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:
Feb. 18, 2014
Filed:
Sep. 26, 2011
Yi Ren, Guangdong, CN;
Ruru Niu, Guangdong, CN;
Zhengguang Han, Guangdong, CN;
Zhouping Tang, Guangdong, CN;
Wei LI, Guangdong, CN;
Feng KE, Guangdong, CN;
Shenglin Yang, Guangdong, CN;
Shibo Dong, Guangdong, CN;
Yi Ren, Guangdong, CN;
Ruru Niu, Guangdong, CN;
Zhengguang Han, Guangdong, CN;
Zhouping Tang, Guangdong, CN;
Wei Li, Guangdong, CN;
Feng Ke, Guangdong, CN;
Shenglin Yang, Guangdong, CN;
Shibo Dong, Guangdong, CN;
BYD Company Limited, Shenzhen, Guangdong, CN;
Abstract
A drive system of an electric vehicle includes a drive motor, a transmission and a hydraulic system. The transmission has an input shaft, a countershaft, an output shaft, a first transmission unit placed between the countershaft and the output shaft, a first clutch, a second transmission unit placed between the countershaft and the input shaft, and a second clutch. The drive motor is attached to the input shaft, which is attached to the countershaft to provide power of the drive motor to the countershaft; the first clutch is configured for linking or cutting off the power transmission between the countershaft and the first transmission unit; and the second clutch is configured for linking or cutting off the power transmission between the countershaft and the second transmission unit. The first transmission unit has a first transmission ratio greater than a second transmission ratio of the second transmission unit.