CN1517244A

CN1517244A - Control logic for manual-automatic gear-shifting box

Info

Publication number: CN1517244A
Application number: CNA031003125A
Authority: CN
Inventors: 刘庆文
Original assignee: Industrial Technology Research Institute ITRI
Current assignee: Industrial Technology Research Institute ITRI
Priority date: 2003-01-13
Filing date: 2003-01-13
Publication date: 2004-08-04
Anticipated expiration: 2023-01-13
Also published as: CN100506621C

Abstract

A control logic for manual gear-shifting box includes shifting control of gear-shifting box, engine control and clutch control. For said shifting control of gear-shifting box, the originally engaged gears are separated at the first stage and the speed is quickly reduced while the target gear is engaged at the second stage. For said engine control, the shiaft time of synchronizer control mode and clutch mode are respectively calculated and the synchronizer control mode or clutch mode is determined according to calculated result. If it is clutch control, the rotation speed of engine is also controlled. Its advantages are short shift time, low shift vibration, and long service life of clutch disk.

Description

Hand is from arranging the change speed gear box control logic

Technical field

The present invention relates to a kind of hand from the gear shift and the clutch control logic of arranging change speed gear box, reduce shift time to reach, reduce the gear shift vibrations and the effect in increase clutch segment life-span.

Background technology

Horsepower output with change speed gear box, hand row formula change speed gear box can perform to the power of engine about 94% high benefit, only because of need in the manually operated mode and cooperate the pin stepping on clutch to operate, to driver's higher and troublesome poeration of difficulty not only, though and the self arrangement change speed gear box is easy and simple to handle, but because of only the power of engine being performed to 80% benefit, therefore, than loss power, and hand is from the mode of arranging the i.e. row's of the picking up from operation of change speed gear box, see through the transmission of signal, handle the action of hand row change speed gear box with gear actuator (motor), so can take into account the advantage of the high driving efficiency of self arrangement easy operating and hand row's formula, make the performance of automobile obtain the actv. lifting, this hand mainly comprises the control of change speed gear box gear from arranging change speed gear box control, control of gear shift engine and clutch control three are partly formed; Wherein the change speed gear box gear is controlled to be the switching of control change speed gear box speed ratio, in action, need to break away from earlier original interlock gear mesh, the interlock of controlled target gear mesh and the speed ratio of finishing change speed gear box switches again, and the gear performance of the mainly necessary collocation hand of the speed that speed ratio switches row change speed gear box, too fast gear action will cause the damage of Synchromous device of gearbox, as Fig. 1 is the gear position signal, its gear process comprised for three stages, F/s is for breaking away from original interlock gear mesh, subordinate phase is the interlock process of target gear mesh, final stage is the complete interlock of target gear mesh, wherein F/s is the same with the switching speed of final stage, and subordinate phase is the interlock process of target gear mesh, because of the interlock process needs bigger gear shift strength, and reduced gear speed, and the gear motor signal of its gear control is as shown in Figure 2, its mode is controlled the start of gear mechanism with certain motor aperture; Aspect the control of gear shift engine, by Fig. 3 is the gear shift engine control logic that US 6319171 is proposed, its mode mainly is to utilize the Control Engine rotating speed to make that the speed of synchro both sides is the same, when the velocity contrast of confirming the synchro both sides less than a default value, then carry out the synchro snap-action, at last aspect clutch control, US 5275267 clutch controies, Fig. 4-1 is a power-transfer clutch and the relevant pass characteristic curve of control position, Fig. 4-2 and Fig. 4-3 are its clutch control pattern, wherein Fig. 4-2 is the master mode of general power-transfer clutch, and Fig. 4-3 is the master mode of throttle gate for low aperture, in Fig. 4-3 master mode that is provided, mainly be to make engine speed and change speed gear box input speed keep a speed discrepancy by control clutch.

By above-mentioned prior art, in gear control, arrange the gear performance of change speed gear box because of considering hand, it is with under certain motor aperture, keeping each stage gear process carries out under certain speed, can't reduce the gear time, and US6319171 proposes gear shift engine control logic, utilize the Control Engine rotating speed to make that the speed of synchro both sides is the same, and the ride comfort of wishing the increase gear shift, but so when the synchro interlock, tractive force will be arranged, improper or load variations is excessive as engine speed control in the interlock process, then will cause gear failure or synchro to damage, and utilize the Control Engine rotating speed to make the speed of synchro both sides less than a default value, shift time will be prolonged, as shown in Fig. 1, power-transfer clutch still needs considerable time interlock fully after finishing gear, so will cause the abrasion and long shift time (shift time is that gear begins to the complete interlock of power-transfer clutch) of power-transfer clutch, last in the control of power-transfer clutch, the mode of Fig. 4 among the US 5275267-3, only use rotating speed as the control foundation, also may cause the improper abrasion of power-transfer clutch.

