B−Quik Car Knowledges

Brake System

Additional Safety System

Electronic Breaking Distribution (EBD) This system can help to increase efficiency of the brake, by sending the right level of brake pressure to each wheel at the right moment and situation. It, therefore, helps to create balance for the front and back pairs of wheels, as well as right and left pairs of wheels. Emergency Breaking Assistant (EBA) When the driver needs to come to an emergency stop, the EBA system will automatically and immediately help to increase the brake pressure, for highest brake efficiency. It helps to reduce the range of brake and increase safety. The ABS, EBD and EBA together with the front control-arm suspension and multi-arm suspension in the back will help to provide safety and comfort while driving.

Brake System

Let get know the car brake system.

Types of Brake

Drum Brake A set of drum brake consists of a drum, which is a round, metal disk attached to the axle-nut of the wheel and rotated together with the wheel; and the brake shoe that consists of brake pad, brake setting mechanism, return spring and wheel cylinder. Brake fluid tube is connected to the wheel cylinder, in order to press the brake pad against the drum to create friction, and hence, resistance. Disc Brake Disc Brake is considered standard brake equipment mostly used in older car models. Now that disk brake is becoming more popular, the disk brake system can be found in the front wheels while drum brake system is applied to the back wheels. Disk brake system for all 4 wheels can also be seen today. However, the system selected actually depends on the system designed by each car manufacturer, for the purpose of highest efficiency of each car model.

Cautions and Maintenance for the Brake System

1. Brake fluid should be changed every 25,000 km. 2. Do not reuse the discharged brake fluid 3. If brake fluid spills over the car and its color, clean it off at once 4. Air-bleeding should be done only if you have thorough knowledge on the brake system of that car model 5. Do not ever use the brake fluid in place of lubricant or grease 6. Brake fluid made from mineral oil can be used in some car models or as specified by some car manufacturers only 7. Brake fluid made by the same chemical substances, with the same SAE standard, or with the same DOT standard can be mixed together 8. Grease to be applied on the rubber seal in the brake system must be made from vegetable oil only 9. Do not mix brake fluid of different standards or different chemical ingredients

Brake Pressure Alleviation System

The equipment used to help alleviating brake pressure is brake booster, operated by a vacuum system. There is a diaphragm inside the brake booster, and a pipe that connects the brake booster to the intake manifold. When the engine is running, the air intake from the manifold is being sucked in for combustion, while at the same time the air from the brake booster is being sucked in as well. As a result, the air pressure in the brake booster is lowered to the point closer to vacuum. When the driver needs to slow down or come to a stop, he/she will step on the brake pedal. At that point, the metal rod attached to the brake pedal will move and press the air valve of the brake booster to open, quickly letting the outside air in. The air will then push the diaphragm that is attached to the master cylinder pedal, which will then move and press on the piston in the master cylinder the same time the driver’s foot is pressing on the brake pedal. As a result, the driver will feel only a gentle press on the pedal of the brake. When the driver releases his/her foot from the brake pedal, the pedal will return to its original position. The air valve of the brake booster will close, while the air inside the brake booster continues to be sucked out and utilized consistently until the engine is turned off. In the case that the engine is turned off, the vacuum condition inside the brake booster remains. As such, after the engine has been turned off, you will continue to feel the gentleness of the brake pressure only after 2-3 pressings, as the air outside of the brake booster will flow inside, while there is no air sucking activity from the brake booster for further usage (because the engine is not running, and hence, no air intake activity). When the air is filled up inside the brake booster, there is no pressure from the brake booster to help pressing the piston in the master cylinder. Therefore, the driver will have to apply more pressure on the pedal of the brake as a result.

Types of Brake Pad

Brake pad is a tool that creates friction when pressure is made on the brake disk or drum brake. It can be divided into 2 types: 1. The fibrous silicate mineral known as asbestos. When the brake is pressed upon, the material will turn into white powder, producing air pollution. This type of brake pad was used in the past. It is quiet but does not work effectively in high heat or wet conditions. 2. Graphite and carbon type: when the brake is pressed upon, the material becomes black powder. This type of brake pad works well and effectively in high heat and wet conditions. Quality of brake pad produced from fibrous silicate mineral Pros : • The brake pad has high rate of friction • Its soft texture makes it less possible to produce noise • It is easy to find and at a low cost Cons : • It has low heat-resistance ability, and may possibly fade or become slippery when strenuously used • Harmful to the environment and human beings. It can cause lung cancer. • Easily eroded because of its soft texture • The brake range fluctuates with temperature Quality of brake pad with no fibrous silicate mineral in the ingredient Pros : • Higher heat-resistance quality • Not harmful to the environment Cons : • High cost of production

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