• <tr id="yyy80"></tr>
  • <sup id="yyy80"></sup>
  • <tfoot id="yyy80"><noscript id="yyy80"></noscript></tfoot>
  • 99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

    Electro-mechanical power coup ling system for PHEV with high price-performance ratio*

    2014-06-09 14:44:40FedermannFlorianYueCHENGXinLIBoZHANGJiajiaXIEYangYU
    機床與液壓 2014年3期

    Federmann Florian,Yue CHENG?,2,Xin LI,Bo ZHANG,Jia-jia XIE,Yang YU

    1Landshut University of Applied Sciences,Landshut D-84036,Germany;2Key Laboratory of Advanced Manufacturing Technology for Automobile Parts,Ministry of Education,Chongqing University of Technology,Chongqing 400054,China;3School of Vehicle Engineering,Chongqing University of Technology,Chongqing 400054,China

    Electro-mechanical power coup ling system for PHEV with high price-performance ratio*

    Federmann Florian1,Yue CHENG?1,2,Xin LI3,Bo ZHANG3,Jia-jia XIE3,Yang YU3

    1Landshut University of Applied Sciences,Landshut D-84036,Germany;2Key Laboratory of Advanced Manufacturing Technology for Automobile Parts,Ministry of Education,Chongqing University of Technology,Chongqing 400054,China;3School of Vehicle Engineering,Chongqing University of Technology,Chongqing 400054,China

    The price-performance ratio of PHEV determines its market penetration.Besides engine and battery,the power coup ling system including traction motor and automatic transmission is a key influence factor of system performance and costs.This article introduces an electro-mechanical power coup ling system for PHEV with high price-performance ratio,which integrates an electro-mechanical CVT and a flat traction motor.As an example,a PHEV system is configured to conform the vehicle dynamic specifications.

    PHEV,Coupling system,Dynamic specification,CVT

    1.Introduction

    Fuel saving ratio of Plug-in Hybrid Electric Vehicle(PHEV)amounts to 40%,although its advantages over comprehensive energy consumption,CO2emissions and other indicators remain open to question,but in terms of factors such as city air pollution,battery recycling and industrial structure transformation,great importance has been attached to it by the government and industry.At present,the price of PHEV is the biggest barrier affecting the market acceptance[1].

    As core parts of PHEV,electro-mechanical power coupling system including the ISG motor,automatic transmission and its controller has become another bottleneck in addition to the power battery system and hybrid control system(HCU)for the market expansion of PHEV.The difficulty lies in:

    1)Price-performance ratio,one-time purchase cost of PHEV vehicle and comparison between increasing operation and maintenance costs and decreasing fuel costs.All the factors will determinate the appeal for customers.The price and maintenance costs of electro-mechanical power coupling system account for a large proportion in that.

    2)Axial size.PHEV will be widely used in small family cars A with front engined front drive in China,internal combustion engine,ISG motor,and axial size of powertrain consisting of automatic transmission are the bottlenecks for its engineering approaches;

    3)Reliability and maintainability of the system. This article introduces an electro-mechanical power coupling system for PHEV with high price-performance ratio,which integrates an electro-mechanical CVT and also dynamic design for its application in one model is carried out.

    2.Electro-mechanical CVT

    With new transmission structure and technology,automatic transmission,being as the electro-mechanical power coupling system for PHEV,should meet the following requirements:

    1)In order to achieve working conditions of the pure electric,hybrid,charging and energy recovery,two controllable power interruption between engine and drive motor,drive motor and wheel can be realized on power coupling system inside the powertrain.

    2)To support the vehicle solely on electric,especially at the initial stage of the driving.

    3)Lower cost and higher transmission efficiency.

    4)Smaller axial size.

    Among various kinds of advanced automatic transmission,CVT transmission has the following advantages:

    1)Power shift/speed control without coordination of torque/speed on power supply.

    2)Simple shift operation,only axial movement of cone plate.

    3)Smaller axial size.

    In the application of PHEV,the conventional CVT of electro-hydraulic control has the following disadvantages:

    1)Energy consumption.The hydraulic system with CVT of electro-hydraulic control gets low efficiency and high energy loss.Research shows that if electro-hydraulic control system can be replaced by electro-mechanical,the system efficiency will rise by 10%~17%.

    2)Reliability.Reliability and stability of hydraulic system will decrease for the following factors:characteristics of hydraulic oil viscosity-temperature,impurity and pollutant in the hydraulic oil and aging process of hydraulic oil.

    3)High cost.Fluid control element and the processing of related oil structure on the shell will result in the rising cost of CVT.

    4)Hydraulic of hydraulic system is difficult to set under the pure electric working condition of lower speed.

    As improvement for existing CVT of electro-hydraulic control,motor actuators is adopted as speed control system in electro-mechanical CVT(EMCVT),and hydraulic pressure system is replaced by mechanical pressurization system.Performance tests on EM-CVT prototype from China's motor vehicle quality supervision and inspection center shows the average efficiency of the EM-CVT exceeds more than 90%with its peak efficiency of94%,and is suitable for the working condition of pure electric drive[2-5].

