CN105890894B - A kind of AMT gearboxes comprehensive performance evaluation method - Google Patents

A kind of AMT gearboxes comprehensive performance evaluation method Download PDF

Info

Publication number
CN105890894B
CN105890894B CN201610220276.XA CN201610220276A CN105890894B CN 105890894 B CN105890894 B CN 105890894B CN 201610220276 A CN201610220276 A CN 201610220276A CN 105890894 B CN105890894 B CN 105890894B
Authority
CN
China
Prior art keywords
msub
mrow
torque
amt
amt gearboxes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201610220276.XA
Other languages
Chinese (zh)
Other versions
CN105890894A (en
Inventor
郑利民
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liaoning University of Technology
Original Assignee
Liaoning University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Liaoning University of Technology filed Critical Liaoning University of Technology
Priority to CN201610220276.XA priority Critical patent/CN105890894B/en
Publication of CN105890894A publication Critical patent/CN105890894A/en
Application granted granted Critical
Publication of CN105890894B publication Critical patent/CN105890894B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/02—Gearings; Transmission mechanisms

Abstract

The present invention discloses a kind of AMT gearboxes comprehensive performance evaluation method, includes the following steps：Step 1：Test platform is built, from left to right sequentially connected power output device, the first torque rotary speed sensor, AMT gearboxes, the second torque rotary speed sensor, torque generator, the 3rd torque rotary speed sensor and load.Step 2: carrying out starting experiment, simulated automotive is in the uphill starting at α angles；Step 3: the first torque T is measured in real time using the first torque rotary speed sensor1With the first rotating speed n1, the 3rd torque T is measured in real time using the 3rd torque rotary speed sensor3With the 3rd rotating speed n3, record test end time t2And Δ t the time required to shifting gears every time1,Δt2,Λ,Δtm, wherein m is gearshift number；Step 4: calculate comprehensive evaluation index.The present invention is proposed by the measurement to the transmission efficiency of AMT gearboxes, shift time and start-up time these three important indicators in a kind of more effective intuitively AMT gearboxes comprehensive performance evaluation method, convenient for analyzing and determining the performance of AMT gearboxes.

