CN104049650A - Wet-type DCT clutch temperature control system based on fuzzy control and control method thereof - Google Patents
Wet-type DCT clutch temperature control system based on fuzzy control and control method thereof Download PDFInfo
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Abstract
The invention discloses a wet-type DCT clutch temperature control system based on fuzzy control and a control method of the wet-type DCT clutch temperature control system. The system is composed of a sensor detection module, a signal processing module and a master control module. The method comprises the steps that after the temperature of oil thrown out of an oil outlet of a wet-type DCT clutch, the rotating speed of an input shaft of a transmission, the rotating speed of a driven disk of a first clutch, the rotating speed of a driven disk of a second clutch, the pressure of the first clutch and the pressure of the second clutch are collected in real time, whether the temperature of the oil thrown out of the oil outlet of the wet-type DCT clutch is larger than or equal to a threshold is judged; if the temperature of the oil thrown out of the oil outlet of the wet-type DCT clutch is smaller than the threshold, a current constant control mode of a cooling solenoid valve is switched to; if the temperature of the oil thrown out of the oil outlet of the wet-type DCT clutch is larger than or equal to the threshold, calculated clutch temperature deviation delta Tc, clutch temperature deviation change rate d delta Tc/dt and sliding friction power P are used as input variables for fuzzy control, a three-input single-output fuzzy control mode is switched to, and the current of the cooling solenoid valve is obtained. The wet-type DCT clutch temperature control system based on fuzzy control is simple, convenient and fast to use and capable of achieving quick and accurate control over clutch temperature.
Description
Technical Field
The invention relates to a temperature control system and a temperature control method for a wet DCT (discrete cosine transformation) clutch, in particular to a temperature control system and a temperature control method for a wet DCT clutch based on fuzzy control.
Background
Currently, there are two types of transmissions that are widely used in conventional motor vehicles. One is a manual transmission, which changes the transmission ratio by shifting a gear lever to switch the gear engagement position in the transmission, thereby achieving the purpose of speed change; with such a manual transmission, a driver needs to frequently operate a clutch pedal and a shift lever during driving, which tends to cause a feeling of fatigue to the driver, thereby affecting the safety of driving. The other is an automatic transmission, which can automatically change the gear transmission ratio according to the vehicle state, reduce the burden of a driver, improve the driving safety, and adapt to various driving road conditions and driving styles. Therefore, vehicles equipped with automatic transmissions are becoming one of the trends in the automotive industry.
Common automatic transmissions for automobiles can be divided into four types: a hydraulic Automatic Transmission (AT), an electric control mechanical automatic transmission (AMT), a Continuously Variable Transmission (CVT) and a double-clutch automatic transmission (DCT). Among them, DCT is a new automatic transmission concerned by automobile enterprises and researchers at home and abroad in recent years, and realizes power shift by a structure in which a double clutch controls odd-numbered gears and even-numbered gears, respectively. Compared with other automatic transmissions, the DCT inherits the advantage of high fuel efficiency of the AMT, keeps the advantage of smooth gear shifting of the AT and the CVT, and has better dynamic property due to very short gear shifting time, thereby having wide application range and better market prospect.
According to the type of the clutch adopted by the double clutch part in the DCT, the DCT can be divided into a dry DCT and a wet DCT. Although the dry DCT has the characteristics of compact structure, high transmission efficiency, and the like, the dry DCT is likely to generate local high temperature due to its small heat capacity, no forced cooling device, and poor heat dissipation, thereby shortening the service life. In comparison, although the wet DCT clutch has uniform pressure distribution, can accurately control the transmission torque of the clutch, allows long-time starting friction and high-gear starting, has mature technology and wide application, but needs to be equipped with a cooling oil forced heat dissipation system, and has large heat capacity.
Due to the large number of friction pairs in wet DCT, a large amount of heat energy is generated during frequent bond separation. In addition, since the heat capacity itself is large, the rate of heat change is slow, and when the engagement/disengagement time is short, the clutch friction pair cannot be sufficiently cooled, and heat accumulation occurs. Excessive temperatures can affect the control accuracy of the clutch, accelerate wear and thermal failure of the clutch, and affect the life of the clutch. Meanwhile, the cooling oil is deteriorated beyond the temperature range due to the overhigh temperature of the clutch. Therefore, it is important to be able to effectively control the wet DCT clutch temperature.
