Hydraulic control apparatus for automatic transmission

Details Hydraulic control apparatus for automatic transmission Hydraulic control apparatus for automatic transmission

2006-09-26

2009-10-27

Wright, Dirk (Department: 3655)

Machine element or mechanism

Gearing

Interchangeably locked

Reexamination Certificate

active

07607366

ABSTRACT:
To alleviate shift shock of an automatic transmission provided with a twin clutch. An automatic transmission is provided with gear trains equal in number to the number of speed ratios between a primary shaft and a counter shaft. A first hydraulic clutch and second hydraulic clutch interrupt and connect the transmission of rotation between a crankshaft and the transmission. A changeover valve is provided to connect the pressure of a working fluid to any one of the first and second clutches. A pair of orifice control valves are disposed between the changeover valve and the first clutch and between the changeover valve and the second clutch, respectively. A pair of accumulators are disposed between the changeover valve and the first clutch and between the changeover valve and the second clutch, respectively.

REFERENCES:
patent: 6460425 (2002-10-01), Bowen
patent: 2008/0220936 (2008-09-01), Kobayashi et al.
patent: 2003-139167 (2003-05-01), None

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