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What does NVH mean in cars?

1 Answers

LeoLynn

07/30/25 10:37am

Automotive NVH refers to the English abbreviation of Noise, Vibration, and Harshness. This is a comprehensive indicator for measuring the manufacturing quality of automobiles, providing the most subjective and superficial experience for car users. NVH issues in vehicles are one of the concerns for major international automobile manufacturers and component suppliers. Below are methods to improve automotive NVH characteristics: 1. First, control the vibration and noise sources: This requires improving the structure of components that generate vibration and noise, enhancing their vibration characteristics, and avoiding resonance. 2. Improve the balance of rotating components: This can enhance automotive NVH characteristics. 3. Increase precision: Improve the machining accuracy and assembly quality of components to reduce impact and friction between relatively moving parts. 4. Optimize fluid flow: Improve the flow conditions of gases or liquids to avoid the formation of vortices. 5. Enhance body structure: Improve the vehicle body structure to increase stiffness; apply sound waves with amplitudes equal to but opposite in phase to the noise source, etc.

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What are the vision requirements for a motorcycle license?

As long as the corrected vision can reach 4.9 or above on the logarithmic visual acuity chart. Below are the requirements for applying for a motor vehicle driver's license: 1. Height: For applying for large passenger vehicles, tractors, city buses, large trucks, or trolleybuses, the height must be 155 cm or above. For applying for medium-sized passenger vehicles, the height must be 150 cm or above. 2. Vision: For applying for large passenger vehicles, tractors, city buses, medium-sized passenger vehicles, large trucks, trolleybuses, or trams, the naked or corrected vision of both eyes must reach 5.0 or above on the logarithmic visual acuity chart. For other vehicle types, the naked or corrected vision of both eyes must reach 4.9 or above. For individuals with monocular vision impairment, if the naked or corrected vision of the right eye reaches 5.0 or above on the logarithmic visual acuity chart and the horizontal field of vision reaches 150 degrees, they can apply for a driver's license for small cars, small automatic transmission cars, low-speed trucks, three-wheeled cars, or special small automatic transmission passenger cars for the disabled. 3. Color discrimination: No red-green color blindness.

What are the reasons why a car cannot charge a mobile phone?

Insufficient power. A standard USB 2.0 provides 450mA power supply, which can only charge some feature phones. Under constant voltage, the lower the current, the smaller the power. Smartphones require a 1000mA power supply, so a dedicated car charger is needed, and the USB port must have at least a 1000mA power supply capability. Reasons for cigarette lighter socket damage: The internal spring plate has poor contact or the circuit is broken, resulting in no 12-volt output. The inspection method is to cover it with a cigarette lighter head, take it out after a while, and check whether the cigarette lighter wire turns red to determine whether the voltage is normal. Reasons for poor contact of the car charger: The contact head of the car charger and the contact spring plate are normally engaged in the cigarette lighter hole. Sometimes the spring plate contact is normal, but the contact head does not properly engage with the cigarette lighter hole, resulting in failure to charge.

Which country is Zongshen Motorcycle from?

Zongshen Motorcycle is a famous private enterprise in China. The meaning of Zongshen Motorcycle: Zongshen Motorcycle, founded in 1982, is a classic brand that has been deeply involved in China's motorcycle industry for more than 30 years. It provides excellent transportation tools for the general public, with a cumulative global user base of 20 million over the past 40 years. Advantages of Zongshen Motorcycle: Zongshen motorcycles have good quality. They have comparative advantages in terms of product quality, service life, and green energy efficiency. They are personal transportation vehicles that integrate mechanical and electrical systems, using batteries as auxiliary power sources. Based on ordinary motorcycles, they are equipped with motors, controllers, batteries, handlebar control components, and display instrument systems.

What type of driver's license is required for a four-wheel handlebar vehicle?

Four-wheel handlebar vehicles require a C1 driver's license. Meaning of a C1 driver's license: A C1 driver's license is one of the codes for motor vehicle driving licenses. The C1 license allows driving small and micro passenger vehicles, light and micro cargo vehicles, as well as light, small, and micro special-purpose operation vehicles (including all models under C2, C3, and C4). The examination subjects include traffic regulations and related knowledge, field driving, road driving, and safe and civilized driving common sense. Meaning of four-wheel electric vehicles: Four-wheel electric vehicles refer to purely electric vehicles with a maximum speed below 50 km/h. They include electric sightseeing vehicles, electric engineering vehicles, and specially modified electric vehicles.

Can a Motorcycle Start in Neutral Gear?

Motorcycles can start in neutral gear, but safety precautions should be taken. Steps for starting in neutral gear: First, sit on the motorcycle and hold the handlebars. Start the engine and support the bike with your right leg. If the motorcycle has a clutch, hold the clutch lever first, then use your left foot to shift into first gear. Gradually release the clutch while slightly increasing the throttle—be cautious not to give too much throttle, as releasing it suddenly may cause the bike to lunge forward and lead to accidents. If you're riding a semi-automatic motorcycle (e.g., a scooter without a clutch lever), skip the clutch step, shift into first gear, and gently accelerate to move forward. Lastly, always prioritize safety while riding. Method for starting a motorcycle with gears: When starting a motorcycle in neutral, hold the clutch lever firmly, shift into first gear, and slowly release the clutch while slightly increasing the throttle. Once the tachometer needle reaches around 3, gradually release the clutch lever to begin moving.

Can I Get the License Plate on the Same Day When Choosing a New Car Number?

If you choose the "10 choose 1" method for selecting a license plate number, you can usually get the plate on the same day. There are several ways to choose a license plate number: These include the "10 choose 1" method, self-selection, and online selection. If you opt for the "10 choose 1" method, you can typically receive the license plate immediately. However, if you choose the self-selection or online selection methods, you will need to wait for 15 working days to get your license plate. Rules for using temporary license plates: There are also requirements for using temporary license plates; they cannot just be placed randomly on the dashboard. According to regulations, two temporary license plates should be affixed: one should be placed on the upper right corner of the front windshield inside the car, in a position that does not obstruct the driver's view and should not be covered by the compulsory insurance label. The other should be placed on the upper left corner of the rear windshield inside the car.

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