Why not? 17 coupler is forbidden to connect with bus.

Because the automatic braking of the train adopts the way of pressure relief and exhaust braking, the train pipe of the bus adopts the constant pressure of 600kpa. Taking 18 train formation as an example, there is a time difference of more than 10 second from the first train exhaust to the last train exhaust. The greater the decompression, the greater the braking force and the greater the time difference.

The same is true for easing inflation. After the first car inflates to release the brake, the time difference of the last car exceeds 10 second. You can feel that impulse by train. The resultant force generated by the impact exceeds the strength of the couplers interconnected in the train compartment, which will cause the couplers to break.

Passenger cars shall not be directly linked with railway freight cars with 16 and 17 couplers;

Supplementary provisions on weaving and hanging vehicles in freight trains (including passenger cars, special vehicles and TK series military vehicles, etc.). ). For C63 and C63A gondolas, C76 series gondolas, 70t class wagons and 80t class wagons, buses are not allowed to be directly connected with wagons with couplers 16 and 17. When new car coupler models with installation numbers 16 and 17 are found, the vehicle department will announce them in time.

When connection is really necessary, according to the type of bus windshield, rubber windshield or iron windshield at the connection end, the fender and buffer strip shall be removed by the affiliated unit of China Railway Bus or the property right unit of its own bus, and the windshield of the folding shed shall be reliably put away, and then the fender shall be turned up or removed. When the train inspection found that the freight car with coupler was not. 16 and no 17 do not meet the requirements, it shall notify the station to adjust. The vehicle of the escort and the escorted vehicle shall be linked in groups and shall not be disassembled during transportation.