CN104279318B - The pulsewidth modulations of many gear line traffic control automatic transmission are reversed gear starting control method - Google Patents
The pulsewidth modulations of many gear line traffic control automatic transmission are reversed gear starting control method Download PDFInfo
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- CN104279318B CN104279318B CN201410469239.3A CN201410469239A CN104279318B CN 104279318 B CN104279318 B CN 104279318B CN 201410469239 A CN201410469239 A CN 201410469239A CN 104279318 B CN104279318 B CN 104279318B
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- automatic transmission
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/32—Electric motors actuators or related electrical control means therefor
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses the pulsewidth modulation of a kind of many gear line traffic control automatic transmission to reverse gear starting control method, the method is by setting starting end of a period vehicle speed valuev 0, fixed cycles control the cycleT 0, detect R position switch signal, the GES of vehicle speed sensorv, by ECU by circulation energising pulsewidth functionT(v)=(1+α)T δ +βT δ v/v 0 Determined by circulation energising pulse-width controlled reverse gear the energising pulsewidth of electromagnetic clutch, realize line traffic control automatic transmission to reverse gear starting control, this starting control method can meet the driving habits of different driver, it is to avoid starting-up process engine misses, it is achieved line traffic control automatic transmission gentle start.
Description
Technical field
The present invention relates to the control method of a kind of automatic transmission, more precisely a kind of many gear line traffic control automatic transmission
Pulsewidth modulation reverse gear starting control method.
Background technology
Automatic transmission is widely used in the various vehicles such as automobile, electric automobile, engineering machinery.Existing automatic transmission
Mainly there are hydraulic mechanical type automatic transmission (AT), metal band type ST (CVT), automatic mechanical transmission
(AMT), double-clutch automatic transmission (DCT) four major types.
Above-mentioned four class automatic transmission all use electric-controlled hydraulic servomechanism installation, it is achieved shift process controls, and structure is complicated, one-tenth
This height and add control difficulty and complexity.The actuator of especially DCT includes: by hydraulic pump, hydraulic valve and accumulator
The oil supply mechanism of composition, by hydraulic pressure or motor-driven gear shifting actuating mechanism, by hydraulic pressure or motor-driven clutch control machine
Structure.These hydraulic controls make variator complicated integral structure, cost high and add control difficulty and complexity.
Along with automotive electronic technology, the extensive application of the progressively ripe and automobile network communication technology of automatic control technology,
X-by-wire on Automobile has become the development trend that automobile is following；Automobile line traffic control (X-By-Wire) technology is exactly with electric wire and electronics
Controller replaces mechanically and hydraulically system, and through sensor, the control action of driver is become the signal of telecommunication, is input to automatically controlled
Unit, is produced control signal by ECU and drives actuator to carry out action required.X-by-wire on Automobile can reduce parts
Complexity, reduce hydraulic pressure and mechanical driving device, electric wire move towards the motility of layout simultaneously, expands the freedom of Automobile Design
Space.
The each forward gear high gears keeping off the formula line traffic control automatic transmission that is circular layout often engage with flywheel inside engaged gear more,
The high gear that reverses gear often engages with central external gear pump, and electromagnetic clutch controls each gear high gear and separates with driving gear
With joint, each gear driven gear on transmission countershaft is outputed power by planetary gears；This many baffle rings shape cloth
The electromagnetic clutch putting formula line traffic control automatic transmission uses line traffic control mode power shifting, without skidding and power interruption phenomenon.
For guaranteeing to keep off the gentle start of line traffic control automatic transmission, it is to avoid the engine misses in starting-up process, adapt to not more
With driver's fast starting or the slow driving habitses such as starting that accelerate, the starting-up processes of many gear line traffic control automatic transmission are entered by needs
Row controls.
Summary of the invention
It is an object of the invention to provide and a kind of can either consider driver intention and adapt to different driving habits, again can
The pulsewidth modulation of the many gears line traffic control automatic transmission realizing vehicle gentle start is reversed gear starting control method.A kind of many gear line traffic controls are certainly
The pulsewidth modulation of dynamic variator is reversed gear starting control method, it is achieved many gears line traffic control automatic transmission of this starting control method of reversing gear
Control device include electromotor, vehicle speed sensor, D position switch, ECU, reverse gear electromagnetic clutch.
