How a Vehicle Dynamically Adjusts Tire Pressure Based on Driving

This patent describes a system and method for automatically adjusting a vehicle's tire pressure based on current driving conditions, using wheel-mounted inflators connected to a central computer.

What it covers

The patent describes a method for managing tire inflation that involves first determining a target tire pressure, called a 'setpoint,' based on the vehicle's current 'driving context.' This driving context could include factors like speed, load, road conditions, or even weather. Once the setpoint is determined, the system then controls an inflator to adjust the tire pressure to match this setpoint. The patent also describes a system that includes a remote computing system and several 'wheel-end inflators' — devices mounted directly to each wheel that can inflate or deflate the tire. These wheel-end inflators communicate with the remote computing system, often through a local 'gateway' device in the vehicle. For example, if a truck is driving on a highway, the system might set a higher pressure for better fuel economy, but if it then goes off-road, the system could automatically lower the pressure for better traction.

What it doesn't cover

• —Does not cover systems that only monitor tire pressure and alert the driver, without actively adjusting the pressure.
• —Does not cover manual tire inflation using an external pump or fixed-pressure systems that do not adapt to driving conditions.
• —Does not cover systems where tire pressure is adjusted to a single, static setpoint regardless of the vehicle's driving context.
• —Does not cover tire inflation systems that do not utilize 'wheel-end inflators' mounted directly to the vehicle's wheels.
• —Does not cover systems that lack a 'remote computing system' or a local 'gateway' for managing the inflators.

The clever bit

The core innovation is the ability to automatically determine an optimal tire pressure 'setpoint' based on the specific 'driving context' and then actively control inflators to achieve that pressure. This goes beyond simple monitoring or fixed-pressure systems, offering real-time, adaptive performance.

Why it matters

Dynamically adjusting tire pressure can significantly improve vehicle safety by optimizing grip and stability for different conditions. It can also lead to better fuel efficiency by reducing rolling resistance on highways and extend tire lifespan by ensuring optimal contact with the road. This technology is particularly relevant for commercial vehicles and off-road applications where driving contexts change frequently.

Real-world examples

• 1.Central Tire Inflation Systems (CTIS) on military vehicles
• 2.Some heavy-duty commercial trucks and buses
• 3.Off-road vehicles with on-board air compressors and controls
• 4.Future passenger vehicles with advanced tire management