locking work piezoelectricity magnetic cell DSU
DSUPress P with the work of described locking electromagnetic element SL
SL,, make lock-up clutch 26 press P as predetermined joint so that when vehicle deceleration travels
LUONUnder become jointing state.For example, be preferably in when carrying out oil-break work in the vehicle deceleration running process, carry out the control among the described SA1,, thereby further improve fuel efficiency so that enlarge described oil-break zone.
Then, in the SA2 corresponding, for example by judging engine speed N with described locking separative element 106
E(also can input speed N when the locking closed state
IN) whether be that predefined preset vehicle speed such as 10km/h judges whether to make the lock-up clutch 26 that is in jointing state to become separated state to get off.When being judged as of described SA2 negates, finish this routine, when for certainly the time, with described travelling state reading unit 110 and described the separation among the corresponding SA3 of initial pressure setup unit 108, read vehicle deceleration Δ V by the vehicle velocity V that reads from vehicle speed sensor 66 as vehicle speed variation rate.Then, initially press P based on above-mentioned vehicle deceleration Δ V shown in Figure 8 with separating
LUFBetween relation set and separate the initial P of pressure
LUFFor example, when vehicle deceleration Δ V be Δ V
1The time separate the initial P of pressure
LUFBe set to P
LUF1, when vehicle deceleration Δ V is and Δ V
1Compare the big Δ V of its absolute value
2The time separate the initial P of pressure
LUFBe set to P
LUF2
Then, among the SA4 that locking separative element 104 is corresponding with described slow down the time, for the working state that makes lock-up clutch 26 becomes separated state from jointing state, P is pressed in the work of control locking work piezoelectricity magnetic cell DSU
DSUPress P with the work of described locking electromagnetic element SL
SL, so that described instruction hydraulic pressure value is at first being pressed P from predetermined joint
LUONBecome the separation of setting at above-mentioned SA3 and initially press P
LUFAfterwards, be reduced to predetermined disjoining pressure P gradually
LUOFFFor example, when vehicle deceleration Δ V shown in the solid line of Figure 10 be Δ V
1The time, make described instruction hydraulic pressure value initially press P for the separation of setting at above-mentioned SA3
LUF1(t
SConstantly), be reduced to predetermined disjoining pressure P afterwards gradually
LUOFF(t
E1Constantly).At this moment, in fact lock-up clutch 26 is being represented as its working hydraulic pressure P
LUActual torque capacity be lower than (the retardation Δ V of the necessary torque capacity shown in the solid line
1) the moment begin to separate.That is t,
RConstantly become separation point.Yet, be Δ V if work as vehicle deceleration Δ V
2The time also with Δ V
1The time similarly get the instruction hydraulic pressure value shown in the solid line, then because lock-up clutch 26 is being represented as its working hydraulic pressure P
LUActual torque capacity be lower than (the retardation Δ V of the necessary torque capacity shown in the dot and dash line
2) the moment begin to separate, so separation point is t
R' constantly.Therefore, when vehicle deceleration Δ V be Δ V
2The time, if shown in the dot and dash line of Figure 10, make described instruction hydraulic pressure value initially press PLU2 (t for the separation of setting at above-mentioned SA3
SConstantly), be reduced to predetermined disjoining pressure P afterwards gradually
LUOFF(t
E2Constantly), then with above-mentioned retardation Δ V
1Situation the same, separation point is t
RConstantly.The relation of Fig. 8 is to make that as above-mentioned the deviation of separation point and the difference of vehicle deceleration Δ V are irrespectively suppressed to set.In addition, vehicle deceleration Δ V shown in Figure 8 also can be and the relevant parameter of this retardation Δ V, for example can be output shaft relative speed variation Δ N
OUTDeng.
In addition, P is initially pressed in described separation
LUFExcept the retardation Δ V of vehicle, can also be shown in the dot and dash line of Fig. 8, according to input speed N
INSet.In addition, the input speed N here
INAlso can be and this input speed N
INRelevant parameter for example can be engine speed N
E, impeller arbor 34 rotating speed (turbine rotating speed) N
T, input shaft 36 rotating speed (input shaft rotating speed) N
IN, and output shaft rotational speed N
OUTDeng.By like this, owing to also can consider according to input speed N
INDifference and different described negative torques is set and is separated the initial P of pressure
LUFSo, can more correctly hold the torque that is input in the lock-up clutch 26, thereby more correctly being reflected to, the necessary torque capacity when can be with lock-up clutch 26 separated separates the initial P of pressure
LUFIn.
