介绍了双腔三回路半挂汽车列车制动系的主要特点和工作原理。装有这种制动系的车辆,在行驶中任一制动回路失效后,仍有两个回路保持制动效能。还介绍了双轴应急制动装置,它能在脚制动失控的情况下使车辆中、后轴车轮产生充气制动。 The main features and working principle of brake system of double-chamber three-circuit semitrailer train are introduced. Vehicles fitted with such a brake system will still have two circuits that will maintain their braking effectiveness after any brake circuit has failed. Also introduced biaxial emergency braking device, which can brake in the foot brake out of control in the vehicle, the rear axle wheel inflated brake.