What does Volkswagen's indirect tire pressure monitoring mean?
2 Answers
Volkswagen's indirect tire pressure monitoring uses the wheel speed sensors of the car's ABS system to compare the rotational speed differences between tires for monitoring tire pressure. Below is relevant information: 1. Working principle: The tire pressure monitoring system utilizes the sensing function of ABS to compare the rotation counts of tires. Insufficient tire pressure shortens the tire's circumference, causing the rotation count to differ from other tires during driving. 2. Tire pressure warning: The tire pressure monitoring alerts based on speed comparison by wheel speed sensors. Tire pressure can be checked with a pressure gauge. During driving, the tire pressure loss display monitors the inflation pressure of tires. If the inflation pressure in a tire is significantly lower than others, the system will issue a warning. When the internal tire pressure decreases, the working radius of the wheel changes accordingly, altering the wheel's rotational speed.
As an automotive technology enthusiast, I'd like to share what Volkswagen's indirect tire pressure monitoring means. Unlike direct measurement systems that have sensors installed inside the tires, it uses the vehicle's ABS (Anti-lock Braking System) to indirectly monitor tire pressure changes. Simply put, ABS sensors track the rotation speed of each wheel - during normal highway driving, the speeds should be roughly equal. When a tire's pressure drops, its rolling radius decreases, causing it to rotate slightly faster than the others. The system detects this difference and triggers a warning light on the dashboard to alert you about potential air loss. This system is common in Volkswagen vehicles. Its advantages include lower costs and less maintenance since you don't need to replace batteries or deal with additional sensors. The downside is its lack of precision - it only alerts when pressure loss exceeds about 25%, and it's prone to false alarms during turns or on uneven roads. I think it's acceptable for daily driving, but it's best to manually check tire inflation during each refueling to ensure safety.