Figure 11 is expression engine rotary speed variance ratio Δ N
EInitially press P with separating
LUFBetween the predefined figure of an example of the relation of storage in advance, described relation is used to initially press setup unit 108 to replace vehicle deceleration Δ V and according to engine speed change rate Δ N by above-mentioned separation
ESet and separate the initial P of pressure
LUFThe time embodiment in, Figure 11 is the figure suitable with Fig. 8.It is that vehicle deceleration Δ V is replaced with engine rotary speed variance ratio Δ N that Figure 11 compares with Fig. 8
E, with input shaft rotating speed N
INReplace with the figure of vehicle velocity V (not shown), Figure 11 can replace Fig. 8 and be used.
In addition, Figure 12 is the flow chart of another mode of execution that is used to illustrate the Control work major component of electric control device 60, the major component of described Control work promptly be the working state of lock-up clutch 26 when vehicle deceleration travels from the Control work of jointing state when separated state is switched, this figure is the figure suitable with Fig. 9.In Figure 12, have only SB3 different with the SA3 of Fig. 9, remaining SB1, SB2, SB4 SA1, SA2, the SA4 with Fig. 9 respectively are identical.Described SB3 and the SA3 of Fig. 9 equally are with above-mentioned travelling state reading unit 110 and separate the corresponding step of initial pressure setup unit 108, by the engine speed N that reads from engine rotation speed sensor 62
ERead engine speed change rate Δ N
EThen according to described engine speed change rate Δ N shown in Figure 11
EInitially press P with separating
LUFBetween relation set and separate the initial P of pressure
LUFFor example, as engine speed change rate Δ N
EBe Δ N
E1The time separate the initial P of pressure
LUFBe set to P
LUF1, as engine speed change rate Δ N
EFor with Δ N
E1Compare the big Δ N of its absolute value
E2The time separate the initial P of pressure
LUFBe set to P
LUF2
Thus with the embodiment of Fig. 9 similarly, set and separate the initial P of pressure
LUF, make the deviation and the engine speed change rate Δ N of separation point
EDifference irrespectively suppressed.In addition, engine speed change rate Δ N shown in Figure 11
EAlso can be and this engine speed change rate Δ N
ERelevant parameter for example can be input shaft rotating speed variance ratio Δ N
INDeng.
In addition, P is initially pressed in described separation
LUFExcept engine speed change rate Δ N
EOutside, can also set according to vehicle velocity V.In addition, the vehicle velocity V here also can be the parameter relevant with this vehicle velocity V, for example can be the output shaft rotational speed N
OUTDeng.By like this, different described negative torques is set and is separated the initial P of pressure owing to also can consider according to the difference of vehicle velocity V
LUFSo, can more correctly hold the torque of input in the lock-up clutch 26, thereby more correctly being reflected to, the necessary torque capacity when can be with lock-up clutch 26 separated separates the initial P of pressure
LUFSet middlely and separate the initial P of pressure
LUF, perhaps set and separate the initial P of pressure according to the optimum value in the vehicle velocity V
LUF, wherein said optimum value is to wait by the test of carrying out in advance to obtain.