Technical scheme is as follows:
After electromotor starting ignition, ECU powers on, and the pulsewidth modulation of many gear line traffic control automatic transmission is reversed gear and started to walk to control
Method processed brings into operation, and this control method comprises the following steps:
Step 1, ECU detection R position switch signal and the GES v of vehicle speed sensor；
Step 2, judge whether to be linked into R gear: when ECU detects that R position switch signal is connected, it is judged that for line traffic control oneself
Dynamic variator is linked into R gear, carries out step 3；Otherwise, when ECU detects R position switch signal access failure, it is judged that for line traffic control
Automatic transmission is not linked into R gear, carries out step 1；
Step 3, judge that the GES v of vehicle speed sensor is whether less than starting end of a period vehicle speed value v0: when ECU is examined
Measure the GES v of vehicle speed sensor less than starting end of a period vehicle speed value v0Time, carry out step 4；Otherwise, detect when ECU
GES v to vehicle speed sensor is more than or equal to starting end of a period vehicle speed value v0Time, starting control process of reversing gear terminates；
Step 4, starting loop control of reversing gear: ECU controls cycle T according to fixed cycles0=(1+α+β)Tδ, by circulation
Energising pulsewidth function T (v)=(1+ α) Tδ+βTδv/v0Determined by circulation energising pulse-width controlled reverse gear the energising arteries and veins of electromagnetic clutch
Width, carries out starting loop control of reversing gear, T in formulaδDuring for eliminating the minimum energising required for the electromagnetic clutch Separation that reverses gear
Between, α is initial increase pulse width time coefficient, and β is that speed is relevant increases pulse width time coefficient.
The starting that the pulsewidth modulation of above-mentioned many gear line traffic control automatic transmission is reversed gear in starting control method described in step 3 ends
Vehicle speed value v0It is the fixed value set, v0=5～10km/h；The initial pulse width time factor alpha that increases described in step 4 is to set
A fixed value, α=0.1～0.5；Speed described in step 4 be correlated with increase pulse width time factor beta be set one fix
Value, β=0.1～0.5.
The circulation of energising pulsewidth of electromagnetic clutch of controlling to reverse gear pulsewidth function T (v) that is energized is the function of speed v, thus
The size of circulation energising pulsewidth changes with the change of speed, again owing to the change of speed is by driver's control, therefore this control
Method can adapt to different driving habitses.
Compared with prior art, its advantage is the present invention:
(1) pulsewidth modulation of many gears line traffic control automatic transmission of the present invention is reversed gear starting control method, according to fixed cycles
The control cycle, the method using pulse width modulation, the energising pulsewidth of electromagnetic clutch, control is controlled by circulation energising pulsewidth function
Simple and flexible processed, dynamic response is good；
(2) pulsewidth modulation of many gears line traffic control automatic transmission of the present invention is reversed gear starting control method, ECU according to
The change of speed, controls each energising pulsewidth of electromagnetic clutch of controlling to reverse gear in circulation by circulation energising pulsewidth function, low
During speed, the energising pulse width time of the electromagnetic clutch that reverses gear is short, and the engaging time of the electromagnetic clutch that reverses gear controls week with fixed cycles
The ratio of phase is low；Along with the raising of speed, the energising pulse width time of the electromagnetic clutch that reverses gear increases, connecing of the electromagnetic clutch that reverses gear
Conjunction time and fixed cycles control the ratio in cycle and improve.So can not only avoid engine misses in starting-up process, it is achieved
The gentle start of vehicle, and custom is accelerated in the starting that can adapt to different drivers.
Accompanying drawing explanation
Fig. 1 is a gear of many gears line traffic control automatic transmission of the embodiment of the present invention and the control device that reverses gear and actuating device
Structural representation.
