From the brake system, we talked about the components of the brakes, and what are the functions of the brakes. We also hope that the fans can have a specific understanding of the modified parts of the brake system on the market.
Modern brake systems are roughly divided into two types: drum brake systems and disc brake systems. Today we are discussing the theme of disc brake systems (drum brakes have been eliminated by most models due to more harm than good). How the brake works: When we deduct the brake lever to squeeze the master cylinder piston, the generated hydraulic pressure channel is transmitted to the caliper, and the caliper piston is pushed to generate friction between the disc and the disc to achieve the deceleration effect, and the disc brake system It is divided into five parts:
Master pump:
To put it simply: the function of the master cylinder is to conduct hydraulic pressure to the calipers. In terms of form, it can be divided into two types: side push and direct push.
The first type: the side thrust cylinder pull rod movement and the direction of the master cylinder piston are vertical, so the front end of the rod uses a cam-like design, so the side push master cylinder is not linear in use, and the thrust pump rod and piston are directly pushed. It is a parallel relationship, and the pull-down rod can simultaneously squeeze the piston through the ejector pin, so the direct push pump can provide more linear and direct hydraulic transmission when the master pump is actuated.
Side push master pump design: the rod movement direction and the piston pushing direction are perpendicular to each other
Direct push pump rod and piston are parallel
The difference between the direct push/side push master pump in the operation (the way the different manufacturers design, the actual work performance will be different, this chart is for simple indication)
Caliper:
The principle of the caliper is to use hydraulic pressure to push the internal piston, and the piston exerts force to make the piece rub against the disc to achieve the braking effect. The caliper is manufactured by casting and forging, and the caliper main body design is divided into multiple pieces and Integral type, from single piston to multi-piston, one-way and two-way. Today's mainstream matching is based on the opposite four-piston.
Forged calipers are stiffer and lighter than conventional casting calipers
The one-piece caliper has a high overall rigidity and can accept more shearing forces from the brakes and self-distorting conditions.
At present, the mainstream modified calipers are mainly oriented with four pistons.
Tubing:
Most of the manufacturers' oil pipes are made of rubber, which can reduce the cost and maintain the elasticity. However, the rubber oil pipe will expand due to the hydraulic pressure, and the loss should be transmitted from the main pump to the hydraulic pressure of the caliper. During long-term repeated use, long-term exposure to sunlight can also cause the rubber tubing to age, causing cracks and breakage.
Therefore, the replacement of the tubing material (such as metal) which is more resistant to high pressure and high temperature and is not prone to deformation can make the hydraulic transmission effect more stable, direct and efficient, and can effectively prevent the accident caused by the damage of the tubing.
Rubber tubing will cause aging of rubber due to prolonged use and sun exposure
Modified metal tubing can make hydraulic pressure transmission better, but the brake feel will become harder.
Order film:
The main function of the film is to rub with the disk, using friction to transform the kinetic energy into the original heat. The braking performance can be divided into: asbestos, non-asbestos (NAO), semi-metal sintering ( SEMI-me taLLIC), metal sintered (MMC), composite material (CONSTITUENT), etc.
Since the film will provide a lot of heat when it provides the braking effect, and the faster and heavier the car will add more kinetic energy, the burden of the braking system will become larger, so the brakes will be modified. When not only paying attention to the level of friction coefficient, but also considering whether high temperature resistance is also the focus of choice.
Sintering of the metal allows the sheet to greatly increase the braking force, but the operating temperature is also relatively high.
According to the composition, the film has different effects on the braking force, including the working temperature.
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