As mentioned above, according to present embodiment, when the Reduced Speed Now of vehicle, since by separate initial press setup unit 108 (SA3, SB3) according to and along with the inertia torque of described Reduced Speed Now from motor 12 outputs, be the relevant parameter of inertia torque of engine crankshaft 13 systems, the relative speed variation Δ N of the motor 12 when vehicle deceleration Δ V when for example vehicle deceleration travels or vehicle deceleration travel
E, or the parameter relevant with these set and separate initial pressure P
LUF, therefore,, also can suppress the actual separated separation deviation constantly of lock-up clutch 26 even because the difference of the inertia torque of engine crankshaft 13 systems and the necessary torque capacity difference of lock-up clutch, P is initially pressed in wherein said separation
LUFBe that locking separative element 104 (SA4, SB4) become the switching transitional period of separated state lock-up clutch 26 from jointing state by deceleration the time, be used for making from making lock-up clutch 26 press P for the predetermined joint of jointing state
LUONThe rapid setting hydraulic pressure that descends.Thus, with because the inertia torque of the different engine crankshaft that brings 13 systems of vehicle deceleration state different, promptly have nothing to do with the different of relevant parameter of this inertia torque, can make as disengaging time α stable up to the separated time of lock-up clutch 26 reality, thereby owing to stop the speed Control of preceding variable v-belt drive 18 along with vehicle, be that the deceleration of vehicle before stopping to increase gear ratio, set in this wise vehicle before stopping gear ratio and deviation that the separation of the lock-up clutch 26 that produces is impacted is suppressed, and then can suitably improve rideability.
In addition, according to present embodiment, owing to initially press the input speed N of setup unit 108 (SA3) according to above-mentioned vehicle deceleration Δ V and variable v-belt drive 18 by above-mentioned separation
INSet above-mentioned separation and initially press P
LUFSo, can be with input speed N by described variable v-belt drive 18
INThe difference of negative torque of the motor 12 that brings of difference more correctly be reflected in the necessary torque capacity.
In addition, according to present embodiment, in the 5th invention, owing to initially press the relative speed variation Δ N of setup unit 108 (SB3) according to above-mentioned motor 12 by above-mentioned separation
EAnd vehicle actual vehicle speed V sets above-mentioned separation and initially presses P
LUFSo the difference that the motor that is brought by the difference of described vehicle velocity V can be born torque more correctly is reflected in the necessary torque capacity.
Below, other embodiments of the present invention are described.In following explanation,, and omit its explanation for the identical label of part mark same as the previously described embodiments.
Present embodiment is initially pressed P by the above-mentioned separation of learning above-mentioned above-mentioned disengaging time α shown in Figure 6 and coming change setting to set from predefined graph of a relation shown in Figure 8
LUFThat is, the learning control of present embodiment is being set the initial P of pressure of separation
LUFMake under the situation of=f (retardation Δ V) and separate the initial P of pressure
LUF=f (retardation Δ V)+learning value K, and set its learning value K by study actual separation time α, thereby to for example being to suppress above-mentioned disengaging time α and P is initially pressed in the separation set from the pass of above-mentioned Fig. 8
LUFCarry out change setting, with the deviation of further inhibition disengaging time α.
Figure 13 is that P is initially pressed in the above-mentioned separation of using when being used to illustrate the separating controlling of the lock-up clutch 26 that electric control device 60 had when carrying out vehicle deceleration and travel of setting
LUFThe functional block diagram of control function major component.In the drawings, locking separates study and allows judging unit 112 for example to judge whether and can initially press P for changing above-mentioned separation for the vehicle-state that can carry out the study of described disengaging time α by judging whether
LUFAnd allow the study of described disengaging time α.The vehicle-state that for example can carry out described study by above-mentioned travelling state reading unit 110 read, the oily temperature T of the oil hydraulic circuit of variable v-belt drive 18 or lock-up clutch 26 etc.
CVTFor the variation of the state of the temperature that is suitable for cruising, the state that does not have external loads such as air-conditioning, vehicle deceleration Δ V is in state in the predefined prespecified range that is suitable for learning etc.
Counting unit 114 judges whether locking separating controlling counter has surpassed scheduled time A, and wherein said locking separating controlling counter is to judge the time that the control that can begin to make lock-up clutch 26 become separated state begins from separate judging unit 106 by above-mentioned locking.Described scheduled time A for example is the time that locking separative element 104 carries out during by above-mentioned deceleration the control that makes lock-up clutch 26 become separated state becomes stable, is the value that the test etc. by carrying out is in advance obtained.In addition, when judge slippage integral value Δ N by actual separation identifying unit 120 described later
SLIPWhen having exceeded open judgment value C, described counting unit 114 will begin from judging the control that can begin to make lock-up clutch 26 become separated state, up to judging described slippage integral value Δ N
SLIPThe time that has exceeded till the open judgment value C is defined as disengaging time α.