Description

A kind of AMT gearboxes comprehensive performance evaluation method
Technical field
The present invention relates to automobile gearbox technical field, more particularly to a kind of AMT gearboxes comprehensive performance evaluation method.
Background technology
Electric control mechanical type automatic speed variator (AMT) is improved on the basis of traditional hand gear type speed changer； It has integrated the mechanical-electrical-hydraulic integration automatic transmission of (manual) the two advantages of AT (automatic) and MT；AMT both has hydraulic automatic The advantages of speed changer fluid drive, but remain the gear-driven AMT transmission efficiencies of former manual transmission it is high, it is at low cost, knot The strong point that structure is simple, easily manufactures.It has integrated the two advantage, is the mechanical-electrical-hydraulic integration fluid drive for being very suitable for China's national situation Device.It is transformed on the mechanical transmission of existing production, is remained most former assembly components, is only changed wherein hand The gear shift bar part of dynamic operating system, production inheritance is good, and the Meteorological of transformation is few, is very easy to be received by manufacturer. Its shortcomings that is nonpower shift, this can be by centainly being made up in terms of automatically controlled software.In several automatic transmission, The cost performance highest of AMT.
AMT transforms traditional manual transmission with advanced electronic technology, not only remain original gear transmission efficiency it is high, The strong point of low cost, and hydraulic automatic speed variator has been also equipped with using all advantages caused by fluid drive.It is with peculiar Economy, conveniently, safety, comfort and receive the welcome of all drivers, become various countries exploitation hot spot.Driver is by adding Speed pedal and control stick transfer control signal to electronic control unit (ECU)；Electronic control unit acquisition engine speed sensing The signals such as device, vehicle speed sensor, moment know the transport condition of vehicle；Electronic control unit (ECU) is pressed according to these signals It is stored in optimum program therein, optimal shift schedule, clutch fuzzy control law, engine oil adaptive updating rule Deng to separation and the combination of engine oil, clutch, the action of shifting of transmission three and sequential realization best match.From And excellent fuel economy and power performance and the ability of gentle start and rapid gear shift are obtained, to reach driver's institute's phase The result of prestige.
The content of the invention
The present invention has designed and developed a kind of AMT gearboxes comprehensive performance evaluation method, by simulating the actual work of AMT gearboxes Make operating mode, more really reflect the comprehensive performance of AMT gearboxes.
Technical solution provided by the invention is：
A kind of AMT gearboxes comprehensive performance evaluation method, includes the following steps：
Step 1: AMT gearboxes are placed in 1 gear, simulated automotive uses the first torque rotary speed to pass in the uphill starting at α angles Sensor measures the first torque T in real time1With the first rotating speed n1, the second torque T is measured in real time using the second torque rotary speed sensor2With Second rotating speed n2, and record automobile and reach starting vehicle velocity V0When time t1；
Step 2: automobile reaches starting vehicle velocity V0When, power output device stops output torque, only connects AMT gearboxes And load；Load output damping, simulated automotive are measured in real time in measurement condition downward driving, and using the first torque rotary speed sensor First torque T1With the first rotating speed n1, the 3rd torque T is measured in real time using the 3rd torque rotary speed sensor3With the 3rd rotating speed n3, note Record test end time t2And Δ t the time required to shifting gears every time1,Δt2,Λ,Δtm, wherein m is gearshift number；
Step 3: calculate the synthesis transmission efficiency η of whole process0：
Calculate average shift time Δ t0：
Step 4: calculate comprehensive evaluation index ψ carries out overall merit to AMT gearboxes：
w1+w2+w3=1
Wherein, w1,w2,w3Respectively comprehensive transmission efficiency η0, average shift time Δ t0It is t with start-up time1For comprehensive Close the weight of evaluation index ψ.
Preferably, the power drive unit uses variable-frequency motor.
Preferably, in step 2, the load is using electromagnetic damper.
Preferably, in step 1, α is 45 °.
Preferably, in step 1, start to walk vehicle velocity V0For 10km/h.
Preferably, in step 2, the measurement condition includes four urban conditions partial circulatings and a suburb operating mode.
Preferably, it is preferred as one kind, in step 4, w1=0.5, w2=0.3, w3=0.2.
The beneficial effects of the invention are as follows：The present invention provides a kind of AMT gearboxes comprehensive performance evaluation method, simulations In automobile often with the process under driving cycle, make test result closer to truth.The present invention passes through to AMT gearboxes The measurement of transmission efficiency, shift time and start-up time these three important indicators is proposed with a kind of more effective intuitively AMT Gearbox comprehensive performance evaluation method, convenient for analyzing and determining the performance of AMT gearboxes.
Description of the drawings
Fig. 1 is AMT gearboxes comprehensive performance test platform structure schematic diagram of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text Word can be implemented according to this.
The present invention provides a kind of AMT gearboxes comprehensive performance evaluation method, including step once：
Step 1：Build test platform.
As shown in Figure 1, test platform includes sequentially connected power output device 110, the first torque rotary speed from left to right Sensor 120, AMT gearboxes 130, the second torque rotary speed sensor 140, torque generator 150, the 3rd torque rotary speed sensor 160 and load 170.
