CN103277504A - Control method for gear selecting and shifting of automatic gearbox and vehicle applying control method - Google Patents
Control method for gear selecting and shifting of automatic gearbox and vehicle applying control method Download PDFInfo
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- CN103277504A CN103277504A CN2013102193502A CN201310219350A CN103277504A CN 103277504 A CN103277504 A CN 103277504A CN 2013102193502 A CN2013102193502 A CN 2013102193502A CN 201310219350 A CN201310219350 A CN 201310219350A CN 103277504 A CN103277504 A CN 103277504A
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Abstract
The invention discloses a control method for gear selecting and shifting of an automatic gearbox. The control method includes the following steps: adjusting speeds of an input shaft of the gearbox after gear removal, starting adjustment of working positions of a gear selecting cylinder on the condition that a rotating speed difference of the input shaft and an output shaft of the gearbox satisfies a range of threshold, and engaging a gear. Preferably, when the gear selecting cylinder is adjusted to be positioned in the middle, power sources at two ends of the gear selecting cylinder are kept connected; and gear shifting refers to that a gear shifting position is shifted to coincide with a side shifting-fork guide block along the direction of gear selecting, and the power sources at two ends of the gear selecting cylinder are disconnected. Preferably, before step 3, the rotating speed difference of the input shaft and the output shaft of the gearbox is controlled in real time to satisfy the range of the threshold. Compared with the prior art, the control method has the advantages that improved design of a control strategy is made, so that overall control cost can be greatly reduced, and service lives of function components can be prolonged effectively. On the basis, the invention further provides a vehicle applying the control method for gear selecting and shifting.
Description
Technical field
The present invention relates to vehicle power control technique field, be specifically related to the vehicle that a kind of automatic transmission case is selected gear-shifting control method and used this method.
Background technique
AMT(electrical control automatic manual transmission case, Automated Mechanical Transmission) be to improve on traditional manual gear formula speed changer basis, it has kept most former assembly parts, only incite somebody to action the wherein shift level part of manual operation system, change the actuator of electrical control into, the production inheritance is good, and the input expense of transformation is few.The actuator of AMT is distinguished according to power source electrically controlled and hydraulically, ecp and three kinds of structures of electricity powered, adopt oil hydraulic cylinder, cylinder and motor as power source respectively, gear change need be passed through gear selecting and two motion combination of gear shift, the gear selecting action is used for referring to the gear that 5 selections are about to promote by gear shift, gear shift action is used for referring to 5 and corresponding shift fork guide block 6 by gear shift, the gear that promotes to select meshes (engage a gear) or separates (plucking retaining), to change velocity ratio.See also Fig. 1, the figure shows the gear shift diagram that selects of existing automatic transmission case.
As everyone knows, gearbox is delivered to output shaft with power by input shaft by the gear of input shaft drive and the gear engagement of output shaft drive, changes the gear of input shaft, just can change velocity ratio.In the automobile normal running process, input shaft and output shaft are all rotating, and the gear rotational speed that both drive must unanimity just can carry out the gear shift engagement, otherwise both speed discrepancies will form huge impact, very easily damage gear or other transmission part, and then influence the travelling comfort of vehicle.Yet for the AMT that does not have synchronizer, car speed is that the output shaft rotating speed is constant substantially, in order to realize smooth shifting, generally after changing input shaft gear, adopt speed-adjustable motor to drive the mode that input shaft carries out speed governing, make two gear rotational speed unanimities again.Therefore, AMT blocks in the action of carrying out between putting into gear plucking, and comprises gear selecting and two processes of gearbox input shaft speed governing, that is to say, just can carry out last engage a gear action after the both finishes.