Sliding mode begins the engine speed N of judging unit 116 from being read by above-mentioned travelling state reading unit 110
EWith the turbine rotational speed N
TJudge the slippage N of lock-up clutch 26
SLIP(=| N
E-N
T|) whether surpassed predetermined slippage B.(slippage is judged as separation when surpassing its judgment threshold continuously at the fixed time for example described predetermined slippage B to be set at the judgment threshold of judging than the known opening that is used for lock-up clutch 26.And usually, described judgment threshold is set to the to a certain degree value of size in order to prevent to judge by accident disconnected.) little value.Thus, minimum slippage can be got rid of as noise, even and such as the slippage N littler than above-mentioned judgment threshold
SLIPUnder the continuous situation, also can be used in the separation judgement of lock-up clutch 26, thereby can improve the precision of determining above-mentioned disengaging time α.In addition, replace above-mentioned turbine rotational speed N
TAlso can use input shaft rotating speed N
IN
Slippage integral unit 118 will begin judging unit 116 by above-mentioned sliding mode and judge above-mentioned slippage N above slippage B
SLIPIntegration is slippage integral value Δ N
SLIP(=∫ | N
E-N
T| dt).
The slippage integral value Δ N that actual separation judging unit 120 is judged by above-mentioned slippage integral unit 118 integrations
SLIPWhether surpass open judgment value C.Described open judgment value C waits by test in advance and is set to the value of judging that in fact lock-up clutch 26 separates.In addition, described actual separation judging unit 120 is being judged described slippage integral value Δ N
SLIPWhen having surpassed open judgment value C locking is separated judge mark and be made as ON.
Separate the initial learning control unit 122 of pressing based on the above-mentioned disengaging time α that determines by above-mentioned counting unit 114
RP is initially pressed in the current separation of current setting
LUFCChange to the separation of when 104 pairs of lock-up clutches of locking separative element 26 when slowing down carry out separating controlling next time, using next time and initially press P
LUFFFor example, separate the initial P of pressure when initially press setup unit 108 to set by above-mentioned separation
LUF=f (retardation Δ V) is when obtaining above-mentioned disengaging time α, and described separation initially presses learning control unit 122 as separate the initial P of pressure next time
LUFF=f (retardation Δ V)+learning value K is based on above-mentioned disengaging time α
RChange its learning value K.For example, as described disengaging time α
RCompare with above-mentioned disengaging time α long the time, in order to make described disengaging time α
RShorten, so that separate the initial P of pressure next time
LUFFInitially press P less than current separation
LUFCDescribed learning value K is set on ground, perhaps as described disengaging time α
RCompare with above-mentioned disengaging time α short the time, in order to make described disengaging time α
RElongated, so that separate the initial P of pressure next time
LUFFInitially press P greater than current separation
LUFCDescribed learning value K is set on ground.
Figure 14 is the flow chart that is used to illustrate the Control work major component of electric control device 60, the major component of described Control work promptly be lock-up clutch 26 is become use in the Control work of separated state, separate the initial P of pressure by making
LUFStudy disengaging time α sets change and separates the initial P of pressure
LUFThe time Control work.In Figure 14, allow among the corresponding SC1 of judging unit 112 separating study, by for example based on the oily temperature T of the oil hydraulic circuit of variable v-belt drive 18 or lock-up clutch 26 etc. with above-mentioned locking
CVTWait and judge whether to can carrying out the vehicle-state of the study of described disengaging time α for the variation of the state of the temperature that is suitable for cruising, the state that does not have external loads such as air-conditioning, vehicle deceleration Δ V is in state in the predefined prespecified range that is suitable for learning, thereby judge whether and for a change above-mentioned separation initially to press P
LUFAnd allow to carry out the study of above-mentioned disengaging time α.When being judged as of described SC1 negates, finish this routine, when being sure, in the SC2 corresponding with above-mentioned counting unit 114, judge whether locking separating controlling counter has surpassed scheduled time A, wherein said locking separating controlling counter is from judging the time that the control that can begin to make lock-up clutch 26 become separated state begins.
