Back to results
US 7,244,215 B2Granted
Transmission control system and method
AssigneeDeere & Company
InventorsMarco Reinards, Nicolai Tarasinski
Life of this patent
Estimating the term…
Abstract
A vehicle transmission transmits torque from an engine to a drive axle and includes a power shift transmission and a reverser module. A control system and method automatically partially disengages the reverser module during a shift of the power shift transmission with nearly no effect upon the operating condition of the engine, so that a portion of the torque generated by the engine continues to be transmitted at all times to the drive axle.
Claims6
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.
2 more elements
Dependencies are inferred from the claim text.