A Novel Parallel Hybrid Motorcycle Transmission

Sheu, Kuen Bao; Hsu, Tsung Hua; Hsu, Yuan Yong

doi:10.4028/www.scientific.net/msf.505-507.1021

Cited by 2 publications

(4 citation statements)

References 7 publications

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“…With the aid of BPD, a dual-way manipulated, direct-coupled, and power-split dualpathed system is synthesized. The three features do not exist simultaneously in the 28 studied systems [5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31]. In the two planetary gearsets (PG1 and PG2) of the system, the tooth ratios of the ring gears to the sun gears (rp1 and rp2) are both 0.35.…”

Section: Resultsmentioning

confidence: 99%

“…Since there is no transmission unit parallel to the CVU, the ratio coverage of the system is equivalent to that of the CVU if there is no other transmission unit with a variable ratio. Most of the studied hybrid systems [5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31] have no transmission mechanism parallel to the variator. This means that the power flow from the power source(s) must pass through the CVU.…”

Section: Number Of Power Transmission Paths Parallel To the Cvumentioning

confidence: 99%

“…2021, 11, 2500 2 of 22 manned aerial vehicles. Among the majority of them [5][6][7]9,10,14,19,20,[23][24][25][26][27]31], the second power input is connected to the driveline directly or via clutches. The CVUs of four systems [15,29,30] are connected after the electric variable transmissions (EVTs or e-CVTs) formed by two power inputs connected together via a planetary gearset(s).…”

Section: Introductionmentioning

confidence: 99%

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On the Design of Continuously Variable Transmissions with Bidirectional Bridge Structures for Hybrid Vehicles

Kuo¹,

Liu²

2021

Applied Sciences

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To increase the energy efficiency of road vehicles, an ideal transmission system should have a wide ratio coverage, a high torque capacity, and a high mechanical efficiency. Continuously variable units (CVUs) have been successfully implemented due to the smooth ratio variation, sufficient torque capacity, and ratio coverage. Hence, it will be beneficial to develop a hybrid powertrain comprising a CVU. In this paper, a design method called the “basic path diagram” (BPD) is proposed. It provides a simplified schematic of the system and represents the generic connections among the mechanical components. The system configurations synthesized by the BPD can be sorted according to three characteristics: Direction of power flows through the CVU, coupling pattern of the power inputs, and number of transmission paths parallel to the CVU. The first characteristic determines the number of times the CVU ratio coverage can be exploited, the second characteristic determines whether the torque of the power inputs can be independently controlled, and the third characteristic can help reduce the torque loading of the CVU. With the aid of a BPD, one of the possible system configurations is provided as an example. The result shows that the system can exploit twice the ratio coverage of the CVU and reduce the torque and power transmitted by the CVU in combination with planetary gearsets.

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Section: Resultsmentioning

confidence: 99%

Section: Number Of Power Transmission Paths Parallel To the Cvumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the Design of Continuously Variable Transmissions with Bidirectional Bridge Structures for Hybrid Vehicles

Kuo¹,

Liu²

2021

Applied Sciences

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“…Gerbert [2] and Gerbert and Sorge [3] made a thorough investigation of the mechanics of rubber-V-belt drives. Sheu and co-workers [4][5][6][7] designed an overall drive system of motorcycles which consisted of a CVT. Chen and co-workers [8,9] performed a series of measurements on the power loss of a rubber-V-belt CVT.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on the effect of structural parameters on the governing characteristics of a pulley-drive, continuously variable transmission

Zhu

Liu

Tian

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part D:

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Because of its incomparable advantages over other transmissions especially in some specific conditions, rubber-V-belt, continuously variable transmissions (CVTs) have been extensively applied in low-power vehicles, such as scooters and snowmobiles. The main structural parameters of a CVT evidently affect the driving performance of the vehicle. The effect of one main structural parameter, namely the masses of the flyweights utilized, on the governing characteristics of the CVT is studied, and the mechanism of the effect is explained. First, a mechanical analysis of the drive pulley and the driven pulley of a rubber-belt CVT employed on a snowmobile is conducted. Through the theoretical analysis, the mathematical model of the system running in a steady state is built. Then the principle of parameter optimization, the running resistance of the vehicle, as well as the external characteristics of the gasoline engine applied in the snowmobile are investigated. Finally, experimental research on the structural tuning based on the building of a CVT test rig is carried out. Since it is difficult to change the parameters of some components such as the torque cam and the profile line of the flyweights, the masses of the flyweights are considered as the unique design variables, and different regulating characteristics of the available groups are obtained. Different applications accordingly require corresponding structural design schemes. The experimental results show that the proposed parameter-tuning principle is theoretically correct and practically feasible, which makes it useful for guidance in designing the CVT, as well as the whole driveline.

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A Novel Parallel Hybrid Motorcycle Transmission

Cited by 2 publications

References 7 publications

On the Design of Continuously Variable Transmissions with Bidirectional Bridge Structures for Hybrid Vehicles

On the Design of Continuously Variable Transmissions with Bidirectional Bridge Structures for Hybrid Vehicles

Experimental research on the effect of structural parameters on the governing characteristics of a pulley-drive, continuously variable transmission

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