Title:
ELECTRIC ASSISTANCE SYSTEM AND ELECTRICALLY ASSISTED VEHICLE
Document Type and Number:
WIPO Patent Application WO/2018/123161
Kind Code:
A1
Abstract:
An electric assistance system (51) used in an electrically assisted vehicle (1) provided with a pedal (55), wherein: the electric assistance system (51) is provided with a crankshaft (57) rotated by vehicle occupant input applied to the pedal, a torque sensor (41) that outputs a torque signal corresponding to the magnitude of torque occurring in the crankshaft (57), an electric motor (53) that generates assistance force to assist the vehicle occupant input, an acceleration sensor (38) that outputs an acceleration signal corresponding to the current acceleration pertaining to the travel direction of the electrically assisted vehicle (1), and a control device (70) that receives the torque signal and the acceleration signal and determines the magnitude of the assistance force generated in the electric motor; and the control device (70) calculates a target acceleration from the torque signal on the basis of a rule prepared in advance and determines the magnitude of the assistance force generated in the electric motor (53) so that deviation between the target acceleration and the current acceleration decreases.
Inventors:
HASUMI MITSUHARU (JP)
Application Number:
PCT/JP2017/034147
Publication Date:
July 05, 2018
Filing Date:
September 21, 2017
Export Citation:
Assignee:
YAMAHA MOTOR CO LTD (JP)
International Classes:
B62M6/45
Foreign References:
| JP2016150684A | 2016-08-22 | |||
| JP2004025913A | 2004-01-29 | |||
| US20140081494A1 | 2014-03-20 | |||
| US8874296B2 | 2014-10-28 | |||
| JPH09226664A | 1997-09-02 |
Other References:
See also references of EP 3564111A4
Attorney, Agent or Firm:
OKUDA Seiji (JP)
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