Summary of the invention

Main purpose of the present invention provides a kind of change speed gear box control logic, and it includes the control of change speed gear box gear, the control of gear shift engine and clutch control three partly; Wherein the control of change speed gear box gear partly is in the gear process, in the stage that breaks away from original interlock gear mesh, arrive the most at a high speed with fast speed mode, and when default position or time, be decelerated to synchro interlock speed more fast, and reduce the time of gear shift; The control of gear shift engine partly includes synchro master mode and clutch control pattern, it is to utilize change speed gear box to export to calculate the synchro of pre-start and change speed gear box into rotating speed and target gear to export speed ratio into rotating speed, export into rotating speed according to engine speed and synchro both sides rotating speed and change speed gear box again, calculate the shift time of estimating under synchro master mode and the clutch mode respectively, again by result of calculation, be judged as synchro master mode or clutch control pattern with the time, as two-mode time person less than a default value, then based on the synchro master mode, wherein, the synchro master mode is to utilize the Control Engine rotating speed to make that the speed of synchro both sides is the same, the clutch control pattern then utilizes the Control Engine rotating speed to make that the speed of power-transfer clutch both sides is the same, and the velocity contrast of power-transfer clutch both sides is more little, then the speed of control clutch interlock is faster, and reduce the clutch seizure period, and reduce the gear shift vibrations in the clutch seizure process, the abrasion that also can lower power-transfer clutch; Clutch control partly can be divided into gear shift master mode, low speed master mode and general master mode, the gear shift master mode is the engine speed control of arranging in pairs or groups as previously mentioned, so that the interlock of power-transfer clutch is quicker and simultaneously the Control Engine rotating speed to target vehicle speed, the low speed master mode is mainly the clutch control pattern that starting is slided, it utilizes the estimate curve of clutch position to snap-in force, Control Engine output one default torsion is so that car can keep low speed to slide.

The present invention is described in detail with instantiation below in conjunction with accompanying drawing.

Description of drawings

The 1st figure is that hand is from arranging shift characteristic figure;

The 2nd figure is the gear motor signal figure of gear control;

The 3rd figure is the diagram of circuit of U.S. Pat 6319171 gear shift engines control;

Fig. 4-the 1st, the correlation properties diagram of curves of U.S. Pat 5275267 power-transfer clutchs and control position;

Fig. 4-the 2nd, U.S. Pat 5275267 general clutch control patterns;

Fig. 4-the 3rd, U.S. Pat 5275267 throttle gates are the master mode of low aperture;

Fig. 5 is the diagram of curves of change speed gear box gear control of the present invention;

Fig. 6 is the scheme drawing of transmission of the present invention;

Fig. 7 is the diagram of circuit of gear shift engine control of the present invention;

Fig. 8 is the diagram of circuit of clutch control of the present invention;

Fig. 9 is the diagram of circuit of clutch position control of the present invention.

The specific embodiment

Hand of the present invention consists predominantly of the control of change speed gear box gear, control of gear shift engine and clutch control three parts from arranging the change speed gear box control logic; In the control of change speed gear box gear partly, as Fig. 1 gear position signal, its gear process comprised for three stages, F/s is for breaking away from original interlock gear mesh, subordinate phase is the interlock process of target gear mesh, final stage is the complete interlock of target gear mesh, wherein, subordinate phase and final stage are because of carrying out the interlock of target gear mesh, do not make synchro impaired in order to consider, so its switching speed can not be too fast, therefore can't change the aperture of gear shift motor, and remain under certain speed, but F/s is for breaking away from former interlock gear mesh, it can not need consider the factor of synchro, and can increase the aperture of gear motor, carry out with gear speed faster, therefore on gear, as Fig. 5, after F/s begins, get final product the aperture of standard-sized sheet gear motor, arrive the most at a high speed to make gear speed as early as possible, up to X1 point position, slow down fast again, and the speed during to X2 point position, the hand of then arranging in pairs or groups is arranged the gear performance of change speed gear box, carry out gear with proper speed, can effectively reduce the time of gear and when carrying out subordinate phase, also can guarantee that synchro is not impaired at F/s, in addition in the process of gear, adaptation correction is carried out in the X1 point position then speed with to X2 point position time the and the difference of pre-set velocity, and, calculate the average current in the gear process in addition, and the time of utilizing X1 point position and arrival X1 to order as the foundation of gear next time, judge whether switching speed is weak, is used as the basis for estimation whether gear motor (actuator) need be changed.

