CN102717863A - Electric vehicle speed changer and speed change control method - Google Patents
Electric vehicle speed changer and speed change control method Download PDFInfo
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- CN102717863A CN102717863A CN2012102063650A CN201210206365A CN102717863A CN 102717863 A CN102717863 A CN 102717863A CN 2012102063650 A CN2012102063650 A CN 2012102063650A CN 201210206365 A CN201210206365 A CN 201210206365A CN 102717863 A CN102717863 A CN 102717863A
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Abstract
The invention discloses an electric vehicle speed changer and a speed change control method. The electric vehicle speed changer comprises a transmission gear box and a gear shifting controller, wherein a gear shifting motor is also arranged in the transmission gear box; the gear shifting motor drives a gear shifting gear set to be meshed with a first gear reduction gear set or a second gear reduction gear set through a screw rod in an infinite manner; and the gear shifting controller comprises a gear shifting instruction receiving unit, an input speed detecting unit, a gear shifting motor control unit, an input speed control unit and a center calculating unit. The speed change control method comprises the steps as follows: the target speed is calculated; the torque output of a driving motor is closed; and the gears are changed. The electric vehicle speed changer and the speed change control method can achieve the intelligent switching between the first gear and the second gear; in addition, no speed difference or smaller speed difference exists between an input shaft and an output shaft, so that the break of the gears or unstable running during the gear shifting process can be avoided.
Description
Technical field
The invention discloses a kind of electric vehicle transmission, and the shifting control method of this change-speed box, especially a kind of can be through the change-speed box and the shifting control method of circuit control carrying out intelligent speed changing.
Background technology
The power of electro-tricycle is to be provided by drive motor, and this drive motor is generally dc brushless motor (normally selecting the motor of 1KW/3000rpm for use), in order to improve the cargo capacity of three-wheel vehicle, generally improves torque through reducing gear.Always see that according to kinetic current power system principle of work scheme drawing is as shown in Figure 3, the torque of the drive motor 2 of this system is transferred to wheel 6 through reducing gear 5.After the transmitting ratio of reducing gear 5 was confirmed, the maximum speed of three-wheel vehicle and maximum cargo capacity were just confirmed, can't be changed.When usually using, speed no-load and high operation sometimes need be fully loaded with low cruise sometimes, need be with sometimes to carry and go up a slope, and this is that the reducing gear of stable drive ratio does not just satisfy operating needs.
In order to solve the problems of the technologies described above; But the battery-driven car power drive system that gear shift occurred is owing to the maximum speed of revolution of dc brushless motor is confirmed, so work as the maximum speed that the transmitting ratio that changes reducing gear just can change car; This available change speed gear box is realized; But the electro-tricycle power system principle of work of gear shift such as Fig. 4 and shown in Figure 5 have two groups of train of reduction gears in the speed-change gear box 1, are respectively 1 grade of train of reduction gears 141 and 2 grades of train of reduction gears 142; Through change gear group 13 and 1 grade of train of reduction gears 141 or 2 grades of train of reduction gears 142, just can realize the adjusting of the speed of a motor vehicle.But the gear shift of prior art also mainly is to realize gear shift through manually stirring control fork; Owing to change 2 grades or change 1 grade by 1 grade by 2 grades no matter be; Owing to all can have speed discrepancy between output shaft 13 and the input shaft 12, because the existence of this speed discrepancy can cause and break bad gear off with the fingers and thumb; Also can cause 1 grade of flat-out acceleration or 2 grades of unexpected deceleration of changing a grade of changing 2 grades, cause driving unstable and cause personnel or goods to fall three-wheel vehicle.
Summary of the invention
The objective of the invention is to have proposed a kind of electric vehicle transmission and shifting control method to the above-mentioned technical matters that exists in the prior art, this change-speed box and shifting control method can be realized the smooth conversion between 1 grade and 2 grades intelligently through circuit control.
