Patent ID: 8057359

Claim:
A twin clutch type speed change control system comprising: a transmission mechanism having a plurality of gear trains for odd-ordinal gear positions and even-ordinal gear positions; and a pair of clutches linked to said odd-ordinal and even-ordinal gear position gear trains, respectively, wherein: said transmission mechanism is capable of power transmission by selectively using one of said plurality of gear trains through a process in which a slide member rotated as one body with a support shaft in each of said plurality of gear trains is mutually non-rotatably engaged with a free gear mutually rotatable in relation to said support shaft; one of said clutches is engaged and the other of said clutches is disengaged during a normal operation with a fixed gear position so as to transmit power by use of one of said plurality of gear trains linked to said engaged clutch and to develop a condition where power transmission can be performed by use of a preliminarily selected one of said plurality of gear trains linked to said disengaged clutch; starting from this condition, said engaged clutch is disengaged and said disengaged clutch is engaged so as to perform changeover between said odd-ordinal gear position and said even-ordinal gear position; at the time of said changeover of said gear position, said formerly disengaged clutch is preliminarily moved by a minute amount toward the clutch engaging side; and at the time of said changeover of said gear position, at the time an oil pressure supplied to said formerly disengaged clutch and an oil pressure supplied to said formerly engaged clutch reach a same level, the oil pressure supplied to said formerly disengaged clutch starts to keep the same level for a period of time.