    EM-CVT system is divided into several parts:continuously variable transmission unit,speed control unit,speed reducer and differential unit,gear DNR(shift)and clutch.

    Structure of EM-CVT system combines AMT and CVT,among which traditional 11 degrees cone plate is applied in core transmission of CVT including cone plate and steel belt.In this way,mature design theory of CVT can be applied in its basic transmission design[6-13].

    In order to reduce costs and energy consumption,mature products and technologies are applied in clutch and shifting unit,which can also ensure sound working conditions of CVT in pure electric mode.

    3.Structure of electro-mechanical coupling system and the PHEV steady driving mode

    In order to achieve cost-effective system,the author chooses the following design(see Figure 1 and Figure 2)[14-18]:

    1)Electrical-mechanical control CVT(EMCVT)being as the coupling device of system.

    2)Drive motor adopts light-weight(flat)permanent magnet synchronous motor(ISG motor),the structural design of which is collaborative with EM-CVT.

    3)Parallel hybrid system is adopted,in which dry automatic clutch is applied for power interruption between motor and engine(P1),and power interruption between motor and wheel(P2)is achieved through synchronizer that shifts into neutral.

    4)Engine-matched enhanced start motor.According to the system requirements of NVH,the engine is started through speed ratio between drive motor and CVT or through motor initiation.After speed of the engine to amounts to the current motor speed,combination of clutch P1 and engine is achieved.

    Figure 1.Basic structure of system

    Figure 2.Front cabin layout design of powertrain

    By adjusting engine compartment,engine and the layout and size of the motor on small family car from home and abroad,the best axial size should be 230~250 mm,which will not affect the original transmission.

    Here attached various steady driving mode of PHEV in structure design for electro-mechanical coupling system(see Table 1):

    1)Engine drive mode.When SOC of power battery is less than the minimum limit set,the vehicle can be driven by engine solely.

    2)Motor drive mode(solely depending on electricity).When SOC of power battery is within normal range of setting and the output power of motor can meet the demand of PHEV power for driving intention,the vehicle can be driven by motor solely.

    3)Engine/motor hybrid mode.For certain driving intention,the output power of motor can meet the demand of PHEV,i.e.,under the working condition,the power vehicle demands is high and the SOC of battery is within the normal range of setting,then the vehicle can be driven by both engine and motor with superposition of output torque.

    4)Run-charging mode.When SOC of power battery amounts to charging initiated limit set by energy management system and the power engine provides exceeds vehicle’s demand in current working condition,the surplus power of the engine can be used for power battery charging.

    5)Parking-charging mode.When SOC of power battery amounts to charging initiated limit set by energy management system,driver will be prompted to start engine to charge the battery under the condition of stop.

    6)Regenerative braking mode.When SOC of power battery is less than a certain value,the vehicle will shift into regenerative braking mode under conditions of slow or slight brake.The system will maximize the energy recycling by comprehensively coordinating control system of CVT,motor and battery management system(BMS)[13].Requirements of the current condition and NVH of vehicles will determine brake of engine;When the brake force demand of vehicle is large or anti-lock braking system(ABS)is in need,brake will work alone and regenerative braking stop for safety reasons[14].

    Table 1.Various steady driving mode of PHEV(O:combination,X:separation)

    Shifting of above mentioned model is also called transient model,which is not related to system structure.Control strategy will be discussed in other article[19-20].

    4.Dynamic design of vehicle

    The design goal of electro-mechanical power coupling system mentioned in this article is to reduce fuel consumption by more than 40%(according to calculation and test of national standard GBT19753—2005)with sound vehicle power performance for small-family cars,so as to determine optimal matching of engine and drive motor parameters.The requirements for vehicle technical parameters are shown in Table 2.

    Table 2.Performance requirements and parameters of the vehicle

    4.1.Determination of drive motor and engine

    To meet the maximum cruising speed of 100 km/h under pure electric mode,dynamic simulation calculation is made with 90%of the total efficiency for transmission system.Based on the results(see Figure 3),rated power of the drive motor is fixed as 20 kW.Its speed-torque characteristic curve is shown in Figure 4.

    Figure 3.Simulation calculation results of motor rated power and engine power

    Figure 4.Drive motor speed-torque characteristic curve

    According to maximum speed requirements under working conditions of engine/motor hybrid drive,considering the efficiency of motor and transmission system,engine speed-torque characteristics which match the motor should meet the demand shown in Figure 5.At present,the 1.2 L naturally aspirated engine or a 0.8-liter turbocharged engine can meet the demand.

    4.2.Determination of variable speed ratio for transmission

    As per the requirements of highest gradability for PHEV,speed-torque characteristic curve for joint work of engine and motor can be made under hybrid mode,ie,the input characteristic curve of transmission(see Figure 6).According to the curve,maximum variable speed ratio for transmission should amount to 15 for the requirements of gradability.According to the structure parameter of electro-mechanical CVT(EM-CVT),variable speed ratio should be fixed from 2.75 to 16.6.

