CN103883642B - A kind of clutch pressure controlling method and device - Google Patents
A kind of clutch pressure controlling method and device Download PDFInfo
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- CN103883642B CN103883642B CN201410153772.9A CN201410153772A CN103883642B CN 103883642 B CN103883642 B CN 103883642B CN 201410153772 A CN201410153772 A CN 201410153772A CN 103883642 B CN103883642 B CN 103883642B
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Abstract
The invention provides a kind of clutch pressure controlling method and device, by calculating feed-forward target oil pressure and feedback target oil pressure respectively, and obtain clutch pressure according to feed-forward target oil pressure and feedback target oil pressure, feedback target oil pressure can reflect motor practical operation situation, therefore, can for the oil pressure of the current performance of this car engine and operation conditions adjustment clutch, simply, reliably, be widely used, solve the problem of smooth gear shifting that car load otherness brings and travelling comfort difference, promote driving experience.
Description
Technical field
The present invention relates to stepless gearbox Clutch Control technical field, be specifically related to a kind of clutch pressure controlling method and device.
Background technique
Clutch is arranged between motor and speed changer, is the total member be directly associated with motor in automotive transmission.The flywheel group of clutch and engine crankshaft is installed together, and is the parts of cut-out and transferring power between motor and automotive transmission.The effect of clutch makes can engage gradually between motor with speed changer, to transmit the power that motor inputs to speed changer, thus ensure automobile balance starting, and, contacting between temporarily disconnected motor and speed changer, namely the power that motor inputs to speed changer is cut off, so that impact when gear shift and minimizing gear shift.
In clutch cohesive process, secondary speed slowly can decline along with the rising of clutch pressure, and the lowering speed of secondary speed can cause output shaft torque to fluctuate, thus affect the length of clutch combination time, the smoothness of gearshift will be reduced, produce jitter phenomenon, have a strong impact on driving experience.Therefore, be just necessary to carry out suitable control to secondary speed lowering speed, to ensure that clutch combination time reaches requirement.
Existing clutch pressure control program mainly slowly increases oil pressure directly to clutch, allows secondary speed decline, until clutch combines.But, due to the car load property of there are differences, the existence of this car load otherness, make existing clutch pressure control program cannot do corresponding adjustment according to the actual conditions of each vehicle, and this otherness cannot be avoided completely in assembly process, therefore, utilize existing clutch pressure control program to carry out problem that clutch oil pressure-controlled cannot avoid above-mentioned smooth gear shifting and travelling comfort difference completely.
Therefore, a kind of clutch pressure controlling method and device is needed badly in order to solve the problems of the technologies described above.
Summary of the invention
The present invention is directed to above shortcomings in prior art, a kind of clutch pressure controlling method and device are provided, the problem of smooth gear shifting and travelling comfort difference cannot be avoided in order to solve existing clutch pressure control program completely.
The present invention, for solving the problems of the technologies described above, adopts following technological scheme:
The invention provides a kind of clutch pressure controlling method, comprising: calculate feed-forward target oil pressure and feedback target oil pressure;
According to described feed-forward target oil pressure and described feedback target oil pressure, calculate clutch pressure.
Preferably, described calculating feed-forward target oil pressure, specifically comprises:
Obtain secondary speed signal, and according to the actual secondary speed variance ratio of described secondary speed calculated signals;
Obtain Engine torque and oil temperature signal, and according to described actual secondary speed variance ratio, Engine torque, oil temperature signal, and moment radius, the spring force of clutch retraction springs, the area of clutch plunger cylinder of the clutch friction plate preset, calculate feed-forward target oil pressure.
Preferably, described according to described actual secondary speed variance ratio, Engine torque, oil temperature signal, and moment radius, the spring force of clutch retraction springs, the area of clutch plunger cylinder of the clutch friction plate preset, calculate feed-forward target oil pressure, specifically comprise:
According to the area of described actual secondary speed variance ratio, Engine torque, the moment radius of clutch friction plate, the spring force of clutch retraction springs and clutch plunger cylinder, calculate the theoretical value of feed-forward target oil pressure;
According to the corresponding relation of correction value of described oil temperature signal and the oil temperature preset and feed-forward target oil pressure, obtain the correction value of feed-forward target oil pressure corresponding to described oil temperature signal;
Calculate the theoretical value of described feed-forward target oil pressure and the correction value sum of described feed-forward target oil pressure, obtain feed-forward target oil pressure.
Preferably, described method also comprises: the clutch combination time recording each gearshift cycle;
Described calculating feedback target oil pressure, specifically comprises:
Obtain accelerator opening amount signal and oil temperature signal, and according to the clutch combination time in the last gearshift cycle of described accelerator opening amount signal, corresponding relation between default accelerator open degree and the reference value of target turbine relative speed variation, record, default oil temperature signal and the correction value of default target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature, calculate target turbine relative speed variation;
According to described target turbine relative speed variation and actual secondary speed variance ratio, obtain feedback target oil pressure.
