Air brake and rail vehicle

The invention provides an air brake and a rail vehicle. The air brake comprises an internal combustion engine, an air compressor and an air cylinder; an electric generator, a super capacitor and a motor are arranged between the internal combustion engine and the air cylinder, the internal combustion engine drives the electric generator to generate electricity, the output end of the electric generator is connected with the input end of the super capacitor, the super capacitor is used for storing electric energy, the output end of the super capacitor is connected with the input end of the motor,the electric generator is connected with the air compressor and drives the air compressor to operate so as to generate compressed air, the air compressor is connected with the air cylinder, and the compressed air generated by the air compressor is conveyed into the air cylinder. By adopting the air brake, when the rail vehicle needs to stop, the electric energy stored in the super capacitor can be used for driving the ai