Synchromesh transmission suited for use as automotive automatic transmission

Patent · Tue Apr 21 04:00:00 EDT 1987

OSTI ID:6635128

Hiraiwa, K

A transmission is described comprising: an input shaft operatively connected with a source of rotational energy; a first intermediate shaft arranged to be coaxial with the input shaft; a first clutch for selectively providing a drive connection between the input shaft and the first intermediate shaft; a second intermediate shaft arranged to be coaxial with the input shaft; a second clutch for selectively providing a drive connection between the input shaft and the second intermediate shaft; a countershaft arranged to be parallel with the input shaft; a first group of intermeshing input and output gears arranged between the first intermediate shaft and the countershaft to provide a first predetermined speed change ratio; a second group of intermeshing input and output gears arranged between the second intermediate shaft and the countershaft to provide a second predetermined speed change ratio; output means for connection with the countershaft to transmit power from the countershaft to an external drive means; a primary means which comprises a first input gear rotatably disposed about the first intermediate shaft, a first synchronizer-clutch arranged between the first input gear and the first intermediate shaft to selectively connect and disconnect the first input gear and the first intermediate shaft and a first output gear secured to the countershaft and constantly meshed with the first input gear to rotate therewith; a secondary means which comprises a second input gear rotatably disposed about the second intermediate shaft, a second synchronizer-clutch arranged between the second input gear and the intermediate shaft to selectively connect and disconnect the second input gear and the second intermediate shaft and a second output gear secured to the countershaft and constantly meshed with the second input gear to rotate therewith.

• Assignee: Nissan Motor Co., Ltd., Yokohama
• Patent Number(s): US 4658663
• OSTI ID: 6635128
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
DESIGN
GEARS
MACHINE PARTS
MECHANICAL TRANSMISSIONS
MOTION
OPERATION
ROTATION
SHAFTS
SYNCHRONIZATION
VEHICLES
VELOCITY