Preferably, the clutch combination time in the described last gearshift cycle according to described accelerator opening amount signal, corresponding relation between default accelerator open degree and the reference value of target turbine relative speed variation, record, default oil temperature signal and the correction value of default target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature, calculate target turbine relative speed variation, specifically comprise:
According to the corresponding relation between described accelerator opening amount signal and the reference value of default accelerator open degree and target turbine relative speed variation, obtain the reference value of target turbine relative speed variation corresponding to described accelerator opening amount signal;
According to the clutch combination time in the last gearshift cycle of record, described oil temperature signal and the correction value of default target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature, obtain the correction value of target turbine relative speed variation;
Calculate the reference value of described target turbine relative speed variation and the correction value sum of described target turbine relative speed variation, obtain target turbine relative speed variation;
Described according to described target turbine relative speed variation and actual secondary speed variance ratio, obtain feedback target oil pressure, specifically comprise:
According to the difference of described target turbine relative speed variation and actual secondary speed variance ratio, carry out PID adjustment, obtain feedback target oil pressure.
The present invention also provides a kind of clutch oil pressure control device, comprising: processing unit, for calculating feed-forward target oil pressure and feedback target oil pressure, and according to described feed-forward target oil pressure and feedback target oil pressure, calculates clutch pressure.
Further, this clutch oil pressure control device also comprises secondary speed detection unit, oil temperature detection unit and receiving element, is preset with moment radius, the spring force of clutch retraction springs, the area of clutch plunger cylinder in described processing unit;
Described secondary speed detection unit is used for, and detects secondary speed signal;
Described oil temperature detection unit is used for, and detects oil temperature signal;
Described receiving element is used for, and receives the secondary speed signal that secondary speed detection unit sends, and receives the oil temperature signal that oil temperature detection unit sends, and, receive the Engine torque that electronic control unit ECU sends;
Described processing unit specifically for, according to the actual secondary speed variance ratio of secondary speed calculated signals that receiving element receives; And, according to the area of described actual secondary speed variance ratio, Engine torque, oil temperature signal, the moment radius of clutch friction plate, the spring force of clutch retraction springs and clutch plunger cylinder, calculate feed-forward target oil pressure.
Preferably, the corresponding relation of the correction value of oil temperature and feed-forward target oil pressure is also preset with in described processing unit;
Described processing unit specifically for, according to the area of the moment radius of actual secondary speed variance ratio, Engine torque, clutch friction plate, the spring force of clutch retraction springs and clutch plunger cylinder, calculate feed-forward target oil pressure theoretical value, according to described oil temperature signal and the oil temperature preset and the corresponding relation of oil pressure correction value, obtain the oil pressure correction value that described oil temperature signal is corresponding, and calculate described feed-forward target oil pressure theoretical value and described oil pressure correction value sum, obtain feed-forward target oil pressure.
Further, this clutch oil pressure control device also comprises timing unit and accelerator open degree detection unit, and described timing unit is for recording the clutch combination time in each gearshift cycle; Described accelerator open degree detection unit is used for, and detects accelerator opening amount signal;
Corresponding relation between the reference value being also preset with accelerator open degree and target turbine relative speed variation in described processing unit, and the corresponding relation of the correction value of target turbine relative speed variation and clutch combination time and oil temperature;
Described receiving element also for, receive the accelerator opening amount signal that accelerator open degree detection unit sends;
Described processing unit also for, the accelerator opening amount signal received according to receiving element, the clutch combination time in the last gearshift cycle of timing unit record, current oil temperature signal that receiving element receives and the correction value of default oil temperature signal and default target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature, calculate target turbine relative speed variation, and according to described target turbine relative speed variation and actual secondary speed variance ratio, obtain feedback target oil pressure.
Preferably, described processing unit specifically for, according to the corresponding relation between described accelerator opening amount signal and the reference value of default accelerator open degree and target turbine relative speed variation, obtain the reference value of target turbine relative speed variation corresponding to described accelerator opening amount signal; According to the corresponding relation of the clutch combination time in the last gearshift cycle of described timing unit record, current oil temperature signal and default target turbine relative speed variation correction value and clutch combination time and oil temperature, obtain the correction value of target turbine relative speed variation; Calculate the reference value of described target turbine relative speed variation and the correction value sum of described target turbine relative speed variation, obtain target turbine relative speed variation; And, according to the difference of described target turbine relative speed variation and actual secondary speed variance ratio, carry out PID adjustment, obtain feedback target oil pressure.
Clutch pressure controlling method of the present invention and device, by calculating feed-forward target oil pressure and feedback target oil pressure respectively, and obtain clutch pressure according to feed-forward target oil pressure and feedback target oil pressure, feedback target oil pressure can reflect motor practical operation situation, therefore, can for the oil pressure of the current performance of this car engine and operation conditions adjustment clutch, simply, reliably, be widely used, solve the problem of smooth gear shifting that car load otherness brings and travelling comfort difference, promote driving experience.
