Transmission

US8343006B2 · kind B2 · utility

Assignee

• CHERY AUTOMOBILE CO., LTD. · CN

Inventors

• Jiafeng Yang · Meekrap-oord, CN
• Bill Lakis · Meekrap-oord, CN
• Andrew Nowacki · Meekrap-oord, CN
• Sarah Wykes · Meekrap-oord, CN
• Chris Reis · Meekrap-oord, CN
• John H. Stokes · Lincoln, US
• Frank Bauer · Marpingen, DE
• Jian-Hung Lin · New Taipei, TW

Key dates

• Filing date: Dec 4, 2008
• Grant date: Jan 1, 2013
• Expiry date: May 26, 2029

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2200/2097
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A transmission includes an input shaft (IP), an output shaft (OP), a single planetary gearset (SP), a compound planetary gearset (CP), shifting elements. The single planetary gearset is arranged before the compound planetary gearset, and the shifting elements comprise at least two brakes (B1,B2), the first clutch (C1), the second clutch (C2), the third clutch (C3), and all the shifting elements are positioned between the single planetary gearset and the compound planetary gearset, which has compact arrangements, and can reduce the power transmission length. The transmission also includes an one-way clutch (OWC) acted on the compound planetary gearset. When the transmission shifts to the first speed stage, the first clutch (C1) and the one-way clutch are operated, and the power is transferred from the input shaft to the output shaft via the single planetary gearset and the compound planetary gearset, and when the first speed stage is shifted to the second speed stage, only the first brake (B1) should be operated to engage, thereby it can reduce the frequency of operating the shifting elements and the shifting time in low speed stage.