Of the present invention through following technical scheme realization:
A kind of electric vehicle transmission comprises speed-change gear box, drive motor and drive motor controller; In the shell of described speed-change gear box, be provided with input shaft and output shaft; Between said input shaft and output shaft, pass through the gearshift transmission; This gearshift comprises change gear group, 1 grade of train of reduction gears and 2 grades of train of reduction gears, said change gear group and 1 grade of train of reduction gears engaged transmission or with 2 grades of train of reduction gears engaged transmission; Said speed-change gear box also comprises gear shifting motor, and this gear shifting motor moves grade gear cluster through the screw mandrel endless belt and 1 grade of train of reduction gears meshes or meshes with 2 grades of train of reduction gears; Also comprise controller for shifting, this controller for shifting comprises: the shift command receiving element receives user's shift command information, and this command information is passed to the center calculation unit; The input speed detecting unit detects the speed-change gear box input shaft rotational speed, and this tachometer value is passed to the center calculation unit; Gear shifting motor control unit, the gear shifting motor that the center calculation unit is made just/the inversion timing instruction is converted into gear shifting motor can the recognized action signal, and then the forward or reverse of control gear shifting motor; The input speed control unit, the rotary speed instruction that the center calculation unit is made is converted into the control signal that drive motor controller can be discerned, and then through drive motor controller controlling and driving rotating speed of motor; The center calculation unit; According to shift command signal due in speed-change gear box input shaft rotational speed, the transmitting ratio of 1 grade of train of reduction gears, the transmitting ratio of 2 grades of train of reduction gears; The rotary speed instruction signal that calculates the required rotating speed of input shaft when the change gear group is meshed with 1 grade of train of reduction gears or 2 grades of train of reduction gears in the gearshift procedure is issued the input speed control unit, calculate gear shifting motor (15) just/the inversion timing command signal issues the gear shifting motor control unit.
In the above-mentioned technical scheme of the present invention, preferred drive motor adopts dc brushless motor.
In the above-mentioned technical scheme of the present invention, said user instruction information comprises shift command information and the control information of car handle.
In the above-mentioned technical scheme of the present invention, the reduction ratio of preferred said 1 grade of train of reduction gears is 20: 1, and the reduction ratio of 2 grades of train of reduction gears is 10: 1.
According to above-mentioned electric gear-change, the shifting control method of this electric gear-change may further comprise the steps:
Step S1, the input speed detecting unit detects the speed of drive motor in real time;
Step S2, whether the center calculation unit judges has shift command; If not: execution in step S1, otherwise: if 1 grade is changed 2 grades and instructs then execution in step S31, if 2 grades are changed 1 grade of then execution in step S41;
Step S31, the center calculation unit calculates the target velocity of drive motor in the time of 2 grades;
Step S32 cuts off the control signal that the car handle is given drive motor controller, closes drive motor torque output;
Step S33, change gear group and 1 grade of train of reduction gears are thrown off;
Step S34, drive motor decelerate to change gear group and 2 grades of train of reduction gears engagements after the target velocity in the time of 2 grades;
Step S35 returns execution in step S5 after the drive motor controller with the control signal of car handle;
Step S41, the center calculation unit calculates the target velocity of drive motor in the time of 1 grade;
Step S42, judge that whether target velocity is greater than the drive motor maximum speed, if not: execution in step S45 then, otherwise: carry out:
Step S43 switches the control signal that the car handle is given drive motor controller, closes drive motor torque output, and car slows down;
Step S44 judges whether the speed of a motor vehicle sees target velocity, if not: and execution in step S43 then, otherwise: execution in step S46:
Step S45 cuts off the control signal that the car handle is given drive motor controller, closes drive motor torque output;
Step S46, change gear group and 2 grades of train of reduction gears are thrown off;
Step S34, drive motor decelerate to change gear group and 1 grade of train of reduction gears engagement after the target velocity in the time of 1 grade;
Step S35 returns execution in step S5 after the drive motor controller with the control signal of car handle;
Step S5, shift end.