    Figure 5.Engine characters curve that match the PHEV motor

    Figure 6.Input characteristic curve of transmission on hybrid mode

    4.3.Verification of acceleration performance

    In hybrid mode,acceleration curve of PHEV with above dynamical system is as follows:

    Figure 7.Acceleration curve of PHEV

    From the above figure,0~100 km/h acceleration time of PHEV is 13.8 s,which meets the requirements of accelerating time of 14.3 s[21].

    5.Architecture of transmission control unit(TCU)in coup ling device of electro-mechanical coupling system

    In order to increase the versatility and reliability of TCU in coupling device of electro-mechanical coupling system and reduce costs,frame as shown in Figure 8 is adopted[22]:

    1)Controlling motor drive module of EM-CVT is integrated on the motor,the communication of which with TCU is achieved through CAN field-bus.

    2)Electronic shift lever adopts security mechanism of double bus(CAN+LIN).

    3)Other major subsystems adopt CAN communication.

    4)HCU functions are integrated in TCU hardware.

    Figure 8.TCU frame

    To meet the ISO26262 requirements for safety of communication system function,independent CAN and LIN bus is set up to improve the safety of system function,especially for shift lever controller.

    Since diagnostic function is achieved through LIN bus,in order to read and eliminate the fault code during diagnosis,LIN bus controller adopted in communication should be set as duplex mode.

    Shift lever controller not only calculates gear position,but also integrates other man-machine interface function,such as electronic parking(EPB,E-lectrical Park Brake),ramp start auxiliary and so on.In order to meet future demand,such as autopilot(current market demand:automatic parking,adaptive cruise(ACC),etc.)and other requirements of mode switch on PHEV.Shift lever controller need to acquire other driving request in addition to gear position signals,therefore the communication pattern of CAN should be also set as duplex mode.

    6.Conclusion

    For the increasing demand of energy saving,intelligent and low cost in auto industry,electric actuator is one of the development trends.Electric control of automatic transmission is accord with the requirement for the market development of PHEV.

    Electro-mechanical power coupling system for PHEV with high price-performance ratio integrates drive motor and EM-CVT,which gets low cost and high efficiency and is quite suitable for various working condition and mode switch of PHEV.Its smaller axial size is especially suitable for vehicle of front engined and front drive.

    The coupling system can satisfy the power demand of PHEV at most working conditions.With total power of 8~10 kWh for power battery pack,this system can support a travel range of 50 km under pure electric condition.Above all,electro-mechanical power coupling system with high price-performance ratio can meet the demand of PHEV in terms of power,fuel saving and economic driving.

    [1] ENGLISCH A,F(xiàn)AUST H,HOMM M,et al.Potentials for the Development of Continuously Variable Transmissions[J].ATZ worldwide,2003,7-8:11-14.

    [2] ENGLISCH A,F(xiàn)AUST H,HOMM M,et al.Development of High Performance CVT Components[J].VDIBerichte,2004,1827:649-668.

    [3] WAGNER G,REMMLINGER U,F(xiàn)ISCHERM.CFT30-A Chain Driven CVT for FWD 6 Cylinder Application[J].SAE,2004-01-0648.

    [4] LUTZ N,HEINZ U,PFEIFFER F.Noise Reduction of Chain-CVTs using Optimisation Techniques[J].SAE,2006-01-1309.

    [5] INDLEKOFER N,WAGNER U,F(xiàn)IDLIN A,et al.Latest Results in the CVT Development[C].7th Luk Symposium,2002:63-72.

    [6] WANG Yixing,ZHENG Zhifeng,ZHANG Guangyi. Theory Analysis of Hy-Vo Chain Variable Pitch[J]. Journal of Jilin University of Technology,1983,(1):42 -46.

    [7] MENG Fanzhong,LI Qihai,F(xiàn)ENG Zengming.Meshing Analysis and Design Method of New Hy-Vo Silent Chain and Sprocket[J].Chinese Journal of Mechanical Engineering,2007,43(1):116-119.

    [8] YAN Jingping.The Mechanism Analysis for Uniform Motion of Chain with Varying Pitch[J].Nanjing Institute of Technology,1988,6(2):123-131.

    [9] LUO Shun-zhi,CHENG Yue,LI Xin.Control of Transmission Ratio for Machinery and Electronic Control Metal Belt and Its Simulation[J].Journal of Chongqing University of Technology:Natural Science,2011,8:14 -20.

    [10]CHENG Naishi.Metal V-belt CVT of Auto:Theory and Design of CVT[M].China Machine Press,2008.

    [11]YE Ming,CHENG Yue.Study on Dynamic Control of Continuously Variable Transmission Driven by DC Motor[J].Mechanical Transmission,2011,2:9-12.

    [12]YANG Xinhua,JIANG Qiang,CHENG Yue,et al.A Simulation Study on the Speed Ratio Variation Characteristics of Motor Controlled Metal V-belt CVT[J].Automotive Engineering,2012(4):320-322.