In the control of gear shift engine partly, include synchro master mode and clutch control pattern at this, as shown in Figure 6, the rotating speed of power-transfer clutch one side is n3 (this is the rotating speed of engine), the rotating speed of opposite side is n4 (this is the change speed gear box input speed), establish gear mesh t1 in the change speed gear box, t2 and another gear mesh t3, t4, see through the selection interlock of synchro, and can obtain the rotation speed n 1 (this is the tooth engaged wheel speed) of synchro one side and the rotation speed n 2 (this is the change speed gear box output speed) of opposite side respectively, rotating speed according to engine is n3, and the change speed gear box output speed that can calculate original state is n3* (t3/t4)=n2, for making synchro when the gear shift interlock, the rotating speed convergence unanimity of its both sides, in order to the synchro interlock, and can be by n1=n2, n1* (t2/t1)=n3 (engine rotating speed of target), and acquisition engine rotating speed of target, again according to engine speed n3 and synchro both sides rotation speed n 1, n2 and change speed gear box are exported into rotation speed n 4 and n2, calculate the estimated time of synchro master mode and clutch control pattern respectively, simultaneously by result of calculation, be judged as synchro pattern or clutch control pattern with the time then, if the absolute value of two-mode time value difference is less than a default value, then based on the synchro master mode; The synchro master mode, as Fig. 6, shown in 7, mainly be to utilize Control Engine rotation speed n 3 to make synchro both sides n1, the speed of n2 is the same, but in control, need collocation power-transfer clutch restriction tractive force limit, when it begins when gear, power-transfer clutch can break away from (off), be beneficial to the disengaging (off) of original synchro, in the control mainly after former synchro breaks away from, by the position Ys=f (Ts) of clutch position to tractive force curve calculation clutch shift tractive force limit, and control clutch is to Ys+b, wherein b is a default value, simultaneously according to the present revolution speed calculating engine of change speed gear box rotating speed of target, promptly with under the n1=n2, by n1* (t2/t1) computing engines rotating speed of target, and the Control Engine rotating speed is to rotating speed of target, when gear arrives the X1 point of Fig. 5, synchro preparation interlock this moment, judge that whether the absolute value of synchro both sides speed discrepancy n1-n2 is less than a default value this moment, as less than default value, then control clutch is to Ys (on) position, make n3=n4, otherwise control clutch is to disengaging configuration Y0-a (power-transfer clutch off), with synchro interlock (on), after gear is finished, then again power-transfer clutch is begun again gradually to interlock fully, as power-transfer clutch two ends n3, the velocity contrast of n4 is more little, and then the speed of control clutch interlock is faster; The clutch control pattern, as Fig. 6, shown in 7, mainly be to utilize the Control Engine rotating speed, make the speed of power-transfer clutch both sides the same (n3=n4), when the beginning gear shift, power-transfer clutch is to disengaging configuration Y0-a, under n1=n2, by n1* (t2/t1) computing engines rotating speed of target, when engine speed is lower than the engine rotating speed of target, then the Control Engine rotating speed is followed the change speed gear box input speed, to reduce engine speed and the change speed gear box input shaft rotational speed is poor, promptly reduce the absolute value of n3-n4, after gear is finished, promptly behind the synchro on, begin to carry out clutch seizure control, so then can reduce the clutch seizure period, and the gear shift vibrations in the minimizing clutch seizure process, the abrasion that also can lower power-transfer clutch are higher than the change speed gear box input speed as engine speed, then keep idling, after gear was finished, then power-transfer clutch began gradually interlock extremely fully, and the velocity contrast at power-transfer clutch two ends is littler, then the speed of control clutch interlock is faster, and while Control Engine rotating speed is to target vehicle speed.

At last partly at clutch control, flow process such as Fig. 8, shown in 9, can be divided into the gear shift master mode, low speed master mode and general master mode, aspect the gear shift master mode, as above-mentioned collocation engine speed control, in control process, utilize simultaneously the relation between engine speed and change speed gear box input speed, judge that power-transfer clutch begins occlusal position and power-transfer clutch does not have skid position and engine load and the record of this moment, after finishing, gear shift utilize this record to revise the estimate curve of clutch position to snap-in force, judge according to estimating curve whether clutch state is normal then, last low speed master mode is mainly the clutch control pattern that starting is slided, this moment, the acceleration pedal aperture was low and the speed of a motor vehicle is lower, then utilize the estimate curve of clutch position on the clutch control to snap-in force, Control Engine outputting torsion=default torsion * (1+m* throttle opening), the friction that can resist garage with the Control Engine outputting torsion, and engine is flame-out, makes car can keep low speed to slide.