The present invention can reach following useful technique effect: the employing gear shifting motor moves grade gear cluster through the screw mandrel endless belt and 1 grade of train of reduction gears meshes or meshes with 2 grades of train of reduction gears, the switching between 1 grade and 2 grades of realization intelligence; The present invention is through the control of controller for shifting; When between 1 grade and 2 grades, changing; After the gear target velocity that can be earlier motor speed is equaled to switch to; Make the change gear group again and will switch to gear train of reduction gears engaged transmission, make between input shaft and the output shaft not or less velocity contrast is arranged, it is unstable to avoid gear to break driving bad or when causing gear shift off with the fingers and thumb.
Description of drawings
The present invention will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the schematic diagram of electric vehicle transmission of the present invention;
Fig. 2 is the variable speed control diagram of circuit of electric vehicle transmission of the present invention;
Fig. 3 is the power system principle of work scheme drawing of first kind of prior art;
Fig. 4 is the power system principle of work scheme drawing of second kind of prior art;
Fig. 5 is the principle of work scheme drawing of speed-change gear box shown in Figure 4.
The specific embodiment
Disclosed all characteristics in this specification sheets, or the step in disclosed all methods or the process except mutually exclusive characteristic and/or the step, all can make up by any way.
Disclosed arbitrary characteristic in this specification sheets (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.
Like Fig. 1 is the schematic diagram of electric vehicle transmission of the present invention.A kind of electric vehicle transmission comprises speed-change gear box 1, drive motor 2 and drive motor controller 3; Speed-change gear box 1 is used for being in transmission connection and the adjusting of input and output transmitting ratio between power input (drive motor) and the takeoff output (wheel), and drive motor controller 3 can control to adjust the rotating speed of drive motor 2.In the shell of described speed-change gear box 1, be provided with input shaft 11 and output shaft 12; Between said input shaft 11 and output shaft 12, pass through the gearshift transmission; This gearshift comprises 13,1 grade of train of reduction gears 141 of change gear group and 2 grades of train of reduction gears 142, said change gear group 13 and 1 grade of train of reduction gears 141 engaged transmission or with 2 grades of train of reduction gears 142 engaged transmission; Said speed-change gear box 1 also comprises gear shifting motor 15, and this gear shifting motor 15 moves grade gear cluster 13 through the screw mandrel endless belt and 1 grade of train of reduction gears 141 meshes or meshes with 2 grades of train of reduction gears 142.
Above-mentioned speed-change gear box 4 principle of work: mainly be made up of two groups of different 141,2 grades of train of reduction gears 142 of 1 grade of train of reduction gears and change gear group 13, gear shifting motor 15, input shaft 11, output shafts 12 of transmitting ratio in the opinion change speed gear box 4 that is somebody's turn to do, wherein the mouth of two groups of train of reduction gears links to each other with output shaft 12 all the time; Change gear group 13 input ends are meshed with input shaft 11 all the time; Mouth can be meshed with 1 grade of reducing gearbox 141 or 2 grades of reducing gearboxs 142; Gear shifting motor 15 drives change gear group 13 and moves; Can realize change gear group 13 at 141,2 grades of reducing gearboxs 142 of 1 grade of reducing gearbox, thereby change the transmitting ratio of input shaft 11 and output shaft 12, promptly realize gear shift.Because 1 grade of train of reduction gears 141 is different with the transmitting ratio of 2 grades of train of reduction gears 142; And the battery-driven car or the electric three-wheel speed of a motor vehicle are constant basically (because shift time is very short in the gearshift procedure; The rotating speed of output shaft 12 is constant basically), the input end rotating speed of two groups of train of reduction gears differs greatly, and realize does not have the smooth gear change of impact; Just must adjust the rotating speed of change gear group 13 mouths, it is basic identical to make it fundamental sum train of reduction gears input end rotating speed.Because the input shaft 11 of speed-change gear box 4 links to each other with drive motor 2, so the rotating speed of adjustment drive motor 2 just can change the mouth rotating speed of change gear group 13.Electric vehicle transmission of the present invention also comprises controller for shifting 4, and this controller for shifting 4 is exactly to be used for adjusting drive motor 2 rotating speeds and gear shifting motor 15 action sequences, to guarantee smooth smooth gear change.