Accompanying drawing explanation
One of clutch pressure control flow schematic diagram that Fig. 1 provides for the embodiment of the present invention;
The schematic diagram two of the clutch oil pressure-controlled that Fig. 2 provides for the embodiment of the present invention;
The PID regulable control schematic diagram that Fig. 3 provides for the embodiment of the present invention;
The schematic flow sheet of the calculating feed-forward target oil pressure that Fig. 4 provides for the embodiment of the present invention;
The schematic flow sheet of the calculating target turbine relative speed variation that Fig. 5 provides for the embodiment of the present invention;
The structural representation of the clutch oil pressure control device that Fig. 6 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the present invention, carry out clear, complete description to the technological scheme in the present invention, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, belongs to the scope of protection of the invention.
The embodiment of the present invention provides a kind of clutch pressure controlling method, and the method by calculating feed-forward target oil pressure and feedback target oil pressure, and according to described feed-forward target oil pressure and feedback target oil pressure, obtains clutch pressure, and then controls clutch.
This clutch pressure controlling method is simple, reliable, is widely used, and can obtain clutch pressure for the current performance of this car engine and operation conditions, solves the problem of smooth gear shifting that car load otherness brings and travelling comfort difference, promotes driving experience.
The clutch pressure controlling method that the embodiment of the present invention provides is applied to clutch oil pressure control device 1, see Fig. 6, this clutch oil pressure control device 1 can comprise: processing unit 11, secondary speed detection unit 12, oil temperature detection unit 13, receiving element 14, timing unit 15, accelerator open degree detection unit 16 and transmitting element 17.Secondary speed detection unit 12 can adopt turbine speed sensor to realize, oil temperature detection unit 13 can adopt oil temperature sensor 3 to realize, accelerator open degree detection unit 16 can adopt accelerator pedal position sensor to realize, processing unit 11 can pass through TCU(TransmissionControlUnit, automatic transmission case control unit) realize.
Clutch oil pressure control device 1 can receive turbine speed sensor, oil temperature sensor, ECU(ElectronicControlUnit, electronic control unit) 2 and accelerator pedal position sensor send signal, clutch pressure is obtained according to the calculated signals received, and the clutch pressure calculated is sent to clutch oil pressure electromagnetic valve 3, to realize the control to clutch.
Following parameter is stored: increase and turn round coefficient C1, rotary inertia C2, the moment radius r of clutch friction plate, the area S of clutch plunger cylinder, the spring force F of clutch retraction springs in clutch oil pressure control device 1
bullet.
Following corresponding relation is also stored in clutch oil pressure control device 1:
1, the corresponding relation of the correction value of oil temperature and feed-forward target oil pressure;
Corresponding relation between the reference value of 2, accelerator open degree and target turbine relative speed variation;
3, the correction value of target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature.
Below in conjunction with Fig. 1, Fig. 2 and Fig. 6, be described in detail to the clutch pressure control flow that the embodiment of the present invention provides, this flow process comprises the following steps:
Step 101, obtains secondary speed signal, and according to the actual secondary speed variance ratio of secondary speed calculated signals.
Concrete, turbine speed sensor can detect secondary speed, and the secondary speed signal detected being sent to the receiving element 14 of clutch oil pressure control device 1, the processing unit 11 of clutch oil pressure control device 1 is according to the actual secondary speed variance ratio of the secondary speed calculated signals received.Algorithm according to the actual secondary speed rate of secondary speed calculated signals belongs to prior art, does not repeat them here.
Step 102, obtain Engine torque and oil temperature signal, and according to actual secondary speed variance ratio, Engine torque, oil temperature signal, and the moment radius of clutch friction plate, the spring force of clutch retraction springs, the area of clutch plunger cylinder and described oil temperature signal, calculate feed-forward target oil pressure.
Concrete, oil temperature sensor can detect motor oil temperature, and the oil temperature signal detected is sent to the receiving element 14 of clutch oil pressure control device 1.
Engine torque is the basic parameter of motor, is stored in ECU2, and Engine torque is sent to clutch oil pressure control device 1 by ECU2.
The processing unit 11 of clutch oil pressure control device 1 is according to actual secondary speed variance ratio, Engine torque, oil temperature signal, and the moment radius of clutch friction plate, the spring force of clutch retraction springs, the area of clutch plunger cylinder, calculate the process of feed-forward target oil pressure, be described in detail follow-up.
Step 103, obtain accelerator opening amount signal and oil temperature signal, and according to the clutch combination time in the last gearshift cycle of accelerator opening amount signal, corresponding relation between default accelerator open degree and the reference value of target turbine relative speed variation, record, default oil temperature signal and the correction value of default target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature, calculate target turbine relative speed variation.
