The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 02, 2013
Filed:
Jul. 07, 2011
Chang Wook Ha, Changnyeong-gun, KR;
Byoung Soo Kwon, Changnyeong-gun, KR;
Sung DO Im, Changnyeong-gun, KR;
Chang Wook Ha, Changnyeong-gun, KR;
Byoung Soo Kwon, Changnyeong-gun, KR;
Sung Do Im, Changnyeong-gun, KR;
Daedong Industrial Co., Ltd., Daegu, KR;
Hankuk Chain Industrial Co., Ltd, Anseong-si, KR;
Abstract
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.