US 11,685,350 B2
Utilization of brakes and transmission system to affect steering of a vehicle and method thereof
Michael York, Carmel, IN (US); and Bruce E. Crum, Brownsburg, IN (US)
Assigned to ALLISON TRANSMISSION, INC., Indianapolis, IN (US)
Filed by ALLISON TRANSMISSION, INC., Indianapolis, IN (US)
Filed on Oct. 13, 2021, as Appl. No. 17/499,928.
Application 16/813,932 is a division of application No. 15/813,593, filed on Nov. 15, 2017, granted, now 10,618,506, issued on Apr. 14, 2020.
Application 17/499,928 is a continuation of application No. 16/813,932, filed on Mar. 10, 2020, granted, now 11,161,489.
Claims priority of provisional application 62/426,790, filed on Nov. 28, 2016.
Prior Publication US 2022/0024458 A1, Jan. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B60T 8/32 (2006.01); B62D 11/00 (2006.01); B62D 11/10 (2006.01); B60T 8/172 (2006.01); B62D 11/08 (2006.01); B60T 8/58 (2006.01); B60T 8/1755 (2006.01)
CPC B60T 8/3215 (2013.01) [B60T 8/172 (2013.01); B60T 8/1755 (2013.01); B60T 8/58 (2013.01); B62D 11/003 (2013.01); B62D 11/08 (2013.01); B62D 11/10 (2013.01); B60T 2260/04 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A transmission system for a vehicle comprising:
a transmission coupled to a first ground engagement mechanism of the vehicle and a second ground engagement mechanism of the vehicle that includes a first output to drive the first ground engagement mechanism and a second output to drive the second ground engagement mechanism;
a first brake actuator coupled to the first output that is controllable to apply brake pressure to the first output;
a second brake actuator coupled to the second output that is controllable to apply brake pressure to the second output;
a first sensor coupled to the first output to detect a first output speed at the first output;
a second sensor coupled to the second output to detect a second output speed at the second output;
a third sensor configured to detect input at a brake input device;
a fourth sensor configured to detect input at a steer input device;
a controller communicatively coupled to the first brake actuator, the second brake actuator, the first sensor, the second sensor, the third sensor, and the fourth sensor;
wherein the controller includes a memory having instructions stored therein and a processor coupled to the memory, and wherein the instructions are executable by the processor to cause the processor to:
detect the first output speed at the first output and the second output speed at the second output;
receive a steer input request from the steer input device;
determine a differential output speed based on the first output speed and the second output speed;
compare the differential output speed to a first threshold and the steer input request to a second threshold; and
control the first brake actuator or the second brake actuator to reduce the first output speed or the second output speed as a function of the steer input request in response to determining that the differential output speed is less than the first threshold and the steer input request is greater than the second threshold.