Above-mentioned input shaft 11 is used for change gear group 13 and is connected with external power supply (drive motor 2), is used for connecting the axle of drive motor 2 and the axle of change gear group 13 here; Output shaft 12 is used for being connected with external loading, is used for connecting axletree here, and axletree is used for fixing wheel; Change gear group 13 can move under gear shifting motor 15 drives, be used for input shaft 11 pass through 1 grade of train of reduction gears 141 or 2 grades of train of reduction gears 142 kinetic energy drive to output shaft 12; Gear shifting motor 6 is used to drive change gear group 13, makes change gear group 13 and 1 grade of train of reduction gears 141 mesh or mesh with 2 grades of train of reduction gears 142; 1 grade of train of reduction gears 141, transmitting ratio is fixed, and it is 20: 1 train of reduction gears that the present invention adopts transmitting ratio, is used to connect change gear group 13 and output shaft 12, realizes the deceleration of input shaft 11 and output shaft 12; 2 grades of train of reduction gears 142, transmitting ratio is fixed, and it is 10: 1 train of reduction gears that the present invention adopts reduction ratio, is used to connect change gear group 13 and output shaft 12, realizes the deceleration of input shaft 11 and output shaft 12.
Electric vehicle transmission of the present invention; Above-mentioned controller for shifting 4; Be used to be controlled at the rotating speed of conversion moment power input shaft 11 between 1 grade and 2 grades and the action sequence of gear shifting motor 15; The rotating speed of power input shaft 11 and the speed of power take-off shaft 12 are complementary, do not have velocity shock between the gear when guaranteeing gear shift, gear shift is smooth and easy.This controller for shifting 4 comprises: shift command receiving element 41; This shift command receiving element 41 is used to receive user's shift command information; And this command information passed to center calculation unit 43, said shift command information comprises shift command information and the control information of car handle; Input speed detecting unit 42 is used to detect the rotating speed of speed-change gear box 1 input shaft 11, and this tachometer value is passed to center calculation unit 43; Gear shifting motor control unit 45; The gear shifting motor that is used for center calculation unit 43 is made just/the inversion timing instruction is converted into gear shifting motor 15 can the recognized action signals; And then the forward or reverse of control gear shifting motor 15, and then drive change gear group 13 and mesh with 141 engagements of 1 grade of train of reduction gears or with 2 grades of train of reduction gears 142; Input speed control unit 44 is used for the rotary speed instruction that center calculation unit 43 is made is converted into the control signal that drive motor controller 3 can be discerned, and then passes through the rotating speed of drive motor controller 3 controlling and driving motors 2; Center calculation unit 43; According to the transmitting ratio of the rotating speed of shift command signal due in speed-change gear box 1 input shaft 11,1 grade of train of reduction gears, the transmitting ratio of 2 grades of train of reduction gears; The rotary speed instruction signal that calculates input shaft 11 required rotating speeds when change gear group 13 is meshed with 1 grade of train of reduction gears or 2 grades of train of reduction gears in the gearshift procedure is issued input speed control unit 44, calculate gear shifting motor 15 just/the inversion timing command signal issues gear shifting motor control unit 45.
Above-mentioned speed-change gear box 4 principle of work; Mainly be made up of two groups of different 141,2 grades of train of reduction gears 142 of 1 grade of train of reduction gears and change gear group 13, gear shifting motor 15, input shaft 11, output shafts 12 of transmitting ratio in this speed-changing gear box 4, wherein the mouth of two groups of train of reduction gears links to each other with output shaft 12 all the time; Change gear group 13 input ends are meshed with input shaft 11 all the time; Mouth can be meshed with 1 grade of reducing gearbox 141 or 2 grades of reducing gearboxs 142; Gear shifting motor 15 drives change gear group 13 and moves; Can realize change gear group 13 at 141,2 grades of reducing gearboxs 142 of 1 grade of reducing gearbox, thereby change the transmitting ratio of input shaft 11 and output shaft 12, promptly realize gear shift.
A kind ofly realize that the shifting control method of above-mentioned electric gear-change is as shown in Figure 2, may further comprise the steps:
Step S1, the input speed detecting unit detects the speed of drive motor in real time; Because drive motor 2 is connected with input shaft 11, therefore detect the rotating speed that rotating speed of motor can be learnt input shaft 11, can directly detect the rotating speed of input shaft 11, but it is relatively easy to detect drive motor 2 rotating speeds, scheme is simple;
Step S2, whether the center calculation unit judges has shift command, execution in step S1 if not, otherwise, if 1 grade is changed 2 grades and instructs then execution in step S31, if 2 grades are changed 1 grade of then execution in step S41; Center calculation unit 43 can receive user's shift command signal through shift command receiving element 41; If there is not this center calculation unit 43 of shift command signal input, then continues execution in step S1, otherwise just judge that this shift command signal is 1 grade and changes 2 grades of command signals or 2 grades are changed 1 grade of command signal; If 1 grade is changed 2 grades of command signals; Execution in step S31 then is if 2 grades are changed one grade of command signal, then execution in step S41;
Step S31, the center calculation unit calculates the target velocity of drive motor in the time of 2 grades; Because 1 grade of train of reduction gears 141 is different with the reduction ratio of 2 grades of train of reduction gears 142; Therefore 1 grade of target velocity with 2 grades input shaft 11 is also different; Because input shaft 11 is connected with drive motor 2, the rotating speed that therefore can directly measure drive motor 2 obtains the rotating speed of input shaft 11.
Step S32 cuts off the control signal that the car handle is given drive motor controller, closes drive motor torque output;
Step S33, change gear group and 1 grade of train of reduction gears are thrown off;
Step S34, drive motor decelerate to change gear group and 2 grades of train of reduction gears engagements after the target velocity in the time of 2 grades;
Step S35 returns execution in step S5 after the drive motor controller with the control signal of car handle;
Step S41, the center calculation unit calculates the target velocity of drive motor in the time of 1 grade;
Whether step S42 judges target velocity greater than the drive motor maximum speed, execution in step S45 then if not, otherwise carry out:
Step S43 switches the control signal that the car handle is given drive motor controller, closes drive motor torque output, and car slows down;
Step S44 judges whether the speed of a motor vehicle sees target velocity, execution in step S43 then if not, otherwise execution in step S46:
Step S45 cuts off the control signal that the car handle is given drive motor controller, closes drive motor torque output;
Step S46, change gear group and 2 grades of train of reduction gears are thrown off;
Step S34, drive motor decelerate to change gear group and 1 grade of train of reduction gears engagement after the target velocity in the time of 1 grade;
Step S35 returns execution in step S5 after the drive motor controller with the control signal of car handle;
Step S5, shift end.
In the embodiments of the invention, adopting the transmitting ratio of 1 grade of train of reduction gears 141 is 20: 1, and the reduction ratio of 2 grades of train of reduction gears 142 is 10: 1, and promptly the transmitting ratio of 1 grade of train of reduction gears 141 is twices of 2 grades of train of reduction gears 142.When change gear group 13 and 1 grade of train of reduction gears 141 were meshed, the speed of a motor vehicle was slower, is 1 grade; When change gear group 13 and 2 grades of train of reduction gears 142 were meshed, the speed of a motor vehicle was very fast, is 2 grades.
