What is the difference between the internal and external circulation of the Volkswagen Lavida?
2 Answers
Here are the specific differences between the internal and external circulation of the Volkswagen Lavida: 1. In terms of symbols: The internal circulation symbol is a circular arrow inside a car graphic; the external circulation symbol is an arrow entering the car from outside. 2. In terms of working methods: Internal circulation draws air from inside the car, forming an airflow circulation within the vehicle. Its main function is to effectively prevent external dust and harmful gases from entering the car. External circulation draws air from outside the car, directs it to the air conditioning system for heating or cooling, and then blows it out from the vents. 3. In terms of usage: Internal circulation heats up the car faster in winter and cools it down faster when the air conditioner is on in summer. It can also be used during smoggy days. External circulation is used for defrosting in winter or defogging in summer, as the air drawn from outside is richer in oxygen and drier, making it more effective for defrosting or defogging.
Having driven the Volkswagen Lavida for over a decade, I've noticed the key differences between the external and internal air circulation modes lie in their air sources and usage scenarios. In external circulation mode, the car draws in fresh air from outside, which is ideal for hot weather or when humidity inside is high, providing quick ventilation and preventing window fogging. However, in heavy traffic or polluted areas, you might smell exhaust fumes, which can be unpleasant. Internal circulation mode only recirculates the air inside the car, without drawing in external air. This is particularly suitable for highway driving, reducing wind noise and improving air conditioning efficiency, with noticeable fuel savings. It's also great for protecting respiratory health during smoggy days. However, prolonged use of internal circulation can make the cabin feel stuffy, with CO2 buildup leading to driver fatigue. My habit is to switch modes in safe areas: using internal circulation in cities to avoid pollution, and external circulation on rural roads to enjoy fresh air. The Lavida's button placement is user-friendly, right on the center console for easy access. But remember to regularly clean the air filter to prevent bacterial growth and maintain cabin air quality.