At present, a vehicle equipped with a wet DCT actually controls the clutch temperature according to a table look-up method, that is, according to the temperature of the oil thrown out from the oil outlet of the clutch measured by a clutch temperature sensor, the required flow of the cooling solenoid valve is obtained by querying a manually set temperature-cooling flow meter, and then according to the current-flow characteristic curve of the cooling solenoid valve itself, the corresponding current value of the cooling solenoid valve is obtained, thereby controlling the clutch temperature. The cooling electromagnetic valve is an electro-hydraulic proportional valve, and the current of the electromagnetic valve is in inverse proportion to the cooling flow. However, the adopted clutch temperature sensor is a thermistor sensor, the approximate transfer function of the sensor is a first-order inertia link, and the sensor has large hysteresis, namely the current temperature can be accurately reflected by the sensor after a period of time, and the common hysteresis time is more than 0.5s, so that the clutch is easily cooled untimely and insufficiently, and the friction plate is damaged. In addition, because the clutch temperature control system has the characteristics of nonlinearity, complexity, dynamics and the like, the control precision is low due to the control mode of the table lookup method, the change rate of the clutch temperature is not inhibited, the temperature fluctuation is large, and the normal work of the clutch is influenced.
Therefore, there is a need in the art for a method for controlling the temperature of a wet DCT clutch that can achieve fast and accurate control of the clutch temperature to control the clutch temperature rise, extend its life, and improve the operating performance of the DCT vehicle.
Disclosure of Invention
The invention provides a wet DCT clutch temperature control system based on fuzzy control, aiming at overcoming the defects of reaction delay and low clutch temperature control precision of a clutch oil temperature sensor in the prior art.
Another technical problem to be solved by the present invention is to provide a control method of the above-mentioned wet DCT clutch temperature control system based on fuzzy control.
In order to solve the technical problem of the invention, the adopted technical scheme is as follows: the wet DCT clutch temperature control system based on fuzzy control comprises the collection of the temperature of the oil thrown out from the oil outlet of the clutch and the output control of the current of a cooling solenoid valve, in particular,
the control system is composed of a control system,
the sensor detection module is used for acquiring the temperature of oil thrown out of a clutch oil outlet of the wet DCT, the rotating speed of an input shaft of the transmission, the rotating speed of a driven disc of the clutch 1, the rotating speed of a driven disc of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2;
the signal processing module is used for carrying out filtering and shaping processing on the signals acquired by the sensor detection module so as to inhibit noise interference and improve signal quality, and outputting the signals to the main control module;
a main control module, which is composed of a computing module and a control module, wherein,
the calculating module is used for calculating the temperature deviation of the clutch, the temperature deviation change rate of the clutch and the slip power according to the temperature of the oil thrown out from the oil outlet of the clutch, the rotating speed of the input shaft of the speed changer, the rotating speed of the driven disc of the clutch 1, the rotating speed of the driven disc of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2 after being processed by the signal processing module,
and the control module is used for judging an applicable control mode according to the signal processed by the signal processing module and the calculation result of the calculation module, and calculating and sending a corresponding current signal to the cooling electromagnetic valve.
As a further improvement of the fuzzy control based wet DCT clutch temperature control system:
the sensor detection module preferably comprises a clutch oil temperature sensor, a transmission input shaft rotating speed sensor, a clutch 1 driven disc rotating speed sensor, a clutch 2 driven disc rotating speed sensor, a clutch 1 pressure sensor and a clutch 2 pressure sensor.
In order to solve another technical problem of the present invention, another technical solution is adopted: the control method of the wet DCT clutch temperature control system based on fuzzy control comprises the real-time acquisition of the temperature of the oil thrown out from the oil outlet of the clutch and the output control of the current of the cooling solenoid valve, and particularly comprises the following main steps:
step 1, setting the threshold value of the clutch temperature to be more than or equal to 70 ℃;
step 2, acquiring the oil throwing-out temperature of a clutch oil outlet of the wet DCT, the rotating speed of an input shaft of the transmission, the rotating speed of a driven disc of the clutch 1, the rotating speed of a driven disc of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2 in real time, and judging whether the oil throwing-out temperature of the clutch oil outlet is not less than a threshold value? If the temperature of the oil thrown out from the oil outlet of the clutch is less than the threshold value, switching to a constant current control mode of a cooling solenoid valve, and if the temperature of the oil thrown out from the oil outlet of the clutch is more than or equal to the threshold value, switching to a three-input single-output fuzzy control mode;
step 3, the three-input single-output fuzzy control mode comprises the following processes,
step 3.1, calculating the temperature of the oil thrown out of the oil outlet of the clutch, the rotating speed of the input shaft of the speed changer, the rotating speed of the driven disc of the clutch 1, the rotating speed of the driven disc of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2 to obtain the temperature deviation delta T of the clutchcClutch temperature deviation change rate d Δ TcDt and slip power P, and deviation of the clutch temperature by Delta TcClutch temperature deviation change rate d Δ TcThe method comprises the steps of taking/dt and sliding power P as input variables, taking cooling solenoid valve current I as an output variable, setting fuzzy sets of the input and output variables and argument ranges thereof,
step 3.2, firstly, the temperature deviation delta T of the clutchcClutch temperature deviation change rate d Δ TcThe/dt and the sliding power P are used as input variables of fuzzy control, are converted into respective discourse domain ranges through scales, and then respective fuzzy values are obtained through a membership function of normal distribution,
and 3.3, carrying out fuzzy reasoning according to a Mamdani reasoning method by using the fuzzy value of the input variable and a set fuzzy control rule, carrying out fuzzy synthesis operation according to a MIN-MAX method to obtain an output variable, converting the output variable into an accurate quantity by using a gravity center method, and converting the accurate quantity into an actual output range by using scale conversion to obtain the current of the cooling solenoid valve.
The control method of the wet DCT clutch temperature control system based on fuzzy control is further improved as follows:
preferably, the current of the cooling solenoid valve in the constant current control mode of the cooling solenoid valve is 1100 mA.
Preferably, the clutch temperature deviation Δ T is calculatedcIs represented by the formula ofc＝Tc-ToT in the formulacFor the temperature T of the oil thrown out of the oil outlet of the clutchoIs a temperature threshold.
Preferably, the rate of change of clutch temperature deviation, d Δ T, is calculatedcThe formula of/dt is
Delta T in the formulac(k-1) Clutch temperature deviation, Δ T, collected at the k-1 st timec(k) And the clutch temperature deviation is acquired at the kth time, and delta t is a sampling period of the clutch temperature deviation.
Preferably, the formula for calculating the sliding friction power P is
Δ ω in the formulacrIs the difference in rotational speed of the transmission input shaft and the clutch driven plate, sign (Δ ω)cr) In order to be a function of the sign, <math>
<mrow>
<mi>sign</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>Δω</mi>
<mi>cr</mi>
</msub>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mfenced open='{' close=''>
<mtable>
<mtr>
<mtd>
<mn>1</mn>
<mo>,</mo>
</mtd>
<mtd>
<msub>
<mi>Δω</mi>
<mi>cr</mi>
</msub>
<mo>></mo>
<mn>0</mn>
</mtd>
</mtr>
<mtr>
<mtd>
<mo>-</mo>
<mn>1</mn>
<mo>,</mo>
</mtd>
<mtd>
<msub>
<mi>Δω</mi>
<mi>cr</mi>
</msub>
<mo>≤</mo>
<mn>0</mn>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
</mrow>
</math> μdthe dynamic friction coefficient of the friction plate of the wet clutch, S is the acting area of the clutch piston, PnIs the pressure applied per unit area of the clutch piston, Z is the pressure offNumber of friction pairs of clutch R0、R1The outer diameter and the inner diameter of the friction plate of the clutch are respectively.
Preferably, the clutch temperature deviation Δ TcIs { VST, ST, RST, MT, RBT, BT, VBT }, and the rate of change of clutch temperature deviation, d Δ TcThe fuzzy set of/dt is { NB, NM, NS, O, PS, PM, PB }, the fuzzy set of sliding power P is { VSP, SP, MP, RBP, BP, VBP }, the fuzzy set of cooling solenoid current I is { VSI, SI, MI, RBI, BI, VBI },
clutch temperature deviation Δ TcHas a basic discourse field of [0,70 ]]The domain of discourse is [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14]Then the quantization factor k1When 14/70 is 0.2, the rate of change of clutch temperature deviation d Δ TcThe basic discourse area of/dt is [ -20,20]The universe of discourse is [ -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6]Then the quantization factor k2When 6/20 is 0.3, the fundamental domain of sliding power P is 0,20]The universe of discourse is [0,1,2,3,4,5,6,7,8,9,10]Then the quantization factor k3At 10/20, 0.5, the basic universe of cooling solenoid current I is [0, 1200 ═ 0.5]The domain of discourse is [0,1,2,3,4,5,6,7,8,9,10,11,12]Then the scale factor k4＝1200/12＝100。
Preferably, the membership function of the normal distribution is
Preferably, the fuzzy control rules are as shown in the following table,
the regular sentence conjunction words and adopt intersection operation, and the sentence conjunction words also adopt union operation.
Compared with the prior art, the beneficial effects are that:
the temperature of the wet DCT clutch is controlled by using the temperature control device in a rack environment, so that the defects of reaction delay and low control precision of the temperature of the clutch existing in the prior art of the clutch oil temperature sensor are overcome, and the temperature of the wet DCT clutch is controlled quickly and accurately.
Drawings
Fig. 1 is a schematic diagram of a basic structure of a control system of the present invention.
Fig. 2 is a process diagram of a basic step of the control method of the present invention.
Fig. 3 is a process diagram of the fuzzy control in the control method of the present invention.
Fig. 4 is a diagram illustrating an effect of controlling a clutch of a wet DCT according to the present invention. Wherein FIG. 4a is a clutch temperature deviation curve; FIG. 4b is a clutch slip power curve; FIG. 4c is a graph of clutch temperature deviation rate of change; fig. 4d is a cooling solenoid current curve.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which are illustrative only and are not to be construed as limiting the invention.
Referring to fig. 1, the wet DCT clutch temperature control system based on fuzzy control is disposed outside an automatic transmission electronic control unit (TCU), and includes a sensor detection module, a signal processing module, and a main control module, wherein the main control module includes a calculation module and a control module. Wherein,
the sensor detection module is used for acquiring the temperature of oil thrown out of a clutch oil outlet of the wet DCT, the rotating speed of an input shaft of the transmission, the rotating speed of a driven disc of the clutch 1, the rotating speed of a driven disc of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2; the sensor detection module typically obtains information using a clutch oil temperature sensor, a transmission input shaft speed sensor, a clutch 1 driven plate speed sensor, a clutch 2 driven plate speed sensor, a clutch 1 pressure sensor, and a clutch 2 pressure sensor. Alternatively, the temperature of the oil exiting the oil outlet of the clutch, the speed of the transmission input shaft, the speed of the driven disk of the clutch 1, the speed of the driven disk of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2 CAN also be determined from other modules of the vehicle via a communication bus (for example a CAN bus), in which case the communication module adapted to this bus CAN be embedded inside the TCU.
And the signal processing module is used for carrying out filtering and shaping processing on the signals acquired by the sensor detection module so as to inhibit noise interference and improve signal quality, and outputting the signals to the main control module.
And the calculating module in the main control module is used for calculating the temperature deviation of the clutch, the temperature deviation change rate of the clutch and the slip power according to the temperature of the oil thrown out of the oil outlet of the clutch, the rotating speed of the input shaft of the transmission, the rotating speed of a driven plate of the clutch 1, the rotating speed of a driven plate of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2 which are processed by the signal processing module. The sampling period of the clutch temperature deviation in this embodiment is 10 ms.
A control module in a main control module mainly relates to two control modes, namely a cooling electromagnetic valve current constant control mode and a three-input single-output fuzzy control mode. The three inputs refer to clutch temperature deviation, clutch temperature deviation change rate and sliding power, and the single output refers to cooling solenoid valve current. The two control modes can be mutually converted under certain conditions.
Referring to fig. 2 and 3, the control method of the invention comprises the steps of real-time acquisition of temperature of oil thrown from an oil outlet of a clutch and output control of current of a cooling solenoid valve, and comprises the following main steps:
step 1, setting the threshold value of the clutch temperature to be more than or equal to 70 ℃.
Step 2, acquiring the oil throwing-out temperature of a clutch oil outlet of the wet DCT, the rotating speed of an input shaft of the transmission, the rotating speed of a driven disc of the clutch 1, the rotating speed of a driven disc of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2 in real time, and judging whether the oil throwing-out temperature of the clutch oil outlet is not less than a threshold value? And if the temperature of the oil thrown out of the oil outlet of the clutch is less than the threshold value, switching to a constant current control mode of the cooling electromagnetic valve, namely setting the current of the cooling electromagnetic valve to be 1100 mA. If the temperature of the oil thrown out of the oil outlet of the clutch is larger than or equal to the threshold value, a three-input single-output fuzzy control mode is adopted.
Step 3, the three-input single-output fuzzy control mode comprises the following processes,
step 3.1, calculating the temperature of the oil thrown out of the oil outlet of the clutch, the rotating speed of the input shaft of the speed changer, the rotating speed of the driven disc of the clutch 1, the rotating speed of the driven disc of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2 to obtain the temperature deviation delta T of the clutchcClutch temperature deviation change rate d Δ Tc(ii) dt and a slip power P; wherein,
calculating clutch temperature deviation delta TcIs represented by the formula ofc＝Tc-ToT in the formulacFor the temperature T of the oil thrown out of the oil outlet of the clutchoIs a temperature threshold.
Calculating the clutch temperature deviation change rate d delta TcThe formula of/dt is
Delta T in the formulac(k-1) Clutch temperature deviation, Δ T, collected at the k-1 st timec(k) And the clutch temperature deviation is acquired at the kth time, and delta t is a sampling period of the clutch temperature deviation.
The formula for calculating the sliding friction power P is as follows
Δ ω in the formulacrIs the difference in rotational speed of the transmission input shaft and the clutch driven plate, sign (Δ ω)cr) In order to be a function of the sign, <math>
<mrow>
<mi>sign</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>Δω</mi>
<mi>cr</mi>
</msub>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mfenced open='{' close=''>
<mtable>
<mtr>
<mtd>
<mn>1</mn>
<mo>,</mo>
</mtd>
<mtd>
<msub>
<mi>Δω</mi>
<mi>cr</mi>
</msub>
<mo>></mo>
<mn>0</mn>
</mtd>
</mtr>
<mtr>
<mtd>
<mo>-</mo>
<mn>1</mn>
<mo>,</mo>
</mtd>
<mtd>
<msub>
<mi>Δω</mi>
<mi>cr</mi>
</msub>
<mo>≤</mo>
<mn>0</mn>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
</mrow>
</math> μdthe dynamic friction coefficient of the friction plate of the wet clutch, S is the acting area of the clutch piston, PnIs the pressure acting on the piston of the clutch per unit area, Z is the number of friction pairs of the clutch, R0、R1The outer diameter and the inner diameter of the friction plate of the clutch are respectively.
