Collision avoidance system in a vehicle

US8200420B2 · kind B2 · utility

Assignee

• VOLVO CAR CORPORATION · SE

Inventors

• Stefan Solyom · Olofstorp, SE
• Mattias Bengtsson · Lindome, SE

Key dates

• Filing date: Sep 10, 2009
• Grant date: Jun 12, 2012
• Expiry date: Jan 11, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G08G1/166
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method for determining the time to collision between a host vehicle and an oncoming target vehicle, and for determining the necessary host vehicle deceleration for bringing the host vehicle to a standstill at the moment of collision. The method furthermore comprises the steps: determining the position (pH) of the host vehicle as a function of time; determining the position (pT) of the target vehicle as a function of time; for the moment of collision, as a first condition, setting the position (pH) of the host vehicle equal to the position (pT) of the target vehicle, and, as a second condition, setting the velocity (vH) of the host vehicle to zero; using the positions and the conditions above to solve for the time to collision and the necessary host vehicle deceleration; and choosing the solution for time to collision that is positive and has the largest value.