Fig. 2 is a gear and the two control device kept off and the actuating devices of many gears line traffic control automatic transmission of the embodiment of the present invention
Structural representation.
Fig. 3 is three gears and the four control device kept off and the actuating devices of many gears line traffic control automatic transmission of the embodiment of the present invention
Structural representation.
Fig. 4 is that the pulsewidth modulation of the embodiment of the present invention many gears line traffic control automatic transmission is reversed gear starting control method flow chart.
Fig. 5 is that the reverse gear speed of starting control method of the pulsewidth modulation of the embodiment of the present invention many gears line traffic control automatic transmission becomes
Change process and the electromagnetic clutch circulation energising pulse width variations curve synoptic diagram that reverses gear.
In figure: 1. transmission input shaft 2. housing 200. electromotor 24. transmission countershaft 25. variator output
Axle 3. flywheel 3a. power intake 3b. clutch end 31. flywheel inside engaged gear 32. central authorities external gear pump 33.
Idler gear 41. 1 gear electromagnetic clutch 411. 1 gear electromagnetic clutch slip ring 412. 1 keeps off electromagnetic clutch brush 42. 2
Gear electromagnetic clutch 421. 2 gear electromagnetic clutch slip ring 422. 2 gear electromagnetic clutch brush 43. 3 keeps off electromagnetic clutch
431. 3 gear electromagnetic clutch slip ring 432. 3 gear electromagnetic clutch brush 44. 4 gear electromagnetic clutchs 441. 4 keep off electromagnetism
The clutch slip ring 442. 4 gear electromagnetic clutch brush 4R. electromagnetic clutch 4R1. that reverses gear reverses gear electromagnetic clutch slip ring
The 4R2. electromagnetic clutch brush 4Z1. mono-that reverses gear keeps off main shaft 4Z2. bis-and keeps off main shaft 4Z3. tri-and keep off main shaft 4Z4. tetra-and keep off main shaft
4ZR. reverse gear main shaft 51. 1 gear high gear 52. 2 gear high gear 53. 3 gear high gear 54. 4 keep off high gear
5R. reverse gear high gear 61. 1 gear driving gear 62. 2 gear driving gear 63. 3 gear driving gear 64. 4 keep off driving tooth
Wheel 6R. reverse gear driving gear 71. 1 gear driven gear 72. 2 gear driven gear 73. 3 gear driven gear 74. 4 gear from
Moving gear 7R. reverses gear driven gear 91. sun gear 92. planetary gear 93. gear ring 94. planet carrier 100. ECU
100a. mono-keep off the sub-100b. in control output end bis-keep off the sub-100c. in control output end tri-keep off control output end sub-100d. tetra-gear control
Lead-out terminal 100r. processed reverses gear control output end sub-VSS. vehicle speed sensor R-SW.R position switch.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is described in detail,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments；Based on the reality in the present invention
Executing example, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise broadly falls into
The scope of protection of the invention.
The pulsewidth modulation of a kind of many gear line traffic control automatic transmission is reversed gear starting control method, it is achieved the embodiment of the present invention is many
The control device of gear line traffic control automatic transmission includes electromotor 200, vehicle speed sensor VSS, D position switch D-SW, ECU
100, reverse gear electromagnetic clutch 4R.
It is installed with gear electromagnetic clutch brush 412, a two gear electromagnetic clutch brush 422, three on housing 2 and keeps off electromagnetism
Clutch brush 432, four keeps off electromagnetic clutch brush 442, reverse gear electromagnetic clutch brush 4R2, a gear electromagnetic clutch brush
412, two gear electromagnetic clutch brush 422, three gear electromagnetic clutch brushes 432, four keep off electromagnetic clutch brushes 442, reverse gear electricity
Magnet clutch brush 4R2 keeps off electromagnetic clutch with gear electromagnetic clutch slip ring 411, a two gear electromagnetic clutch slip ring 421, three respectively
Device slip ring 431, four gear electromagnetic clutch slip ring 441, the electromagnetic clutch slip ring 4R1 that reverses gear keep sliding contact；One gear electromagnetism from
The binding post of clutch brush 412, the two gear binding posts of electromagnetic clutch brush 422, three gear electromagnetic clutch brushes 432
Binding post, the four gear binding posts of electromagnetic clutch brush 442, the binding post difference of the electromagnetic clutch brush 4R2 that reverses gear
The sub-100a in control output end, the two gear 100b in control output end, three gear control outputs are kept off by wire and the one of ECU 100
Terminal 100c, four the gear 100d in control output end, the sub-100r in control output end of reversing gear are connected.
