What is the Friction Coefficient of Brakes?

1 Answers
LaClayton
07/30/25 6:36am
The friction coefficient of brakes refers to the ratio between the frictional force of two surfaces and the vertical force acting on one of the surfaces, specifically the ratio between the frictional force of the brake pads and brake discs and the force exerted by the wheel cylinder on the brake pads. Below is relevant information about brakes: 1. Drum Brakes: Two semi-circular brake shoes are installed inside the wheel hub, and the "lever principle" is used to push the brake shoes into contact with the inner surface of the hub, generating sufficient friction to reduce the wheel's rotational speed, thereby achieving braking. 2. Disc Brakes: A brake caliper controls two brake pads to clamp onto the brake rotor on the wheel. When the brake pads clamp the rotor, friction is generated between them to reduce the wheel's rotational speed, allowing the car to slow down or stop. 3. ABS Anti-lock Braking System: Most modern cars are equipped with an ABS anti-lock braking system, which ensures the car maintains directional control while braking without skidding or fishtailing. The principle of ABS is equivalent to manually creating intermittent braking, but this intermittent braking technology operates at a higher frequency and faster speed. Therefore, when a vehicle with ABS encounters an emergency, the brake must be pressed firmly and fully in one motion.
Was this review help?
7
0
Share
More Forum Discussions

Which parts are included in car air conditioning cleaning?

When cleaning the air conditioning system, the parts that need to be cleaned include: 1. Air conditioning intake pipes/air filter; 2. Air vents; 3. Fan blades; 4. Evaporator; 5. Sponge grid, etc. After prolonged use, dust and dirt will accumulate at the air intake, air ducts, fan, and evaporator surface of the car air conditioning system, leading to mold growth inside the air ducts (including the evaporator). The most noticeable effects are reduced cooling efficiency and obvious unpleasant odors. The key areas for cleaning are: air conditioning intake pipes, air filter, air vents, fan blades, and evaporator. If there is still an odor after cleaning the air conditioning system, it means there is dirt inside the evaporator or air conditioning pipes, and the only solution is to disassemble and clean the air conditioning pipes and evaporator.
14
0
Share

What Are the Signs Before a Transmission Failure?

Transmission failure signs include transmission fluid leakage, engine stalling when shifting gears, and abnormal transmission noises. Transmission fluid leakage: Transmission fluid primarily serves to lubricate, clean, cool, prevent rust, and seal. Therefore, insufficient transmission fluid will lead to inadequate internal lubrication, causing severe wear. If significant transmission fluid leakage is detected, it must be addressed promptly. Otherwise, prolonged gear wear will render the transmission irreparable. The solution is to promptly inspect the cause of the leakage and replenish the transmission fluid. Engine stalling when shifting gears: If the engine stalls when shifting gears, check whether the gear engagement impact is severe. If it is, the shift actuators may be slipping or the hydraulic pressure solenoid valve may not be functioning. The solution is to call for roadside assistance and wait for a tow truck to transport the vehicle to a repair shop. Abnormal transmission noises: Abnormal transmission noises are generally caused by wear or damage to bearings and transmission components, or by the low precision of replacement parts. If abnormal noises occur, the worn transmission components should be replaced to prevent further wear. The solution is to promptly replace damaged parts such as bearings.
17
3
Share

How to Disassemble the Rearview Mirror of Baojun 510?

To disassemble the rearview mirror of the Baojun 510, first, pinch the rear cylinder and then rotate it counterclockwise by 45 degrees to remove it. The exterior rearview mirror reflects the rear and side areas of the car, the lower rearview mirror shows the front and lower areas, and the interior rearview mirror displays the rear and interior conditions of the car. Here are some details about rearview mirrors: 1. The car's rearview mirrors reflect the rear, side, and lower areas of the car, allowing the driver to indirectly see these areas and expand their field of vision. 2. The left and right rearview mirrors and the interior rearview mirror serve different purposes, and their mirror structures may vary. 3. There are mainly two types of rearview mirror surfaces: flat mirrors and convex mirrors.
7
2
Share

How to Remove Frost from the Outside of Car Windows?