    [13]CHENG Yue,WU Junyi,LIXin.An Improved PID Algorithm for the Speed Ratio Control and Simulation of E-lectro-mechanical Continuously Variable Transmission[J].Hydromechatronics Engineering.2013,41(12):6 -13.

    [14]NOWATSCHIN K,F(xiàn)LEISCHMANN H P,GLEICH T,et al.Multitronic-The New Automatic Transmission from AUDI[J].ATZ worldwide,2000,9:29-31.

    [15]NOWATSCHIN K,F(xiàn)LEISCHMANN H P,F(xiàn)RANZEN P,et al.Multitronic-The New Generation of Automatic Transmission[J].VDI-Berichte,2000,1565:195 -213.

    [16]ROLF P,LINO G,CHRISO.A control-oriented CVT model with nonzero beltmass[J].Journal of Dynamic Systems,Measurement,and Control,2002,124:481-484.

    [17]Howard C.Performance of CVT Transmissions[J]. SAE,1986.

    [18]Micklem D,Longmore K,Burrows R.Belt torque loss in a steel pushing V-belt continuously variable transmission[J].Journal of Automobile Engineering,1994,208(2):91-97.

    [19]YEMing,CHENGYue,SHUHong.Mode Shifting Control of Plug-in Hybrid Electric System Equipped with Mechanic-electric CVT[J].Chinese Journal of Mechanical Engineering,2014(5):585-589.

    [20]LIXin,ZHANG Shi-jing,XU Nan-shao.Characteristic analysis and simulation of a new-type continuously variable transmission carried in EV[J].Journal of Chongqing University of Posts and Telecommunications:Natural Science Edition,2014(2):109-113.

    [21]LIU Xue-mei,HUANGWei,ZHOU Yun-shan.A Study of Parameter Design of Power and Transm ission System for Plug-in Hybrid Electric Vehicle[J].Computer Simulation,2009,10:302-306.

    [22]WU Weili,LAN Fengchong,CHEN Jiqing,et al.Costbenefit Analysis of Parameter Design of Powertrain for Plug-in Hybrid Electric Vehicle[J].Mechanical Science and Technology for Aerospace Engineering:2013,32(3):383-387.

    The Fluid Control Engineering Institute of Kunming University of Science and Technology was set up in 1996.The researches of institute concentrate on electro-hydraulic(pneumatic)servo/proportional control and hydromechatronics.The Institute is committed to research and development of electro-hydraulic control of high-end technical equipment in ferrous metallurgy refining production.Projects undertaken and participated by the copper electrolysis anode preparation equipment,lead residual anode washing production lines as a host device received the second prize of the National Science and Technology Progress Award in 2009,the first prize and the third prize of the Yunnan Provincial Science and Technology Progress Award and many other awards.The institute has developed and put into operation more than a dozen sets of large equipment,and more than 20 national patents,which have been transformed into related products,providing professional package services of technology and equipment for non-ferrous metallurgical enterprises Address:College of Mechanical and Electrical Engineering,Chenggong Campus of Kunming University,727#,Jingming South Road,Chenggong University City,Kunming City,Yunnan Province

    Zip Code:650500

    Contact:Sun Chungeng,13608850651/Liu Sen,13888749366

    Introduction of the Fluid Control Engineering Institute of Kunming University of Science and Technology

    Fig.1 The copper electrolysis anode preparation equipment

    Fig.2 The lead electrolysis washing and rods drawing off equipment

    Fig.3 Electro-hydraulic operation special crane

    Fig.4 The lead residual anode washing equipment

    10.3969/j.issn.1001-3881.2014.18.001

    2014-05-22

    *Project supported by National Natural Science Fund Program“Research of Control for Electro-mechanical CVT PHEV System”(Fund Number:51275549),Natural Science Fund Program of Chongqing Science and Technology Committee(Fund Number:cstc2012jjA60003),and Chongqing Scientific Research Program(Fund Number:cstc2012gg-yyjsB60002)