Claims

1, a kind of hand includes the control of change speed gear box gear from arranging the change speed gear box control logic, and control of gear shift engine and clutch control three are partly; Wherein,

The control of change speed gear box gear: in the gear process, in the stage that breaks away from original interlock gear mesh, at high speed arrives gear speed the most at a high speed, and is decelerated to synchro interlock speed fast in default position or time;

The control of gear shift engine: it includes synchro master mode and clutch control pattern, the synchro master mode is to utilize the Control Engine rotating speed, make that the speed of synchro both sides is the same, to reduce the speed discrepancy of target gear mesh rotating speed and change speed gear box output speed, the clutch control pattern is to utilize the Control Engine rotating speed, make that the speed of power-transfer clutch both sides is the same, to reduce the speed discrepancy of engine speed and change speed gear box input speed;

Clutch control: it includes gear shift master mode, low speed master mode and general master mode, the gear shift master mode is when the beginning gear shift, power-transfer clutch is to disengaging configuration, and collocation engine speed control, make that power-transfer clutch both sides velocity contrast is the same, the low speed master mode provides the low speed sliding mode, its Control Engine outputting torsion=default torsion * (1+m* throttle opening).

2, hand as claimed in claim 1 is from arranging the change speed gear box control logic, wherein, the control of this change speed gear box gear is fast gear speed to be arrived high speed X1 point position, and be decelerated to X2 point position fast in default position or time, this X1 point position is that the speed with to X2 point position time the and the difference of pre-set velocity are carried out adaptation correction, and as the foundation of gear next time.

3, hand as claimed in claim 2 is from arranging the change speed gear box control logic, and wherein, this change speed gear box gear control can utilize X1 point position and arrive the time that X1 is ordered, and whether needs the basis for estimation of changing as the gear actuator.

4, hand as claimed in claim 1 is from arranging the change speed gear box control logic, wherein, the control of this gear shift engine is to utilize change speed gear box to export to calculate the synchro of desiring start and change speed gear box into rotating speed and target gear to export speed ratio into rotating speed, export into rotating speed according to engine speed and synchro both sides rotating speed and change speed gear box again, calculate the shift time of estimating under synchro master mode and the clutch mode respectively, be judged as synchro master mode or clutch control pattern by result of calculation simultaneously.

5, hand as claimed in claim 4 is from arranging the change speed gear box control logic, wherein, this synchro master mode and clutch control pattern estimate shift time, estimate the shift time value less than a preset value, then based on the synchro master mode as if two-mode.

6, hand as claimed in claim 1 is from arranging the change speed gear box control logic, wherein, the synchro master mode of this gear shift engine control, it is according to the present rotating speed of change speed gear box, computing engines rotating speed of target, and the Control Engine rotating speed is to rotating speed of target and make power-transfer clutch ON, when synchro preparation interlock, judge the speed discrepancy of synchro both sides, whether less than setting value, if less than setting value, then carry out the interlock of synchro.

7, hand as claimed in claim 6 is from arranging the change speed gear box control logic, wherein, if the speed discrepancy of these synchro both sides during greater than setting value, then makes power-transfer clutch to disengaging configuration, after the synchro interlock, power-transfer clutch begun gradually to interlock again.

8, hand as claimed in claim 1 is from arranging the change speed gear box control logic, wherein, the clutch control pattern of this gear shift engine control, be according to engine speed and change speed gear box input speed, judge the engine rotating speed of target, and the Control Engine rotating speed follows the change speed gear box input speed, after the synchro interlock, begin to carry out the interlock control of power-transfer clutch again, to reduce the speed discrepancy of power-transfer clutch both sides.

9, hand as claimed in claim 8 is from arranging the change speed gear box control logic, wherein, if this engine speed is lower than the engine rotating speed of target, then make engine quicken to follow the change speed gear box input speed, reduce the speed discrepancy of power-transfer clutch both sides, if this engine speed is higher than the engine rotating speed of target, then makes engine lower rotating speed and remain on idling, to reduce the speed discrepancy of power-transfer clutch both sides.

10, hand as claimed in claim 1 is from arranging the change speed gear box control logic, wherein, the gear shift master mode of this clutch control, it can be in control process, utilize the relation between engine speed and change speed gear box input speed, judge that power-transfer clutch begins occlusal position and power-transfer clutch does not have the position of skidding and engine load, revise the estimate curve of clutch position, and estimate curve according to this and judge whether clutch state is normal snap-in force.

11, hand as claimed in claim 1 is from arranging the change speed gear box control logic, wherein, the low speed master mode of this clutch control, be to utilize the estimate curve of clutch position on its clutch control to snap-in force, Control Engine outputting torsion=default torsion * (1+m* throttle opening) is so that car keeps low speed to slide.