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What Causes Brake Disc Noise?

1 Answers

LaCaroline

07/25/25 4:21am

There are several reasons that may cause abnormal noise from a vehicle's brake discs: 1. New car brake noise: The brake pads and discs of a new car have not yet been fully broken in, so they may sometimes produce a "squeaking" friction sound, which is normal. The noise will naturally disappear after some use. 2. Noise after replacing brake discs/pads: After installing new brake pads, incorrect installation may cause noise. Common installation errors include installing the brake pads upside down, with the metal side touching the brake disc, resulting in abnormal noise. 3. Worn brake discs causing noise: Prolonged use can cause deep grooves on the brake disc surface or deep steps on the edges. Uneven contact between the brake pads and the disc can create noise. In this case, the brake discs need to be replaced or polished using a brake disc resurfacing machine. 4. Sand or debris in brake discs causing noise: If foreign objects like sand or small stones get between the brake pads and discs while driving, the brakes may produce a harsh hissing sound. Continuing normal driving will usually allow the debris to fall out, eliminating the noise. If the noise persists, the wheel may need to be removed to extract the debris. 5. Noise during hard braking: When braking hard, if you hear a clicking sound and feel vibration in the brake pedal, this is a normal phenomenon caused by the ABS system activating.

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What Does Maximum Horsepower Mean?

Maximum horsepower refers to the maximum power output that a vehicle can achieve, with horsepower measured in the unit Ps. The Origin of Horsepower: More than 200 years ago, engineers, based on the design by the British inventor James Watt, produced the world's first batch of improved steam engines. A brewery ordered one, intending to replace horses in driving a water pump. The brewery owner wanted to determine whether the steam engine's efficiency could match that of a horse. Therefore, he selected the strongest horse from his stable and made it work continuously for 8 hours without stopping. After calculation, it was determined that a horse could lift 75 kilograms of water by 1 meter per second, hence 1 horsepower = 75 kilogram-force・meters/second. Since then, this has been used as the unit of power for mechanical engines and continues to be used today. Metric Horsepower: Metric horsepower, also known as PS (Pferdestärke), is defined in a way that gives it a value very close to imperial horsepower. It is defined as the power required to lift 75 kilograms by 1 meter in 1 second. That is: 1 metric horsepower = 75 kilogram-force・meters/second = 735 watts.

Do New Energy Vehicles Produce Significant Current Noise During Acceleration?

Different new energy vehicles exhibit varying noise levels. Pure electric vehicles generally do not emit any sound while driving, except for some models that simulate the acceleration sound of traditional fuel-powered vehicles. New Energy Vehicles: New energy vehicles encompass four major types: Hybrid Electric Vehicles (HEV), Battery Electric Vehicles (BEV, including solar-powered vehicles), Fuel Cell Electric Vehicles (FCEV), and other new energy vehicles (such as those utilizing supercapacitors, flywheels, and other high-efficiency energy storage devices). Non-conventional vehicle fuels refer to fuels other than gasoline and diesel. Pure electric vehicles typically have two primary sources of noise: Firstly, the so-called electromagnetic noise, which is essentially the sound produced by the vibration of the conductors in the motor's rotor and stator due to electromagnetic forces. This is similar to the humming sound heard under high-voltage power lines, as the coils are not entirely immobile. Secondly, the axial vibration of the rotor caused by electromagnetic forces. Both of these noises result from the electromagnetic induction in the coils, meaning that the greater the current, the more intense the vibrations. This explains why electric vehicles tend to produce more noise during startup and less during normal operation.

Why does the Besturn B50's shock absorber make abnormal noises?

The damping force of the shock absorber spring and shock absorber damper does not match, causing excessive impact on the body by the suspension system on bumpy roads, resulting in abnormal noises. Mismatch between the damping force of the shock absorber spring and shock absorber damper: Higher fuel consumption, stiffer suspension, and stronger vibrations when passing over potholes. Partial component failures: Abnormal noises caused by looseness or deformation of chassis components. Abnormal noises from tire tread noise. Abnormal noises from internal components of the chassis, such as the engine or transmission. Abnormal noises from connecting parts of various transmission devices. Abnormal noises from front and rear wheel bearings. Abnormal noises from components caused by human errors during installation, replacement, or maintenance, such as loose screws, component interference, incorrect positioning, reverse installation, and other oversights or carelessness. This is very dangerous. Abnormal noises from important safety components: such as the braking system, which may produce direct dry grinding noises due to worn brake pads or reaching their limit; or chassis noises caused by lack of oil in the power steering system.

What Must You Bring When Picking Up the Car?

After picking up the car, you need to obtain the vehicle qualification certificate, purchase invoice, user manual, instruction manual, compulsory insurance policy, etc. Here is more information about picking up the car: 1. Precautions: After picking up the car, pay attention to the odometer reading, which is generally within 100 kilometers. Check for any debris in the radiator fins, whether the seat protective packaging and the plastic sheet on the front of the car are intact, and whether there are any stains on the interior driving position and dashboard. 2. Maintenance cycle: The first maintenance starts from 3000 kilometers to 5000 kilometers. The first 1500 kilometers within this range is the cautious period, which is the most important part of the break-in maintenance.

What Gear Should Be Selected for Charging Current of a 12V Car Battery?

For a 12V car battery, select gear 1 or 2 for charging current. Additional information: 1. Select based on battery capacity: The charging current is not determined by the battery voltage but by its capacity. The optimal current is 1/10 of the capacity. For example, a 10Ah battery is best charged with a 1A current. Using a higher charging current can reduce charging time but may damage the battery's lifespan. The current should preferably not exceed 1/3 of the capacity. 2. Flexible charging methods: For example, when charging a 12V 60Ah battery, use a constant voltage with current limiting method. Charge at a constant voltage of 14.8V with a current limit of 15A for 16 hours, followed by a constant current of 3A for 4 hours, totaling 20 hours. Also, consider whether time permits. Using a higher current reduces charging time but can harm the battery, so use it cautiously.

Can ETC be processed across provinces?

ETC can be processed across provinces. The agent needs to bring their own ID, as well as the vehicle owner's ID and driving license to an ETC service outlet. After filling out the relevant forms, the process can be completed. Benefits of installing ETC: Time-saving: Eliminates the hassle of waiting in line; Green and eco-friendly: Promotes low-carbon travel, as vehicles can pass through toll stations without stopping, reducing noise and exhaust emissions, thereby minimizing pollution; Cost-saving: Reduces expenses by decreasing the frequency of vehicle starts and brakes, lowering wear and fuel consumption. Users can also enjoy a 5% discount on toll fees; Improved efficiency: The efficiency of passing through ETC lanes can theoretically increase by 2-3 times, making traditional ETC more updated, faster, and more high-tech. Compared to license plate payment, ETC technology is more mature and advantageous.

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