In order to reduce the power interruption time that gearshift procedure causes, guarantee smoothness, travelling comfort in the vehicle traveling process, need reduce shift time as much as possible, automatic transmission case selects the main control strategies of gear shift to be in the prior art: gear selecting, two processes of gearbox input shaft speed governing are carried out simultaneously.Particularly, gearbox pluck the retaining finish after, the transmission of power between gearbox input shaft and the output shaft is cut off, this moment can use the driven by motor input shaft to carry out speed governing; Meanwhile, gear selecting operation just to will in conjunction with the preliminary election of gear, the mechanical connection to gearbox does not exert an influence, so speed governing and gear selecting can carry out simultaneously, this pool strategy can be saved shift time.Below carry out brief description with electropneumatic six gears control, please in the lump referring to Fig. 2, the figure shows the structural representation of its gear-selecting and shifting executing mechanism, embodied gear selecting cylinder 1, gear selecting position transducer 2, gear shifting cylinder 3, shift pattern sensor 4 and gear shift among the figure and referred to relative position relation between 5.
Wherein, gear selecting operation is by the gear selecting cylinder gear shift to be referred to be pushed to the position of preliminary election, almost without any resistance, adds that pneumatic structure itself has the fast characteristics of response in this process, so compole is short during gear selecting, has only a few tens of milliseconds.And motor speed-regulating is subjected to the influence of rotary inertia of response time, motor shaft and the gearbox input shaft of motor self, and governing time is substantially at 1～2 second, so gear selecting needs to wait for that speed regulation process finishes after finishing, and just can carry out next step engage a gear operation.But, for existing three position cylinder that satisfy six gear change, piston to be promoted in the neutral position, must ventilate simultaneously at the cylinder two ends, behind the piston arrives neutral position, if remove source of the gas immediately, very likely because cylinder two ends release speed difference causes the move left and right of piston, cause the dangerous situation of gear selecting change in location even missed shift.There are two kinds of methods to address this problem at present.First method is the release speed at accurate control cylinder two ends, and this needs hardware such as solenoid valve to have high control accuracy, and will significantly improve design and the machining accuracy of cylinder, and cost raises.Second method is the lasting connection that keeps source of the gas, and piston is stabilized in the neutral position; Because the control mode that speed governing and gear selecting are carried out simultaneously, the gear selecting actual act time has only a few tens of milliseconds, but needs to continue 1～2 second time of ventilation to keep the neutral position, and lasting ventilation directly has influence on the working life of Sealing and solenoid valve.
In view of this, demand urgently looking for another way and select gear shift control to improve design at automatic transmission case, effectively to overcome the above-mentioned defective that prior art exists.
Summary of the invention
At above-mentioned defective, the technical problem that the present invention solves is to provide a kind of automatic transmission case to select gear-shifting control method, controls cost by improving to design to reduce totally greatly, and the while is the working life of enhanced feature parts effectively.On this basis, the present invention also provide a kind of application this select the vehicle of gear-shifting control method.
Automatic transmission case provided by the invention is selected gear-shifting control method, carries out according to following steps in sequence:
S1. pluck the speed governing of carrying out the gearbox input shaft after shelves are finished;
S2. satisfying threshold range with the speed discrepancy of the input shaft of described gearbox and output shaft is condition, starts the adjustment of gear selecting cylinder working position;
S3. engage a gear.
Preferably, among the step S1, adopt speed-adjustable motor to carry out the speed adjustment of described gearbox input shaft.
Preferably, among the step S2, adopt first speed probe to obtain the rotating speed of described speed-adjustable motor or obtain described gearbox input shaft rotational speed, as the input shaft rotating speed of described gearbox; Adopt second speed probe to obtain the output shaft rotating speed of described gearbox.
Preferably, when adjusting described gear selecting cylinder and being positioned at the neutral position, the two ends power source of described gear selecting cylinder keeps connecting; Gear shift refers to that gear shift is moved to side shift fork guide block and overlaps along the gear selecting direction that the two ends power source of described gear selecting cylinder disconnects.
Preferably, before the step S3, control the input shaft of described gearbox and the speed discrepancy of output shaft in real time and satisfy threshold range.
Preferably, described gear selecting cylinder adopts pneumatic linear actuator or liquid cylinder.
Vehicle provided by the invention, the driving power system of this vehicle comprises automatic transmission case, the gear selecting of described automatic transmission case and gear shift adopt foregoing automatic transmission case to select gear-shifting control method.
