scholarly journals Performance verification test of coaxial centrifugal clutch for motorcycle transmission system

2021 ◽  
Vol 2141 (1) ◽  
pp. 012008
Author(s):  
Zih-Chun Dai
Keyword(s):  
Power Transmission ◽  
Combustion Engine ◽  
Type System ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Unstable State ◽  
Performance Verification ◽  
Variable Transmission ◽  
Output Efficiency ◽  
Dry Clutch

Abstract With the popularization of motorcycles, the demand for motorcycles is getting higher and higher. Therefore, the improvement of power output, the reduction of pollutants discharged, the replacement of waste, the improvement of efficiency and the reduction of fuel use, are also relatively important. Stop-and-go on urban driving will keep the clutch in a state of being engaged and not engaged. The clutch cannot be engaged and is constantly worn. The output efficiency of the CVT belt-type continuously variable transmission system clutch used in the transmission is only about 70~80%. Transmission efficiency. Furthermore, since the traditional CVT belt-type system clutch mainly relies on the action of the centrifugal roller to change the reduction ratio, when encountering different driving conditions and need to accelerate and decelerate, this will make the working area of the internal combustion engine in an unstable state. The matching structure between the automatic clutch weight and the telescopic spring in the reciprocating separation state and the fitted state is replaced, which effectively reduces the problem of uneven contact surfaces of the plates in the past, and prevents the elastic aging from affecting the uniform transmission of power, resulting in the entire dry clutch The life span of the engine is improved and the efficiency of power transmission is maintained, thereby reducing fuel consumption and producing more complete engine power. Therefore, the “Design Performance Verification of Coaxial Contact Centrifugal Ball Clutch” is proposed mainly to verify that the coaxial contact centrifugal ball clutch has better performance than the CVT belt-type clutch.

Design, Simulation, and Implementation of an Electric Hybrid Motorcycle

2010 ◽  
Author(s):  
Behzad Asaei ◽  
Seyed Hosein Seyed mohammadi ◽  
Aghil Yousefi koma ◽  
Mahdi Habibidoost ◽  
Roohollah Aghnoot ◽  
...  
Keyword(s):  
Control Strategy ◽  
High Efficiency ◽  
Power Transmission ◽  
Combustion Engine ◽  
Front Wheel ◽  
Bldc Motor ◽  
Brushless Dc ◽  
Operating Modes ◽  
Proposed Model ◽  
Variable Transmission

This paper presents a general integrated procedure of fabricating a Hybrid Electric Motorcycle (HEM). Firstly, a simple model designed and simulated using ADVISOR2002 and the proposed model is exported to MATLAB/SIMULINK. Secondly, the controller schematic and its optimized control strategy are described. In addition, the ratings of the components including the batteries, electric motor, and internal combustion engine (ICE) are calculated based on the design. A 125 cc ICE motorcycle is selected for conversion to HEM. A brushless DC (BLDC) motor assembled in front wheel as accessory propellant. The nominal powers are 8.2 kW at 8500 rpm and 500 W for the ICE and BLDC respectively. The original motorcycle has a Continues Variable Transmission (CVT) that is the best choice for the HEM power transmission because it can operate in automatic handling mode and has high efficiency. Moreover, by using CVT the ICE can be started while it is running at 15 km/h. Finally, the three operating modes of the HEM, the servo motors, and the LCD panel were explained.

Pulse-Driving Based Magnetic Coupling Resonant Wireless Power Transmission System Research

2011 ◽  
Vol 378-379 ◽  
pp. 539-542
Author(s):  
Qiang Wang ◽  
Hong Li
Keyword(s):  
Optimization Design ◽  
Power Transmission ◽  
Magnetic Coupling ◽  
Transmission Efficiency ◽  
Transmission System ◽  
System Research ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Power Transmission System ◽  
Magnetic Resonances

This paper analyses and designs a kind of pulse-driving based wireless power transmission system via coupled magnetic resonances. It analyzes the influence of the related parameters on the transfer efficiency and transfer power of the system. The experiment tests the proposed wireless power transmission system, and the results show that the above relevant parameters should be comprehensively considered, in order to achieve the optimization design of the transmission efficiency or transmission power. The experiment results also show the validity of the theoretical analysis.

scholarly journals Loader power-split transmission system based on a planetary gear set

2018 ◽  
Vol 10 (1) ◽  
pp. 168781401774773 ◽  
Author(s):  
Chang Lyu ◽  
Zhao Yanqing ◽  
Lyu Meng
Keyword(s):  
Output Power ◽  
Fuel Economy ◽  
Power Transmission ◽  
Planetary Gear ◽  
Torque Converter ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Mechanical Transmission ◽  
Power Split ◽  
Hydraulic Torque Converter

In hydraulic mechanical transmission loaders, a hydraulic torque converter can prevent an engine from stalling due to overloading of the loader during the spading process; however, the hydraulic torque converter also reduces the loader’s fuel economy because of its low transmission efficiency. To address this issue, the study designs an output-power-split transmission system that is applied to a hybrid loader. The designed transmission system removes the hydraulic torque converter in the power transmission system of a traditional loader and adopts a planetary gear set with a compact structure as the dynamic coupling element, thus allowing the output power of the loader to be split transmitted. During shoveling, the loader power-split transmission system based on a planetary gear set can prevent the motor from plugging and over-burning under conditions that ensure that the traction does not decrease. In addition, the transmission efficiency and loader fuel economy are higher in the proposed transmission system than in the power transmission system of a traditional loader. The test results show that the transmission efficiency of the designed system was 13.2% higher than that of the traditional hydraulic mechanical transmission loader.

