Guangzhou Sunmile Dynamic Technologies Corp., Ltd

Fuhai Duan

Jun Chen

Yu Long Wang

Yu Wang

A four-speed transaxle for an electric vehicle comprises four planetary gear sets that is operatively connected to an electric motor, four electric caliper brake systems and one stage gears. The four-speed transaxle produces its first speed ratio when a first and third electric caliper brake systems are disengaged and a second and fourth electric caliper brake systems are engaged. Second speed ratio results when the first and fourth electric caliper brake systems are engaged and the second and third electric caliper brake systems are disengaged. Third speed ratio results when the second and third electric caliper brake systems are engaged and the first and fourth electric caliper brake systems are disengaged. Fourth speed ratio is produced when the first and third electric caliper brake systems are engaged and the second and fourth electric caliper brake systems are disengaged.

Four-speed transaxle for electric vehicle

A hybrid transmission device includes six planetary gear sets mechanically-operatively connected to an internal combustion engine and two motor/generators adapted to selectively transmit mechanical power to an output member through selective application of eight caliper brake systems. Each planetary gear set has a sun gear and a ring gear, each of which meshingly engage a plurality of planet gears. The first and second motor/generators are coaxially aligned with each other as well as six planetary gear sets. The sun gear in the first planetary gear set is connected to the first motor/generator. The sun gear in the second planetary gear set is connected to the second motor/generator. Various driving modes are provided by changing the states of the caliper brake systems and the operating modes of the engine and the first and second motor/generators.

Hybrid transmission device

A two-speed transaxle for an electric vehicle has an input shaft receiving power from an electric motor, and two output shafts delivering power to drive the vehicle. At least one epicyclic gear set is used. Each epicylic gear set has only an outer gear member, each of which meshingly engage a plurality of planet gears supported on a common carrier. The two-speed transaxle produces its first forward speed ratio when a first caliper brake system and a second caliper brake system are disengaged and a one-way clutch connects the first sun gear to the transaxle casing. Second forward speed ratio results when the second hydraulic brake is engaged to fix the second sun gear. Reverse drive and regenerative operation result when the first hydraulic brake fixes the first sun gear and the direction of power flow is reversed.

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Fujian, China

Fuhai Duan