    ?Yue CHENG,Professor.E-mail:chengyue0049@gmail.com

    亚洲精品日本国产第一区| 国产男人的电影天堂91| 91在线精品国自产拍蜜月| 一本一本综合久久| 听说在线观看完整版免费高清| 一级片'在线观看视频| 午夜福利网站1000一区二区三区| 欧美+日韩+精品| 日本三级黄在线观看| 春色校园在线视频观看| 午夜老司机福利剧场| 国产精品女同一区二区软件| 在线观看美女被高潮喷水网站| 九色成人免费人妻av| 少妇的逼好多水| 亚洲av电影在线观看一区二区三区 | 亚洲在线观看片| 亚洲人成网站在线观看播放| 午夜免费男女啪啪视频观看| 久久精品人妻少妇| 亚洲精品国产av蜜桃| 久久亚洲国产成人精品v| ponron亚洲| 国产成人精品婷婷| 熟女人妻精品中文字幕| 国产又色又爽无遮挡免| 日本与韩国留学比较| 丰满乱子伦码专区| 国产乱来视频区| 赤兔流量卡办理| 国内少妇人妻偷人精品xxx网站| 精品午夜福利在线看| 国产在视频线精品| 国产成人aa在线观看| 精品一区二区三卡| 国产精品综合久久久久久久免费| or卡值多少钱| 蜜桃亚洲精品一区二区三区| 三级经典国产精品| 欧美日韩精品成人综合77777| 欧美一区二区亚洲| 欧美 日韩 精品 国产| 伊人久久精品亚洲午夜| 亚洲怡红院男人天堂| 欧美成人a在线观看| 亚洲av不卡在线观看| 国产伦一二天堂av在线观看| 黄片wwwwww| 免费观看性生交大片5| 亚洲一区高清亚洲精品| 久久亚洲国产成人精品v| 免费高清在线观看视频在线观看| 日韩成人av中文字幕在线观看| 99热这里只有是精品在线观看| 看黄色毛片网站| 久久久亚洲精品成人影院| 国产av不卡久久| 五月天丁香电影| 亚洲在线自拍视频| 亚洲av日韩在线播放| 国产男人的电影天堂91| 国产中年淑女户外野战色| 日韩欧美一区视频在线观看 | 毛片一级片免费看久久久久| 欧美另类一区| 免费大片18禁| 性插视频无遮挡在线免费观看| 春色校园在线视频观看| 国产乱来视频区| 国产在线一区二区三区精| 久久鲁丝午夜福利片| 国产免费一级a男人的天堂| 黄片无遮挡物在线观看| 最近最新中文字幕免费大全7| 有码 亚洲区| 两个人视频免费观看高清| 精品欧美国产一区二区三| 男人狂女人下面高潮的视频| av在线老鸭窝| 看免费成人av毛片| 一个人看的www免费观看视频| 一级黄片播放器| 国产乱来视频区| 国产精品蜜桃在线观看| 中文在线观看免费www的网站| 午夜视频国产福利| 国产成人精品福利久久| 22中文网久久字幕| 99久久精品热视频| 欧美另类一区| 亚洲va在线va天堂va国产| 麻豆av噜噜一区二区三区| 亚洲美女搞黄在线观看| 赤兔流量卡办理| 国产精品.久久久| 22中文网久久字幕| 亚洲18禁久久av| 69人妻影院| 午夜精品国产一区二区电影 | 亚洲,欧美,日韩| 日本午夜av视频| 嫩草影院入口| 啦啦啦韩国在线观看视频| 中文字幕av成人在线电影| 亚洲精品国产成人久久av| 国产精品一二三区在线看| 国产伦在线观看视频一区| 免费观看a级毛片全部| 丝袜美腿在线中文| videos熟女内射| 大话2 男鬼变身卡| a级毛片免费高清观看在线播放| 午夜激情福利司机影院| 精品少妇黑人巨大在线播放| 男女下面进入的视频免费午夜| 在线观看免费高清a一片| 久久久久久久久久久丰满| 白带黄色成豆腐渣| av在线观看视频网站免费| 嫩草影院精品99| 春色校园在线视频观看| 日本一本二区三区精品| 亚洲欧美日韩无卡精品| 国产亚洲av嫩草精品影院| 亚洲丝袜综合中文字幕| 汤姆久久久久久久影院中文字幕 | 欧美潮喷喷水| 五月伊人婷婷丁香| 在现免费观看毛片| 内射极品少妇av片p| 精品国产三级普通话版| 男人和女人高潮做爰伦理| 一级毛片aaaaaa免费看小| freevideosex欧美| 能在线免费看毛片的网站| 成人美女网站在线观看视频| 久久精品人妻少妇| 国产精品久久视频播放| 波多野结衣巨乳人妻| 亚洲自拍偷在线| 男女视频在线观看网站免费| 欧美潮喷喷水| 亚洲欧美成人综合另类久久久| 午夜免费激情av| 九九久久精品国产亚洲av麻豆| 国产精品熟女久久久久浪| 人人妻人人看人人澡| 免费观看a级毛片全部| 成人无遮挡网站| 国产亚洲av片在线观看秒播厂 | 国模一区二区三区四区视频| 国产又色又爽无遮挡免| 亚洲av.av天堂| 国产淫片久久久久久久久| 免费av观看视频| av国产免费在线观看| 欧美xxxx黑人xx丫x性爽| 黄色欧美视频在线观看| 少妇人妻一区二区三区视频| 国模一区二区三区四区视频| 亚洲欧美成人精品一区二区| 黄片wwwwww| 国产亚洲精品久久久com| 国产在线男女| 美女国产视频在线观看| 三级国产精品片| 国产精品1区2区在线观看.