VEHICLE BRAKING
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United States of America Patent
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Issued Date -
Apr 18, 2024
app pub date -
Dec 23, 2023
filing date -
Feb 4, 2022
priority date (Note) -
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Abstract
A vehicle may include rear ground traction members, front ground traction members, a rear drive system to drive the rear ground traction members, a continuously variable speed front drive system to drive the front ground traction members and a controller. The variable speed front drive system may include a hydraulic pump, a hydraulic motor driven by the hydraulic pump and operably coupled to the front ground traction members by a planetary gear assembly. The planetary gear assembly may include a sun gear coupled to and driven by the hydraulic motor, a ring gear operably coupled to the rear ground traction members and a planet carrier carrying planet gears intermeshing between the ring gear and the sun gear. The planet carrier has an output shaft operably coupled to the front ground traction members. At least one sun brake is actuatable by the controller to retard rotation of the sun gear.
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