According to the thickness of the frost, it can be removed as follows: 1. If the frost on the car's front windshield is not thick, start the engine to warm it up and then turn on the defrost mode. 2. If the frost on the front windshield is particularly thick, turning on the defrost mode may not remove it quickly. In this case, you can use a plastic card to scrape off a layer of the frost from the front windshield, then turn on the front windshield defrost mode. 3. If the frost on the front windshield is extremely thick, spray anti-freeze windshield fluid on it. The frost will melt, and then use the wipers to remove the melted frost from the front windshield before turning on the front windshield defrost mode.
19
0
Share

Is Southeast Motors a Domestic Brand?

Southeast Motors is classified as a domestic vehicle brand and also falls under the joint venture category. Here are some key details about Southeast Motors: 1. Established in 1995, Southeast Motors is a joint venture formed by Fujian Motor Industry Group Co., Ltd., China Motor Corporation under Taiwan's Yulon Group, and Japan's Mitsubishi Motors. 2. The logo of Southeast Motors features a 'Roc Bird', symbolizing noble leadership and reflecting the company's forward-looking, dynamic, and energetic corporate style, along with its vision of 'Soaring from the Southeast to the World'. 3. The logo's design creatively incorporates the initials 'S' and 'E' from 'SOUTH' and 'EAST', representing Southeast Motors.
18
3
Share

How many items are there in Subject 4 exam?

There is only one item in the Subject 4 exam, which mainly tests knowledge related to safe and civilized driving. The scope of the Subject 4 exam includes: driving knowledge under adverse weather and complex road conditions; identification of common traffic signs, markings, and gestures; knowledge of traffic accident rescue and common hazardous material handling; comprehensive judgment of illegal behaviors and case analysis; knowledge of avoiding danger in emergency situations; safe driving knowledge; and knowledge of driving ethics and civilized driving. The types of exam questions include image analysis, animated case studies, and text descriptions. According to the "Regulations on the Application and Use of Motor Vehicle Driving Licenses," Subject 4 consists of 50 questions, each worth 2 points, totaling 100 points. Questions 1-10 are true/false questions; questions 11-40 are single-choice questions; and questions 41-50 are multiple-choice questions. According to the "Regulations on the Application and Use of Motor Vehicle Driving Licenses," there is no limit to the number of attempts for Subject 1 and Subject 4 exams. If the first attempt on the same day is unsuccessful, an immediate retake is allowed. If it still fails, a new appointment is required, and no additional fees are charged for retakes. However, it is important to note that the validity period of the driving skills test permit is three years. If the applicant fails to complete the exam within this period, the results of any previously passed subjects will be voided. Subject 4, also known as the Subject 4 theory test or driver theory test, is part of the motor vehicle driving license assessment. After the implementation of the Ministry of Public Security's Order No. 123, the Subject 3 exam was divided into two parts: the road test and the addition of a safe and civilized driving knowledge test, commonly referred to as "Subject 4." Subject 4 is the colloquial name for the Subject 3 safe and civilized driving knowledge test and is not a separate subject. Since this test is conducted after Subject 3, it is commonly referred to as the Subject 4 exam. Officially, there is no Subject 4. The safe and civilized driving knowledge test is conducted after Subject 3. Subject 4 exam precautions: Exam duration: The exam lasts 30 minutes. If 12 points (6 questions) are lost during the exam, the session will be terminated. Number of questions: Depending on the type of driving license being pursued, 50 questions are selected proportionally from the corresponding Subject 4 question bank, with each question worth 2 points. Question types: The exam includes single-choice questions (including true/false questions) and multiple-choice questions. Questions 1-10 are true/false questions; questions 11-40 are single-choice questions; and questions 41-50 are multiple-choice questions. The exam also includes animated questions, image-based questions, scenario recognition questions, and text-based questions. Retake precautions: If Subject 4 is not passed, only Subject 4 needs to be retaken. The driving school will schedule the retake, and there is no limit to the number of retakes. No additional fees are charged for Subject 4 retakes. There are a total of 3 subjects in the driving test: Subject 1, Subject 2, and Subject 3. The Subject 3 exam is divided into two parts. Subject 1 refers to the exam on road traffic safety laws, regulations, and related knowledge; Subject 2 refers to the field driving skills test; and Subject 3 refers to the road driving skills and safe and civilized driving knowledge test.
8
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.