| 国产精品人妻久久久影院| 三级国产精品片| 亚洲av二区三区四区| 亚洲av成人av| 九九爱精品视频在线观看| 国产高清不卡午夜福利| 久久精品综合一区二区三区| 亚洲av在线观看美女高潮| 亚洲av日韩在线播放| 18禁在线播放成人免费| 国产 一区 欧美 日韩| 日韩av在线免费看完整版不卡| 一个人免费在线观看电影| 亚洲精品一区蜜桃| 久久久亚洲精品成人影院| 国精品久久久久久国模美| av在线老鸭窝| 日韩伦理黄色片| 毛片女人毛片| 欧美激情久久久久久爽电影| 国产精品一区二区三区四区久久| 亚洲一区高清亚洲精品| 国产精品综合久久久久久久免费| 欧美xxxx黑人xx丫x性爽| 欧美变态另类bdsm刘玥| 亚洲一级一片aⅴ在线观看| 亚洲精品第二区| 国产午夜精品论理片| 亚洲精品视频女| 国产成人a区在线观看| 狠狠精品人妻久久久久久综合| 久久久欧美国产精品| 日韩欧美 国产精品| 日日撸夜夜添| 在线观看免费高清a一片| 亚洲国产成人一精品久久久| 欧美日本视频| 久久久亚洲精品成人影院| 国产亚洲91精品色在线| 一级毛片我不卡| 欧美高清性xxxxhd video| 高清视频免费观看一区二区 | 美女内射精品一级片tv| 青春草国产在线视频| 尾随美女入室| 亚洲av国产av综合av卡| 噜噜噜噜噜久久久久久91| 三级毛片av免费| 精品国内亚洲2022精品成人| 久久久久久九九精品二区国产| 亚洲精品色激情综合| 高清午夜精品一区二区三区| 美女脱内裤让男人舔精品视频| 亚洲国产精品sss在线观看| 天美传媒精品一区二区| 国产精品一二三区在线看| 91狼人影院| 亚洲精品自拍成人| 久久久久久国产a免费观看| 97精品久久久久久久久久精品| 国产激情偷乱视频一区二区| 观看免费一级毛片| a级一级毛片免费在线观看| 汤姆久久久久久久影院中文字幕 | 观看美女的网站| 久热久热在线精品观看| 国产老妇女一区| 亚洲精品乱久久久久久| 日本一二三区视频观看| 一级爰片在线观看| 日韩人妻高清精品专区| 国产黄片视频在线免费观看| 丝袜喷水一区| 国产乱人视频| 观看美女的网站| 精品人妻一区二区三区麻豆| 欧美精品一区二区大全| 国国产精品蜜臀av免费| 女人被狂操c到高潮| 国产成人精品福利久久| 亚洲精品久久久久久婷婷小说| 亚洲怡红院男人天堂| 欧美成人a在线观看| 狠狠精品人妻久久久久久综合| 三级经典国产精品| 99热网站在线观看| 日本欧美国产在线视频| 久久久久久久久久久丰满| 国产探花在线观看一区二区| 在线观看av片永久免费下载| 精品人妻视频免费看| 色综合站精品国产| 成年人午夜在线观看视频 | 一区二区三区高清视频在线| 日韩大片免费观看网站| 亚洲欧美清纯卡通| 日韩视频在线欧美| 国产高潮美女av| 国产国拍精品亚洲av在线观看| 国内精品宾馆在线| 日韩欧美一区视频在线观看 | 亚洲内射少妇av| 精品人妻熟女av久视频| 97超碰精品成人国产| 亚洲熟女精品中文字幕| 久久6这里有精品| 午夜福利成人在线免费观看| 国产一级毛片七仙女欲春2| a级毛片免费高清观看在线播放| 国产精品国产三级国产专区5o| 男女国产视频网站| 国内精品美女久久久久久| 亚洲欧美成人精品一区二区| av播播在线观看一区| 综合色丁香网| av黄色大香蕉| 成人亚洲欧美一区二区av| 亚洲精品色激情综合| a级毛色黄片| 熟妇人妻久久中文字幕3abv| 精品午夜福利在线看| 国产麻豆成人av免费视频| 亚洲经典国产精华液单| 日本猛色少妇xxxxx猛交久久| 色视频www国产| 大陆偷拍与自拍| 狂野欧美激情性xxxx在线观看| 国产一级毛片在线| 亚洲精品aⅴ在线观看| 在线观看美女被高潮喷水网站| 韩国av在线不卡| 熟妇人妻久久中文字幕3abv| 国产男人的电影天堂91| 国产成人aa在线观看| 日韩国内少妇激情av| 国产成人精品婷婷| 亚洲不卡免费看| 久久久午夜欧美精品| 天天躁日日操中文字幕| 免费看不卡的av| 色吧在线观看| 91精品国产九色| 成人毛片a级毛片在线播放| 卡戴珊不雅视频在线播放| 