Concrete, accelerator pedal position sensor can detect accelerator open degree, and the accelerator opening amount signal detected is sent to the receiving element 14 of clutch oil pressure control device 1.The oil temperature signal detected is sent to the receiving element 14 of clutch oil pressure control device 1 by oil temperature sensor, and wherein, oil temperature signal is the current oil temperature signal that oil temperature sensor detects within the current gearshift cycle.
The processing unit 11 of clutch oil pressure control device 1, according to the clutch combination time in the last gearshift cycle of accelerator opening amount signal, corresponding relation between default accelerator open degree and the reference value of target turbine relative speed variation, this device record, oil temperature signal and the correction value of default target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature, calculates target turbine relative speed variation.Calculate the detailed process of target turbine relative speed variation, be described in detail follow-up.
Step 104, according to target turbine relative speed variation and actual secondary speed variance ratio, obtains feedback target oil pressure.
Concrete, the processing unit 11 of clutch oil pressure control device 1 according to the difference of target turbine relative speed variation and actual secondary speed variance ratio, can carry out PID adjustment, obtains feedback target oil pressure.
PID regulates the deviation mainly according to target turbine relative speed variation and actual secondary speed variance ratio, ratio is carried out to clutch pressure, integration and differentiation controls, to reach the object eliminating deviation, even if actual secondary speed variance ratio progressively tends to target turbine relative speed variation, thus reaches accurate control.
See Fig. 3, the processing unit 11 of clutch oil pressure control device 1 first calculates the difference of target turbine relative speed variation and actual secondary speed variance ratio, and the adjustment of proportion adjustment, integral adjustment and differential is carried out to this difference, then by the results added that proportion adjustment, integral adjustment, differential regulate, thus feedback target oil pressure is obtained.
The specific implementation that PID regulates belongs to prior art, does not repeat them here.
Step 105, according to feed-forward target oil pressure and feedback target oil pressure, calculates clutch pressure.
Concrete, feed-forward target oil pressure and feedback target oil pressure are added by the processing unit 11 of clutch oil pressure control device 1, calculate clutch pressure.
Further, after calculating clutch pressure, described method is further comprising the steps of:
Step 106, sends to Clutch Control solenoid valve by clutch pressure.
Concrete, the processing unit 11 of clutch oil pressure control device 1 indicates transmitting element 17 that the clutch pressure calculated is sent to Clutch Control solenoid valve 3, carrys out the combination time of solenoidoperated cluthes.
Can be found out by above-mentioned steps 101-106, feedback target oil pressure can reflect motor practical operation situation, therefore, this flow process can for the current performance of this car engine and operation conditions adjustment clutch pressure, simply, reliably, be widely used, solve the problem of smooth gear shifting that car load otherness brings and travelling comfort difference, promote driving experience.
It should be noted that, step 103 and step 104 also can perform before step 102, or, perform with step 102 simultaneously.
Elaborate to the calculation process of feed-forward target oil pressure below in conjunction with Fig. 4, as shown in Figure 4, this flow process comprises the following steps:
Step 401, according to the area of the moment radius of actual secondary speed variance ratio, Engine torque, clutch friction plate, the spring force of clutch retraction springs and clutch plunger cylinder, calculates the theoretical value of feed-forward target oil pressure.
Concrete, the theoretical value of feed-forward target oil pressure is calculated by formula (1):
Wherein, Tq
motorfor Engine torque, α is actual secondary speed variance ratio, and C1 is that coefficient is turned round in increasing, and C2 is rotary inertia, and r is the moment radius of clutch friction plate, and S is the area of clutch plunger cylinder; F
bulletfor the spring force of clutch retraction springs.Wherein, Tq
motor, C1, C2, r, S, F
bulletbe the intrinsic parameter of equipment.
Engine torque Tq
motorbe multiplied by increasing to turn round coefficient C1 and be clutch moment of torque, actual secondary speed variance ratio α is multiplied by rotary inertia C2 and is inertia torque.
Step 402, according to the corresponding relation of correction value of oil temperature signal and the oil temperature preset and feed-forward target oil pressure, obtains the correction value of feed-forward target oil pressure corresponding to this oil temperature signal.
Concrete, in order to ensure the accurate of feed-forward target oil pressure, needing the corresponding relation according to oil temperature and oil pressure correction value, the theoretical value of feed-forward target oil pressure is revised.
The corresponding relation of the correction value of oil temperature and feed-forward target oil pressure can be stored in the processing unit 11 of clutch oil pressure control device 1 in the form of a table, and this corresponding relation can be as shown in table 1:
| -40 | -20 | 0 | 20 | 60 | 80 | 120 |
| 0.08 | 0.06 | 0.04 | 0.01 | -0.02 | -0.03 | -0.02 |
Table 1
Engine parameter, the suspension parameter of different automobile types are all different, and therefore, for different vehicles, oil temperature is not identical with the corresponding relation of the correction value of feed-forward target oil pressure yet.