110 simulated automotive engine of power output device is as power resources, as a kind of preferred, power output device 110 use variable-frequency motor, use the AC speed-regulating mode of special variable frequency induction motor and frequency converter, can adapt to different works Busy shift under the conditions of condition can be good at the operating of simulated automotive engine.
First torque rotary speed sensor 120 is arranged between power output device 110 and AMT gearboxes 130, can be measured Go out from power output device 110 and be transferred to torque i.e. the first torque of 130 input terminal of AMT gearboxes and power output device 110 Rotating speed i.e. the first rotating speed.
Torque generator 150 is capable of providing reactive torque, passes through the second torque rotary speed sensor 140 and AMT gearboxes 130 connections.When torque generator 150 is in running order, provide one with AMT gearboxes 130 export torque it is opposite Torque, for simulated automotive uphill starting.
Second torque rotary speed sensor 140 is used to measure torque between AMT gearboxes 130 and torque generator 150 i.e. Rotating speed i.e. the second rotating speed of 130 output terminal of second torque and AMT gearboxes.
The load 170 is connected by the 3rd torque rotary speed sensor 160 with torque generator 150.170 energy of the load Damping force is enough provided with simulated automotive transport condition, preferred as one kind, described use loads 170 electromagnetic dampers.Work as torsion When square generator 150 is in off working state, torque generator 150 only plays connection AMT gearboxes 130 and the work of load 170 With not providing torque.3rd torque rotary speed sensor 160 be used for measure AMT gearboxes 130 and load 170 between torque i.e. 3rd torque and rotating speed i.e. the 3rd rotating speed for loading 170 input terminals.
Test platform further includes controller, control power output device 110, torque generator 150, the work for loading 170 The first torque rotary speed sensor 120 of state and acquisition, the second torque rotary speed sensor 140, the 3rd torque rotary speed sensor 160 measured value.
Step 2: carry out starting experiment.
AMT gearboxes 130 are placed in 1 gear, controller sends control instruction to power output device 110, controls described dynamic The operating of power output device 110 and output torque, while control mode generator 150 provides reactive torque, simulated automotive is at α angles Uphill starting measures the first torque T of t moment using the first torque rotary speed sensor 120 in real time1(t) and the first rotating speed n1(t), The second torque T is measured in real time using the second torque rotary speed sensor2(t) and the second rotating speed n2(t), and record automobile and reach starting Vehicle velocity V0When time t1。
Preferred as one kind, α is 45 °, and start to walk vehicle velocity V0For 10km/h.
Step 3: carry out state of cyclic operation experiment.
When automobile reaches starting vehicle velocity V0When, controller makes torque generator 150 be in off working state, only plays connection AMT gearboxes 130 and the effect of load 170, while using the simulative automobile travel speed of acquisition as feedback signal, control power Output device 110 operates, and simulative automobile travel speed is made to comply fully with the when m- length velocity relation under automobile circulating operating mode.
The automobile circulating operating mode is automobile in the operating mode for carrying out comprehensive oil consumption test and using.One complete cycle operating mode is total to Meter 1180 seconds, is made of, wherein urban conditions 780 seconds, max. speed totally four urban conditions partial circulatings and a suburb operating mode 50km/h；Suburb operating mode 400 seconds, max. speed 120km/h.
The first torque of t moment T is measured in real time using the first torque rotary speed sensor1(t) and the first rotating speed n1(t), using Three torque rotary speed sensors measure the 3rd torque T in real time3(t) and the 3rd rotating speed n3(t), record test end time t2It is and every Δ t the time required to secondary gearshift1,Δt2,Λ,Δtm, wherein m is gearshift number.
Step 4: calculate comprehensive evaluation index.
Transmission efficiency, shift time and the start-up time of AMT gearboxes are the important indicators for weighing AMT gearboxes, therefore Transmission efficiency, shift time and start-up time are calculated.
The real-time transmission efficiency η of starting stage AMT gearbox in step 2 is calculated first1：
Then the real-time transmission efficiency η of AMT gearboxes in calculation procedure three2：
Finally calculate the synthesis transmission efficiency η of whole process0：
Average shift time Δ t is calculated afterwards0：
Start-up time is t1。
Comprehensive transmission efficiency η is obtained again0, average shift time Δ t0It is t with start-up time1Afterwards, overall merit is introduced to refer to It marks ψ and overall merit is carried out to AMT gearboxes：
w1+w2+w3=1
Wherein, w1,w2,w3Respectively comprehensive transmission efficiency η0, average shift time Δ t0It is t with start-up time1For comprehensive Close the weight of evaluation index ψ.
As a kind of preferred, w1=0.5, w2=0.3, w3=0.2.
By the analysis to comprehensive evaluation index ψ, the comprehensive performance of AMT gearboxes is judged.When ψ ∈ [0,0.6), judge The comprehensive performance of AMT gearboxes is poor；When ψ ∈ [0.6,0.8), judge the comprehensive performance of AMT gearboxes to be good；When ψ ∈ [0.8, 1], judge the comprehensive performance of AMT gearboxes to be excellent.
Such as during once testing, measurement obtains the synthesis transmission efficiency η of AMT gearboxes0=0.85, it is average to shift gears Time Δ t0=0.2s, start-up time t1=3s, then comprehensive evaluation index ψ=0.786, it is known that, the synthesis of the AMT gearboxes Performance is good.
Although the embodiments of the present invention have been disclosed as above, but its be not restricted in specification and embodiment it is listed With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, it is of the invention and unlimited In specific details and shown here as the legend with description.