80岁老熟妇乱子伦牲交| 亚洲av.av天堂| 国产精品伦人一区二区| 久久久久久九九精品二区国产| 嫩草影院入口| 搞女人的毛片| 国产视频首页在线观看| 联通29元200g的流量卡| 色吧在线观看| 午夜精品国产一区二区电影 | 搡女人真爽免费视频火全软件| 免费黄色在线免费观看| 精品一区二区三区人妻视频| 欧美日韩国产mv在线观看视频 | 精品人妻一区二区三区麻豆| 国产一区二区在线观看日韩| 天堂俺去俺来也www色官网 | 插阴视频在线观看视频| 国产成人精品福利久久| 亚洲最大成人av| 亚洲人成网站高清观看| 亚洲伊人久久精品综合| 久久精品久久久久久久性| 三级国产精品欧美在线观看| 一级毛片我不卡| 伊人久久精品亚洲午夜| 欧美性猛交╳xxx乱大交人| 亚洲av成人精品一区久久| 最新中文字幕久久久久| 嘟嘟电影网在线观看| 日韩av不卡免费在线播放| 亚洲精品国产av成人精品| 看免费成人av毛片| 免费大片18禁| 国产激情偷乱视频一区二区| 国产精品一区二区三区四区久久| 天堂影院成人在线观看| 国产精品av视频在线免费观看| 久久99热6这里只有精品| 22中文网久久字幕| 国产老妇伦熟女老妇高清| 老司机影院毛片| 最近中文字幕高清免费大全6| 18+在线观看网站| 亚洲av成人av| 亚洲av成人精品一区久久| 99热网站在线观看| 国产久久久一区二区三区| av在线观看视频网站免费| 亚洲人与动物交配视频| 91久久精品电影网| 老司机影院成人| 欧美日韩一区二区视频在线观看视频在线 | 午夜免费男女啪啪视频观看| 国产黄a三级三级三级人| 在线观看人妻少妇| 国产精品久久久久久精品电影| 欧美成人精品欧美一级黄| 婷婷色麻豆天堂久久| 国产老妇伦熟女老妇高清| 肉色欧美久久久久久久蜜桃 | 别揉我奶头 嗯啊视频| 少妇人妻一区二区三区视频| 成年免费大片在线观看| 国产av在哪里看| 能在线免费观看的黄片| 国产女主播在线喷水免费视频网站 | 中国美白少妇内射xxxbb| 日韩av免费高清视频| 真实男女啪啪啪动态图| 我的女老师完整版在线观看| 尤物成人国产欧美一区二区三区| 婷婷六月久久综合丁香| 蜜桃久久精品国产亚洲av| 少妇人妻一区二区三区视频| 嘟嘟电影网在线观看| 国产一区二区三区av在线| 99热6这里只有精品| 中文天堂在线官网| 最近的中文字幕免费完整| 午夜精品一区二区三区免费看| 26uuu在线亚洲综合色| 免费看av在线观看网站| av播播在线观看一区| 国产亚洲一区二区精品| av播播在线观看一区| 韩国高清视频一区二区三区| 国产三级在线视频| 天堂俺去俺来也www色官网 | 国产黄色视频一区二区在线观看| 中文天堂在线官网| 最近的中文字幕免费完整| 日韩人妻高清精品专区| 亚洲成人久久爱视频| 边亲边吃奶的免费视频| 国产精品一区www在线观看| 国产高潮美女av| 在线免费十八禁| 身体一侧抽搐| 麻豆成人午夜福利视频| 91久久精品电影网| 一级黄片播放器| 久久99精品国语久久久| 色视频www国产| 欧美日韩在线观看h| 简卡轻食公司| 午夜福利高清视频| 三级毛片av免费| 日韩av不卡免费在线播放| 午夜激情福利司机影院| 街头女战士在线观看网站| 建设人人有责人人尽责人人享有的 | 麻豆精品久久久久久蜜桃| 男女边摸边吃奶| 欧美xxxx性猛交bbbb| 在线观看av片永久免费下载| 97精品久久久久久久久久精品| 22中文网久久字幕| 麻豆乱淫一区二区| 日韩欧美精品v在线| 超碰97精品在线观看| 国产一区二区三区av在线| 国产v大片淫在线免费观看| 97人妻精品一区二区三区麻豆| 亚洲精品中文字幕在线视频 | 能在线免费观看的黄片| 国产精品国产三级专区第一集| 久久精品国产亚洲网站| 国产 一区精品| 国产v大片淫在线免费观看| 男人舔女人下体高潮全视频| 亚洲天堂国产精品一区在线| 又粗又硬又长又爽又黄的视频| 中文字幕久久专区| 97在线视频观看| 国产又色又爽无遮挡免| 美女xxoo啪啪120秒动态图| 十八禁网站网址无遮挡 | 国产av码专区亚洲av| 久久久久九九精品影院| 国产精品一区二区性色av| 亚洲国产精品成人久久小说| 男女啪啪激烈高潮av片| 建设人人有责人人尽责人人享有的 | 久久久久久久国产电影| 国产永久视频网站| www.