The manipulation method is to step on the pedal with one foot of the left foot to take effect; Press your left foot hard again, and then release the handbrake. Of course, there are other ways. For example, the foot-controlled parking brake of Mercedes-Benz needs manual auxiliary release: there is a handle on the left side of the steering wheel, which can be released by pulling it with your hand.
Parking brake type refers to the operating mode of parking brake. At present, the operation modes of parking brake on passenger cars can be divided into three types: hand brake, foot brake and electronic parking.
There are two kinds of automobile braking systems: drum brake and disc brake.
Drum brake is a traditional braking system, and its working principle can be vividly described by a coffee cup. The brake drum is like a coffee cup. When you put five fingers in a spinning coffee cup, the fingers are brake pads. As long as you stretch out your five fingers and rub the inner wall of the coffee cup, the coffee cup will stop turning. The drum brake in automobile is simply composed of brake oil pump, piston, brake pad and drum chamber. When braking, the piston is driven by high-pressure brake oil from the brake cylinder. That's right.
Similarly, the working principle of disc brake can be described as a disc. When you hold the rotating disc between your thumb and forefinger, the disc will stop rotating. The automobile disc brake is composed of a brake oil pump, a brake disc connected with wheels and a brake caliper on the brake disc. When braking, the high-pressure brake oil pushes the piston in the caliper and presses the brake shoe against the brake disc, resulting in braking effect.
Disc brakes are sometimes called disc brakes, which are divided into ordinary disc brakes and ventilated disc brakes.
Ventilated disc brake is to reserve a gap between two brake discs so that air can pass through this gap. Some ventilation disks also drill many circular ventilation holes on the disk surface, or cut ventilation slots or prefabricate rectangular ventilation holes on the disk surface. Ventilation disc brake uses the action of air flow, and the cold and hot effect is better than that of ordinary disc brake. The main advantages of disc brake are that it can brake quickly when braking at high speed, the heat dissipation effect is better than that of drum brake, the braking efficiency is constant, and it is convenient to install advanced electronic equipment such as ABS. The main advantages of drum brake are less brake shoe wear, low cost and convenient maintenance. Because the absolute braking force of drum brake is much higher than that of disc brake, it is widely used in rear-wheel drive trucks.