Pneumatic brake master cylinder:
Main components: upper chamber piston, push rod, balance spring, return spring, upper chamber valve, lower chamber valve, air inlet, air outlet and vent, etc.
Working principle: When the driver steps on the brake pedal, a series of mechanical actions are used to close the exhaust valve and open the intake valve, so that the compressed air in the air reservoir enters the brake air chamber, thereby pushing the brake cam to rotate and achieve the braking effect of the wheel. Hydraulic brake master cylinder:
Main components: a tank for storing brake oil and a cylinder equipped with a piston. Working principle: When the driver steps on the brake pedal, the piston pushes the brake oil to generate pressure in the oil circuit. The pressure is transmitted to the brake cylinder of each wheel through the brake oil, thereby pushing the brake pad to rub against the brake drum, reducing the wheel speed and achieving the braking purpose.
