US 12,391,233 B2
Agricultural vehicle with a management and command system of a continuously variable transmission group
Simone Tremolada, Treviglio (IT); and Mario Gatti, Treviglio (IT)
Assigned to SAME DEUTZ-FAHR ITALIA S.P.A., Treviglio (IT)
Appl. No. 18/704,768
Filed by SAME DEUTZ-FAHR ITALIA S.P.A., Treviglio (IT)
PCT Filed Nov. 11, 2022, PCT No. PCT/IB2022/060867
§ 371(c)(1), (2) Date Apr. 25, 2024,
PCT Pub. No. WO2023/099993, PCT Pub. Date Jun. 8, 2023.
Claims priority of application No. 102021000030551 (IT), filed on Dec. 2, 2021.
Prior Publication US 2025/0001997 A1, Jan. 2, 2025
Int. Cl. B60W 10/101 (2012.01); F16H 61/66 (2006.01)
CPC B60W 10/101 (2013.01) [B60W 2300/152 (2013.01); B60W 2510/0638 (2013.01); B60W 2510/1005 (2013.01); B60W 2510/1075 (2013.01); B60W 2520/10 (2013.01); B60W 2710/0666 (2013.01); B60W 2710/1005 (2013.01); F16H 2061/6615 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An agricultural vehicle, comprising:
wheel groups;
an engine group adapted to deliver an engine torque at a given number of engine revolutions;
a continuously variable transmission group adapted to connect the engine group to the wheel groups, comprising a hydraulic device operable to modify a gear ratio;
user management means operable by a user to drive the agricultural vehicle and set motion modes thereof;
vehicle management means adapted to detect operating conditions of the agricultural vehicle by detecting a vehicle speed, the engine revolutions, the gear ratio and a hydraulic pressure value of the continuously variable transmission group; and
a management and command system operatively connected to the user management means, the vehicle management means, and the engine group and to the continuously variable transmission group, wherein the management and command system commands the continuously variable transmission group, the management and command system being operatively connected to the hydraulic device, in:
at least one driving operating configuration, in which a hydraulic action of the hydraulic device is commanded according to predetermined steps over time by carrying out a variation of the gear ratio as a function of drive commands performed by the user through the user management means and/or as a function of the vehicle speed; and
at least one auxiliary operating configuration, in which the hydraulic action of the hydraulic device is commanded according to a continuous course over time, by carrying out a variation of the gear ratio as a function of the engine revolutions delivered by the engine group,
wherein the vehicle management means comprise hydraulic detection sensors operatively connected to the hydraulic device and adapted to detect the hydraulic pressure value so that the management and command system checks the hydraulic pressure value with respect to a threshold hydraulic pressure value, and commands the variation of the gear ratio only if the hydraulic pressure value is less than the threshold hydraulic pressure value.