Patent ID: 9630459
Date: 2017-04-25
CPC Classifications: B60C,B60W,G01L

Claim:
1. An apparatus for monitoring a tire pressure of a vehicle, comprising: a cornering force estimator configured to estimate a cornering force of a tire using a lateral acceleration and a yaw rate of the vehicle which are measured by a sensor installed in a vehicle dynamic control system, and a steering wheel angle which is measured by a sensor installed in a steering apparatus: a pneumatic trail calculator configured to calculate a pneumatic trail using the cornering force and a steering torque which is measured by a sensor installed in the steering apparatus; and a tire pressure checker configured to determine whether the tire pressure is insufficient based on the pneumatic trail calculated by the pneumatic trail calculator; and an output configured to output a warning informing of an insufficient tire pressure, wherein the pneumatic trail calculator calculates the pneumatic trail by using the cornering force, an aligning moment and a mechanical trail which is generated by a suspension geometry including a caster angle, and wherein the aligning moment is calculated by using the steering torque and a jacking torque which is determined by the suspension geometry.