When being judged as of described SC2 negated, finish this routine, when for certainly the time, beginning to judge the slippage N of lock-up clutch 26 among the corresponding SC3 of judging unit 116 with above-mentioned sliding mode
SLIP(=| N
E-N
T|) whether surpassed predetermined slippage B.When being judged as of described SC3 negated, finish this routine, when for certainly the time, in the SC4 corresponding, will be judged out the above-mentioned slippage N that has surpassed slippage B with above-mentioned slippage integral unit 118
SLIPIntegration is slippage integral value Δ N
SLIP(=∫ | N
E-N
T| dt).Then, in the SC5 corresponding, judge above-mentioned slippage integral value Δ N with actual separation identifying unit 120
SLIPWhether exceeded open judgment value C.When being judged as of described SC5 negates, finish this routine, when being sure, in the SC6 corresponding with above-mentioned actual separation identifying unit 120 and above-mentioned counting unit 114, locking is separated judge mark be made as ON, and will begin from judging the control that can begin to make lock-up clutch 26 become separated state, up to judging described slippage integral value Δ N
SLIPThe time that has exceeded till the open judgment value C is defined as disengaging time α.Then, in the SC7 corresponding, based on the above-mentioned disengaging time α that determines at above-mentioned SC6 with separating initial pressure learning control unit 122
RP is initially pressed in the current separation of current setting
LUFCChange to the separation of when lock-up clutch 26 being carried out separating controlling next time, using next time and initially press P
LUFF
As mentioned above, according to present embodiment, judge the slippage N of lock-up clutch 26 when begin judging unit 116 (SC3) by sliding mode
SLIP(=| N
E-N
T|) when having surpassed predetermined slippage B, will be judged out the above-mentioned slippage N that has surpassed slippage B by above-mentioned slippage integral unit 118 (SC4)
SLIPIntegration is slippage integral value Δ N
SLIP(=∫ | N
E-N
T| dt).Then, will begin from judging the control that can begin to make lock-up clutch 26 become separated state, up to judge above-mentioned slippage integral value Δ N by actual separation judging unit 120 (SC5) by counting unit 114 (SC6)
SLIPThe time that has exceeded till the open judgment value C is defined as disengaging time α, therefore can accurately judge the actual separation of lock-up clutch 26, thereby can carry out high-precision above-mentioned disengaging time α
RStudy.Thereby, improved by separating initial learning control unit 122 (SC7) that press based on above-mentioned disengaging time α
RP is initially pressed in the current separation of current setting
LUFCChange to the separation of when the separating controlling next time of lock-up clutch 26, using next time and initially press P
LUFFThe precision of learning control.
More than, describe embodiments of the invention in detail based on accompanying drawing, but the present invention can be suitable in other modes also.
For example, the vehicle of the foregoing description has variable v-belt drive 18 as automatic transmission, but also can be to be called as towed stepless speed variator etc., wherein said towed stepless speed variator comprises can be around a pair of cone of common axle center rotation, and be clamped between the described a pair of cone, and can be, thereby make gear ratio variable by rotating center and the crossing angle between the axle center that changes described roller around a plurality of rollers of the rotating center rotation that intersects with described axle center.In described towed stepless speed variator, be clamped in the function that roller between a pair of cone plays transmission part.
In addition, the vehicle of the foregoing description has the variable v-belt drive 18 as automatic transmission, but also can be the step change transmission of planetary gear type etc. for example, wherein the planetary gear type step change transmission have constituted a plurality of speed change levels altogether by the working group with clamping close devices such as clutch or breaks.
In addition, the vehicle of the foregoing description has the fluid torque converter 14 that transmits the output of motor 12 via fluid, but replaces fluid torque converter 14 also can adopt other fluid type transmission device such as hydraulic couplers.
In addition, above-mentioned explanation only be a mode of execution, the present invention also can carry out various changes with the knowledge based on those skilled in the art, improved mode is implemented.