(1) car is changed to 2 grades by 1 grade: when car is in 1 P PARK Position P; Change gear group 13 and 1 grade of train of reduction gears 141 are meshed; Because the difference of two train of reduction gears reduction ratios, the rotating speed of 1 grade of train of reduction gears 141 input end is twices of 2 grades of train of reduction gears 142 input end rotating speeds.Want to realize 1 grade to 2 grades classless shifting, change gear group 13 disengages to when being meshed with 2 grades of train of reduction gears 142 from 1 grade of train of reduction gears 141, and the mouth rotating speed of change gear group 13 must be equal basically with the input end rotating speeds of 2 grades of train of reduction gears 142.Because the gearshift procedure time is very short; The speed of a motor vehicle changes very little (can think constant basically); This just requires change gear group 13 to disengage to when being meshed with 2 grades of train of reduction gears 142 from 1 grade of train of reduction gears 141, and the speed of change gear group 13 should be reduced to the half the of former speed.In addition, will guarantee also during gear shift that change gear group 13 and 1 grade of train of reduction gears 141 can throw off smoothly, change gear group 13 and 2 grades of train of reduction gears 142 can mesh fully then.
(2) car is changed to 1 grade by 2 grades: when car is in 2 P PARK Position Ps; Change gear group 13 and 2 grades of train of reduction gears 142 are meshed; Because the difference of two train of reduction gears reduction ratios, the rotating speed of 1 grade of train of reduction gears 141 input end is twices of 2 grades of train of reduction gears 142 input end rotating speeds.Want to realize 2 grades to 1 grade classless shiftings, change gear group 13 disengages to when being meshed with 1 grade of train of reduction gears 141 from 2 grades of train of reduction gears 142, and the mouth rotating speed of change gear group 13 must be equal basically with the input end rotating speed of 1 grade of train of reduction gears 141.Because the gearshift procedure time is very short; The speed of a motor vehicle changes very little (can think constant basically); This just requires change gear group 13 to disengage to when being meshed with 1 grade of train of reduction gears 141 from 2 grades of train of reduction gears 142, and the speed of change gear group 13 should be increased to a times of former speed.If gear shift constantly drive motor 2 has operated in maximum speed or half the greater than maximum speed, want to let the speed of drive motor 2 be increased to constantly one times of gear shift again, obviously impossible.At this moment; Should let change gear group 13 and 2 grades of train of reduction gears 142 keep engagement earlier, let car slow down simultaneously, when drive motor 2 speed are reduced to the half smaller or equal to maximum speed; Start gear shifting motor 15; Change gear group 13 and 2 grades of train of reduction gears 142 are thrown off, make drive motor 2 accelerate to maximum speed, then with change gear group 13 and 1 grade of train of reduction gears 141 engagement.
The present invention is not limited to the aforesaid specific embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (5)
1. an electric vehicle transmission comprises speed-change gear box (1), drive motor (2) and drive motor controller (3); In the shell of described speed-change gear box (1), be provided with input shaft (11) and output shaft (12); Between said input shaft (11) and output shaft (12), pass through the gearshift transmission; This gearshift comprises change gear group (13), 1 grade of train of reduction gears (141) and 2 grades of train of reduction gears (142), said change gear group (13) and 1 grade of train of reduction gears (141) engaged transmission or with 2 grades of train of reduction gears (142) engaged transmission; It is characterized in that said speed-change gear box (1) also comprises gear shifting motor (15), this gear shifting motor (15) is moved a grade gear cluster (13) through the screw mandrel endless belt and is meshed with 1 grade of train of reduction gears (141) engagement or with 2 grades of train of reduction gears (142);
Also comprise controller for shifting (4), this controller for shifting (4) comprising:
Shift command receiving element (41) receives user's shift command information, and this command information is passed to center calculation unit (43);
Input speed detecting unit (42) detects the rotating speed of speed-change gear box (1) input shaft (11), and this tachometer value is passed to center calculation unit (43);
Gear shifting motor control unit (45), the gear shifting motor that center calculation unit (43) are made just/the inversion timing instruction is converted into gear shifting motor (15) can the recognized action signal, and then the forward or reverse of control gear shifting motor (15);
Input speed control unit (44), the rotary speed instruction that center calculation unit (43) are made is converted into the control signal that drive motor controller (3) can be discerned, and then passes through the rotating speed of drive motor controller (3) controlling and driving motor (2);
Center calculation unit (43); According to the transmitting ratio of the rotating speed of shift command signal due in speed-change gear box (1) input shaft (11), 1 grade of train of reduction gears, the transmitting ratio of 2 grades of train of reduction gears; The rotary speed instruction signal that calculates the required rotating speed of input shaft (11) when change gear group (13) is meshed with 1 grade of train of reduction gears or 2 grades of train of reduction gears in the gearshift procedure is issued input speed control unit (44), calculate gear shifting motor (15) just/the inversion timing command signal issues gear shifting motor control unit (45).