Claims (7)

  1. A kind of 1. AMT gearboxes comprehensive performance evaluation method, which is characterized in that include the following steps：
    Step 1: AMT gearboxes are placed in 1 gear, simulated automotive uses the first torque rotary speed sensor in the uphill starting at α angles Measurement is transferred to the first torque T of AMT transmission inputs from power output device in real time1With the first rotating speed n1, use second turn Square speed probe measures the second torque T between AMT gearboxes and torque generator in real time2With the second rotating speed n2, and record vapour Vehicle reaches starting vehicle velocity V0When time t1；
    Step 2: automobile reaches starting vehicle velocity V0When, power output device stops output torque, only connects AMT gearboxes and bears It carries；Load output damping, simulated automotive is in measurement condition downward driving, and the institute measured in real time using the first torque rotary speed sensor State the first torque T1With the first rotating speed n1, between the AMT gearboxes that are measured in real time using the 3rd torque rotary speed sensor and load 3rd torque T3With the 3rd rotating speed n3, record test end time t2And △ t the time required to shifting gears every time1,△t2,…,△ tm, wherein m is gearshift number；
    Step 3: calculate the synthesis transmission efficiency η of whole process0：
    <mrow> <msub> <mi>&amp;eta;</mi> <mn>0</mn> </msub> <mo>=</mo> <mfrac> <mrow> <msubsup> <mo>&amp;Integral;</mo> <mn>0</mn> <msub> <mi>t</mi> <mn>1</mn> </msub> </msubsup> <mfrac> <mrow> <msub> <mi>n</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mo>&amp;CenterDot;</mo> <msub> <mi>T</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow> <mrow> <msub> <mi>n</mi> <mn>1</mn> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mo>&amp;CenterDot;</mo> <msub> <mi>T</mi> <mn>1</mn> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow> </mfrac> <mi>d</mi> <mi>t</mi> <mo>+</mo> <msubsup> <mo>&amp;Integral;</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <msub> <mi>t</mi> <mn>2</mn> </msub> </msubsup> <mfrac> <mrow> <msub> <mi>n</mi> <mn>3</mn> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mo>&amp;CenterDot;</mo> <msub> <mi>T</mi> <mn>3</mn> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow> <mrow> <msub> <mi>n</mi> <mn>1</mn> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mo>&amp;CenterDot;</mo> <msub> <mi>T</mi> <mn>1</mn> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow> </mfrac> <mi>d</mi> <mi>t</mi> </mrow> <msub> <mi>t</mi> <mn>2</mn> </msub> </mfrac> <mo>;</mo> </mrow>
    Calculate average shift time △ t0：
    <mrow> <msub> <mi>&amp;Delta;t</mi> <mn>0</mn> </msub> <mo>=</mo> <mfrac> <mrow> <msub> <mi>&amp;Delta;t</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>&amp;Delta;t</mi> <mn>2</mn> </msub> <mo>+</mo> <mo>...</mo> <mo>+</mo> <msub> <mi>&amp;Delta;t</mi> <mi>m</mi> </msub> </mrow> <mi>m</mi> </mfrac> <mo>;</mo> </mrow>
    Step 4: calculate comprehensive evaluation index ψ carries out overall merit to AMT gearboxes：
    <mrow> <mi>&amp;psi;</mi> <mo>=</mo> <msub> <mi>w</mi> <mn>1</mn> </msub> <msub> <mi>&amp;eta;</mi> <mn>0</mn> </msub> <mo>+</mo> <msub> <mi>w</mi> <mn>2</mn> </msub> <msup> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <mi>e</mi> </mfrac> <mo>)</mo> </mrow> <mrow> <msub> <mi>&amp;Delta;t</mi> <mn>0</mn> </msub> </mrow> </msup> <mo>+</mo> <msub> <mi>w</mi> <mn>3</mn> </msub> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mn>0.1</mn> <msub> <mi>t</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> </mrow>
    w1+w2+w3=1
    Wherein, w1,w2,w3Respectively comprehensive transmission efficiency η0, average shift time △ t0It is t with start-up time1It is commented for synthesis The weight of valency index ψ.
  2. 2. AMT gearboxes comprehensive performance evaluation method according to claim 1, which is characterized in that the power output dress It puts using variable-frequency motor.
  3. 3. AMT gearboxes comprehensive performance evaluation method according to claim 1, which is characterized in that described negative in step 2 It carries using electromagnetic damper.
  4. 4. AMT gearboxes comprehensive performance evaluation method according to claim 1, which is characterized in that in step 1, α is 45°。
  5. 5. AMT gearboxes comprehensive performance evaluation method according to claim 1, which is characterized in that in step 1, vehicle of starting to walk Fast V0For 10km/h.
  6. 6. AMT gearboxes comprehensive performance evaluation method according to claim 1, which is characterized in that in step 2, the survey Trial work condition includes four urban conditions partial circulatings and a suburb operating mode.
  7. 7. AMT gearboxes comprehensive performance evaluation method according to claim 1, which is characterized in that in step 4, w1= 0.5,w2=0.3, w3=0.2.
CN201610220276.XA 2016-04-07 2016-04-07 A kind of AMT gearboxes comprehensive performance evaluation method Expired - Fee Related CN105890894B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610220276.XA CN105890894B (en) 2016-04-07 2016-04-07 A kind of AMT gearboxes comprehensive performance evaluation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610220276.XA CN105890894B (en) 2016-04-07 2016-04-07 A kind of AMT gearboxes comprehensive performance evaluation method

Publications (2)

Publication Number Publication Date
CN105890894A CN105890894A (en) 2016-08-24
CN105890894B true CN105890894B (en) 2018-06-05

