Patent ID: 7244215
Filing Date: 2007-07-17
Classification: B60W,B60Y,F16H,Y10S,Y10T

Abstract:
1. A vehicle transmission system, comprising: an engine driven power shift transmission; a clutch module driven by the power shift transmission, the clutch module being mechanically coupled to a manually operable control device and coupled to receive a non-mechanical control signal, the clutch module being manually disengagable to prevent flow of torque therethrough, and the clutch module being controlled by a proportional pressure control valve which is controlled by a direction control lever; a gearbox between the engine and vehicle drive wheels, the gearbox being shiftable when the clutch module is disengaged; and a control unit coupled to the clutch module and to the power shift transmission, the control unit transmitting to the clutch module a control signal which automatically partially disengages the clutch module during shifting of the power shift transmission.