Clutchless shifting of a manual transmission

US10315659B2 · kind B2 · utility

Assignee

• Massachusetts Institute of Technology · US

Inventors

• Chad L. Jacoby · Annapolis, US
• Jacob M. Jurewicz · Chicago, US
• Joshua E. Siegel · Austin, US
• Amos G. Winter · Somerville, US
• Young Suk Jo · Cambridge, US
• Patricia Yen · Milpitas, US
• Guillermo Pamanes Castillo · Cambridge, US
• Daniel Scott Dorsch · Cambridge, US

Key dates

• Filing date: Jan 25, 2018
• Grant date: Jun 11, 2019
• Expiry date: Jan 25, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S903/945
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An apparatus for a clutchless manual transmission includes a transmission, a drive shaft, and a motor shaft. The transmission includes an input shaft, an output shaft, and an intermediate gear. The input shaft is coupled to an engine shaft to receive power and the output shaft is coupled to the drive shaft to transmit power to a wheel of a vehicle. The input shaft and output shaft are coupled by a plurality of input and output shaft gears. A first synchronizer is coupled to the output shaft to selectively engage a particular output shaft gear, adjusting the speed of the output shaft relative to the input shaft. The motor shaft receives power from a motor and includes a second synchronizer to selectively engage the engine shaft to the drive shaft via the motor shaft. The apparatus can be used to reduce acceleration and turbo lag in hybrid and high-performance vehicles.