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AssigneesDaedong Industrial Co., Ltd., Hankuk Chain Industrial Co., Ltd.
InventorsChang Wook Ha, Byoung Soo Kwon, Sung Do Im
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A load-sensitive automatic transmission system for an agricultural electric vehicle is provided, which includes a drive motor for generating a rotational power using electric power of a battery; a transmission for changing a rotational speed of the drive motor in multiple stages and outputting the changed rotational speed; a forward/reverse differential gear for transmitting the power of the transmission to wheels; a control unit for detecting a running state of the vehicle and a load state of the drive motor and determining a speed change time; and an actuator for operating the transmission in response to a signal from the control unit. Accordingly, it is possible to selectively provide high speed and torque to meet the needs of different situation, beyond the limitations of the motor drive performance of a conventional electric vehicle.
A load-sensitive automatic transmission system for an agricultural electric vehicle, the automatic transmission system comprising:
A load-sensitive automatic transmission system for an agricultural electric vehicle, the automatic transmission system being, configured to determine whether a motor is in a high-load state based on the amount of current detected, before increasing the output power of the motor, if an acceleration means, which is configured to control the vehicle based on a driver's intent, is in an acceleration state, to determine whether a transmission is at a high-speed stage or low-speed stage if the motor is in the high-load state, to determine whether a running speed of the vehicle is higher than a predetermined reference value if the transmission is at the high-speed stage, and to transmit a signal to an actuator to automatically shift the transmission to the low-speed stage if the running speed is lower than the reference value.
A method for controlling a load-sensitive automatic transmission system for an agricultural electric vehicle, the method comprising the steps of:
Dependencies are inferred from the claim text.