The automatic transmission case that this programme provides selects shift control strategy to carry out improving design, particularly, plucks the speed governing of at first carrying out the gearbox input shaft after shelves are finished; And to satisfy threshold range with the speed discrepancy of the input shaft of gearbox and output shaft be condition, starts the adjustment of gear selecting cylinder working position; Next, carry out engage a gear after gear selecting is finished.So arrange, because gear selecting carries out after speed governing is finished, and gear selecting can carry out the engage a gear operation after putting in place, and blanking time is shorter, has only a few tens of milliseconds; Even if two ends continued to be communicated with power source when the gear selecting cylinder was positioned at the neutral position, the short endurance can avoid solenoid valve, cylinder seal spare to work long hours and shorten the life-span.Simultaneously, need not the release speed at accurate control cylinder two ends, and adopt the hardware such as solenoid valve with high control accuracy, further effectively controlled whole cost.Compared with prior art, can effectively avoid the ANOMALOUS VARIATIONS of gear selecting position, take into account the stability in gear selecting cylinder neutral position; And on this basis, can further control totally and control cost, the while is the working life of enhanced feature parts effectively.
In preferred version of the present invention, when adjustment gear selecting cylinder was positioned at the neutral position, the two ends power source of gear selecting cylinder kept connecting, and namely guarantees to be in the stable operation position before the engage a gear; And referring to gear shift, gear shift is moved to when overlapping along the gear selecting direction with side shift fork guide block, the two ends power source of gear selecting cylinder disconnects, at this moment, when even if engage a gear is not to desirable position, be subjected to the restriction of both sides shift fork guide block, gear shift refers to can ANOMALOUS VARIATIONS not occur under the drive of gear selecting cylinder, thereby the two ends power source that has limited the gear selecting cylinder is to greatest extent supplied with.
In another preferred version of the present invention, control the input shaft of gearbox and the speed discrepancy of output shaft before the engage a gear operation in real time and satisfy threshold range, that is to say, in the gear selecting process, keep the speed governing state, the input shaft and the output shaft that prevent gearbox reappear speed discrepancy and cause the engage a gear failure, have further improved system works stability.
Description of drawings
Fig. 1 shows the gear shift diagram that selects of existing automatic transmission case;
Fig. 2 is the gear-selecting and shifting executing mechanism schematic representation of electropneumatic six gears of a kind of typical case in the prior art;
Fig. 3 illustrates the FB(flow block) that the described automatic transmission case of embodiment is selected gear-shifting control method;
Fig. 4, Fig. 5 and Fig. 6 have obtained the different operating position of three position gear selecting cylinders respectively;
Fig. 7 show automatic transmission case described in the embodiment 3 grades of engage a gear schematic representation.
Embodiment
Core of the present invention provides a kind of automatic transmission case and selects gear-shifting control method, to take into account on the basis of working stability, reduces and totally controls cost, and the while is the working life of enhanced feature parts effectively.Specify present embodiment below in conjunction with Figure of description.
See also Fig. 3, this illustrates the FB(flow block) that the described automatic transmission case of present embodiment is selected gear-shifting control method.
This method is carried out according to following successively:
S1. pluck the speed governing of carrying out the gearbox input shaft after shelves are finished; After obtaining the gear change instruction, pluck shelves, next carry out the speed governing of gearbox input shaft.Wherein, the preferred speed-adjustable motor that is arranged between clutch and the gearbox that adopts carries out the speed adjustment of gearbox input shaft.
S2. satisfying threshold range with the speed discrepancy of the input shaft of described gearbox and output shaft is condition, starts the adjustment of gear selecting cylinder working position; Here, described " threshold range " can be set according to different type of machines and actual applying working condition, so that improve adaptability in the control procedure.Should be appreciated that there is difference in " threshold range " that different type of machines sets, as long as the speed discrepancy of the input shaft of gearbox and output shaft does not constitute the damage engaging gear or other transmission paries all can.
S3. engage a gear.Plucking the back time to engage a gear of retaining is governing time, the summation of block selecting time.