2. electric vehicle transmission according to claim 1 is characterized in that, said drive motor (2) is a dc brushless motor.
3. electric vehicle transmission according to claim 1 is characterized in that, said user instruction information comprises shift command information and the control information of car handle.
4. electric vehicle transmission according to claim 1 is characterized in that, the reduction ratio of said 1 grade of train of reduction gears is 20: 1, and the reduction ratio of 2 grades of train of reduction gears is 10: 1.
5. the shifting control method of electric gear-change as claimed in claim 1 is characterized in that, comprises step:
Step S1, the input speed detecting unit detects the speed of drive motor in real time;
Step S2, whether the center calculation unit judges has shift command, if not: execution in step S1 then, otherwise: if 1 grade is changed 2 grades and instructs then execution in step S31, if 2 grades are changed 1 grade of then execution in step S41;
Step S31, the center calculation unit calculates the target velocity of drive motor in the time of 2 grades;
Step S32 cuts off the control signal that the car handle is given drive motor controller, closes drive motor torque output;
Step S33, change gear group and 1 grade of train of reduction gears are thrown off;
Step S34, drive motor decelerate to change gear group and 2 grades of train of reduction gears engagements after the target velocity in the time of 2 grades;
Step S35 returns execution in step S5 after the drive motor controller with the control signal of car handle;
Step S41, the center calculation unit calculates the target velocity of drive motor in the time of 1 grade;
Step S42, judge that whether target velocity is greater than the drive motor maximum speed, if not: execution in step S45 then, otherwise: carry out:
Step S43 switches the control signal that the car handle is given drive motor controller, closes drive motor torque output, and car slows down;
Step S44 judges whether the speed of a motor vehicle sees target velocity, if not: and execution in step S43 then, otherwise: execution in step S46;
Step S45 cuts off the control signal that the car handle is given drive motor controller, closes drive motor torque output;
Step S46, change gear group and 2 grades of train of reduction gears are thrown off;
Step S34, drive motor decelerate to change gear group and 1 grade of train of reduction gears engagement after the target velocity in the time of 1 grade;
Step S35 returns execution in step S5 after the drive motor controller with the control signal of car handle;
Step S5, shift end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102063650A CN102717863A (en) | 2012-06-21 | 2012-06-21 | Electric vehicle speed changer and speed change control method |
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| CN2012102063650A CN102717863A (en) | 2012-06-21 | 2012-06-21 | Electric vehicle speed changer and speed change control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883727A (en) * | 2013-12-31 | 2014-06-25 | 江苏陆地方舟新能源电动汽车有限公司 | Automatic shift control system and method for electric vehicles |
| CN106114492A (en) * | 2016-06-28 | 2016-11-16 | 泰州市海博汽车科技有限公司 | New-energy automobile automatic transmission power gear-shifting control system and control method |
| CN108860444A (en) * | 2017-05-09 | 2018-11-23 | 摩特动力工业股份有限公司 | ECVT system and control method thereof |
-
2012
- 2012-06-21 CN CN2012102063650A patent/CN102717863A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883727A (en) * | 2013-12-31 | 2014-06-25 | 江苏陆地方舟新能源电动汽车有限公司 | Automatic shift control system and method for electric vehicles |
| CN106114492A (en) * | 2016-06-28 | 2016-11-16 | 泰州市海博汽车科技有限公司 | New-energy automobile automatic transmission power gear-shifting control system and control method |
| CN108860444A (en) * | 2017-05-09 | 2018-11-23 | 摩特动力工业股份有限公司 | ECVT system and control method thereof |
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Application publication date: 20121010 |