CNR recalls 54 abnormalities of "dish car group" sensors

One day after the State Council Standing Conference called for the safety inspection of high-speed railways and their ongoing projects, the first recall of China High Speed ​​Rail was initiated by China North Locomotive, one of the two major high-speed rail vehicle manufacturers. However, in the “7.23” accident, China South Locomotive (4.47, +0.03, +0.68%) belonging to the two trains did not move. Although the cause of the accident has not yet announced the results.

China CNR announced that the company reported to the Ministry of Railways on August 11th “Report on Recalling CRH380BL EMUs” and reported to the Ministry of Railways for approval to recall the CRH380BL EMUs produced by Changke AG. The CRH380BL EMUs produced and put into operation by the subsidiaries of the Company are listed in the 54th column, and they are returned to use after they are qualified for rectification.

On the 10th recall, the State Council just convened an executive meeting to decide to carry out safety inspections on high-speed railways and projects under construction, and appropriately reduce the speed of new high-speed railways in the initial stage of operation, and reorganized systematic safety assessments for railway construction projects that have been approved but have not started yet.

On August 11th, CNR held a five-hour meeting, and finally decided to request the recall of the CRH380BL EMUs operated by the Beijing-Shanghai high-speed rail system to analyze the causes of the faults, comprehensively rectify and ensure the quality of the source, and ensure Safe operation.

"First Financial Daily" learned from CNR that the reasons for the recall are the same as those for suspending the CRH380BL EMU from the previous day. The main reason is that the CRH380BL EMU produced by CNR's subsidiary Changke Co., Ltd. During operation, faults such as false alarms of hot-axis alarms, auto-lowering of bows, and missing tractions occurred continuously. Most of these faults were caused by unqualified sub-supplier parts, and they were difficult to be quickly investigated and effectively rectified at the operation site.

“These failures are mainly due to the over-sensitive components and other parts, which will cause the train to slow down or stop automatically, which will affect the punctual arrival of the train. In the month of the Beijing-Shanghai high-speed rail operation, we have discovered that the trains have related failures. Among them, 70% is caused by this reason.” The CNR group insiders told reporters yesterday that parts and components are mainly provided by a number of Chinese and foreign parts suppliers.

Chairman of CNR, Cui Dianguo, said that since CRH380BL EMU developed by CNR had been put into operation, the railway operation department found many quality defects in the CRH380BL EMU. This time, due to the recall of CNR, the number of EMUs on the Beijing-Shanghai high-speed rail network has been reduced, which has affected at least 20 pairs of Beijing-Shanghai high-speed railways. The railway department has adjusted the Beijing-Shanghai high-speed rail operation chart.

Cui Dianguo said: "In the future work, we will strive to do a good job in R&D, manufacturing, commissioning and after-sales service." He said that the CNR research and development EMU follows the "fault-oriented security" principle and encountered When passengers smoke, water damage, lightning and other factors and their own operational faults, they will automatically decelerate or stop, and the operational information will be fed back to the dispatch center and the trains running before and after, which may affect the punctual arrival of the train, but it is sufficient to prevent The occurrence of any vicious traffic accident.

Strengthening the control of parts and components into the plant Cui Dianguo said that since the Beijing-Shanghai high-speed rail was opened, most of the CRH380BL's new generation of high-speed trains' accidental train deceleration and temporary parking were also the result of "fault-oriented security." He acknowledged that there are also a small number of faults caused by the quality of small components such as sensors, circuit boards, and communication modules provided by sub-suppliers. Therefore, strengthening the control of the EMU component parts into the factory and further enhancing the quality of the “NJM” EMU will be the top priority of this rectification.

Cui Dianguo also said to this: "In terms of sub-suppliers, we will fully organize them to find the crux of the problem and to carry out stronger and more targeted quality control of the quality of their products. At present, we have officially met with Chinese and foreign sub-suppliers. The principal responsible person requested to work closely with us to study the relevant faults of the online operation of the EMUs, investigate the causes of the faults, formulate effective and effective rectification plans, and work together to complete the quality rectification work on the CRH380BL EMUs as soon as possible."

Now, CNR (4.49, +0.04, +0.90%) is conducting a full-scale survey of CRH380BLs that have been delivered and undelivered, and is expected to resume normal delivery at around one year. In addition to CNR, another major high-speed rail vehicle manufacturer, the CSR Group, has no information on the recall of trains. The two trains that were involved in the “July 23′′ accident were both part of the CSR Group.