CN101614254A - Little cunning in wet clutch locking when engagement controlling method of rubbing - Google Patents
Little cunning in wet clutch locking when engagement controlling method of rubbing Download PDFInfo
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- CN101614254A CN101614254A CN200910047208A CN200910047208A CN101614254A CN 101614254 A CN101614254 A CN 101614254A CN 200910047208 A CN200910047208 A CN 200910047208A CN 200910047208 A CN200910047208 A CN 200910047208A CN 101614254 A CN101614254 A CN 101614254A
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Abstract
Little cunning when the invention discloses the engagement of a kind of wet clutch locking controlling method of rubbing at first, reads current throttle opening and engine speed; The second, look into little cunning velocity diagram that rubs, drawing the optimum sliding speed of rubbing of target is MicroSlip Speed; The 3rd, it is poor to calculate present engine and gearbox input shaft rotational speed; The 4th, calculate the current rotational speed N that needs adjusting; The 5th, regulate through suitable PID, speed discrepancy is converted to corresponding electric current changing value, i.e. the associated solenoid valve of the current solenoidoperated cluthes electric current Δ I that need regulate; The 6th, the electric current Δ I that current clutch solenoid valve need be regulated adds existing effective current this moment, the optimal control current of solenoid valve when the little cunning of calculating clutch is rubbed the engagement locking.The present invention can effectively reduce shift impact, reduces oil consumption in frequent shift process, and can significantly improve the reliability and the working life of clutch work.
Description
Technical field
The present invention relates to a kind of controlling method, the controlling method of rubbing of the little cunning during the particularly a kind of wet clutch locking engagement that is applied to motor car engine and speed changer.
Background technique
So-called wet clutch is meant that clutch friction plate rubbing contact surface in the sliding process of rubbing shows as the friction at liquid and semiliquid interface, it compares the change that matter has been arranged with traditional dry clutch, promptly when sliding rubbing, friction surface does not directly come in contact, separated by the oil film of the very thin about 0.1mm of thickness of one deck between two friction surfaces, the oil film that this one deck is very thin has guaranteed that a pair of friction pair has little wearing and tearing and stable friction factor under very big positive pressure just, and breaking of oil film can make wearing and tearing sharply increase in the sliding process of rubbing, therefore compare with dry clutch, the control of wet clutch has tighter technical requirements, complicated more difficulty.
In the traditional design, wet clutch locking cunning is rubbed the power that guarantees engagement can be according to the Engine torque release that this moment, needs transmitted, and its formula is as follows:
F
n＝T
in/(n*A*R*mi*10
5)
Wherein: F
nThe pressure that the power clutch that needs during for the engagement of wet clutch in theory is subjected to, unit is bar;
T
InBe the Engine torque that wet clutch transmits, unit is Nm;
N is the quantity of rubbing surface, i.e. a number of friction pairs between platen and the driven disc in the clutch;
A is the surface area of clutch plunger, the m of unit
2
R is the effective radius of rubbing surface, and the m of unit is scaled frictional force and acts on this radius;
Mi is the friction factor of rubbing surface, and its value is subjected to influence of various factors such as slippage and current instantaneous oily temperature between clutch driving plate and the driven disc for dynamically measuring.
The theoretic result that the power of the locking engagement that above formula calculates just draws based on the wet clutch mechanical model, as shown in Figure 1.And because the uncertainty of friction factor dynamically changeable in the formula, be difficult to guarantee that clutch meshes fully, if unnecessary skidding takes place in the running process, to reduce the life-span and the reliability of wet clutch on the contrary, negative effect is played in the performance of wet clutch advantage, and this method shift impact is big, has reduced the driving comfortability of vehicle.
Also there is a small amount of document to propose to solve the inadequate problem of issuable engagement abroad by the controlling method of additional force (Surplus Pressure), promptly on the basis of above formula notional result, additionally increase certain power, but under this control in the hydraulic system oil pump need extra acting in order to produce additional force, can cause bigger energy loss, thereby the increasing oil consumption, the Economy of reduction car load.And the oil film that additional power will be beneficial to friction easily discharges from friction pair fully, and clutch unclamps sliding moment of rubbing and is prone to bigger friction subsequently, influences the working life of wet clutch.
At the problems that may exist in the above controlling method, the present invention proposes a kind of brand-new when the clutch locking mesh, allowing and have little cunning that minimum cunning rubs method of rubbing, realize that the optimum engagement of wet clutch controls.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of little cunning that guarantees the engagement of the more excellent locking of wet clutch controlling method of rubbing.
For solving the problems of the technologies described above, the controlling method of rubbing of the little cunning during wet clutch locking engagement that the present invention proposes comprises the steps,
At first, read current throttle opening (throttle position) and engine speed (Ne);
The second, look into little cunning velocity diagram that rubs according to described throttle opening and described engine speed, drawing the optimum sliding speed of rubbing of target is MicroSlip Speed;
The 3rd, it is poor to calculate present engine and gearbox input shaft rotational speed, i.e. Δ N=(Ne-N1);
The 4th, calculate the current rotational speed N that needs adjusting, N=MicroSlip Speed-Δ N;
The 5th, regulate through suitable PID, speed discrepancy is converted to corresponding electric current changing value, i.e. the associated solenoid valve of the current solenoidoperated cluthes electric current Δ I that need regulate;
The 6th, the electric current Δ I that current clutch solenoid valve need be regulated adds existing effective current this moment, the optimal control current of solenoid valve when the little cunning of calculating clutch is rubbed the engagement locking.
Rub when control carrying out the little cunning of clutch, most critical be exactly the cunning of the GPRS optimum speed of rubbing, promptly the optimum speed between clutch driving plate and the driven disc is poor, is improving systematic function and is reducing between the energy loss and seek optimal balance point.Above-mentioned little cunning velocity diagram that rubs is exactly by the wet clutch that adopts being carried out cunning that theoretical calculation and a large amount of tests draw the rub graph of a relation of speed and engine speed and throttle opening, i.e. optimum controlling point.
The present invention can effectively reduce shift impact, improves the travelling comfort of vehicle; In frequent shift process, energy loss is less, oil consumption is few, can effectively improve the Economy of vehicle; And the reliability and the working life of clutch work can have been significantly improved.
The present invention need not any hardware is changed, what unique needs were made is to revise control strategy, when the electric current of the solenoid valve of compute control clutch pressure, take the influence that little cunning is rubbed into consideration, dynamic characteristic with reference to different wet clutches, in control algorithm, increase the control strategy that little cunning is rubbed, and, regulate the speed that little cunning is rubbed, thereby realize optimal control by emulation and test etc.
Description of drawings
Fig. 1 is the wet clutch mechanical model of traditional design.
Fig. 2 is an operating procedure of the present invention.
Fig. 3 is the little cunning statistical form of velocity diagram before forming that rub.
Fig. 4 is according to little cunning that Fig. 3 obtains velocity diagram that rubs.
Fig. 5 is when having or not little cunning to rub control, the comparative result figure of shock extent.
Fig. 6 is a clutch moment of torque when being 50Nm, and little cunning is rubbed control down and the comparative result figure of the following power loss of additional force control.
Embodiment
Little cunning during hereinafter with reference to the accompanying drawings to wet clutch locking of the present invention engagement controlling method of rubbing is described in detail.
The present invention is directed to the deficiency and the defective of existing control strategy, proposed the rub strategy of solenoidoperated cluthes locking engagement of a kind of little cunning.
Little cunning speed of rubbing is a dynamically amount, mainly by the aperture of current closure and the rotating speed decision of motor.Before the design control strategy, need carry out theoretical calculation and a large amount of tests to the wet clutch that adopts and draw as shown in Figure 3 and Figure 4 little cunning velocity diagram that rubs.According to the aperture of current closure and the rotating speed of motor, tabling look-up obtains the optimum sliding speed of rubbing, and as the reference quantity in the strategy, and then calculates the optimal current of exporting solenoid valve during actual travel, thus solenoidoperated cluthes engagement locking power.
The control strategy flow process at first reads the aperture and the engine speed of current closure specifically as shown in Figure 2, looks into " little cunning rub velocity diagram " according to these two variablees and obtains target optimum sliding rub speed, i.e. MicroSlip Speed; And then calculate present engine and the gearbox input shaft rotational speed poor, i.e. Δ N=(Ne-N1), wherein, Ne is the rotating speed of present engine, N1 is the current input shaft rotational speed of gearbox; Again the optimum cunning is rubbed speed MicroSlip Speed and present engine and gearbox input shaft rotating speed poor Δ N relatively, obtain the current rotational speed N of regulating of needing, N=MicroSlip Speed-Δ N; Regulate through suitable PID subsequently, the rotating speed difference is converted into the electric current changing value, be i.e. the associated solenoid valve of the current solenoidoperated cluthes electric current Δ I that need regulate; Δ I again with the existing effective current addition, finally obtain under the different operating modes clutch locking when engagement, the optimal control current of solenoid valve.
From Fig. 5 and Fig. 6 as can be seen, the beneficial effect of above-mentioned controlling method.
Fig. 5 is the rub vibration situation of when control motor, clutch driving plate and transmission input shaft of the little cunning of clutch, as can be seen from the figure when having little cunning to rub control, shock extent is obviously little than there not being little cunning rub when control, and when motor adopts little cunning control strategy that rubs during at 1000～2000rpm the vibration of transmission input shaft is had clear improvement.
Fig. 6 is that the power loss comparison diagram is compared in the control that rubs of little cunning with additional force control, and little cunning slip speed that the power of control loss equals clutch that rubs multiply by Engine torque, i.e. P
Loss=Δ n * T
EngineAnd additional pressure when control, the oil pump of speed changer need be done more merit in order to supply with this extra pressure, and the oil pump difference in torque of oil pump moment of torsion and normal pressure multiply by the value of engine speed when the power loss that causes thus equaled to produce additional pressure, i.e. P
Loss=n
Engine* (T
Pump_surplusPressure-T
Pump_optimunPressure).From comparison diagram as can be seen, the control strategy of additional pressure will lose more power.
Above-mentioned design example only is used for that the present invention will be described, does not constitute the restriction to the claim scope, and other substantial equivalence means that it may occur to persons skilled in the art that are all in claim scope of the present invention.
Claims (2)
1. the controlling method of rubbing of the little cunning during wet clutch locking engagement is characterized in that: comprises the steps,
At first, read current throttle opening and engine speed;
The second, look into little cunning velocity diagram that rubs according to described throttle opening and described engine speed, drawing the optimum sliding speed of rubbing of target is MicroSlip Speed;
The 3rd, it is poor to calculate present engine and gearbox input shaft rotational speed, i.e. Δ N=(Ne-N1);
The 4th, calculate the current rotational speed N that needs adjusting, N=MicroSlip Speed-Δ N;
The 5th, regulate through suitable PID, speed discrepancy is converted to corresponding electric current changing value, i.e. the associated solenoid valve of the current solenoidoperated cluthes electric current Δ I that need regulate;
The 6th, the electric current Δ I that current clutch solenoid valve need be regulated adds existing effective current this moment, the optimal control current of solenoid valve when the little cunning of calculating clutch is rubbed the engagement locking.
2. the controlling method of rubbing of the little cunning during wet clutch locking according to claim 1 engagement, it is characterized in that: described little cunning velocity diagram that rubs need carry out theoretical calculation and a large amount of tests to the wet clutch that adopts, and draws the different solar terms door aperture graph of a relation of speed and engine speed of rubbing that glides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910047208A CN101614254A (en) | 2009-03-06 | 2009-03-06 | Little cunning in wet clutch locking when engagement controlling method of rubbing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910047208A CN101614254A (en) | 2009-03-06 | 2009-03-06 | Little cunning in wet clutch locking when engagement controlling method of rubbing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101614254A true CN101614254A (en) | 2009-12-30 |
Family
ID=41494083
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910047208A Pending CN101614254A (en) | 2009-03-06 | 2009-03-06 | Little cunning in wet clutch locking when engagement controlling method of rubbing |
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| CN (1) | CN101614254A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226468A (en) * | 2011-05-06 | 2011-10-26 | 三一重工股份有限公司 | Method, device and system for controlling engineering machinery gear shifting |
| CN102678908A (en) * | 2012-05-22 | 2012-09-19 | 湖南大学 | Self-adaption matching method for automatic transmission idling breakaway torque |
| WO2012149859A1 (en) * | 2011-05-04 | 2012-11-08 | 湖南三一智能控制设备有限公司 | Gear shifting control method, control device and grader having same |
| CN105408652A (en) * | 2013-08-01 | 2016-03-16 | 罗伯特·博世有限公司 | Method and device for coupling an internal combustion engine during deceleration |
| CN105822761A (en) * | 2016-04-26 | 2016-08-03 | 中国第汽车股份有限公司 | Dual-clutch friction coefficient self-learning method of wet-type dual-clutch automatic transmission |
| CN107741542A (en) * | 2017-10-13 | 2018-02-27 | 盛瑞传动股份有限公司 | The current stresses off-line learning method and test system of a kind of hydraulic automatic speed variator |
| CN110107617A (en) * | 2018-02-01 | 2019-08-09 | 舍弗勒技术股份两合公司 | Cunning excessively high in friction clutch in vehicle drive train is avoided to rub the method for revolving speed |
| CN110392793A (en) * | 2017-03-15 | 2019-10-29 | 沃尔沃卡车集团 | Method for disconnecting valve cell from the actuator devices of pneumatic control |
| CN111891106A (en) * | 2020-07-29 | 2020-11-06 | 中国第一汽车股份有限公司 | Power assembly control method for reducing torsional vibration of transmission system |
| CN112628395A (en) * | 2021-02-18 | 2021-04-09 | 雷沃工程机械集团有限公司 | Control strategy of proportional electromagnetic valve for loader planetary gearbox |
| DE102021130440A1 (en) | 2021-11-22 | 2023-05-25 | Audi Aktiengesellschaft | Method for operating a clutch of a motor vehicle |
-
2009
- 2009-03-06 CN CN200910047208A patent/CN101614254A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012149859A1 (en) * | 2011-05-04 | 2012-11-08 | 湖南三一智能控制设备有限公司 | Gear shifting control method, control device and grader having same |
| CN102226468A (en) * | 2011-05-06 | 2011-10-26 | 三一重工股份有限公司 | Method, device and system for controlling engineering machinery gear shifting |
| CN102226468B (en) * | 2011-05-06 | 2014-08-13 | 三一重工股份有限公司 | Method, device and system for controlling engineering machinery gear shifting |
| CN102678908A (en) * | 2012-05-22 | 2012-09-19 | 湖南大学 | Self-adaption matching method for automatic transmission idling breakaway torque |
| CN102678908B (en) * | 2012-05-22 | 2014-12-24 | 湖南大学 | Self-adaption matching method for automatic transmission idling breakaway torque |
| CN105408652B (en) * | 2013-08-01 | 2018-10-19 | 罗伯特·博世有限公司 | Method and apparatus for coupling internal combustion engine in deferring procedure |
| CN105408652A (en) * | 2013-08-01 | 2016-03-16 | 罗伯特·博世有限公司 | Method and device for coupling an internal combustion engine during deceleration |
| CN105822761A (en) * | 2016-04-26 | 2016-08-03 | 中国第汽车股份有限公司 | Dual-clutch friction coefficient self-learning method of wet-type dual-clutch automatic transmission |
| CN110392793A (en) * | 2017-03-15 | 2019-10-29 | 沃尔沃卡车集团 | Method for disconnecting valve cell from the actuator devices of pneumatic control |
| US10859129B2 (en) | 2017-03-15 | 2020-12-08 | Volvo Truck Corporation | Method for disconnecting a valve unit from a pneumatically controlled actuator arrangement |
| CN110392793B (en) * | 2017-03-15 | 2020-12-29 | 沃尔沃卡车集团 | Method for disconnecting a valve unit from a pneumatically controlled actuator device |
| CN107741542A (en) * | 2017-10-13 | 2018-02-27 | 盛瑞传动股份有限公司 | The current stresses off-line learning method and test system of a kind of hydraulic automatic speed variator |
| CN107741542B (en) * | 2017-10-13 | 2020-02-07 | 盛瑞传动股份有限公司 | Current pressure off-line learning method and test system of hydraulic automatic transmission |
| CN110107617B (en) * | 2018-02-01 | 2022-08-02 | 舍弗勒技术股份两合公司 | Method for avoiding excessive slip speeds in a friction clutch in a drive train of a vehicle |
| CN110107617A (en) * | 2018-02-01 | 2019-08-09 | 舍弗勒技术股份两合公司 | Cunning excessively high in friction clutch in vehicle drive train is avoided to rub the method for revolving speed |
| CN111891106A (en) * | 2020-07-29 | 2020-11-06 | 中国第一汽车股份有限公司 | Power assembly control method for reducing torsional vibration of transmission system |
| CN111891106B (en) * | 2020-07-29 | 2021-08-13 | 中国第一汽车股份有限公司 | Power assembly control method for reducing torsional vibration of transmission system |
| CN112628395A (en) * | 2021-02-18 | 2021-04-09 | 雷沃工程机械集团有限公司 | Control strategy of proportional electromagnetic valve for loader planetary gearbox |
| DE102021130440A1 (en) | 2021-11-22 | 2023-05-25 | Audi Aktiengesellschaft | Method for operating a clutch of a motor vehicle |
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Open date: 20091230 |