And deviation of the clutch temperature by DeltaTcClutch temperature deviation change rate d Δ TcAnd the current I of the cooling electromagnetic valve is used as an output variable, and a fuzzy set of each input and output variable and the range of the fuzzy set are set. Wherein,
clutch temperature deviation Δ TcIs { VST, ST, RST, MT, RBT, BT, VBT }, and the rate of change of clutch temperature deviation, d Δ TcThe fuzzy set of/dt is { NB, NM, NS, O, PS, PM, PB }, the fuzzy set of sliding power P is { VSP, SP, MP, RBP, BP, VBP }, the fuzzy set of cooling solenoid current I is { VSI, SI, MI, RBI, BI, VBI },
clutch temperature deviation Δ TcHas a basic discourse field of [0,70 ]]The domain of discourse is [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14]Then the quantization factor k1When 14/70 is 0.2, the clutch temperature deviation changesConversion rate d Δ TcThe basic discourse area of/dt is [ -20,20]The universe of discourse is [ -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6]Then the quantization factor k2When 6/20 is 0.3, the fundamental domain of sliding power P is 0,20]The universe of discourse is [0,1,2,3,4,5,6,7,8,9,10]Then the quantization factor k3At 10/20, 0.5, the basic universe of cooling solenoid current I is [0, 1200 ═ 0.5]The domain of discourse is [0,1,2,3,4,5,6,7,8,9,10,11,12]Then the scale factor k4＝1200/12＝100。
Step 3.2, firstly, the temperature deviation delta T of the clutchcClutch temperature deviation change rate d Δ TcThe method comprises the following steps that the/dt and the sliding power P are used as input variables of fuzzy control and are converted into respective discourse domain ranges through scales; then obtaining respective fuzzy values through a membership function of normal distribution; wherein the membership function of the normal distribution is <math>
<mrow>
<mi>μ</mi>
<mrow>
<mo>(</mo>
<mi>x</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mi>exp</mi>
<mo>[</mo>
<mo>-</mo>
<mfrac>
<msup>
<mrow>
<mo>(</mo>
<mi>x</mi>
<mo>-</mo>
<mi>a</mi>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
<mrow>
<mn>2</mn>
<msup>
<mi>σ</mi>
<mn>2</mn>
</msup>
</mrow>
</mfrac>
<mo>]</mo>
<mo>.</mo>
</mrow>
</math>
3.3, firstly carrying out fuzzy reasoning according to a Mamdani reasoning method by using a fuzzy value of an input variable and a set fuzzy control rule, and carrying out fuzzy synthesis operation according to a MIN-MAX method to obtain an output variable; wherein, the fuzzy control rule is shown in the following table,
the regular sentence conjunction and adopts intersection operation, the sentence conjunction also adopts union operation, and the fuzzy implication relation of the Mamdani inference method is expressed by Cartesian product.
Converting the output variable into an accurate quantity by a gravity center method, then converting the accurate quantity into an actual output range by scale transformation to obtain the current of the cooling solenoid valve, namely, adopting the gravity center method for non-fuzzification to finally obtain an accurate value of the output quantity, and then multiplying the accurate value by the scale factor k in the step 3.14And obtaining the current value of the cooling electromagnetic valve.
To verify the effectiveness of the present invention, the temperature control of the wet DCT clutch was verified in a bench environment by a control system embedded in the TCU. The control effect diagram shown in fig. 4 is obtained, and it can be seen from the diagram that the control method of the present invention has a good inhibition effect on the change rate of the clutch temperature and the change of the slip power, has strong robustness, and can realize the fast and accurate control of the clutch temperature.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the scope of the drawings, and all equivalent embodiments modified or modified according to the idea of the present invention should fall within the scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.
Claims (10)
1. The utility model provides a wet-type DCT clutch temperature control system based on fuzzy control, includes the collection of clutch oil-out throw-out oil temperature and the output control of cooling solenoid valve electric current, its characterized in that:
the control system is composed of a control system,
the sensor detection module is used for acquiring the temperature of oil thrown out of a clutch oil outlet of the wet DCT, the rotating speed of an input shaft of the transmission, the rotating speed of a driven disc of the clutch 1, the rotating speed of a driven disc of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2;
the signal processing module is used for carrying out filtering and shaping processing on the signals acquired by the sensor detection module so as to inhibit noise interference and improve signal quality, and outputting the signals to the main control module;
a main control module, which is composed of a computing module and a control module, wherein,
the calculating module is used for calculating the temperature deviation of the clutch, the temperature deviation change rate of the clutch and the slip power according to the temperature of the oil thrown out from the oil outlet of the clutch, the rotating speed of the input shaft of the speed changer, the rotating speed of the driven disc of the clutch 1, the rotating speed of the driven disc of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2 after being processed by the signal processing module,
and the control module is used for judging an applicable control mode according to the signal processed by the signal processing module and the calculation result of the calculation module, and calculating and sending a corresponding current signal to the cooling electromagnetic valve.
2. The fuzzy control based wet DCT clutch temperature control system of claim 1, wherein the sensor detection module comprises a clutch oil temperature sensor, a transmission input shaft speed sensor, a clutch 1 driven plate speed sensor, a clutch 2 driven plate speed sensor, a clutch 1 pressure sensor, and a clutch 2 pressure sensor.
