An automatic transmission for bicycles: a simulation

Chien, Huai-Ching; Tseng, C. H.

doi:10.1016/j.ergon.2003.09.002

Cited by 13 publications

(9 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, a secondary chainring in connected to the pinion at the wheel. The cassette (14) is housed on a grooved sleeve (18) and fixed by a ring nut (8). A chain tensioner (9) is laterally fixed in perfect alignment with the chainring (15) and it allows the exceeding chain (10) to be recovered when working on smaller pinions.…”

Section: First Design (2017)mentioning

confidence: 99%

See 1 more Smart Citation

Design and Construction of a Moving Cassette Electronic Gear-Shift for Human Powered Vehicles

2019

View full text Add to dashboard Cite

In this article, the design and implementation of an electronic bicycle gear-shift with moving cassette is presented. The niche context where the needs developed is explained and the project evolution over two versions is described. Technical aspects considered in the design phase are discussed and detailed explanations of hardware layout and control software logic are given. Performance of the two implemented versions are compared through data recorded during the target competition (pedaling cadence and torque), highlighting the higher reliability of the second design thanks to mechanical simplification and a more stable position feedback. An additional comparison with cadence data from other competitors in a speed-challenge competition is then presented to highlights the main benefit obtained: a reduced variance in cadence that enables the rider to pedal at his optimal rate since the early stage and through the whole run-up. Finally, the current development of the project under a Proof of Concept grant is presented by discussing its potential application on the standard bicycle market, the need for an assessment of its value proposition and the main obstacles to overcome for complying (or not) with the current market standards. The article offers an overview of practical aspects to be considered when designing high-speed human powered vehicle transmissions, including technical details of an innovative solution and critical considerations about the possibility of such a specific design to develop within the standard bicycle market.

show abstract

Section: First Design (2017)mentioning

confidence: 99%

“…However, they never entered the racing market due to the lower and not constant efficiency and/or weight issues [17]. Other studies were developed around automatic shift [13,[18][19][20][21] often with particular focus on e-bikes.…”

Section: Introductionmentioning

confidence: 99%

Design and Construction of a Moving Cassette Electronic Gear-Shift for Human Powered Vehicles

2019

View full text Add to dashboard Cite

show abstract

“…the quality of the interface between rider and bike [7]. Previous studies have concentrated on the racing bicycle and racing speed and/or efficiency [5,6,22]. Some studies have also focused on biomechanical analyses [18,20], physiological response [1,4,8,10,21], and kinematics [13], while cycling.…”

Section: Introductionmentioning

confidence: 98%

A preliminary field study of optimal trunk flexion by subjective discomfort in recreational cyclists

Chen

2012

Journal of the Chinese Institute of Industrial Engineers

View full text Add to dashboard Cite

This study attempts to find the optimal trunk flexion (TF) of a recreational cyclist's subjective discomfort rating while cycling. Two hundred and fifty cyclists were sagittally filmed while cycling on a cycle-way, and their subjective body discomforts were rated. The cyclists also responded to a brief questionnaire. Results show that the TF is positively related to the discomfort on neck/shoulders and is contrary to that on the buttocks. The bike owner cyclists' (n ¼ 144) trunks were more flexed than the bike rental cyclists' (n ¼ 106), with a difference of about 11 . This study also found that the cyclists may subjectively perceive the minimum discomforts of both the buttocks and neck/shoulders regions when the trunk was nearly flexed to 38 . This finding serves as a reference for ergonomic consideration in bike design to avoid extreme discomfort while cycling.

show abstract

“…Few other concepts have been presented in literature, which are yet to be implemented in commercial EPACs. Chien and Tseng (2004) has proposed an automatic gear shifting mechanism for conventional bicycles based on comfortable cadence and torque. Tandon et al (2011) has presented an intelligent transmission system, based on the theory of cadence intervals considering the comfort of the rider, for bicycles with discrete transmission ratios.…”

Section: Power-split Mechanismmentioning

confidence: 99%

An Intelligent Control System for an Electrically Power Assisted Cycle (EPAC)

Dissanayake

Kannangara

Kulasekera

et al. 2018

American Journal of Engineering and Applied Sciences

View full text Add to dashboard Cite

This paper is focused on proposing an enhanced controller for a hybrid drive mechanism in an Electrically Power Assisted Cycle (EPAC) to improve the battery energy utilization while maintaining the rider's physical comfort. A real time data acquisition system was set up on a conventional bicycle using sensors and interfacing modules to verify the operating parameters. A fuzzy logic based novel control algorithm was developed upon the acquired data, to overcome the limitations in proportional assist control aided EPACs. The fuzzy controller was implemented using a novel 'iControl' algorithm. The developed control algorithm was installed on the newly developed EPAC and practically implemented. The developed algorithm showed the capability to improve range via better energy utilization and maintain rider comfort at the same time.

show abstract

An automatic transmission for bicycles: a simulation

Cited by 13 publications

References 9 publications

Design and Construction of a Moving Cassette Electronic Gear-Shift for Human Powered Vehicles

Design and Construction of a Moving Cassette Electronic Gear-Shift for Human Powered Vehicles

A preliminary field study of optimal trunk flexion by subjective discomfort in recreational cyclists

An Intelligent Control System for an Electrically Power Assisted Cycle (EPAC)

Contact Info

Product

Resources

About