Oil temperature can be divided into multiple segment, the oil temperature of each segment end points and the corresponding relation of oil pressure correction value experimentally data determination obtain.In each segment, oil pressure correction value and oil temperature are linear relationship.
The processing unit 11 of clutch oil pressure control device 1, after receiving oil temperature signal, according to this oil temperature signal question blank 1, obtains the correction value of feed-forward target oil pressure corresponding to this oil temperature signal.
If current detection to oil temperature inquire about in Table 1 less than, then determine that current oil temperature falls into the oil temperature interval of table 1, and according to the linear relationship between the oil temperature in this interval and oil pressure correction value, by linear interpolation algorithm, the oil pressure correction value that this oil temperature is corresponding can be obtained.The obtain manner of above-mentioned oil pressure correction value belongs to prior art, does not repeat them here.
Step 403, calculates the theoretical value of feed-forward target oil pressure and the correction value sum of feed-forward target oil pressure, obtains feed-forward target oil pressure.
Below in conjunction with Fig. 5, elaborate to the calculation process of target turbine relative speed variation, as shown in Figure 5, this flow process comprises the following steps:
Step 501, according to the corresponding relation between the accelerator opening amount signal of reality and the reference value of default accelerator open degree and target turbine relative speed variation, obtains the reference value of target turbine relative speed variation corresponding to this accelerator opening amount signal.
Concrete, the corresponding relation between the reference value of accelerator open degree and target turbine relative speed variation can be stored in the processing unit 11 of clutch oil pressure control device 1 in the form of a table, and this corresponding relation can be as shown in table 2:
Table 2
Accelerator open degree can be divided into multiple segment, the corresponding relation of the accelerator open degree of each segment end points and the reference value of target turbine relative speed variation experimentally data determination obtains.In each segment, the reference value of target turbine relative speed variation and accelerator open degree are linear relationship.
If current detection to accelerator open degree inquire about in table 2 less than, then determine that current accelerator open degree falls into the accelerator open degree interval of table 2, and according to the linear relationship between the accelerator open degree in this interval and the reference value of target turbine relative speed variation, by linear interpolation algorithm, the reference value of target turbine relative speed variation corresponding to this accelerator open degree can be obtained.The obtain manner of the reference value of above-mentioned target turbine relative speed variation belongs to prior art, does not repeat them here.
Consider different driving habitses, some drivers step on brake engage a gear then to step on the gas starting, have plenty of direct engage a gear to step on the gas starting, in table 2, the setting of the reference value of target turbine relative speed variation both take into account the situation of static engage a gear, considered again the situation of engage a gear of stepping on the gas.When accelerator open degree is 0, it is the situation of static engage a gear; When accelerator open degree is non-zero, it is the situation of engage a gear of stepping on the gas.
The processing unit 11 of clutch oil pressure control device 1, after receiving accelerator opening amount signal, according to this accelerator opening amount signal question blank 2, can obtain the reference value of target turbine relative speed variation corresponding to this accelerator opening amount signal.
Step 502, according to the clutch combination time in last gearshift cycle of record, oil temperature signal and the correction value of default target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature, the correction value of acquisition target turbine relative speed variation.
Concrete, in order to ensure the accurate of target turbine relative speed variation, needing the corresponding relation of correction value according to target turbine relative speed variation and clutch combination time and oil temperature, the reference value of target turbine relative speed variation is revised.
The correction value of target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature can be stored in the processing unit 11 of clutch oil pressure control device 1 in the form of a table, this corresponding relation is as shown in table 3: the first row represents the clutch combination time (unit: ms) in previous gearshift cycle, first row represents the oil temperature (unit: DEG C) in current gearshift cycle, and the value in table represents the correction value of target turbine relative speed variation.
| ---- | 500 | 1000 | 1500 | 2000 | 2500 | 3000 |
| -40 | -2 | 0 | 2 | 5 | 7 | 10 |
| 0 | -3 | 0 | 3 | 5 | 8 | 10 |
| 40 | -5 | 0 | 4 | 7 | 8 | 12 |
| 80 | -5 | 0 | 5 | 6 | 9 | 15 |
| 120 | -6 | 0 | 5 | 5 | 6 | 13 |
Table 3
Oil temperature can be divided into multiple segment, the corresponding relation of the oil temperature of each segment end points and the correction value of target turbine relative speed variation and clutch combination time experimentally data determination obtains.In each segment, the correction value of target turbine relative speed variation and oil temperature are linear relationship.
Engine parameter, the suspension parameter of different automobile types are all different, and therefore, for different vehicles, the correction value of target turbine relative speed variation is not identical with the corresponding relation of oil temperature with clutch combination time yet.
