A car inevitably vibrates due to natural aging, friction, abrasion, oxidation, deformation, etc. as it is used.Noise increases. For example, when parked for a long time under the hot sun in summer, the vehicle's interior temperature is close to 100°C, but at night it is below 20°C. Therefore, the te...
A car inevitably vibrates due to natural aging, friction, abrasion, oxidation, deformation, etc. as it is used.Noise increases. For example, when parked for a long time under the hot sun in summer, the vehicle's interior temperature is close to 100°C, but at night it is below 20°C. Therefore, the temperature difference between a vehicle in the cold winter and a car in the open-air parking condition for a long time at night is the same in the summer. Parts due to these temperature differences routinely contract and expand, loosening the tightening of bolts or bonding of adhesives and loosening pins or clips. At the same time, the condensation of moisture and the repetition of medium feet lead to corrosion and deterioration. In addition, lubricating oil, hydraulic operating oil and coolant quality poor, deterioration and leakage, and inadequate fuel movement cause or promote vibration noise. For this reason, noise and vibration occur frequently over time and their intensity becomes greater and greater. Therefore, the purpose of the NVH standard level is to provide the criteria for various engine failures, chassis deformation and wear that occur in actual vehicles for the above reasons, thereby contributing to the suppression of excessive economic maintenance costs and rapid and accurate maintenance, while extending the durability of automobiles and laying the foundation for the development of new technologies.A car inevitably vibrates due to natural aging, friction, abrasion, oxidation, deformation, etc. as it is used.Noise increases. For example, when parked for a long time under the hot sun in summer, the vehicle's interior temperature is close to 100°C, but at night it is below 20°C. Therefore, the temperature difference between a vehicle in the cold winter and a car in the open-air parking condition for a long time at night is the same in the summer. Parts due to these temperature differences routinely contract and expand, loosening the tightening of bolts or bonding of adhesives and loosening pins or clips. At the same time, the condensation of moisture and the repetition of medium feet lead to corrosion and deterioration. In addition, lubricating oil, hydraulic operating oil and coolant quality poor, deterioration and leakage, and inadequate fuel movement cause or promote vibration noise. For this reason, noise and vibration occur frequently over time and their intensity becomes greater and greater. Therefore, the purpose of the NVH standard level is to provide the criteria for various engine failures, chassis deformation and wear that occur in actual vehicles for the above reasons, thereby contributing to the suppression of excessive economic maintenance costs and rapid and accurate maintenance, while extending the durability of automobiles and laying the foundation for the development of new technologies.
A car inevitably vibrates due to natural aging, friction, abrasion, oxidation, deformation, etc. as it is used.Noise increases. For example, when parked for a long time under the hot sun in summer, the vehicle's interior temperature is close to 100°C, but at night it is below 20°C. Therefore, the temperature difference between a vehicle in the cold winter and a car in the open-air parking condition for a long time at night is the same in the summer. Parts due to these temperature differences routinely contract and expand, loosening the tightening of bolts or bonding of adhesives and loosening pins or clips. At the same time, the condensation of moisture and the repetition of medium feet lead to corrosion and deterioration. In addition, lubricating oil, hydraulic operating oil and coolant quality poor, deterioration and leakage, and inadequate fuel movement cause or promote vibration noise. For this reason, noise and vibration occur frequently over time and their intensity becomes greater and greater. Therefore, the purpose of the NVH standard level is to provide the criteria for various engine failures, chassis deformation and wear that occur in actual vehicles for the above reasons, thereby contributing to the suppression of excessive economic maintenance costs and rapid and accurate maintenance, while extending the durability of automobiles and laying the foundation for the development of new technologies.A car inevitably vibrates due to natural aging, friction, abrasion, oxidation, deformation, etc. as it is used.Noise increases. For example, when parked for a long time under the hot sun in summer, the vehicle's interior temperature is close to 100°C, but at night it is below 20°C. Therefore, the temperature difference between a vehicle in the cold winter and a car in the open-air parking condition for a long time at night is the same in the summer. Parts due to these temperature differences routinely contract and expand, loosening the tightening of bolts or bonding of adhesives and loosening pins or clips. At the same time, the condensation of moisture and the repetition of medium feet lead to corrosion and deterioration. In addition, lubricating oil, hydraulic operating oil and coolant quality poor, deterioration and leakage, and inadequate fuel movement cause or promote vibration noise. For this reason, noise and vibration occur frequently over time and their intensity becomes greater and greater. Therefore, the purpose of the NVH standard level is to provide the criteria for various engine failures, chassis deformation and wear that occur in actual vehicles for the above reasons, thereby contributing to the suppression of excessive economic maintenance costs and rapid and accurate maintenance, while extending the durability of automobiles and laying the foundation for the development of new technologies.
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