3. The control method of the fuzzy control-based wet DCT clutch temperature control system of claim 1, comprising real-time collection of temperature of oil thrown from an oil outlet of the clutch and control of current of a cooling solenoid valve, and is characterized by mainly comprising the following steps:
step 1, setting the threshold value of the clutch temperature to be more than or equal to 70 ℃;
step 2, acquiring the oil throwing-out temperature of a clutch oil outlet of the wet DCT, the rotating speed of an input shaft of the transmission, the rotating speed of a driven disc of the clutch 1, the rotating speed of a driven disc of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2 in real time, and judging whether the oil throwing-out temperature of the clutch oil outlet is not less than a threshold value? If the temperature of the oil thrown out from the oil outlet of the clutch is less than the threshold value, switching to a constant current control mode of a cooling solenoid valve, and if the temperature of the oil thrown out from the oil outlet of the clutch is more than or equal to the threshold value, switching to a three-input single-output fuzzy control mode;
step 3, the three-input single-output fuzzy control mode comprises the following processes,
step 3.1, calculating the temperature of the oil thrown out of the oil outlet of the clutch, the rotating speed of the input shaft of the speed changer, the rotating speed of the driven disc of the clutch 1, the rotating speed of the driven disc of the clutch 2, the pressure of the clutch 1 and the pressure of the clutch 2 to obtain the temperature deviation delta T of the clutchcClutch temperature deviation change rate d Δ TcDt and slip power P, and deviation of the clutch temperature by Delta TcClutch temperature deviation change rate d Δ TcThe method comprises the steps of taking/dt and sliding power P as input variables, taking cooling solenoid valve current I as an output variable, setting fuzzy sets of the input and output variables and argument ranges thereof,
step 3.2, firstly, the temperature deviation delta T of the clutchcClutch temperature deviation change rate d Δ TcThe/dt and the sliding power P are used as input variables of fuzzy control, are converted into respective discourse domain ranges through scales, and then respective fuzzy values are obtained through a membership function of normal distribution,
and 3.3, carrying out fuzzy reasoning according to a Mamdani reasoning method by using the fuzzy value of the input variable and a set fuzzy control rule, carrying out fuzzy synthesis operation according to a MIN-MAX method to obtain an output variable, converting the output variable into an accurate quantity by using a gravity center method, and carrying out scale conversion to an actual output range to obtain the current of the cooling solenoid valve.
4. The control method of the fuzzy control based wet DCT clutch temperature control system of claim 3, wherein a current of the cooling solenoid valve in a constant current control of the cooling solenoid valve is 1100 mA.
5. The method of claim 3, wherein the clutch temperature deviation Δ T is calculatedcIs represented by the formula ofc＝Tc-ToT in the formulacFor the oil outlet of the clutch to be thrown outOil temperature, ToIs a temperature threshold.
6. The method as claimed in claim 3, wherein the clutch temperature deviation change rate d Δ T is calculatedcThe formula of/dt is
Delta T in the formulac(k-1) Clutch temperature deviation, Δ T, collected at the k-1 st timec(k) And the clutch temperature deviation is acquired at the kth time, and delta t is a sampling period of the clutch temperature deviation.
7. The method of claim 3, wherein the slip power P is calculated by the following formula
Δ ω in the formulacrIs the difference in rotational speed of the transmission input shaft and the clutch driven plate, sign (Δ ω)cr) In order to be a function of the sign, <math>
<mrow>
<mi>sign</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>Δω</mi>
<mi>cr</mi>
</msub>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mfenced open='{' close=''>
<mtable>
<mtr>
<mtd>
<mn>1</mn>
<mo>,</mo>
</mtd>
<mtd>
<msub>
<mi>Δω</mi>
<mi>cr</mi>
</msub>
<mo>></mo>
<mn>0</mn>
</mtd>
</mtr>
<mtr>
<mtd>
<mo>-</mo>
<mn>1</mn>
<mo>,</mo>
</mtd>
<mtd>
<msub>
<mi>Δω</mi>
<mi>cr</mi>
</msub>
<mo>≤</mo>
<mn>0</mn>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
</mrow>
</math> μdthe dynamic friction coefficient of the friction plate of the wet clutch, S is the acting area of the clutch piston, PnIs the pressure acting on the piston of the clutch per unit area, Z is the number of friction pairs of the clutch, R0、R1The outer diameter and the inner diameter of the friction plate of the clutch are respectively.
