Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electric power assisted bicycle

An electric power assist and bicycle technology, applied in the direction of bicycles, electric vehicles, motor vehicles, etc., can solve problems such as prolonging the output time, and achieve the effect of feeling good

Inactive Publication Date: 2013-11-13
SUNSTAR GIKEN KK
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, since the output time is prolonged in proportion to the duration of the pedaling force detected by the pedal detecting unit 4, it may not be possible to provide assisting power accurately corresponding to the current pedal position.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electric power assisted bicycle
  • Electric power assisted bicycle
  • Electric power assisted bicycle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0071] Embodiments of the present invention will be described below with reference to the drawings.

[0072] figure 1 A schematic structure of the electric assist bicycle 1 is shown. As shown in the figure, like a normal bicycle, the main frame portion of the electric power-assisted bicycle 1 is composed of a metal tube frame 3, and a front wheel 20 and a rear wheel 22 are mounted on the frame 3 in a known manner. , handlebar 16 and saddle 18.

[0073] Further, a propeller shaft 4 is rotatably supported at the center lower portion of the vehicle frame 3, and pedals 8L, 8R are attached to the left and right end portions via pedal cranks 6L, 6R, respectively. On this propeller shaft 4, a one-way clutch (described later) is used to transmit only rotation in the R direction corresponding to the forward direction of the vehicle body. image 3 99) sprocket wheel 2 is installed coaxially. A chain 12 rotating endlessly is stretched between the sprocket 2 and the rear wheel power ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

In order to provide an electric assist bicycle capable of performing a smooth electric assist traveling with a good feeling by generating an assist force having high follow-up characteristics even on an uphill road, the following control is carried out. A pedaling force F L , a bicycle speed V, a crank angle ¸, a start angle ¸s, a maximum pedaling force angle ¸m0, and an end angle ¸e0 are detected (step 350). An assist force is calculated from the pedaling force F L and the bicycle speed V (step 352), and a motor control is performed (step 354). A determination is made whether the bicycle is traveling on an uphill road based on the pedaling force F L and the crank angle ¸ during performing an assist action (step 356). During it is determined that the bicycle is traveling on the uphill road, a re-calculation of an uphill assist force and the motor control are carried out on the basis of the pedaling force F L , the bicycle speed V, and the crank angle ¸ when the crank angle reaches a angle for starting applying an uphill assist force (affirmative determination at step 358) (step 360).

Description

technical field [0001] The present invention relates to an electric assist bicycle that can be ridden comfortably and comfortably even on an uphill slope. Background technique [0002] Conventionally, in electric assist bicycles, the assist output from the electric motor is determined by the product of the detected pedaling force and the assist ratio (the ratio of the assist output of the electric motor to the pedaling force) determined from the vehicle speed and the like. [0003] Actually, when the pedals are stepped on, the pedaling force increases from the pedaling start angle, becomes maximum at the maximum pedaling force angle, and becomes substantially zero at the end angle (refer to Figure 8 ). This cycle repeats alternately on the left and right pedals. Therefore, if Figure 17 As shown in 260 and 261 of , the variation of the pedal force contributed by the left and right pedals is sinusoidal. Here, if one of the peaks 260 and 261 of two adjacent pedaling cycles...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B62M23/02B62M6/50
CPCB60L11/1801Y02T10/70B60L15/20B60L2200/12B62M6/50B60L11/007Y02T10/7005B60L50/20B62M6/55Y02T10/64Y02T10/72
Inventor 吉家彰人山口胜浩
Owner SUNSTAR GIKEN KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com