Control unit for motor-assisted bicycle
First Claim
1. A control unit for a motor-assisted vehicle including a manual powered drive system for transmitting a manual drive force to a rear wheel and a motor drive system for transmitting a motor drive force by a motor to said rear wheel, said control unit comprising:
- means for detecting an actual running resistance of a vehicle; and
means for controlling and generating an assist drive force corresponding to the actual running resistance of said motor drive system.
1 Assignment
0 Petitions
Accused Products
Abstract
A control unit for a motor-assisted vehicle such as a bicycle is disclosed that effectively provides an assist drive power to a motor-assisted bicycle during a period of initial pedaling or startup on an upward slope or at the time of acceleration. A first detection signal is outputted when a vehicle speed is equal to or less than a predetermined vehicle speed. A second detection signal is outputted when acceleration is equal to or more than a predetermined value on the basis of a change in the amount of the vehicle speed. A road surface inclination is determined from a map on the basis of a ratio between an actual running resistance and a flat road running resistance. A coefficient K is retrieved form the map corresponding to either the first detection signal or the second detection signal to increase the assist power from the map on the basis of the vehicle speed. The coefficient K is inputted into an assist power calculating portion, and the required assist drive power is calculated.
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Citations
22 Claims
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1. A control unit for a motor-assisted vehicle including a manual powered drive system for transmitting a manual drive force to a rear wheel and a motor drive system for transmitting a motor drive force by a motor to said rear wheel, said control unit comprising:
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means for detecting an actual running resistance of a vehicle; and
means for controlling and generating an assist drive force corresponding to the actual running resistance of said motor drive system. - View Dependent Claims (2, 3, 5, 7, 8, 9, 12)
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4. A control unit for a motor-assisted vehicle including a manual powered drive system for transmitting a manual drive force to a rear wheel and a motor drive system for transmitting a motor drive force by a motor to said rear wheel, said control unit comprising:
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means for detecting an actual running resistance of a vehicle;
means for generating an assist drive force corresponding to the actual running resistance; and
means for calculating and detecting an acceleration of said vehicle;
wherein said means for generating the assist drive power increases the assist drive force generated by said motor drive system in accordance with the acceleration after a predetermined value of time. - View Dependent Claims (6, 10, 11, 13, 15, 16, 17, 18, 19, 20, 21, 22)
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14. A control unit for a motor-assisted vehicle including a manual powered drive system for transmitting a manual drive force to a rear wheel and a motor drive system for transmitting a motor drive force by a motor to said rear wheel, said control unit comprising:
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means for detecting an actual running resistance of a vehicle; and
means for controlling and generating an assist drive force corresponding to the actual running resistance of said motor drive system; and
means for deciding an operational state of said vehicle.
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Specification