The utility model relates to the technical field of automobile drive-by-wire
brake, in particular to a waterproof ventilation valve adaptive to a drive-by-wire
brake motor and a
simulation cylinder, which comprises a waterproof ventilation valve, a
simulation cylinder cover, a valve block and a motor, the waterproof ventilation valve comprises a valve main body, a protective cover, a waterproof ventilation film and a
rubber ring, a
threaded pipe is arranged at the bottom end of the valve main body, and the waterproof ventilation film is arranged in the
threaded pipe. The waterproof breathable valve is in threaded connection with the threaded hole through a
threaded pipe, an
airflow channel is formed in the threaded
pipe in a penetrating mode, the threaded
pipe at the bottom end of the valve body is connected with the threaded hole of the valve block through a conical thread, self-locking anti-loosening and rapid dismounting and mounting are achieved, and a waterproof breathable film is fixed to an annular boss on one side of a step face through
laser welding. The protection cover is installed on the valve body through the through hole, the avoiding groove in the lower end of the protection cover enables the buckle to be retracted and then reset, a
closed cavity is formed, large
foreign matter is prevented from impacting and damaging the waterproof breathable film, and
dirt is prevented from covering the waterproof breathable film.