Family

ID=57012930

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610220276.XA Expired - Fee Related CN105890894B (en) 2016-04-07 2016-04-07 A kind of AMT gearboxes comprehensive performance evaluation method

Country Status (1)

Country Link
CN (1) CN105890894B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109029591B (en) * 2018-10-17 2024-02-09 辽宁工业大学 Research and development experimental device and method for electric mini-tiller
CN109377851B (en) * 2018-11-29 2020-09-15 哈尔滨工业大学 Multi-electromechanical-parameter-adjustable content-extensible angular position servo teaching experimental device
CN111289246B (en) * 2018-12-06 2021-04-06 广州汽车集团股份有限公司 Durability test method for parking mechanism of double-clutch automatic transmission
CN109596343A (en) * 2018-12-27 2019-04-09 江铃控股有限公司 Automatic gear-box endurance test method
CN111238806A (en) * 2020-04-27 2020-06-05 北京清航紫荆装备科技有限公司 Testing device for transmission system of cross dual-rotor unmanned helicopter
CN115143277B (en) * 2022-06-17 2024-03-22 中国第一汽车股份有限公司 Gear shifting control method and system for double-clutch transmission, double-clutch transmission and automobile with double-clutch transmission

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100376152B1 (en) * 2000-03-27 2003-03-15 이승종 Simulation method for estimating a performance of automatic transmission automobile
JP4254706B2 (en) * 2004-12-14 2009-04-15 トヨタ自動車株式会社 Transmission test apparatus and test method
CN101118620A (en) * 2007-09-18 2008-02-06 吉林大学 Vehicle gear shifting quality evaluation method based on nerval net
CN102749206B (en) * 2012-07-04 2014-11-26 吉林大学 Vehicle gear-shifting quality evaluation testing method and system
CN103852261B (en) * 2012-12-07 2016-08-17 上汽通用五菱汽车股份有限公司 Car transmissions transmission efficiency method of testing
CN104535320A (en) * 2015-01-15 2015-04-22 吉林大学 Test method for comprehensive transmission efficiency of automotive automatic transmission
CN105372064B (en) * 2015-12-01 2017-12-19 泉州装备制造研究所 Construction machinery gear box assembly performance tests and analyzes test method

Also Published As

Publication number Publication date
CN105890894A (en) 2016-08-24

Similar Documents

Publication Publication Date Title
CN105890894B (en) A kind of AMT gearboxes comprehensive performance evaluation method
CN101140198B (en) Vehicle double clutch type automatic speed transmission hardware in ring emulation test-bed
CN101799363B (en) Vehicle engine electronic control unit testing system and variable resistor combination adjusting method thereof
CN101738320B (en) Hybrid vehicle powertrain test system capable of simulating working condition and inertia
CN101739024B (en) System for integrating half-physical simulation test platform for complete vehicle electronic control device
CN102331346B (en) Low-power consumption hardware-in-loop test bench and test method for vehicular automatic transmission
CN105717805B (en) A kind of exploitation of automatic mechanical type gearbox control and test platform
CN102466568A (en) Hybrid assembly test bed system of passenger vehicle
CN103175685B (en) The driving motor of electric automobile and the integrated test platform of AMT and test method
CN101644624B (en) Steering test bench of electrical-closed tracked vehicle transmission device
CN103528815A (en) Drive axle testing method and system
CN104931275B (en) A kind of function realizing method of the bench test device based on dual-motor drive system
CN102841542A (en) In-loop simulation test bed for hardware of transmission control unit of dry-type dual clutch transmission
CN103196669A (en) Double-clutch automatic gearbox hardware-in-loop dynamic test rack
Lee et al. Improvement in fuel economy for a parallel hybrid electric vehicle by continuously variable transmission ratio control
CN201859062U (en) Experiment workbench system of hybrid power system of passenger cars
CN104535320A (en) Test method for comprehensive transmission efficiency of automotive automatic transmission
CN104284833B (en) Vehicle with electric auxiliary drive especially bicycle
CN202002802U (en) Electric automobile entire operating condition motor system testing device
CN109443614A (en) A kind of the torque converter efficiency test macro and method of automatic transmission
CN104536308B (en) Measurement and control system and method of automatic transmission based on LabVIEW
CN203191204U (en) Electric automobile driving motor and ATM integrated test platform
CN105699094B (en) Hybrid vehicle and its electricity and oil mass conversion method and device
CN104950879B (en) The public control platform of car transmissions
CN108170960A (en) A kind of automatic transmission shift line makes and appraisal procedure

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20180605

Termination date: 20190407

CF01 Termination of patent right due to non-payment of annual fee