A train braking-to-traction delay control method and system
A technology of delay control and traction control unit, which is applied to electric braking systems, locomotives, electric vehicles, etc., can solve the problems of abnormal traction blockage and increased driving risk, and achieve the effect of reducing abnormal blockade and reducing delay.
Active Publication Date: 2019-05-14
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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Problems solved by technology
For example, when the delay is 4.47 seconds, the DCU did not receive the brake release relay signal 4 seconds after receiving the traction signal, and the reason for not receiving the brake release relay signal was due to the delay being 4.47 seconds rather than other reasons , if the air braking force does not dissipate normally, the traction will be abnormally blocked due to the delay of braking to traction
In addition, 4 seconds is the limit time determined by the DCU. If this limit time is prolonged in order to avoid the abnormal traction blockade in the above situation, the driving risk of the vehicle will increase.
Method used
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Embodiment Construction
[0045] The core of the present invention is to provide a delay control method for train braking to traction, which reduces the delay of braking to traction by sending the electric braking force complete disappearance signal in advance, and also reduces the occurrence of abnormal blockage of DCU traction .
[0046] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0047] Please refer to figure 2 , is the implementation flowchart of a kind of train braking to tract...
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The invention discloses a train braking-to-traction delay control method that comprises the following steps: a TCMS sends traction signals to a DCU and an EBCU; the DCU performs electric braking forcefading according to the traction signal and sends an electric braking force complete fading signal to the EBCU through the TCMS at a preset target time point, and the EBCU performs air braking forcefading according to the traction signal and the electric braking force complete fading signal; when the air braking force fades to zero, a braking release relay signal is sent to the DCU; and when theDCU receives the braking release relay signal within a limit time starting from the time when the DCU receives the traction signal, the traction control can be carried out according to the braking release relay signal and an obtained vehicle speed signal. By applying the technical scheme provided by the embodiment of the invention, the occurrence of abnormal blocking of DCU traction is reduced. The invention further discloses a train braking-to-traction delay control system which has corresponding technical effects.
Description
technical field [0001] The invention relates to the technical field of train control, in particular to a method and system for controlling the time delay of train braking to traction. Background technique [0002] Rail transit trains sometimes need to change from braking conditions to traction conditions, that is, braking to traction. This process mainly involves TCMS (Train Control and Management System, Train Brake Management System), DCU (Drive Control Unit, Traction Control Unit ) and EBCU (Electric Brake Control Unit, Electric Brake Control Unit). can refer to figure 1 , is a schematic diagram of the train topology, in figure 1 There are two trailers and four bullet trains, and the braking is transferred to traction based on the train brake management system TCMS. Specifically, the DCU located in the four-car train can receive traction commands to perform traction control, and the EBCU located in the four-car train and the two-car trailer can receive braking commands...
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IPC IPC(8): B61C17/00B60L7/00
Inventor 刘良杰陈新溅钱华许南南余接任应振华
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD