What are the new regulations for household vehicle inspections?

What causes the brakes to feel soft and then hard intermittently?

Brakes feeling soft and then hard intermittently is because the vacuum booster pump is not yet operational at that moment. The methods for brake maintenance are as follows: 1. Avoid sudden braking: Emergency braking significantly damages the brake pads, so it's important to brake gently during normal driving or use the technique of pumping the brakes, which causes less wear on the brake pads. 2. Reduce the frequency of braking: Develop a good habit of minimizing brake usage during normal driving. You can first use engine braking to reduce speed before applying the brakes for further deceleration or stopping. Downshifting can also be used more frequently to slow down. 3. Regularly inspect the brake pads: After the vehicle has traveled 40,000 kilometers or been in use for over 2 years, the brake pads may be significantly worn. It's essential to conduct thorough periodic inspections to check if the thickness of the brake pads has reached the minimum limit. If it's close to the limit, the brake pads should be replaced. Under normal driving conditions, inspect the brake pads every 5,000 kilometers, checking not only the remaining thickness but also the wear condition of the pads, whether the wear is even on both sides, and if they retract smoothly, among other factors.

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What are the names of the parts inside the transmission?

Transmission parts are named as follows: 1. Torque converter: The torque converter is mounted on the engine flywheel. Its function is to transmit engine power to the planetary gear transmission mechanism and provide a certain torque conversion capability. 2. Planetary gear transmission mechanism: The planetary gear transmission mechanism consists of two parts: the planetary gear set and the shift actuation mechanism. The planetary gear set consists of 2-3 rows of planetary gears to achieve 2-5 gear ratios; the shift actuation mechanism enables the change of gear ratios, i.e., automatic shifting. 3. Hydraulic control system: The main task of the hydraulic control system is to provide the required oil pressure to various systems of the automatic transmission based on signals such as engine load (throttle opening) and vehicle speed (speed sensor). It also switches hydraulic channels according to the gearshift lever position and driving conditions to control the torque converter and gear transmission system, as well as the operation of the lock-up clutch in the torque converter. 4. Electronic control system: In the electronic control system, sensors collect various signals, such as throttle position, vehicle speed, coolant temperature, etc., and convert them into electrical signals sent to the electronic control unit (ECU). The ECU processes the data and compares it with preset shift patterns, then sends commands to the solenoid valves to determine the correct shift timing and gear position.

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What Causes Brake Pads to Squeak When Wet?

The reasons for brake pads squeaking when wet are as follows: 1. Human factors causing the noise: It may be due to improper installation by the mechanic, where upon removal, you can see that only part of the brake pad surface shows signs of friction. Sudden noise after driving for a while is mostly caused by hard objects on the road, such as sand, gravel, or metal scraps, getting stuck in the brake pads when braking. Another issue stems from manufacturers—friction blocks of the same model brake pads may have inconsistent dimensions, especially in width, with some manufacturers having deviations of up to three millimeters. This results in a seemingly smooth brake disc surface, but if a larger brake pad is installed on a disc that was previously used with a smaller pad, it will also cause noise. 2. Product factors like brake pad material causing the noise: For example, if the brake pad material is too hard or of poor quality. While the use of asbestos-containing brake pads is prohibited, some small manufacturers still produce and sell them. Semi-metallic, asbestos-free brake pads, though offering longer mileage and being more environmentally friendly and healthier, tend to be harder in material. In contrast, asbestos brake pads, being softer, often do not produce noise even if there are scratches on the brake disc and provide a softer braking feel. If the noise is due to such material issues, the only solution is to replace the brake pads with new ones.

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Where to Stop After Reversing into the Parking Space?

When reversing into a parking space, the technique of stopping based on the rear wheels' position is generally not recommended. Some test vehicles have longer rear ends while others have shorter ones. The scoring criteria for the test require that the vehicle body must not cross the line. Relying on the rear wheels' position might overlook the vehicle's length, often leading to the body crossing the line and resulting in point deductions. It is advisable to use the method where the lower edge of the rearview mirror aligns with the parking space line to determine the stopping point. Below are the key points for reversing into the space (using right-side reversing as an example): 1. First point: When the lower edge of the left rearview mirror aligns with the parking line parallel to the left rearview mirror, turn the steering wheel fully to the right. 2. Second point: When the most protruding part of the vehicle body and the right corner of the parking space appear two fingers' width apart in the right rearview mirror, turn the steering wheel one full turn to the left. 3. Third point: In the right rearview mirror, when the right corner of the parking space points to the middle of the front door handle, turn the steering wheel fully to the right again. 4. Fourth point: When the left rear corner of the parking space is visible in the left rearview mirror, immediately straighten the steering wheel. 5. Fifth point: The stopping point inside the parking space is when the lower edge of the left rearview mirror is about to align with the parking line parallel to the left rearview mirror.

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What type of engine oil is suitable for Jetta VS7?

The original engine oil is the recommended choice for Jetta VS7, with a viscosity grade of 5W-40. In terms of compatibility, the original oil is well-suited for the engine. However, depending on specific needs, other engine oils may offer additional benefits such as noise reduction, fuel efficiency, or enhanced performance. Therefore, brands like Mobil, Shell, and Castrol can also be considered. The viscosity of engine oil changes with temperature, so it's crucial to pay attention to its performance under both low and high temperatures. For example, in 5W-30, the first number indicates low-temperature fluidity, where 5W means it can withstand temperatures as low as -30°C. A smaller number indicates better low-temperature fluidity, ensuring smoother cold starts for the vehicle. The second number represents the oil's kinematic viscosity at 100°C, with higher values indicating better viscosity retention at high temperatures, which can be interpreted as superior lubrication performance under high-temperature conditions. When selecting engine oil, consider the following points: Choose engine oil based on the engine's requirements. It's unnecessary to use overly advanced oil in engines with lower requirements, and similarly, lower-grade oil should not be used in engines with higher demands. Multi-grade oils are preferable due to their cost-effectiveness, longevity, and efficiency, providing better protection for the engine. Due to the nature of multi-grade oils, they may appear darker prematurely and exhibit lower oil pressure compared to conventional oils, both of which are normal phenomena.

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What brand is Wingro tires?

Wingro is a tire brand under Giti, known for its wear-resistant tires. Due to its focus on durability, the tire texture tends to be harder. Giti Wingro utilizes a composite tread rubber compound and an open-groove tread pattern design, making it suitable for small and medium-sized commercial vehicles. As one of the world's leading tire manufacturers, Giti offers a comprehensive range of high-quality tires to meet the needs of various vehicles, including sedans, racing cars, SUVs, off-road vehicles, trucks, buses, construction machinery, and agricultural machinery. Giti Tire, founded in Singapore, is an international tire manufacturing company headquartered in Shanghai, with seven factories across five strategic cities in China. It is one of the world's technologically advanced tire producers, providing a complete lineup of high-quality tires. Giti employs a multi-brand strategy to cater to market demands, with North America and Europe as its primary export markets. Its products are sold in over 100 countries and regions worldwide. Giti is one of China's largest international tire manufacturers. Giti offers a wide range of tire models, each with varying degrees of wear resistance. Giti tires are divided into four series: Giti Drive Control Series, Giti Comfort Series, Giti SUV/Off-Road Series, and Giti All-Season Series. The Giti Drive Control Series incorporates ISOM finite element carcass structure design derived from Giti's racing R&D technology, featuring high-strength polyester cord carcass and ultra-hard bead filler. This not only enhances tire safety but also improves handling precision. The robust outer shoulder tread blocks and lateral groove design minimize tread deformation during cornering, providing stronger support for high-speed turns. The Giti Comfort Series employs 3P technology and multi-pitch chaotic tread pattern arrangement, effectively reducing road noise and improving comfort, while also offering long mileage and fuel efficiency. The Giti SUV/Off-Road Series utilizes the 'Durable Contact Patch' technology to enhance tread-ground contact and a low rolling resistance wear-resistant compound, reducing rolling resistance while increasing tire durability. Additionally, the double-layer high-strength polyester carcass and high-modulus steel belt improve carcass uniformity, mitigating road bumps for a smoother ride. The Giti All-Season Series excels in wet and dry traction, delivering consistent performance in both winter and summer conditions. When using Wingro tires daily, pay attention to the following: Regularly inspect the tire surface for cracks, deformations, or other defects. As tires wear, the tread grooves gradually become shallower. If the tread is worn flat, it loses its water drainage and anti-skid functions, significantly reducing vehicle performance. Small cracks may also pose a risk of blowouts at high speeds. Additionally, promptly remove stones lodged in the grooves. Park on level ground whenever possible. Avoid parking on roads with thick, sharp, or pointed stones. Do not park near or in contact with petroleum products, acids, or other materials that may deteriorate rubber. After parking, avoid turning the steering wheel, as this accelerates tire wear. Do not splash water to cool overheated tires. In hot weather or during high-speed driving, tires may overheat, increasing air pressure. In such cases, stop to let the tires cool naturally. Never release air pressure or splash water to cool them, as this may cause abnormal aging of the tread rubber. Avoid sudden braking. Minimize frequent or hard braking to prevent accelerated tread wear from tire-ground dragging.

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What are the new regulations for household vehicle inspections?

What causes the brakes to feel soft and then hard intermittently?

What are the names of the parts inside the transmission?

What Causes Brake Pads to Squeak When Wet?

Where to Stop After Reversing into the Parking Space?

What type of engine oil is suitable for Jetta VS7?

What brand is Wingro tires?

Does Jianghuai Automobile have new energy vehicles?

How deep can the BYD Qin hybrid wade through water?

Can You Drive When Water Submerges the Exhaust Pipe?

What are the causes of brake dragging?