8. The method of claim 3, wherein the system is configured to control the wet DCT clutch temperature based on fuzzy control
Clutch temperature deviation Δ TcIs { VST, ST, RST, MT, RBT, BT, VBT }, and the rate of change of clutch temperature deviation, d Δ TcThe fuzzy set of/dt is { NB, NM, NS, O, PS, PM, PB }, the fuzzy set of sliding power P is { VSP, SP, MP, RBP, BP, VBP }, the fuzzy set of cooling solenoid current I is { VSI, SI, MI, RBI, BI, VBI },
clutch temperature deviation Δ TcHas a basic discourse field of [0,70 ]]The domain of discourse is [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14]Then the quantization factor k1When 14/70 is 0.2, the rate of change of clutch temperature deviation d Δ TcThe basic discourse area of/dt is [ -20,20]The universe of discourse is [ -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6]Then the quantization factor k2When 6/20 is 0.3, the fundamental domain of sliding power P is 0,20]The universe of discourse is [0,1,2,3,4,5,6,7,8,9,10]Then the quantization factor k3At 10/20, 0.5, the basic universe of cooling solenoid current I is [0, 1200 ═ 0.5]The domain of discourse is [0,1,2,3,4,5,6,7,8,9,10,11,12]Then the scale factor k4＝1200/12＝100。
9. The method of claim 3, wherein the normally distributed membership function is
10. The method of controlling a fuzzy control based wet DCT clutch temperature control system according to claim 3, wherein the fuzzy control rules are as shown in the following table,
the regular sentence conjunction words and adopt intersection operation, and the sentence conjunction words also adopt union operation.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4914924A (en) * | 1987-07-17 | 1990-04-10 | Nissan Motor Co., Ltd. | Vehicle air conditioning system based on fuzzy inference |
| CN1926361A (en) * | 2004-01-07 | 2007-03-07 | 克菲科公司 | Method for detecting fault of oil temperature sensor for automatic transmission |
| CN101008444A (en) * | 2006-01-27 | 2007-08-01 | 株式会社日立制作所 | Control device and control method for vehicle |
| CN101398074A (en) * | 2007-09-26 | 2009-04-01 | 加特可株式会社 | Shift control device for automatic transmission |
| CN101532565A (en) * | 2009-04-13 | 2009-09-16 | 同济大学 | Electronic control unit for wet double clutch type automatic gearbox |
| CN201982639U (en) * | 2011-04-08 | 2011-09-21 | 浙江万里扬变速器股份有限公司 | Electric control system of automatic dual clutch transmission |
-
2014
- 2014-05-27 CN CN201410233052.3A patent/CN104049650B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4914924A (en) * | 1987-07-17 | 1990-04-10 | Nissan Motor Co., Ltd. | Vehicle air conditioning system based on fuzzy inference |
| CN1926361A (en) * | 2004-01-07 | 2007-03-07 | 克菲科公司 | Method for detecting fault of oil temperature sensor for automatic transmission |
| CN101008444A (en) * | 2006-01-27 | 2007-08-01 | 株式会社日立制作所 | Control device and control method for vehicle |
| CN101398074A (en) * | 2007-09-26 | 2009-04-01 | 加特可株式会社 | Shift control device for automatic transmission |
| CN101532565A (en) * | 2009-04-13 | 2009-09-16 | 同济大学 | Electronic control unit for wet double clutch type automatic gearbox |
| CN201982639U (en) * | 2011-04-08 | 2011-09-21 | 浙江万里扬变速器股份有限公司 | Electric control system of automatic dual clutch transmission |
Non-Patent Citations (2)
| Title |
|---|
| 刘振军等: "湿式双离合器自动变速器换挡控制与仿真分析", 《重庆大学学报》, vol. 34, no. 1, 31 January 2011 (2011-01-31), pages 7 - 13 * |
| 孙伟等: "湿式DCT换挡过程油液温度修正实验研究", 《科学技术与工程》, vol. 13, no. 13, 31 May 2013 (2013-05-31), pages 3715 - 3717 * |
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