Volvo Car Corporation

Rickard Nilsson

Mats Jonasson

Derong Yang

Mattias Brannstrom

Andreas Lindberg

Mikael Riikonen

Martin Idegren

David Silva Montemayor

Christoffer Modig

The present invention relates to a method for collision avoidance for a host vehicle, the method comprising: detecting a target in the vicinity of the vehicle; determining that the host vehicle is travelling on a collision course with the target; detecting a user initiated steering action for steering the vehicle towards one side of the target; determining a degree of understeering of the host vehicle; when the degree of understeering exceeds a first understeering threshold, controlling a steering control system of the vehicle to counteract the user initiated steering action to thereby reduce the degree of understeering. The invention further relates to an evasive steering system.

Method and system for collision avoidance

The present invention relates to a method for assisting a driver of a host vehicle in the event of a road departure. Collecting a set of drive parameter values, wherein each drive parameter is indicative of a present driving condition parameter for the vehicle. Calculating a collective road departure value based on the set of drive parameter values. When the road departure value exceeds a road departure threshold value, adapt at least one of the speed of the vehicle or the steering torque applied by the steering control system to the steerable wheels of the vehicle, until the road departure value is below the road departure threshold value.

Method and system for assisting a driver in the event of a road departure

A method for assisting a driver of a host vehicle in avoiding a collision, the method including: detecting a target in the vicinity of the vehicle; determining that the host vehicle is travelling on a collision course with the target; detecting a set of road markers on a side of the target; detecting a free space on the side of the road markers opposite the target side of the road markers, and when a collision with the target is predicted to occur within a predetermined time period and no driver initiated steering action for avoiding the collision course has been detected, providing a steering guidance to the driver of the host vehicle including altering of a steering wheel angular orientation for momentarily steering the host vehicle towards the road markers to indicate an evasive steering action to the driver.

Method and system for providing a steering guidance to a driver of a host vehicle

Method for controlling a vehicle, comprising: identifying an upcoming curve and determining its properties; determining current vehicle speed, v, estimating friction, &#x3bc;, between a tire of the vehicle and the road; estimating maximum allowable vehicle speed, v, when entering the curve based on the properties, speed and friction; if the current vehicle speed is higher than the estimated maximum allowable vehicle speed, determining that a friction measurement is required; if distance, d, between the vehicle and a curve entrance is higher than a predetermined threshold distance, d, and if a braking action is detected, performing a friction measurement during the braking action to determine current friction, &#x3bc;; if a distance between the vehicle and the curve entrance is lower than the predetermined threshold distance, performing a friction measurement to determine a current friction; and determining a maximum allowable vehicle speed vbased on the curve radius, speed and friction.

Method and system for controlling a vehicle tire-to-road friction estimation

There is provided a method for activating warning lights in a vehicle, the method comprising: determining a yaw rate of the vehicle; determining a sideslip angle of the vehicle; comparing the yaw rate to a predetermined yaw rate threshold value; comparing the sideslip angle to a predetermined sideslip angle threshold value; and f the yaw rate exceeds the predetermined yaw rate value; if the sideslip angle exceeds the predetermined sideslip angle value; and if it is determined that the vehicle reaches a standstill within a predetermined time after the yaw rate and sideslip values have been exceeded, activating warning lights of the vehicle. There is also provided a system configured to perform the above described method.

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Hisings-Karra, Sweden

Rickard Nilsson