In the working procedure, the rotating speed of the information calculations that controller obtains according to speed probe and the gearbox transfer input shaft speed sensors of electric system, with this interpretation speed governing state, when both speed discrepancies satisfy the scope of setting, speed governing is finished, and simultaneously controller can be judged the gear selecting position according to the position transducer of gear selecting cylinder, after speed governing and gear selecting are all finished, stop speed governing, and carry out the engage a gear operation immediately.Obviously, because gear selecting carries out after speed governing is finished, and gear selecting can carry out the engage a gear operation after putting in place, has only a few tens of milliseconds blanking time; Therefore, even if two ends continue to be communicated with power source when the gear selecting cylinder is positioned at the neutral position, can avoid solenoid valve, cylinder seal spare to work long hours and shorten the life-span than the endurance of lacking.Simultaneously, need not the release speed at accurate control cylinder two ends, and adopt the hardware such as solenoid valve with high control accuracy.
Wherein, the input shaft rotating speed of gearbox determines among the step S2, can adopt first speed probe directly to obtain the gearbox input shaft rotational speed, and with this, compare judgement with the output shaft rotating speed that adopts second speed probe to obtain gearbox, both differences and speed discrepancy threshold range are done further to judge.Yet this mode need be offered corresponding mounting hole at gear box casing, and specific implementation is comparatively loaded down with trivial details.In fact, the definite of the input shaft rotating speed of gearbox also can design like this, because it is minimum to the mechanical loss between the gearbox input shaft to adjust motor, can ignore, therefore, adopt first speed probe to obtain the rotating speed of speed-adjustable motor, and compare judgement with this as the input shaft rotating speed of gearbox and the output shaft rotating speed of gearbox, can satisfy the required precision of speed regulation process equally.
In order to ensure the smooth and easy engagement of gear switch process middle gear, further the elevator system working stability before the step S3, is controlled the input shaft of described gearbox and the speed discrepancy of output shaft in real time and is satisfied threshold range.That is to say, in the gear selecting process, keep the speed governing state, prevent that the input shaft of gearbox and output shaft from reappearing speed discrepancy and causing the engage a gear failure.
Below in its working procedure of cylinder schematic diagram brief description with electropneumatic six gears control.Adopt three position cylinder can satisfy six gear change requirements.
As shown in Figure 4, this cylinder is positioned at primary importance, and the air inlet of diagram right-side cavity promotes piston to leftward position.As shown in Figure 5, this cylinder is positioned at the second place, illustrates two chamber air inlets, promotes piston to the neutral position.As shown in Figure 6, these cylinders are in the 3rd position, and diagram left side chamber air inlet promotes piston to right positions.Thus, two form six gears altogether to switching in conjunction with what gear shift referred to.
Wherein, when adjustment gear selecting cylinder was positioned at the neutral position, the two ends power source of gear selecting cylinder kept connecting; Gear shift refers to that gear shift is moved to side shift fork guide block and overlaps along the gear selecting direction that the two ends power source of gear selecting cylinder disconnects.Specifically as shown in Figure 7, this shows 3 grades of engage a gear schematic representation.Even if when engage a gear is not to desirable position as shown in the figure, be subjected to the restriction of both sides shift fork guide block, gear shift refers to can ANOMALOUS VARIATIONS not occur under the drive of gear selecting cylinder, thereby the two ends power source that has limited the gear selecting cylinder is to greatest extent supplied with.
What specify is, present embodiment is that example has been carried out exemplary explanation with the pneumatic linear actuator, and in fact, this gear selecting cylinder can also adopt liquid cylinder, is adapted to the gear-shifting control method that selects that this programme provides equally.
Except aforementioned automatic transmission case is selected gear-shifting control method, present embodiment also provides a kind of vehicle, the driving power system of this vehicle comprises by engine-driven automatic transmission case, and the gear selecting of this automatic transmission case and gear shift adopt foregoing automatic transmission case to select gear-shifting control method.Need clearly, other functional parts of this vehicle all can adopt existing techniques in realizing, so this paper repeats no more.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. an automatic transmission case is selected gear-shifting control method, it is characterized in that, this controlling method is carried out according to following steps in sequence:
S1. pluck the speed governing of carrying out the gearbox input shaft after shelves are finished;
S2. satisfying threshold range with the speed discrepancy of the input shaft of described gearbox and output shaft is condition, starts the adjustment of gear selecting cylinder working position;
S3. engage a gear.