Claims (7)
1. the control gear of a lock-up clutch for vehicle, it is used for having the vehicle fluid transmission means of the lock-up clutch of direct binding motor and automatic transmission, described control gear has when deceleration locking separative element, when when vehicle deceleration travels, making described lock-up clutch become the switching transition period of separated state from jointing state, locking separative element output hydraulic pressure command during described deceleration, this hydraulic pressure command makes that from making described lock-up clutch be that the predetermined joint of jointing state is pressed to drop to rapidly and separated after initial the pressure, reduce to the predetermined disjoining pressure that becomes separated state gradually, described control gear is characterised in that
Comprise and separate the initial setup unit of pressing, initially press according to setting described separation along with the Reduced Speed Now of described vehicle from the inertia torque of motor output this unit,
Described separation initially presses setup unit along with described inertia torque is big more, makes that described separation is initial presses more for a short time, and determines that based on described inertia torque described separation initially presses.
2. the control gear of a lock-up clutch for vehicle, it is used for having the vehicle fluid transmission means of the lock-up clutch of direct binding motor and automatic transmission, described control gear has when deceleration locking separative element, when when vehicle deceleration travels, making described lock-up clutch become the switching transition period of separated state from jointing state, locking separative element output hydraulic pressure command during described deceleration, this hydraulic pressure command is feasible after the predetermined joint pressure that makes described lock-up clutch become jointing state drops to the initial pressure of separation rapidly, reduce to the predetermined disjoining pressure that becomes separated state gradually, described control gear is characterised in that
Comprise and separate the initial setup unit of pressing, the relevant retardation relevant parameter of vehicle deceleration when this unit basis is travelled with described vehicle deceleration is set the described initial pressure of separating,
Described separation initially presses setup unit according to then separating the initial big more relation of pressing along with retardation is more little, determines that based on described retardation relevant parameter described separation initially presses,
In the retardation that described retardation relevant parameter is a vehicle, engine speed change rate or the output shaft relative speed variation any.
3. the control gear of lock-up clutch for vehicle as claimed in claim 2, wherein, described separation initially presses setup unit except according to the described retardation relevant parameter, also sets the described initial pressure of separating according to the input speed relevant parameter relevant with the input speed of described automatic transmission
In the input speed that described input speed relevant parameter is described automatic transmission, the rotating speed of described motor, turbine rotating speed or the output shaft rotating speed any.
4. the control gear of lock-up clutch for vehicle as claimed in claim 3, wherein, described separation is initially pressed setup unit to make separation initially press big more along with retardation is more for a short time and is made the initial pressure of separation low more along with input speed is high more, and determines to press described the separation initially based on described retardation relevant parameter and described input speed relevant parameter.
5. the control gear of a lock-up clutch for vehicle, it is used for having the vehicle fluid transmission means of the lock-up clutch of direct binding motor and automatic transmission, described control gear has when deceleration locking separative element, when when vehicle deceleration travels, making described lock-up clutch become the switching transition period of separated state from jointing state, locking separative element output hydraulic pressure command during described deceleration, this hydraulic pressure command is feasible after the predetermined joint pressure that makes described lock-up clutch become jointing state drops to the initial pressure of separation rapidly, reduce to the predetermined disjoining pressure that becomes separated state gradually, described control gear is characterised in that
Comprise and separate the initial setup unit of pressing, the relevant relative speed variation relevant parameter of relative speed variation of the described motor when this unit basis is travelled with described vehicle deceleration is set the described initial pressure of separating,
Described separation initially presses setup unit according to then separating the initial big more relation of pressing along with the relative speed variation of motor is more little, determines that based on described relative speed variation relevant parameter described separation initially presses,
In the retardation that described relative speed variation relevant parameter is a vehicle, engine speed change rate or the output shaft relative speed variation any.
6. the control gear of lock-up clutch for vehicle as claimed in claim 5, wherein, described separation initially presses setup unit except according to the described relative speed variation relevant parameter, also sets the described initial pressure of separating according to the speed of a motor vehicle relevant parameter relevant with the actual vehicle speed of described vehicle
In the input speed that described speed of a motor vehicle relevant parameter is described automatic transmission, the rotating speed of described motor, turbine rotating speed or the output shaft rotating speed any.
7. the control gear of lock-up clutch for vehicle as claimed in claim 6, wherein, described separation is initially pressed setup unit to make separation initially press big more along with the engine speed change rate is more for a short time and is made the initial pressure of separation low more along with the speed of a motor vehicle is high more, and determines to press described the separation initially based on described relative speed variation relevant parameter and described speed of a motor vehicle relevant parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100537188A CN1831385B (en) | 2005-03-10 | 2005-03-10 | Control device of locking clutch for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100537188A CN1831385B (en) | 2005-03-10 | 2005-03-10 | Control device of locking clutch for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1831385A CN1831385A (en) | 2006-09-13 |
| CN1831385B true CN1831385B (en) | 2011-09-14 |
Family
ID=36993828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005100537188A Expired - Fee Related CN1831385B (en) | 2005-03-10 | 2005-03-10 | Control device of locking clutch for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1831385B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5162785B2 (en) * | 2007-09-28 | 2013-03-13 | 株式会社小松製作所 | Shift control device for work vehicle |
| US8296027B2 (en) * | 2007-10-25 | 2012-10-23 | GM Global Technology Operations LLC | Method and apparatus to control off-going clutch torque during torque phase for a hybrid powertrain system |
| US8079933B2 (en) * | 2007-11-04 | 2011-12-20 | GM Global Technology Operations LLC | Method and apparatus to control engine torque to peak main pressure for a hybrid powertrain system |
| JP4971967B2 (en) * | 2007-12-21 | 2012-07-11 | ジヤトコ株式会社 | Automatic transmission lockup clutch control device |
| DE102010039181B4 (en) * | 2010-08-11 | 2022-06-15 | Robert Bosch Gmbh | Procedure for detecting the condition of the clutch |
| CN104136817B (en) * | 2012-02-22 | 2016-05-04 | 丰田自动车株式会社 | The control device of power transmission |
| JP6439756B2 (en) * | 2016-07-07 | 2018-12-19 | トヨタ自動車株式会社 | Control device for vehicle transmission |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5609551A (en) * | 1994-12-12 | 1997-03-11 | Nissan Motor Co., Ltd. | Lockup control system for torque converter |
-
2005
- 2005-03-10 CN CN2005100537188A patent/CN1831385B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5609551A (en) * | 1994-12-12 | 1997-03-11 | Nissan Motor Co., Ltd. | Lockup control system for torque converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1831385A (en) | 2006-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1831385B (en) | Control device of locking clutch for vehicle | |
| EP1403564B1 (en) | Hydraulic control system and method for belt-drive continuously variable transmission | |
| US8827850B2 (en) | Control device and control method for continuously variable transmission | |
| CN103052832A (en) | Device for controlling continuous variable transmission for vehicle | |
| CN101846182A (en) | Stepless speed variator and controlling method thereof | |
| CN101809335A (en) | Control device and control method for continuously variable transmission | |
| CN103133689A (en) | Power transmission apparatus | |
| JP2002323124A (en) | Control device for hydraulic fluid temperature for power transmission | |
| WO2009001536A2 (en) | Lock-up clutch control apparatus | |
| JPS6170266A (en) | Cvt control system | |
| EP2185840B1 (en) | Control device of a continuously variable transmission | |
| CN1830709B (en) | Control apparatus of vehicle | |
| CN102112782B (en) | Power transmission device and vehicle equipped with same | |
| JP2004316832A (en) | Hydraulic control device of continuously variable transmission | |
| JP4576821B2 (en) | Control device for vehicle lock-up clutch | |
| CN100453855C (en) | Hydraulic control device of automatic transmission | |
| JP4672252B2 (en) | Control device for vehicle | |
| CN100535483C (en) | Controller of automatic speed variator | |
| JP2007085485A (en) | Hydraulic control device | |
| JP2009250304A (en) | Hydraulic control device | |
| WO2019102893A1 (en) | Automatic transmission control method and control device | |
| JP2009216128A (en) | Hydraulic control device | |
| JP4178801B2 (en) | Hydraulic control device | |
| JPH1061755A (en) | Control device of automatic transmission for vehicle | |
| JP4947005B2 (en) | Control device for continuously variable transmission for vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20200310 |