ECU 100 is by controlling gear electromagnetic clutch brush 412, two gear electromagnetic clutch brush 422, a three gear electricity
Magnet clutch brush 432, four gear electromagnetic clutch brush 442, the energising of the electromagnetic clutch brush 4R2 that reverses gear or power-off, control
One gear electromagnetic clutch 41, two gear electromagnetic clutch 42, three gear electromagnetic clutch 43, four keeps off electromagnetic clutch 44, reverse gear electromagnetism
The joint of clutch 4R and separation；ECU 100 keeps off electromagnetic clutch by controlling a gear electromagnetic clutch brush 412, two
Brush 422, three gear electromagnetic clutch brush 432, four gear electromagnetic clutch brush 442, the electromagnetic clutch brush 4R2 that reverses gear logical
Electricity pulsewidth or the size of energising dutycycle, control gear electromagnetic clutch 41, a two gear electromagnetic clutch 42, three and keep off electromagnetic clutch
43, four gear electromagnetic clutch 44, the reverse gear joint of electromagnetic clutch 4R and the speed of separation.
The actuating device of the many gears line traffic control automatic transmission realizing the embodiment of the present invention includes transmission input shaft 1, flywheel
3, transmission countershaft 24, transmission output shaft 25, housing 2；One end of flywheel 3 is power intake 3a, power intake 3a
It is connected with one end of transmission input shaft 1；The other end of flywheel 3 is clutch end 3b, and clutch end 3b is provided with flywheel
Inside engaged gear 31 and central authorities' external gear pump 32；The outside of the centrally located external gear pump of flywheel inside engaged gear 31 32；?
Be fixedly connected sequentially on transmission countershaft 24 driven gear 7R, four gear driven gears 74, the three gear driven gears 73, two of reversing gear
Gear driven gear 72, keeps off driven gear 71, and one end away from flywheel 3 of countershaft 24 is also fixedly connected with the sun in the transmission
Wheel 91.
Flywheel inside engaged gear 31 along inside its gear circumference successively with gear high gear 51, a two gear high gear 52,
Three gear high gear 53, four gear high gears 54 often engage；On each forward gear high gear and empty set countershaft 24 in the transmission
Idler gear 33 often engage；Central authorities' external gear pump 32 often engages with the high gear 5R that reverses gear.
One gear high gear 51, two gear high gear 52, three gear high gear 53, four gear high gear 54 keeps off with one respectively
The Partner of electromagnetic clutch 41, the two gear Partner of electromagnetic clutch 42, the three gear Partner of electromagnetic clutch 43, four gear electricity
The Partner of magnet clutch 44 connects；The one gear drive end of electromagnetic clutch 41, the two gear drive ends of electromagnetic clutch 42, three gears
The drive end of electromagnetic clutch 43, four gear electromagnetic clutchs 44 drive ends respectively by one gear main shaft 4Z1, two gear main shaft 4Z2,
Three gear main shaft 4Z3, four gear main shaft 4Z4 and gear driving gear 61, two gear driving gear 62, three gear driving gear 63, four gear are main
Moving gear 64 connects；One gear driving gear 61, two gear driving gear 62, three gear driving gear 63, four gear driving gear 64 is respectively
Often engage with gear driven gear 71, two gear driven gear 72, three gear driven gear 73, a four gear driven gear 74.
Reverse gear high gear 5R and be connected with the Partner of the electromagnetic clutch 4R that reverses gear；Reverse gear the drive end of electromagnetic clutch 4R
Driving gear 6R is connected with reversing gear；The driving gear 6R that reverses gear often engages with the driven gear 7R that reverses gear by reversing gear main shaft 4ZR.