Three-phase receiving coil of wireless power transmission system for gastrointestinal robot

2017 ◽  
Vol 31 (32) ◽  
pp. 1750277 ◽  
Author(s):  
Z. W. Jia ◽  
T. Jiang ◽  
Y. Liu
Keyword(s):  
Power Transmission ◽  
Asynchronous Motor ◽  
Animal Experiments ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Power Transmission System ◽  
Three Phase

Power shortage is the bottleneck for the wide application of gastrointestinal (GI) robot. Owing to the limited volume and free change of orientation of the receiving set in GI trace, the optimal of receiving set is the key point to promote the transmission efficiency of wireless power transmission system. A new type of receiving set, similar to the winding of three-phase asynchronous motor, is presented and compared with the original three-dimensional orthogonal coil. Considering the given volume and the space utilization ratio, the three-phase and the three-orthogonal ones are the parameters which are optimized and compared. Both the transmission efficiency and stability are analyzed and verified by in vitro experiments. Animal experiments show that the new one could provide at least 420 mW power in volume of [Formula: see text] with a uniformity of 78.3% for the GI robot.

scholarly journals Optimization Transmission Efficiency with Driver Intention for Automotive Continuously Variable Transmission under Slip Mode

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
Ling Han ◽  
Hui Zhang ◽  
Ruoyu Fang ◽  
Hongxiang Liu
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Combustion Engine ◽  
Bottom Layer ◽  
Transmission Efficiency ◽  
Continuously Variable Transmission ◽  
Integrated System ◽  
Engine Torque ◽  
Variable Transmission ◽  
Fuzzy Control Strategy

AbstractThis study proposes and experimentally validates an optimal integrated system to control the automotive continuously variable transmission (CVT) by Model Predictive Control (MPC) to achieve its expected transmission efficiency range. The control system framework consists of top and bottom layers. In the top layer, a driving intention recognition system is designed on the basis of fuzzy control strategy to determine the relationship between the driver intention and CVT target ratio at the corresponding time. In the bottom layer, a new slip state dynamic equation is obtained considering slip characteristics and its related constraints, and a clamping force bench is established. Innovatively, a joint controller based on model predictive control (MPC) is designed taking internal combustion engine torque and slip between the metal belt and pulley as optimization dual targets. A cycle is attained by solving the optimization target to achieve optimum engine torque and the input slip in real-time. Moreover, the new controller provides good robustness. Finally, performance is tested by actual CVT vehicles. Results show that compared with traditional control, the proposed control improves vehicle transmission efficiency by approximately 9.12%–9.35% with high accuracy.

Research on the torsional vibration performance of a CVT powertrain with a dual-mass flywheel damper system

2021 ◽  
pp. 095440702110366
Author(s):  
Zhengfeng Yan ◽  
Dale Yin ◽  
Lei Chen ◽  
Weilei Shen
Keyword(s):  
Optimization Design ◽  
Power Flow ◽  
Power Transmission ◽  
Ride Comfort ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Torsional Stiffness ◽  
Speed Ratio ◽  
Power Transmission System ◽  
Before And After

Continuously variable transmissions (CVTs) can achieve continuous changes in speed ratio and can better improve the ride comfort of the car. However, the torque fluctuation of the engine will reduce its transmission efficiency, and the torsional damper is usually matched to improve transmission efficiency and reduce vibration noise. In this paper, the model of a complete vehicle power transmission system was established by using the bond graph method. The relationships between each state variable were obtained according to the system causality and the direction of the power flow, based on which the dynamic model of the entire vehicle power transmission system was derived. A simulation of the powertrain with dual-mass flywheel-continuously variable transmission (DMF-CVT) was carried out, and the torsional stiffness of the dual-mass flywheel (DMF) was optimized. Taking a certain sport-utility vehicle (SUV) as the test bench, the vehicle road testing of the DMF before and after improvement was carried out, and the test results before and after the improvement were compared to verify the correctness of the optimization direction, which provided a reference for the matching and optimization design of the DMF-CVT power transmission system.

POSSIBILITIES OF DRIVEABILITY AND FUEL CONSUMPTION IMPROVEMENT BY ADVANCED CONTROL POWER TRANSMISSION SYSTEM IN PASSENGER CAR

Transport ◽  
2007 ◽  
Vol 22 (4) ◽  
pp. 247-251 ◽  
Author(s):  
Andrzej Bieniek ◽  
Jerzy Jantos ◽  
Jarosław Mamala
Keyword(s):  
Fuel Consumption ◽  
Power Transmission ◽  
Control Strategies ◽  
Gear Ratio ◽  
Transmission System ◽  
Bench Test ◽  
Control Power ◽  
Power Transmission System ◽  
Variable Transmission ◽  
Ratio Change

The correct work of a power transmission system for the sake of a car motion properties, fuel consumption and pollution emission, requires proper control of an engine and power transmission system. This problem becomes especially significant in the case of automation of the power transmission system and particularly regarding the system of constant gear ratio change between the engine and drive wheels (Continuously Variable Transmission), examined in the paper. This control is based on friction degree conditions estimation between metal belt and the transmission wheels. This paper also describes the experimental results of bench test and road test and applying of different control strategies.

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