Because clutch oil pressure control device 1 can record the clutch combination time in each gearshift cycle, and can Real-time Obtaining oil temperature signal, when a gearshift cycle starts, clutch oil pressure control device 1, according to the clutch combination time in previous gearshift cycle of record and current oil temperature signal question blank 3, obtains the correction value of target turbine relative speed variation corresponding to the clutch combination time in this oil temperature signal and previous gearshift cycle.
If current detection to oil temperature inquire about in table 3 less than, then determine current oil temperature falls into which oil temperature interval of table 3, and according to the linear relationship between the oil temperature in this interval and the correction value of target turbine relative speed variation, by linear interpolation algorithm, the correction value of target turbine relative speed variation corresponding to this oil temperature can be obtained.The obtain manner of the correction value of above-mentioned target turbine relative speed variation belongs to prior art, does not repeat them here.
Step 503, calculates the reference value of target turbine relative speed variation and the correction value sum of target turbine relative speed variation, obtains target turbine relative speed variation.
Another embodiment of the present invention also provides a kind of clutch oil pressure control device 1, and as shown in Figure 6, this device comprises:
Processing unit 11, for calculating feed-forward target oil pressure and feedback target oil pressure, and according to described feed-forward target oil pressure and feedback target oil pressure, calculates clutch pressure.
Further, this clutch oil pressure control device 1 also comprises: secondary speed detection unit 12, oil temperature detection unit 13 and receiving element 14, is preset with moment radius, the spring force of clutch retraction springs, the area of clutch plunger cylinder in described processing unit 11;
Secondary speed detection unit 12 for, detect secondary speed signal;
Oil temperature detection unit 13 for, detect oil temperature signal;
Receiving element 14 for, receive the secondary speed signal that secondary speed detection unit 12 sends, receive the oil temperature signal that oil temperature detection unit 13 sends, and, receive the Engine torque that electronic control unit ECU2 sends;
Processing unit 11 specifically for, according to the actual secondary speed variance ratio of secondary speed calculated signals that receiving element 14 receives; And, according to the area of described actual secondary speed variance ratio, Engine torque, oil temperature signal, the moment radius of clutch friction plate, the spring force of clutch retraction springs and clutch plunger cylinder, calculate feed-forward target oil pressure.
Preferably, the corresponding relation of the correction value of oil temperature and feed-forward target oil pressure is also preset with in processing unit 11;
Processing unit 11 specifically for, according to the area of the moment radius of actual secondary speed variance ratio, Engine torque, clutch friction plate, the spring force of clutch retraction springs and clutch plunger cylinder, calculate feed-forward target oil pressure theoretical value, according to described oil temperature signal and the oil temperature preset and the corresponding relation of oil pressure correction value, obtain the oil pressure correction value that described oil temperature signal is corresponding, and calculate described feed-forward target oil pressure theoretical value and described oil pressure correction value sum, obtain feed-forward target oil pressure.
Further, this clutch oil pressure control device 1 also comprises: timing unit 15 and accelerator open degree detection unit 16, and timing unit 15 is for recording the clutch combination time in each gearshift cycle; Accelerator open degree detection unit 16 for, detect accelerator opening amount signal;
Corresponding relation between the reference value being also preset with accelerator open degree and target turbine relative speed variation in processing unit 11, and the corresponding relation of the correction value of target turbine relative speed variation and clutch combination time and oil temperature;
Receiving element 14 also for, receive the accelerator opening amount signal that accelerator open degree detection unit 16 sends;
Processing unit 11 also for, the clutch combination time in the last gearshift cycle that the accelerator opening amount signal received according to receiving element 14, timing unit 15 record, current oil temperature signal that receiving element 14 receives and the correction value of default oil temperature signal and default target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature, calculate target turbine relative speed variation, and according to described target turbine relative speed variation and actual secondary speed variance ratio, obtain feedback target oil pressure.
Preferably, processing unit 11 specifically for, according to the corresponding relation between described accelerator opening amount signal and the reference value of default accelerator open degree and target turbine relative speed variation, obtain the reference value of target turbine relative speed variation corresponding to described accelerator opening amount signal; The corresponding relation of the clutch combination time in last gearshift cycle recorded according to timing unit 15, current oil temperature signal and default target turbine relative speed variation correction value and clutch combination time and oil temperature, the correction value of acquisition target turbine relative speed variation; Calculate the reference value of described target turbine relative speed variation and the correction value sum of described target turbine relative speed variation, obtain target turbine relative speed variation; And, according to the difference of described target turbine relative speed variation and actual secondary speed variance ratio, carry out PID adjustment, obtain feedback target oil pressure.
Further, this clutch oil pressure control device 1 also comprises transmitting element 17;
Processing unit 11 also for, instruction transmitting element 17 send the clutch pressure calculated to Clutch Control solenoid valve 3.