色视频.com| 99九九线精品视频在线观看视频| 少妇裸体淫交视频免费看高清| 国产黄色小视频在线观看| 美女cb高潮喷水在线观看| 精品一区二区三卡| 哪个播放器可以免费观看大片| 18禁裸乳无遮挡免费网站照片| 国产日韩欧美在线精品| 日韩成人伦理影院| 搡女人真爽免费视频火全软件| 在线观看免费高清a一片| 亚洲精品国产av成人精品| 国产综合懂色| 91av网一区二区| 成人性生交大片免费视频hd| 国产男女超爽视频在线观看| 校园人妻丝袜中文字幕| 久久这里有精品视频免费| 日韩三级伦理在线观看| 午夜福利成人在线免费观看| 亚洲av国产av综合av卡| 日本欧美国产在线视频| 国产精品.久久久| 免费大片18禁| 免费av观看视频| 又粗又硬又长又爽又黄的视频| videos熟女内射| 在线观看一区二区三区| 久久精品久久久久久久性| 国产黄色免费在线视频| 美女cb高潮喷水在线观看| 精品不卡国产一区二区三区| 观看美女的网站| 欧美激情国产日韩精品一区| 一本久久精品| 91午夜精品亚洲一区二区三区| 久热久热在线精品观看| 色吧在线观看| 久久亚洲国产成人精品v| 久久6这里有精品| 高清午夜精品一区二区三区| 三级毛片av免费| 少妇丰满av| 国产高清三级在线| 18禁在线播放成人免费| 欧美最新免费一区二区三区| 简卡轻食公司| 少妇丰满av| 黄色欧美视频在线观看| 18禁在线播放成人免费| 插逼视频在线观看| 午夜激情欧美在线| 日本wwww免费看| 免费观看精品视频网站| 少妇裸体淫交视频免费看高清| 精品不卡国产一区二区三区| 一级黄片播放器| 日本wwww免费看| 国产伦精品一区二区三区四那| 一个人免费在线观看电影| 在线a可以看的网站| 97精品久久久久久久久久精品| 久久久久精品久久久久真实原创| 黄色欧美视频在线观看| 日本av手机在线免费观看| 精品国产一区二区三区久久久樱花 | 国内精品美女久久久久久| 美女高潮的动态| 99久久中文字幕三级久久日本| 亚洲精华国产精华液的使用体验| 国产精品久久久久久av不卡| 男女啪啪激烈高潮av片| 别揉我奶头 嗯啊视频| 久久精品综合一区二区三区| 欧美激情久久久久久爽电影| 午夜爱爱视频在线播放| 欧美日韩精品成人综合77777| 国产亚洲av片在线观看秒播厂 | 日本一本二区三区精品| 午夜亚洲福利在线播放| 夜夜看夜夜爽夜夜摸| 美女高潮的动态| 亚洲精品乱久久久久久| 熟妇人妻久久中文字幕3abv| 老司机影院成人| 日韩中字成人| 免费观看精品视频网站| 69av精品久久久久久| 两个人的视频大全免费| 欧美 日韩 精品 国产| 天堂√8在线中文| 免费看光身美女| 国内精品宾馆在线| 免费观看a级毛片全部| 大又大粗又爽又黄少妇毛片口| 日本免费a在线| 全区人妻精品视频| 久久99热6这里只有精品| 日韩欧美三级三区| 99re6热这里在线精品视频| 在现免费观看毛片| 少妇被粗大猛烈的视频| 久久精品熟女亚洲av麻豆精品 | 亚洲欧美成人精品一区二区| 亚洲综合精品二区| av播播在线观看一区| 午夜福利成人在线免费观看| 欧美精品国产亚洲| 亚洲在久久综合| 国内精品宾馆在线| 亚洲成人中文字幕在线播放| 国产成人a区在线观看| 偷拍熟女少妇极品色| 免费观看在线日韩| 亚洲一区高清亚洲精品| 一本—道久久a久久精品蜜桃钙片 精品乱码久久久久久99久播 | 内射极品少妇av片p| 2021少妇久久久久久久久久久| 免费观看a级毛片全部| 国产欧美日韩精品一区二区| 日韩av在线大香蕉| 国产黄色免费在线视频| 国产色爽女视频免费观看| 最近中文字幕高清免费大全6| 一区二区三区高清视频在线| 午夜福利成人在线免费观看| 激情五月婷婷亚洲| 国产av码专区亚洲av| 久久草成人影院| 亚洲av成人av| 亚洲经典国产精华液单| 国产精品一二三区在线看| 一本—道久久a久久精品蜜桃钙片 精品乱码久久久久久99久播 | 欧美不卡视频在线免费观看| 熟女人妻精品中文字幕| 国产精品久久久久久精品电影| 欧美+日韩+精品| 精品欧美国产一区二区三| 精华霜和精华液先用哪个| 免费人成在线观看视频色| 亚洲国产精品成人综合色| 2022亚洲国产成人精品| 最近最新中文字幕大全电影3| 久久精品久久精品一区二区三区| 午夜福利网站1000一区二区三区| 久久久久久久国产电影| 乱人视频在线观看| 精品熟女少妇av免费看| 晚上一个人看的免费电影| 激情五月婷婷亚洲| 精品熟女少妇av免费看| 内地一区二区视频在线| 偷拍熟女少妇极品色| 国产精品综合久久久久久久免费| 高清在线视频一区二区三区| 免费大片18禁| 22中文网久久字幕|