Motor vehicles – With means responsive to speed of vehicle for maintaining... – Including electrically actuated servomechanism
Patent
1991-03-18
1992-11-10
Culbreth, Eric D.
Motor vehicles
With means responsive to speed of vehicle for maintaining...
Including electrically actuated servomechanism
180 651, 180 658, 180170, 180907, 36442604, B60K 3104
Patent
active
051616343
ABSTRACT:
An electric vehicle that runs at a speed controlled by adjusting power supply to an electric motor in response to a speed setting signal from a speed setting device including an accelerator lever and a change speed lever. This vehicle comprises a first control unit for producing a target speed value based on the speed setting signal, a second control unit for controlling the electric motor, and a rotary encoder for detecting an actual vehicle speed from rotation of the electric motor and feeding the vehicle speed back to the first and second control units. The first control unit compares the target speed value and actual vehicle speed and, when a difference therebetween exceeds a predetermined value, varies the target speed value for application to the second control unit. The second control unit compares the target speed value and actual vehicle speed and determines an amount of power supply to the electric motor.
REFERENCES:
patent: 4415049 (1983-11-01), Wereb
Ichihara Masahiro
Kawabata Gonshiro
Kimura Shigenori
Kuramoto Jiro
Sato Naoaki
Culbreth Eric D.
Kubota Corporation
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