In the event of danger
The new Tourismo

In the event of danger

Before an accident, valuable seconds slip by in which the danger could possibly still be averted. In the Tourismo, the ESP® and BAS sensors detect critical driving situations such as strong oversteer or understeer, critical steering movements, panic and emergency braking at an early stage. 

Increased driving safety is also offered by the directional stability of the chassis and the calm steering. This is achieved by the independent suspension on the front axle. 

Regardless of the Adaptive Cruise Control (ART) function, Active Brake Assist 4 (ABA 4) warns the driver prior to a collision with an obstacle and independently brakes the coach. To this end, the radar-controlled system constantly scans an area of up to 250 metres of the lane in front of the coach.

As the world’s first system of its kind, ABA 4 also reacts to pedestrians. Therefore, in addition to moving vehicles and stationary obstacles ahead (e.g. the tail-end of a traffic jam), the system also detects pedestrians within 80 metres. For example, should the distance to pedestrians be dangerously reduced, the system alerts the driver by means of visual and acoustic warning signals, while initiating partial braking through to a standstill if the driver does not respond. The partial braking provides the driver with the possibility of avoiding the collision by means of a full braking or steering maneuver. Additionally, he can warn endangered pedestrians in time using the vehicle’s horn.

The autonomous intelligent cruise control* system (ART) relieves the burden on the driver on arterial routes and motorways. If ART detects a slower-moving vehicle ahead, it automatically decelerates the coach until a distance preselected by the driver is reached. ART then constantly maintains this distance. For this purpose, a distance sensor scans the surroundings in front of the bus every 50 milliseconds. It uses three radar beams to measure the distance and relative speed of vehicles ahead up to a maximum distance of 200 m.

ART measures the relative speed with an accuracy of 0.7 km/h. If no vehicle is detected ahead, it operates like a cruise control. Autonomous intelligent cruise control assists the driver, especially in medium to heavy traffic on main roads, and largely eliminates the need for adaptive braking. Deceleration is limited to approx. 20% of the maximum braking force.

The distance set via ART is speed-dependent and can be specified as a percentage ratio of the speedometer reading. In the default setting, for example, ART sets a distance of about 60 % of the speedometer reading difference. From this setting, the driver can adjust the desired distance upwards or downwards in defined steps

The heart of ART is a distance radar mounted in the centre of the vehicle. It constantly switches back and forth between the three radar beams. These are emitted by the system and are directed such that the lanes are monitored to the left, right and centre in the direction of travel.

The Electronic Stability Program (ESP®) is an active system for increasing driving safety and stability. It makes a noticeable contribution to reducing the risk of skidding during cornering or evasive manoeuvres. This is achieved by specifically controlling the braking forces on each individual wheel in critical, dynamic driving situations, for example if the coach approaches physical limits when cornering. At the same time, the engine output is reduced. A possible "breaking-out" of the coach is thus prevented by the finely metered braking within the limits of the physical possibilities.

Among other things, ESP® monitors the lateral acceleration of the bus. If, on long bends – such as motorway exits – or with rapid lane changes, the bus reaches a critical driving situation, the vehicle speed is automatically reduced so the bus returns to a situation of driving stability. ESP® is comparable with the system installed in cars but provides additional functions adapted for use in buses. 

In case of imminent danger, the correct reaction of the driver is just as important as the technical equipment of the vehicle. OMNIplus safety training courses provide the ideal basis. They focus among other things on practical familiarity with the behaviour of the vehicle in critical situations. 

* Optional equipment