2. automatic transmission case according to claim 1 is selected gear-shifting control method, it is characterized in that, among the step S1, adopts speed-adjustable motor to carry out the speed adjustment of described gearbox input shaft.
3. automatic transmission case according to claim 2 is selected gear-shifting control method, it is characterized in that, among the step S2, adopt first speed probe to obtain the rotating speed of described speed-adjustable motor or obtain described gearbox input shaft rotational speed, as the input shaft rotating speed of described gearbox; Adopt second speed probe to obtain the output shaft rotating speed of described gearbox.
4. select gear-shifting control method according to each described automatic transmission case in the claim 1 to 3, it is characterized in that, when adjusting described gear selecting cylinder and being positioned at the neutral position, the two ends power source of described gear selecting cylinder keeps connecting; Gear shift refers to that gear shift is moved to side shift fork guide block and overlaps along the gear selecting direction that the two ends power source of described gear selecting cylinder disconnects.
5. automatic transmission case according to claim 4 is selected gear-shifting control method, it is characterized in that, before the step S3, controls the input shaft of described gearbox and the speed discrepancy of output shaft in real time and satisfies threshold range.
6. automatic transmission case according to claim 1 is selected gear-shifting control method, it is characterized in that, described gear selecting cylinder adopts pneumatic linear actuator or liquid cylinder.
7. vehicle, the driving power system of this vehicle comprises by engine-driven automatic transmission case, it is characterized in that, the gear selecting of described automatic transmission case and gear shift are adopted and are selected gear-shifting control method as each described automatic transmission case in the claim 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102193502A CN103277504A (en) | 2013-06-04 | 2013-06-04 | Control method for gear selecting and shifting of automatic gearbox and vehicle applying control method |
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| CN2013102193502A CN103277504A (en) | 2013-06-04 | 2013-06-04 | Control method for gear selecting and shifting of automatic gearbox and vehicle applying control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103836174A (en) * | 2013-12-11 | 2014-06-04 | 潍柴动力股份有限公司 | Automatic transmission and gear selection and shift actuating mechanism thereof |
| CN107344549A (en) * | 2017-05-24 | 2017-11-14 | 广州汽车集团股份有限公司 | manual gear vehicle shift control method, device and control system |
| CN107642598A (en) * | 2016-07-20 | 2018-01-30 | 丰田自动车株式会社 | Controller for automatic transmission |
| CN111255888A (en) * | 2018-11-30 | 2020-06-09 | 北汽福田汽车股份有限公司 | Transmission, transmission method and vehicle |
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| CN102840309A (en) * | 2012-09-18 | 2012-12-26 | 清华大学 | Synchronizer-free shifting system for regulating speed of intermediate shaft of electric automobile |
| CN102979862A (en) * | 2012-11-23 | 2013-03-20 | 武汉理工通宇新源动力有限公司 | Two speed automatic transmission |
| CN103010214A (en) * | 2012-12-14 | 2013-04-03 | 清华大学 | Method for controlling parallel hybrid electric vehicle gear shifting |
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| EP1122111B1 (en) * | 2000-02-04 | 2005-07-06 | Hitachi, Ltd. | A power transmission apparatus for hybrid vehicles |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836174A (en) * | 2013-12-11 | 2014-06-04 | 潍柴动力股份有限公司 | Automatic transmission and gear selection and shift actuating mechanism thereof |
| CN107642598A (en) * | 2016-07-20 | 2018-01-30 | 丰田自动车株式会社 | Controller for automatic transmission |
| CN107642598B (en) * | 2016-07-20 | 2019-09-20 | 丰田自动车株式会社 | Controller for automatic transmission |
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| CN111255888A (en) * | 2018-11-30 | 2020-06-09 | 北汽福田汽车股份有限公司 | Transmission, transmission method and vehicle |
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Application publication date: 20130904 |