Be understandable that, the illustrative embodiments that above mode of execution is only used to principle of the present invention is described and adopts, but the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (6)
1. a clutch pressure controlling method, is characterized in that, described method comprises:
Calculate feed-forward target oil pressure and feedback target oil pressure;
According to described feed-forward target oil pressure and described feedback target oil pressure, calculate clutch pressure;
Described calculating feed-forward target oil pressure, specifically comprises:
Obtain secondary speed signal, and according to the actual secondary speed variance ratio of described secondary speed calculated signals;
Obtain Engine torque and oil temperature signal, and according to described actual secondary speed variance ratio, Engine torque, oil temperature signal, and moment radius, the spring force of default clutch retraction springs, the area of default clutch plunger cylinder of the clutch friction plate preset, calculate feed-forward target oil pressure;
Described according to described actual secondary speed variance ratio, Engine torque, oil temperature signal, and the moment radius of clutch friction plate, the spring force of clutch retraction springs, the area of clutch plunger cylinder, calculate feed-forward target oil pressure, specifically comprise:
According to the area of described actual secondary speed variance ratio, Engine torque, the moment radius of clutch friction plate, the spring force of clutch retraction springs and clutch plunger cylinder, calculate the theoretical value of feed-forward target oil pressure;
According to the corresponding relation of correction value of described oil temperature signal and the oil temperature preset and feed-forward target oil pressure, obtain the correction value of feed-forward target oil pressure corresponding to described oil temperature signal;
Calculate the theoretical value of described feed-forward target oil pressure and the correction value sum of described feed-forward target oil pressure, obtain feed-forward target oil pressure.
2. the method for claim 1, is characterized in that, described method also comprises: the clutch combination time recording each gearshift cycle;
Described calculating feedback target oil pressure, specifically comprises:
Obtain accelerator opening amount signal and oil temperature signal, and according to the clutch combination time in the last gearshift cycle of described accelerator opening amount signal, corresponding relation between default accelerator open degree and the reference value of target turbine relative speed variation, record, default oil temperature signal and the correction value of default target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature, calculate target turbine relative speed variation;
According to described target turbine relative speed variation and actual secondary speed variance ratio, obtain feedback target oil pressure.
3. method as claimed in claim 2, it is characterized in that, the clutch combination time in the described last gearshift cycle according to described accelerator opening amount signal, corresponding relation between default accelerator open degree and the reference value of target turbine relative speed variation, record, default oil temperature signal and the correction value of default target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature, calculate target turbine relative speed variation, specifically comprise:
According to the corresponding relation between described accelerator opening amount signal and the reference value of default accelerator open degree and target turbine relative speed variation, obtain the reference value of target turbine relative speed variation corresponding to described accelerator opening amount signal;
According to the clutch combination time in the last gearshift cycle of record, described oil temperature signal and the correction value of default target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature, obtain the correction value of target turbine relative speed variation;
Calculate the reference value of described target turbine relative speed variation and the correction value sum of described target turbine relative speed variation, obtain target turbine relative speed variation;
Described according to described target turbine relative speed variation and actual secondary speed variance ratio, obtain feedback target oil pressure, specifically comprise:
According to the difference of described target turbine relative speed variation and actual secondary speed variance ratio, carry out PID adjustment, obtain feedback target oil pressure.
4. a clutch oil pressure control device, is characterized in that, comprising:
Processing unit, for calculating feed-forward target oil pressure and feedback target oil pressure, and according to described feed-forward target oil pressure and feedback target oil pressure, calculates clutch pressure;
Also comprise secondary speed detection unit, oil temperature detection unit and receiving element, in described processing unit, be preset with the moment radius of clutch friction plate, the spring force of clutch retraction springs, the area of clutch plunger cylinder;
Described secondary speed detection unit is used for, and detects secondary speed signal;
Described oil temperature detection unit is used for, and detects oil temperature signal;
Described receiving element is used for, and receives the secondary speed signal that secondary speed detection unit sends, and receives the oil temperature signal that oil temperature detection unit sends, and, receive the Engine torque that electronic control unit ECU sends;
Described processing unit specifically for, according to the actual secondary speed variance ratio of secondary speed calculated signals that receiving element receives; And, according to the area of described actual secondary speed variance ratio, Engine torque, oil temperature signal, the moment radius of clutch friction plate, the spring force of clutch retraction springs and clutch plunger cylinder, calculate feed-forward target oil pressure;
The corresponding relation of the correction value of oil temperature and feed-forward target oil pressure is also preset with in described processing unit;
Described processing unit specifically for, according to the area of the moment radius of actual secondary speed variance ratio, Engine torque, clutch friction plate, the spring force of clutch retraction springs and clutch plunger cylinder, calculate feed-forward target oil pressure theoretical value, according to described oil temperature signal and the oil temperature preset and the corresponding relation of oil pressure correction value, obtain the oil pressure correction value that described oil temperature signal is corresponding, and calculate described feed-forward target oil pressure theoretical value and described oil pressure correction value sum, obtain feed-forward target oil pressure.
