System and method for activating a secondary axle

    公开(公告)号:US11305748B2

    公开(公告)日:2022-04-19

    申请号:US16698006

    申请日:2019-11-27

    Abstract: A vehicle includes a primary axle powered by an actuator and a secondary axle powered by a motor. The secondary axle includes a differential, first and second halfshafts, first and second wheels, a first electric clutch selectively coupling the first wheel to the first halfshaft, and a second electric clutch selectively coupling the second wheel to the second halfshaft. A vehicle controller is programmed to: responsive to a request to activate the secondary axle and a first speed difference between the first and second wheels being less than a first threshold, engage the first and second clutches at a same time, and, in response to the request to activate the secondary axle and the first speed difference between the first and second wheels exceeding the first threshold, engage one of the clutches and then subsequently engage the other of the clutches once the one of the clutches is fully engaged.

    System and method for vehicle turning radius reduction

    公开(公告)号:US12145573B2

    公开(公告)日:2024-11-19

    申请号:US17145737

    申请日:2021-01-11

    Abstract: A vehicle control system for reducing turn radius of a vehicle may include a controller and a torque control module operably coupled to the controller and to front wheels of a front axle of the vehicle and rear wheels of a rear axle of the vehicle. The controller may also be operably coupled to components and/or sensors of the vehicle to receive information including vehicle wheel speed and steering wheel angle. The torque control module may be operable, responsive to control by the controller, to apply a negative torque to an inside rear wheel during a turn and apply a positive torque to the front axle during the turn to compensate for the negative torque applied to the inside rear wheel to reduce the turn radius based on the steering wheel angle and the vehicle speed.

    SYSTEM AND METHOD FOR ACTIVATING A SECONDARY AXLE

    公开(公告)号:US20210155219A1

    公开(公告)日:2021-05-27

    申请号:US16698006

    申请日:2019-11-27

    Abstract: A vehicle includes a primary axle powered by an actuator and a secondary axle powered by a motor. The secondary axle includes a differential, first and second halfshafs, first and second wheels, a first electric clutch selectively coupling the first wheel to the first halfshaft, and a second electric clutch selectively coupling the second wheel to the second halfshaft. A vehicle controller is programmed to: responsive to a request to activate the secondary axle and a first speed difference between the first and second wheels being less than a first threshold, engage the first and second clutches at a same time, and, in response to the request to activate the secondary axle and the first speed difference between the first and second wheels exceeding the first threshold, engage one of the clutches and then subsequently engage the other of the clutches once the one of the clutches is fully engaged.

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