Honda's 4 Speed All Clutch To Clutch Automatic Transmission 980819
Honda has developed a new lightweight, compact 4 speed automatic transmission (AT) with electronic control for the 1997 Prelude, Acura CL 3.0 and 1998 Accord. The new AT eliminates the 1-2 one-way clutch and 1st gear holding clutch. The two functions of improving shift quality and fail safe at high speed were formerly dependent on conventional one-way clutches. However, new technology has been developed which guarantees these functions using three alternate methods (centrifugal hydraulic cancellation mechanism, direct hydraulic control system and new shift logic hydraulic circuit).
Tatsuyuki Ohashi, Syouji Asatsuke, Hiroshi Moriya, Thomas R. Noble
Honda R&D Co.,LTD.
International Congress & Exposition
Electronic Transmission Controls-PT-79, 1998 Transmission and Driveline Systems Symposium: New Developments and Advanced Concepts in Systems and Components-SP-1324, SAE 1998 Transactions - Journal of Passenger Cars-V107-6