Cooling system and method for auxiliary brake device of hydrogen fuel cell truck

    公开(公告)号:US11536339B2

    公开(公告)日:2022-12-27

    申请号:US17167023

    申请日:2021-02-03

    发明人: Hyeon Chae Moon

    摘要: A cooling system and method for an auxiliary braking device of a hydrogen fuel cell truck, are provided in consideration that auxiliary braking force generated by the regenerative braking of the motor may be unnecessary and the brake resistor may be unnecessary when a sufficient amount of auxiliary braking force is generated alone by the operation of a retarder. A portion of thermal energy generated by the retarder is distributed to a stack cooling system so that the portion of thermal energy is removed by the stack cooling system. Accordingly, due to sufficient cooling of the retarder, a sufficient amount of auxiliary braking force is provided, and the brake resistor that has consumed surplus electrical energy generated by regenerative braking is removed.

    All wheel drive robotic vehicle with steering brake

    公开(公告)号:US11498205B2

    公开(公告)日:2022-11-15

    申请号:US16317244

    申请日:2017-07-11

    申请人: HUSQVARNA AB

    发明人: Mats Svensson

    摘要: A robotic vehicle (10) comprising a first chassis platform (200) comprising a first wheel assembly (202) and a second chassis platform (210) comprising a second wheel assembly (212). The first and second chassis platforms (200, 210) is arranged to be spaced apart from each other. The robotic vehicle (10) further comprises a linkage (220) operably coupled to the first chassis platform (200) and the second chassis platform (210). The linkage (220) being coupled so as to be fixed relative to the first chassis platform (200) and so that the second chassis platform (210) is rotatable relative to the first chassis platform (200), wherein the second chassis platform (210) comprises a turning axis (400). Said robotic vehicle (10) further comprising an electric brake (262) disposed proximate to a turning shaft (422) of the linkage (220). The electric brake (262) being selectively applied by processing circuitry (110) to resist turning of the second chassis platform (210) about the turning axis (400) and being selectively released to allow the second chassis platform (210) to turn about the turning axis (400).

    CONTROL UNIT FOR AN ELECTRIC VEHICLE WITH AN ELECTROMECHANICAL BRAKE UNIT, VEHICLE THEREWITH AND METHOD OF USE

    公开(公告)号:US20220314811A1

    公开(公告)日:2022-10-06

    申请号:US17435430

    申请日:2020-03-04

    摘要: A control unit (56) for a vehicle (10) with an electric drive (12) and an electromechanically actuated brake unit (14) includes a high-voltage DC link (20) disconnectably connected to a first energy store (24) of the electric drive (12), a converter (18) connected to the high-voltage DC link (20) and operable bidirectionally, and an electric motor (16) connected to the converter (18) for driving a wheel (50) of the vehicle (10). A brake drive circuit (36) is connected to the high-voltage DC link (20), and another electric motor (34), is connected to the brake drive circuit (36). A function block (55) has an input (69) for receiving a voltage signal (68) indicative of the voltage of the high-voltage DC link (20), a first output (63) for outputting a converter drive signal (60), and a first closed-loop controller unit (66) for generating the converter drive signal (60).

    METHOD AND DEVICE FOR BRAKING A TRAIN SET

    公开(公告)号:US20210252984A1

    公开(公告)日:2021-08-19

    申请号:US17052929

    申请日:2019-04-24

    摘要: A method for braking a train set having guiding and guided locomotives interconnected by a time multiplex train bus, includes detecting actual operating current of the guided locomotive, detecting actual operating current of the guiding locomotive, detecting maximum return current, detecting pneumatic braking request of compressed air brake line, determining maximum return current and target braking of the guided locomotive from actual operating current of the guided locomotive, actual operating current of the guiding locomotive, maximum operating current and pneumatic braking request of the brake line, and electrically braking the train set using electrical target braking, while not exceeding maximum return current of the guided locomotive. The maximum current fed back by the guided locomotive is known, and the guided locomotive controlled through the main air line is braked while not exceeding the maximum return current. The braking force is divided by blending among E and pneumatic brakes.

    ALL WHEEL DRIVE ROBOTIC VEHICLE WITH STEERING BRAKE

    公开(公告)号:US20190299398A1

    公开(公告)日:2019-10-03

    申请号:US16317244

    申请日:2017-07-11

    申请人: HUSQVARNA AB

    发明人: Mats Svensson

    摘要: A robotic vehicle (10) comprising a first chassis platform (200) comprising a first wheel assembly (202) and a second chassis platform (210) comprising a second wheel assembly (212). The first and second chassis platforms (200, 210) is arranged to be spaced apart from each other. The robotic vehicle (10) further comprises a linkage (220) operably coupled to the first chassis platform (200) and the second chassis platform (210). The linkage (220) being coupled so as to be fixed relative to the first chassis platform (200) and so that the second chassis platform (210) is rotatable relative to the first chassis platform (200), wherein the second chassis platform (210) comprises a turning axis (400). Said robotic vehicle (10) further comprising an electric brake (262) disposed proximate to a turning shaft (422) of the linkage (220). The electric brake (262) being selectively applied by processing circuitry (110) to resist turning of the second chassis platform (210) about the turning axis (400) and being selectively released to allow the second chassis platform (210) to turn about the turning axis (400).