US 12,325,394 B2
Parking brake control method for electromechanical brake system of urban rail vehicle
Rui Shi, Nanjing (CN); Yifan Liang, Nanjing (CN); Meng Shi, Nanjing (CN); Xiaowei Chen, Nanjing (CN); Shenyue Huang, Nanjing (CN); and Nan Wang, Nanjing (CN)
Assigned to CRRC Nanjing Puzhen Co., Ltd., Nanjing (CN)
Appl. No. 18/559,839
Filed by CRRC Nanjing Puzhen Co., Ltd., Nanjing (CN)
PCT Filed Sep. 6, 2022, PCT No. PCT/CN2022/117158
§ 371(c)(1), (2) Date Nov. 9, 2023,
PCT Pub. No. WO2023/051184, PCT Pub. Date Apr. 6, 2023.
Claims priority of application No. 202111153090.4 (CN), filed on Sep. 29, 2021.
Prior Publication US 2024/0246521 A1, Jul. 25, 2024
Int. Cl. B60T 13/74 (2006.01); B60T 13/66 (2006.01); B60T 17/22 (2006.01)
CPC B60T 13/741 (2013.01) [B60T 13/665 (2013.01); B60T 17/228 (2013.01); B60T 2270/402 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A parking brake control method for an electromechanical brake system of an urban rail vehicle, comprising: arranging an operation instruction mechanism, a brake control mechanism, an electromechanical actuating mechanism and an auxiliary mechanism; wherein the operation instruction mechanism-outputs a control signal to the brake control mechanism to drive an action of the electromechanical actuating mechanism so as to achieve braking application and relief of the urban rail vehicle; and the auxiliary mechanism is used for a redundant power supply system of a brake system;
the control method further comprises the following steps:
S1, signal judgment of the brake control mechanism: issuing an operation command by the operation instruction mechanism in the urban rail vehicle, outputting a power gain and power loss signal of parking application of a train line, a power gain and power loss signal of parking relief of the train line and a power gain and power loss signal of a zero-speed train line, wherein these three control signals are input to the brake control mechanism; outputting a control power source and a control signal to the electromechanical actuating mechanism by logical judgment of the brake control mechanism;
S2, brake application of the parked train: energizing the zero-speed train when the train stops; operating a parking brake application button on a driver platform, outputting a power gain signal of parking application of the train line and a power loss signal of parking relief of the train line by the operation instruction mechanism; after the brake control mechanism receives three logic signals, providing a control power source and outputting a parking brake application instruction to the electromechanical actuating mechanism; controlling a forward rotation of a bogie brake motor by the electromechanical actuating mechanism to apply a control parking brake; after the brake application is completed, inputting a feedback signal into the brake control mechanism by the electromechanical actuating mechanism;
S3, brake relief of the parked train: energizing the zero-speed train when the train stops;
operating a parking brake relief button on the driver platform, outputting a power loss signal of parking application of the train line and a power gain signal of parking relief of the train line by the operation instruction mechanism; after the brake control mechanism receives three logic signals, providing a control power source and outputting a parking brake relief instruction to the electromechanical actuating mechanism; controlling a reverse rotation of the bogie brake motor by the electromechanical actuating mechanism to relieve a control parking brake; after the brake application is completed, inputting the feedback signal into the brake control mechanism by the electromechanical actuating mechanism; and
S4, brake application when the parked train is dormant: not applying the parking brake when the parked urban rail vehicle does not operate the parking brake application button; after the urban rail vehicle is dormant and before a DC 110V power supply of the brake control mechanism is cut off, inputting a dormant state signal to the brake control mechanism and the auxiliary mechanism by the operation instruction mechanism in the parked urban rail vehicle; at this time, automatically applying the parking brake by the brake control mechanism to complete dormant brake of the parked train.