Hafei car on its new products Hafei Chun intended to report this description: "Chun intended to carry four wheel brake system, can only appear in the high-class car, different from the traditional micro-car front plate after the drum , More than the current popularity of the front panel, this fist advantage to similar micro-car difficult to hold a candle, the same type of car. "Find some car website, did not find the four-wheel disc and the difference between the front plate.
According to Encyclopedia in the "car brake system" Glossary: ??drum brakes drum brakes is a traditional way of braking, its working principle can be very image with a coffee cup to describe. Brake drums like coffee cups, when you put five fingers into the rotating coffee cup, the finger is the brake pads, as long as you will be a finger out, rubbing the inner wall of the coffee cup, the coffee cup will stop spinning. The drum brake on the car is simply said by the brake oil pump, piston, brake pads and tympanum, brake by the brake cylinder high-pressure brake oil to promote the piston, the two half-moon brake shoe exertion , So that it squeeze the inner wall of the tympanic, by friction to prevent the brake drum rotation to achieve the braking effect. Disc Brakes In recent years, the speed of cars has been increasing, and the total weight of trucks and buses has been increasing. In addition, the center of gravity of the car is generally reduced and the use of small diameter wide cross-section of the tire, so that the installation of the brake is limited, so the use of heavy trucks and cars with good braking heat stability can be a growing number of disc brakes. The disc brakes can be divided into clamp disc brakes and full brake two. Disc brakes, also known as disc brakes, the working principle can be used to describe a dish, you use the thumb and forefinger to hold the rotating plate, the plate will stop spinning. The disc brakes on the car are made up of brake oil pumps, a brake disc connected to the wheel and a brake calipers on the disc. Brake, the high-pressure brake oil to promote the piston within the caliper, the brake shoe will be pressed against the brake disc to produce the braking effect.
Hello and drum brakes compared to the advantages of disc brakes are: 1. Thermal stability is better. This is because the brake disc on the friction pad friction-free effect, but also because the brake friction pad size is not long, the working surface area of ??the brake disc area is only 12% to 6%, so the heat it is good. 2. Water stability is better. Because the brake pad on the disk unit pressure is high, easy to squeeze out the water, while the role of centrifugal force after the water is also easy to get rid of, coupled with the pad on the disc wipe effect, so after the water only by One, the second brake that can return to normal; and drum brakes are required to go through more than ten times the brake can be restored to normal braking performance. 3. Good braking stability. The brake torque of the disc brake is linearly related to the piston thrust and friction coefficient of the brake cylinder, and the self-propelled force is added. Therefore, the braking torque increases more slowly during the braking process. Compared with the drum brake, Can guarantee high braking stability. 4. The braking torque is independent of the vehicle's forward and backward travel. 5. The quality and size of the disc brakes are smaller than the drum type under the condition of outputting the same braking torque. 6. Disc-type friction pad than the drum-type friction lining after wear easier to replace, the structure is also relatively simple, easy maintenance. 7. The gap between the brake disc and the friction lining is small (0.05 ~ 0.15mm), which shortens the operation time of the cylinder piston and increases the force transmission ratio of the brake drive mechanism. 8. The thermal expansion of the brake disc does not cause the brake pedal stroke loss as the thermal expansion of the brake drum, which also simplifies the design of the gap automatic adjustment device.
The difference is that disc brakes and drum brakes, double disc brake refers to the front wheel and rear wheels are disc brakes, is commonly known as disc brakes, front disc after the drum refers to the front wheel with disc brakes, rear wheel Type brake. Disc brake (disc brake) brake high efficiency, more stable, modern cars are generally used ventilation-type disc brakes as front wheel brakes; rear wheel brake is the main role of parking, drum brake parking effect is better, so There are many car rear wheels using drum brakes.