Sun gear 91 often engages with planetary gear 92, and planetary gear 92 also often engages with gear ring 93, and planetary gear 92 passes through
Its center bearing bore rolls and is arranged on planet carrier 94, and planet carrier 94 is fixed on case of transmission 2, and gear ring 93 is connected by spline
In one end of transmission output shaft 25, the other end of transmission output shaft 25 is as transmission power outfan.
Each advance of many gears line traffic control automatic transmission of the embodiment of the present invention is further illustrated below in conjunction with Fig. 1, Fig. 2, Fig. 3
Gear and the power transmission line reversed gear.
One gear transmission: ECU 100 controls gear electromagnetic clutch 41 energising and engages, and remaining electromagnetic clutch power-off divides
From, the moment of torsion of transmission input shaft 1 passes to a gear high gear 51 by flywheel inside engaged gear 31, then by the one of joint
Power is transferred to sun gear 91, finally by the engagement of a gear driving gear 61 and a gear driven gear 71 by gear electromagnetic clutch 41
Exported to transmission output shaft 25 by the spline on gear ring 93, it is achieved a gear transmission.
Two gear transmissions: ECU 100 controls two gear electromagnetic clutch 42 energisings and engages, and remaining electromagnetic clutch power-off divides
From, the moment of torsion of transmission input shaft 1 passes to two gear high gears 52 by flywheel inside engaged gear 31, then by the two of joint
Power is transferred to sun gear 91, finally by the engagement of two gear driving gears 62 and two gear driven gears 72 by gear electromagnetic clutch 42
Exported to transmission output shaft 25 by the spline on gear ring 93, it is achieved two gear transmissions.
Three gear transmissions: ECU 100 controls three gear electromagnetic clutch 43 energisings and engages, and remaining electromagnetic clutch power-off divides
From, the moment of torsion of transmission input shaft 1 passes to three gear high gears 53 by flywheel inside engaged gear 31, then by the three of joint
Power is transferred to sun gear 91, finally by the engagement of three gear driving gears 63 and three gear driven gears 73 by gear electromagnetic clutch 43
Exported to transmission output shaft 25 by the spline on gear ring 93, it is achieved three gear transmissions.
Four gear transmissions: ECU 100 controls four gear electromagnetic clutch 44 energisings and engages, and remaining electromagnetic clutch power-off divides
From, the moment of torsion of transmission input shaft 1 passes to four gear high gears 54 by flywheel inside engaged gear 31, then by the four of joint
Power is transferred to sun gear 91, finally by the engagement of four gear driving gears 64 and four gear driven gears 74 by gear electromagnetic clutch 44
Exported to transmission output shaft 25 by the spline on gear ring 93, it is achieved four gear transmissions.
Reverse gear: ECU 100 controls the electromagnetic clutch 4R energising joint that reverses gear, and remaining electromagnetic clutch power-off divides
From, the moment of torsion of transmission input shaft 1 passes to, by central authorities' external gear pump 32, the high gear 5R that reverses gear, then by falling of engaging
Power is transferred to sun gear 91, finally by the engagement of reverse gear driving gear 6R and the driven gear 7R that reverses gear by gear electromagnetic clutch 4R
Exported to transmission output shaft 25 by the spline on gear ring 93, it is achieved reverse gear.
Neutral: ECU 100 controls gear electromagnetic clutch 41, a two gear electromagnetic clutch 42, three and keeps off electromagnetic clutch
43, four gear electromagnetic clutchs 44, the electromagnetic clutch 4R that reverses gear are in power-off released state, it is achieved neutral.
