Behind this English name lies the traction control, which is standard on Vectra models with a displacement of 2.0 liters. Thanks to the traction control, the front wheels are not allowed to spin during acceleration, very strong acceleration or when cornering, but especially in the rain, on snow or ice. The car reliably holds the direction, the driving stability is noticeably improved. The traction control system receives its information from the wheel speed sensors of the anti-lock system of the front and rear axles. The TC system intervenes in both engine management and the braking system. There is always a certain difference between the speed of rotation of the front and rear wheels, because. drive wheels, even on dry roads, tend to slip more. If the speed deviation of the rear wheels and one of the front drive wheels is too large, its permissible limit is reached. Now the vehicle is activated: under the throttle valve, which is actuated by a cable, there is an additional throttle valve in the suction pipe. They are driven by a servomotor; and in the direction «closed», if there is a risk of slippage. Despite the full throttle position, the engine no longer receives the full amount of intake air, the torque is reduced, the wheels can again be securely gripped. At the signal of the control unit, the servomotor reacts within 60 ms. When accelerating quickly on a particularly slippery road surface (for example, icy), the vehicle control unit may further cause the ignition/injection control system to turn off the ignition and reduce the amount of fuel injected. Technical subtlety: if only one of the drive wheels slips, the ABS system applies targeted braking to the wheel with the higher speed. This improves traction, especially on roads with a rough surface on one side. While the wheel slip adjustment is working, a control light flashes on the dashboard. This serves as a warning signal to the driver, because, despite the TS, the laws of physics cannot be outwitted. Anyone who turns too fast in spite of the vehicle will end up in a ditch In certain driving situations, the vehicle system is deactivated by a key switch in the dashboard: when driving with snow chains or on long trips in deep snow, where slippage of the drive wheels is unavoidable and required also reliable overclocking. Even if the driver forgets to turn the system back on, the vehicle will be ready for operation the next time the engine is started.
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