Patent ID: 7644638
Filing Date: 2010-01-12
Classification: F16H,Y10T

Abstract:
1. An automatic transmission comprising: an input shaft configured and arranged to receive a rotational drive torque from a drive source; a gear-speed changing mechanism configured to produce a gear ratio and operatively arranged to receive the rotational torque from the drive source; a clutch mechanism arranged coaxially with respect to the input shaft and configured to be hydraulically connected and disconnected to the rotational drive torque from the drive source to the gear-speed changing mechanism; a clutch hydraulic pressure control mechanism configured to control hydraulic pressure of the clutch mechanism; a valve body arranged axially adjacent to the clutch mechanism and enclosing the clutch hydraulic pressure control mechanism; and an oil pump configured and arranged to supply hydraulic pressure to the clutch hydraulic pressure control mechanism, the oil pump being further arranged so as to be offset from the input shaft and to overlap at least one of the clutch mechanism and the valve body when viewed along a direction perpendicular to an axial direction of the input shaft.