The pulsewidth modulation of many gears line traffic control automatic transmission of the present invention reverse gear starting control method flow chart as shown in Figure 4,
After electromotor 200 starting ignition, ECU 100 powers on, and the pulsewidth modulations of many gear line traffic control automatic transmission are reversed gear starting control
Method brings into operation, and this control method comprises the following steps:
Step S1, ECU 100 detect R position switch R-SW signal and the GES v of vehicle speed sensor VSS；
Step S2, judge whether to be linked into R gear: when ECU 100 detects that R position switch R-SW signal is connected, it is judged that
It is linked into R gear for line traffic control automatic transmission, carries out step S3；Otherwise, R position switch R-SW signal is detected not when ECU 100
During connection, it is judged that be not linked into R gear for line traffic control automatic transmission, carry out step S1；
Step S3, judge that the GES v of vehicle speed sensor VSS is whether less than starting end of a period vehicle speed value v0: when automatically controlled list
Unit 100 detects that the GES v of vehicle speed sensor VSS is less than starting end of a period vehicle speed value v0Time, carry out step S4；Otherwise, when
ECU 100 detects that the GES v of vehicle speed sensor VSS is more than or equal to starting end of a period vehicle speed value v0Time, starting of reversing gear
Control terminates；
Step S4, starting loop control of reversing gear: ECU 100 controls cycle T according to fixed cycles0=(1+α+β)Tδ, press
Circulation energising pulsewidth function T (v)=(1+ α) Tδ+βTδv/v0Determined by circulation energising pulse-width controlled reverse gear electromagnetic clutch 4R's
Energising pulsewidth, carries out starting loop control of reversing gear, T in formulaδReverse gear required for electromagnetic clutch 4R Separation for eliminating
Little conduction time, α is initial increase pulse width time coefficient, and β is that speed is relevant increases pulse width time coefficient.
After driver turns off ignition switch, ECU 100 power-off, the pulsewidth modulation of many gear line traffic control automatic transmission is reversed gear
Starting control method terminates to run.
In the present embodiment, the initial pulse width time factor alpha that increases is taken as 0.2；The relevant pulse width time factor beta that increases of speed is taken as
0.3；Eliminate the T minimum conduction time reversed gear required for electromagnetic clutch 4R SeparationδIt is taken as 250ms；Starting end of a period speed
Value v0It is taken as 7km/h；Therefore, fixed cycles controls cycle T0=(1+α+β)Tδ=(1+0.2+0.3)×250=375ms；Each
Control energising pulsewidth function T (v)=(1+ α) T of the electromagnetic clutch 4R that reverses gear of circulationδ+βTδv/v0 =(1+0.2)×250+0.3
×250·v/7=300+10.71·v。
The starting control method as it is shown in figure 5, the pulsewidth modulation of the embodiment of the present invention many gears line traffic control automatic transmission is reversed gear
Speed change procedure and reverse gear electromagnetic clutch circulation energising pulse width variations curve synoptic diagram, during first control circulation, speed
It is zero, first energising pulsewidth T (v)=(1+ α) T controlling to circulate the electromagnetic clutch 4R that reverses gearδ+βTδv/v0=(1+0.2)×250
+ 0.3 × 250 × 0/7=300ms, now, energising pulse duty cycle T (the v)/T of the electromagnetic clutch 4R that reverses gear0=300/375=
80%；During second cycle of operation, speed is 0.3km/h, second energising pulsewidth T controlling to circulate the electromagnetic clutch 4R that reverses gear
(v)=(1+α)Tδ+βTδv/v0=(1+0.2) × 250+0.3 × 250 × 0.3/7=303.21ms, now, reverse gear electromagnetic clutch
Energising pulse duty cycle T (v) of 4R/T0=303.21/375=80.86%；By that analogy, reverse gear the energising arteries and veins of electromagnetic clutch 4R
Width is gradually increased, until speed v is equal to starting end of a period vehicle speed value v0Time, energising pulsewidth T (v) of the electromagnetic clutch 4R that i.e. reverses gear=
(1+α)Tδ+βTδv/v0=(1+0.2) × 250+0.3 × 250 × 7/7=375ms, now, the energising arteries and veins of the electromagnetic clutch 4R that reverses gear
Wide dutycycle T (v)/T0=375/375=100%, starting control process of reversing gear terminates.
