Design and analysis of a novel wheel type continuously variable transmission

Chen, Xinbo; Hang, Peng; Wang, Wei; Yan, Li

doi:10.1016/j.mechmachtheory.2016.08.012

Cited by 22 publications

(12 citation statements)

References 24 publications

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“…Compared to conventional gear arrangements, PGS has many advantages: more options to produce ratios, lighter weight, more practical components, and higher efficiency. Planetary Gear Set (PGS) is a power splitting device for Electrically Continuous Variable Transmission (ECVT) in hybrid vehicles, for example, the Toyota Prius and Ford Escape [13].…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of ECVT on Electric Powered Vehicles for Determining the Speed Ratio

Maulana¹,

Sutantra²

2021

JMES Int. Journal of Mech. Eng. Sc.

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Electronics Continuous Variable Transmission (ECVT) is a smart transmission that has unlimited gear ratios. By analyzing vehicle conditions, ECVT can choose the most efficient gear ratio. ECVT mode requires a Planetary Gear Set (PGS) as a power splitter. This research will use PGS and double electric motor to combine the ECVT mode with electric vehicles to determine the desired speed ratio. The PGS was designed by an analytical model and simulated using CAD software. The simulation will provide several input variations to get the right speed ratio, such as speed variations and rotational direction. The analytical model obtained a PGS ratio of 1:6 with 19 sun gear teeth, 95 ring gear teeth, 38 planet gear teeth, and a motor power of 47 kW. Simulation results will be applied to build the prototype that will be made with a 3D printer. This study shows that ECVT can be a transmission system for electric vehicles with 2 to 5 levels of transmission, and using double electric motors with small power can replace an electric motor with large power. To obtain maximum efficiency, a good control strategy is needed. The control strategy will be discussed in further research.

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Section: Introductionmentioning

confidence: 99%

Design and Analysis of ECVT on Electric Powered Vehicles for Determining the Speed Ratio

Maulana¹,

Sutantra²

2021

JMES Int. Journal of Mech. Eng. Sc.

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“…The transmission mechanism of mechanical CVT mainly includes belt transmission (Toru et al, 1993), chain transmission (Yildiz et al, 2016), and gear transmission (Chen et al, 2017). Nevertheless, belt CVT and chain CVT are the most common CVTs used in vehicles due to their simple structure, small size and light weight (Machida et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Design of Linear Functional Noncircular Gear with High Contact Ratio Used in Continuously Variable Transmission

Ya-nan¹,

Lin²,

He³

et al. 2020

Preprint

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Continuously variable transmission (CVT) of noncircular gears has the technical advantages of large bearing capacity and high transmission efficiency. This paper focuses on the linear functional noncircular gear pair to realize continuously variable transmission. According to the required working section transmission ratio of noncircular gear pair, the transmission ratio function in the non-working section, was constructed by using polynomial, and then the influence of pitch curve parameters in working section on which in non-working section was also analyzed. Furthermore, the pitch curve of the linear functional noncircular gear pair, which are suitable for transmission, were obtained. In order to improve the stability and bearing capacity of gear transmission, the noncircular gear pair transmission with high contact ratio was designed, and an indirect method to verify the contact ratio by detecting the contact length error of tooth profile was proposed. The error was calculated by comparing the actual contact tooth profile length obtained from the rolling experiment with the accurate value of contact tooth profile length based on the principle of gear and the property of involute profile, and the noncircular gear transmission with high contact ratio was verified.

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“…Applying CVT let car to goes in proper speed-torque and engine to operates in fixed point. This functionality lead to optimum performance of engine and fuel economy [6][7][8][9] as make driving easier and more comfortable [10]. Moreover, applications of CVTs to wind power systems and mechanical press machine have been proposed [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…Even toroidal CVTs that are the most promising CVT with high torque capacity of transmissions is just obtained by coupling together in a series scheme [11,20]. Other novel CVT designs could be found in publications, are basically friction based [21].…”

Section: Introductionmentioning

confidence: 99%

Novel continuously variable transmission mechanism

Olyaei

2019

SN Appl. Sci.

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Continues changing of gear ratio is accomplished by continuously variable transmission (CVT) gearboxes that perfectly matches the torque and rotational speed of engine with output conditions. Developing CVTs for better performance and make it more reliable is ongoing effort. Here we present new ratcheting CVT mechanism that is similar to cam based CVT but instead cam it has a free shaft. New CVT is totally mechanical, frictionless and self-adjustable. Its automatic feature makes it cost effective and reliable. Wide gear ratio is achievable easily and simple structure make it more feasible. In opposite to conventional belt-type or toroidal CVTs, this new CVT doesn't use friction force, so its energy transfer efficiency improved and made it durable.

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Design and analysis of a novel wheel type continuously variable transmission

Cited by 22 publications

References 24 publications

Design and Analysis of ECVT on Electric Powered Vehicles for Determining the Speed Ratio

Design and Analysis of ECVT on Electric Powered Vehicles for Determining the Speed Ratio

Design of Linear Functional Noncircular Gear with High Contact Ratio Used in Continuously Variable Transmission

Novel continuously variable transmission mechanism

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