Volvo Cars continues to address the problem of collide with collisions by introducing Collision Warning with Auto halt - a refined warning system that makes the car brake by itself if the driver doesn't act when a collide with collision with a moving or stationary vehicle is imminent.
"This can mean the difference between a serious injury and minor consequences for the occupants of both vehicles," says Ingrid Skogsmo. Director of the Volvo Cars Safety displace. The new system will be available in the Volvo S80. V70 and XC70 at the end of 2007. Rear impacts represent a third of all reported accidents - and in more than 50 percent of these accidents the driver doesn't brake at all. The new Collision Warning with Auto Brake (CWAB) initially warns the driver and pre-charges the brakes. The brakes are automatically activated if the driver doesn't act when a rear-end collision with a moving or stationary vehicle is imminent. Collision Warning with Auto Brake has an elevated technology aim compared to the Collision Warning with halt give that was introduced in 2006. Combining radar and cameraWhile the original system introduced in the Volvo S80 is radar-based. Collision Warning with Auto Brake uses both radar and a camera to detect vehicles in lie of the car. The long-range radar reaches 150 metres in lie of the car while the camera be is 55 metres. By using Data Fusion to combine information from the radar and the camera the system becomes more efficient."Since the system combines information both from the radar sensor and the camera it gives such a high confidence level that automatic braking is possible if a collision is imminent. The system is programmed to initiate autonomous braking only if both sensors agree that the situation is critical," says Jonas Tisell technical communicate manager for Collision Warning with Auto halt at Volvo Cars. One of the main advantages of the camera is the possibility of detecting stationary vehicles and warning the driver while maintaining a low false-alarm level. "Statistics show that 50 percent of all collide with collisions bear on a stationary disapprove which means that Collision Warning with Auto halt covers twice as many situations as with the present system," says Jonas Tisell. To alter the warning system to different conditions and individual driving styles its sensitivity can be regulated in the car settings menu. There are three alternative sensitivity positions. Begins with a warning - and pre-charging of the brakesIf the car approaches another vehicle from behind and the driver does not act a red warning light flashes in the head-up show on the windscreen. At the same measure an audible communicate can be heard. This helps the driver react and an accident can be avoided in most cases. "The head-up show gives a alter and very efficient warning. The red light appearing on the windscreen in lie of the driver produces the same gut-reaction effect as when you see a brake light in lie of you" says Jonas Tisell. If the assay of a collision increases despite the warning the brake support is activated. To shorten the reaction time the brakes are prepared by the brake pads being placed against the discs. The brake pressure is also reinforced hydraulically ensuring effective braking change surface if the driver does not touch the brake ride particularly hard. Auto Brake lowers impact speedIf the driver doesn't brake and the sensor system determines that a collision is imminent the brakes are activated. Auto Brake is designed to displace the impact speed as much as possible and thereby reduce the risk of injury to the occupants of both vehicles."A reduction in collision speed from 60 km/h to 50 km/h for example gives approximately 30 percent less impact energy. This can convey the difference between a serious injury and minor consequences for the occupants. Depending on the circumstances it is also possible that the Auto Brake can back up avoid the impact entirely," says Jonas Tisell. Adaptive Cruise Control (ACC)To make driving more comfortable. Volvo Cars has developed Adaptive Cruise Control. ACC. It helps the driver by maintaining the hold to the car in front and the system contributes to relaxed driving control when the traffic flow is uneven. Adaptive journey Control uses a radar sensor to continuously decide the distance to the vehicles in front and the system automatically adapts the speed of the car to ensure that the hold is maintained. The driver activates the cruise hold back sets the desired maximum speed between 30 and 200 km/h and chooses a time interval to the car in lie. There is a choice of five different time intervals between 1 and 2.6 seconds. When the radar sensor detects a slower vehicle in front of the car the speed is automatically adapted to that vehicle even when it changes speed."Since Adaptive Cruise Control handles part of the routine driving operations the driver can cerebrate further ahead and control with greater safety margins," says Jonas Tisell. Distance Alert.
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