Above in conjunction with accompanying drawing, embodiments of the present invention are explained in detail, but the present invention is not limited to above-mentioned enforcement
Mode, in the ken that art those of ordinary skill is possessed, it is also possible to without departing from present inventive concept
Under premise, various changes can be made.
Claims (3)
1. the pulsewidth modulation keeping off line traffic control automatic transmission one kind is reversed gear starting control method more, it is achieved this starting control method of reversing gear
The control device of many gears line traffic control automatic transmission include electromotor (200), vehicle speed sensor (VSS), R position switch (R-SW),
ECU (100), the electromagnetic clutch that reverses gear (4R), it is characterised in that described control method comprises the following steps:
Step 1, ECU (100) detection R position switch (R-SW) signal and the GES v of vehicle speed sensor (VSS)；
Step 2, judge whether to be linked into R gear: when ECU (100) detects that R position switch (R-SW) signal is connected, it is judged that for
Line traffic control automatic transmission is linked into R gear, carries out step 3；Otherwise, R position switch (R-SW) signal is detected not when ECU (100)
During connection, it is judged that be not linked into R gear for line traffic control automatic transmission, carry out step 1；
Step 3, judge that the GES v of vehicle speed sensor (VSS) is whether less than starting end of a period vehicle speed value v0: work as ECU
(100) detect that the GES v of vehicle speed sensor (VSS) is less than starting end of a period vehicle speed value v0Time, carry out step 4；Otherwise, when
ECU (100) detects that the GES v of vehicle speed sensor (VSS) is more than or equal to starting end of a period vehicle speed value v0Time, reverse gear
Starting control process terminates；
Step 4, starting loop control of reversing gear: ECU (100) controls cycle T according to fixed cycles0=(1+α+β)Tδ, by following
Ring energising pulsewidth function T (v)=(1+ α) Tδ+βTδv/v0Determined by circulation energising pulse-width controlled reverse gear electromagnetic clutch (4R)
Energising pulsewidth, carries out starting loop control of reversing gear, T in formulaδReverse gear required for electromagnetic clutch (4R) Separation for eliminating
Minimum conduction time, α is initial increase pulse width time coefficient, and β is that speed is relevant increases pulse width time coefficient.
2. the pulsewidth modulations of gear line traffic control automatic transmission much more as claimed in claim 1 are reversed gear starting control method, and its feature exists
In, judge that whether the GES v of vehicle speed sensor (VSS) is less than starting end of a period vehicle speed value v in described step 30In, described
Starting end of a period vehicle speed value v0It is the fixed value set, v0=5～10km/h.
3. the pulsewidth modulations of gear line traffic control automatic transmission much more as claimed in claim 1 are reversed gear starting control method, and its feature exists
In, to reverse gear in starting loop control in described step 4, described initial increase pulse width time factor alpha is the fixed value set,
α=0.1～0.5；Described speed is correlated with increases the fixed value that pulse width time factor beta is setting, β=0.1～0.5.
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| CN201410469239.3A CN104279318B (en) | 2014-09-15 | 2014-09-15 | The pulsewidth modulations of many gear line traffic control automatic transmission are reversed gear starting control method |
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2014
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1112195A (en) * | 1964-07-03 | 1968-05-01 | Bosch Gmbh Robert | Improvements in servo-mechanisms |
| US6857334B2 (en) * | 2000-03-28 | 2005-02-22 | Luk Lamellen-Und Kupplungsbau Beteiligungs Kg | Motor vehicle with automatic transmission |
| CN201255230Y (en) * | 2008-04-08 | 2009-06-10 | 浙江众泰汽车制造有限公司 | Electrohydraulic controlling mechanism of stepless transmission |
| CN102180103A (en) * | 2011-03-30 | 2011-09-14 | 北京理工华创电动车技术有限公司 | Driving system for electric vehicle |
| CN102889375A (en) * | 2012-10-31 | 2013-01-23 | 重庆大学 | Method for controlling gear shifting of two-gear mechanical automatic gearbox of pure electric automobile |
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| Publication number | Publication date |
|---|---|
| CN104279318A (en) | 2015-01-14 |
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