5. device as claimed in claim 4, it is characterized in that, also comprise timing unit and accelerator open degree detection unit, described timing unit is used for, and records the clutch combination time in each gearshift cycle; Described accelerator open degree detection unit is used for, and detects accelerator opening amount signal;
Corresponding relation between the reference value being also preset with accelerator open degree and target turbine relative speed variation in described processing unit, and the corresponding relation of the correction value of target turbine relative speed variation and clutch combination time and oil temperature;
Described receiving element also for, receive the accelerator opening amount signal that accelerator open degree detection unit sends;
Described processing unit also for, the accelerator opening amount signal received according to receiving element, the clutch combination time in the last gearshift cycle of timing unit record, current oil temperature signal that receiving element receives and the correction value of default oil temperature signal and default target turbine relative speed variation and the corresponding relation of clutch combination time and oil temperature, calculate target turbine relative speed variation, and according to described target turbine relative speed variation and actual secondary speed variance ratio, obtain feedback target oil pressure.
6. device as claimed in claim 5, it is characterized in that, described processing unit specifically for, according to the corresponding relation between described accelerator opening amount signal and the reference value of default accelerator open degree and target turbine relative speed variation, obtain the reference value of target turbine relative speed variation corresponding to described accelerator opening amount signal; According to the corresponding relation of the clutch combination time in the last gearshift cycle of described timing unit record, current oil temperature signal and default target turbine relative speed variation correction value and clutch combination time and oil temperature, obtain the correction value of target turbine relative speed variation; Calculate the reference value of described target turbine relative speed variation and the correction value sum of described target turbine relative speed variation, obtain target turbine relative speed variation; And, according to the difference of described target turbine relative speed variation and actual secondary speed variance ratio, carry out PID adjustment, obtain feedback target oil pressure.
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| US10415659B2 (en) * | 2015-07-24 | 2019-09-17 | Jtekt Corporation | Clutch apparatus and control method for clutch apparatus |
| CN105422681B (en) * | 2015-12-30 | 2018-02-16 | 中国船舶重工集团公司第七一一研究所 | Hydro-viscous speed governing clutch control method based on dynamic PID control |
| CN105782286B (en) * | 2016-04-11 | 2017-11-28 | 安徽江淮汽车集团股份有限公司 | A kind of oil-filled self-adaptation control method and system for wet clutch |
| JP6837416B2 (en) * | 2017-11-27 | 2021-03-03 | 本田技研工業株式会社 | Clutch control device |
| CN109973643B (en) * | 2019-03-29 | 2020-06-02 | 吉林大学 | Automatic transmission idle neutral gear control method based on feedforward PID |
| CN114576282B (en) * | 2022-02-22 | 2024-04-12 | 潍柴雷沃智慧农业科技股份有限公司 | Clutch oil pressure control method and device, electronic equipment, medium and tractor |
| CN114967791A (en) * | 2022-06-30 | 2022-08-30 | 日立电梯（中国）有限公司 | Temperature control method, system, apparatus, computer device, medium and product |
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| US5439428A (en) * | 1994-02-22 | 1995-08-08 | Eaton Corporation | Method and apparatus for robust automatic clutch control with pid regulation |
| JPH1193980A (en) * | 1997-09-19 | 1999-04-06 | Kubota Corp | Work vehicle |
| JP3635394B2 (en) * | 1998-06-23 | 2005-04-06 | 株式会社日立製作所 | Control device for automatic transmission for vehicle |
| JP4945139B2 (en) * | 2006-01-27 | 2012-06-06 | 日立オートモティブシステムズ株式会社 | Automotive control device |
| JP5266843B2 (en) * | 2008-03-31 | 2013-08-21 | アイシン・エィ・ダブリュ株式会社 | Control device for clutch |
| JP5463500B2 (en) * | 2010-10-28 | 2014-04-09 | ジヤトコ株式会社 | Hydraulic control device |
| KR101326850B1 (en) * | 2012-10-04 | 2013-11-11 | 기아자동차주식회사 | System and method for controlling an oil pump |
| CN103277428B (en) * | 2013-05-31 | 2015-06-03 | 安徽江淮汽车股份有限公司 | Wet dual-clutch automatic transmission and precharging pressure control method thereof |
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Effective date of registration: 20160303 Address after: 241006 Wuhu economic and Technological Development Zone, Anhui, No. 8 Changchun Road Applicant after: CHERY AUTOMOBILE CO., LTD. Address before: 241006 Wuhu economic and Technological Development Zone, Anhui, No. 8 Changchun Road Applicant before: Saic Chery Automobile Co., Ltd. |
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Address after: 241000 Anhui city of Wuhu Province, Hunan Road economic and Technological Development Zone No. 11 Patentee after: Wuhu WanLiYang transmission Co., Ltd. Address before: 241006 Wuhu economic and Technological Development Zone, Anhui, No. 8 Changchun Road Patentee before: CHERY AUTOMOBILE CO., LTD. |