A number of illustrative variations may include a system and method of controlling vehicle slowing while implementing brake-to-steer functionality that may include providing a feed-forward gain on vehicle propulsion torque to achieve or maintain target longitudinal acceleration and replicate the behavior of a vehicle not using brake-to-steer. The system may manipulate propulsion of the vehicle to manage longitudinal acceleration disturbance and speed disturbance during brake-to-steer.

A number of illustrative variations may include a system that may manage torque overlay scenarios in a vehicle where the brakes and propulsion system are providing both lateral and longitudinal movement commands and there is a change in longitudinal acceleration requested from a driver or autonomous driving system. The system may manage driver brake inputs and brake-to-steer brake inputs to maintain brake-to-steer functionality while also applying sufficient braking as requested by the driver.

A number of illustrative variations may include a system that may manage torque overlay scenarios in a vehicle where the brakes and propulsion system are providing both lateral and longitudinal movement commands and there is a change in longitudinal acceleration requested from a driver or autonomous driving system. The system may manage driver brake inputs and brake-to-steer brake inputs to maintain brake-to-steer functionality while also applying sufficient braking as requested by the driver.

A steering method for an autonomously steered vehicle having a hybrid steering system, including: identifying a malfunction during an autonomous driving procedure, wherein the hybrid steering system includes a hydraulic steering assistance system, an electromechanical steering assistance system and a control unit for monitoring and controlling the autonomous driving procedure of the vehicle, and switching the steering task by the control unit to a steering braking procedure, by which the vehicle is steered by braking at least one wheel, wherein due to the braking force that is acting on the scrub radius, a steering torque is produced that causes the wheels to turn. Also described is a related a servo-assisted steering assembly.

The bulldozer has a right first oil channel, a right second oil channel, and a right third oil channel. The right first oil channel guides a portion of the lubricating oil discharged by a hydraulic pump to a right steering brake. The right second first oil channel guides a portion of the lubricating oil discharged by the hydraulic pump to a right planetary gear mechanism. The right third oil channel guides at least a portion of the lubricating oil that has passed through the right planetary gear mechanism to a right steering brake. At least a portion of the planetary gear mechanism is disposed further inside than the right steering brake in a radial direction perpendicular to the center axis of an input shaft.

The bulldozer has a right first oil channel, a right second oil channel, and a right third oil channel. The right first oil channel guides a portion of the lubricating oil discharged by a hydraulic pump to a right steering brake. The right second first oil channel guides a portion of the lubricating oil discharged by the hydraulic pump to a right planetary gear mechanism. The right third oil channel guides at least a portion of the lubricating oil that has passed through the right planetary gear mechanism to a right steering brake. At least a portion of the planetary gear mechanism is disposed further inside than the right steering brake in a radial direction perpendicular to the center axis of an input shaft.

A method of controlling a vehicle during a braking operation includes providing a first and a second brake actuator, a brake input device, a steer input device, and a cross-drive transmission having two outputs and a controller. The method includes detecting a first output speed at the first output and a second output speed at the second output, and receiving a brake input request and a steer input request. The method also includes determining a differential output speed based on the first output speed and the second output speed, and comparing the differential output speed to a first threshold, the brake input request to a second threshold, and the steer input request to a third threshold. The method includes determining the first or the second output is locked during the braking operation, and controlling the first or the second brake actuator based on which output is determined to be locked.

A method of controlling a vehicle during a braking operation includes providing a first and a second brake actuator, a brake input device, a steer input device, and a cross-drive transmission having two outputs and a controller. The method includes detecting a first output speed at the first output and a second output speed at the second output, and receiving a brake input request and a steer input request. The method also includes determining a differential output speed based on the first output speed and the second output speed, and comparing the differential output speed to a first threshold, the brake input request to a second threshold, and the steer input request to a third threshold. The method includes determining the first or the second output is locked during the braking operation, and controlling the first or the second brake actuator based on which output is determined to be locked.

A bulldozer has a left planetary gear mechanism, a left steering clutch, and a first clutch gear. The left planetary gear mechanism is disposed between an input shaft and a left output shaft. The left steering clutch switches between transmitting and blocking a rotational force from the input shaft to the left output shaft by the left planetary gear mechanism. The first clutch gear is attached to the left steering clutch. The left steering clutch can is configured to be engaged or disengaged with a left sun gear. The first clutch gear is fixed in an unrotatable manner.

A bulldozer has a left planetary gear mechanism, a left steering clutch, and a first clutch gear. The left planetary gear mechanism is disposed between an input shaft and a left output shaft. The left steering clutch switches between transmitting and blocking a rotational force from the input shaft to the left output shaft by the left planetary gear mechanism. The first clutch gear is attached to the left steering clutch. The left steering clutch can is configured to be engaged or disengaged with a left sun gear. The first clutch gear is fixed in an unrotatable manner.