US 11,654,900 B2
Vehicle stop transmission control system and method
Kyle K. McKinzie, Oswego, KS (US); Benjamin J. Hertel, S. Coffeyville, OK (US); and Clayton G. Janasek, Coffeyville, KS (US)
Assigned to DEERE & COMPANY, Moline, IL (US)
Filed by Deere & Company, Moline, IL (US)
Filed on Dec. 8, 2020, as Appl. No. 17/115,512.
Prior Publication US 2022/0176946 A1, Jun. 9, 2022
Int. Cl. B60W 30/09 (2012.01); B60T 7/12 (2006.01); B60W 10/18 (2012.01); B60W 10/02 (2006.01)
CPC B60W 30/09 (2013.01) [B60T 7/12 (2013.01); B60W 10/02 (2013.01); B60W 10/18 (2013.01); B60W 2300/152 (2013.01); B60W 2520/10 (2013.01); B60W 2554/804 (2020.02); B60W 2710/022 (2013.01); B60W 2710/027 (2013.01); B60W 2710/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A control system for operating a powertrain of a work vehicle having a power source configured to generate power for an output shaft, the control system comprising:
a transmission positioned operatively between the power source and the output shaft and configured to selectively transfer the power from the power source to drive the output shaft in a first direction according to at least one forward mode and in a second direction according to at least one reverse mode, the transmission including:
at least one forward input clutch configured for engagement when transferring the power in the at least one forward mode,
at least one reverse input clutch configured for engagement when transferring the power in the at least one reverse mode,
a first output clutch configured for engagement when transferring the power in a first mode of the at least one forward mode or the at least one reverse mode, and
a second output clutch configured for engagement when transferring the power in a second mode of the at least one forward mode or the at least one reverse mode; and
a controller, having a processor and memory architecture, configured to:
receive or generate a vehicle stop command;
determine a ground speed of the work vehicle;
compare the ground speed to a first predetermined speed threshold and a second predetermined speed threshold;
generate, when the ground speed exceeds the second predetermined speed threshold, at least one downshift command for the transmission to execute a downshift within the transmission;
generate, when the ground speed is greater than the first predetermined speed threshold and less than or equal to the second predetermined speed threshold, at least one shuttle shift command for the transmission to execute a shuttle shift within the transmission;
determine, when the ground speed is less than or equal to the first predetermined speed threshold, if the transmission is operating in the first mode or the second mode as an operating mode;
select, upon determining the operating mode, a four-square clutch from the first output clutch and the second output clutch, including selecting the second output clutch as the selected four-square clutch when the transmission is operating in the first mode and the first output clutch as the selected four-square clutch when the transmission is operating in the second mode; and
at least partially engage the selected four-square clutch to slow or stop the work vehicle.