Traction Control System (Opel Vectra B)

Behind this English name lies the traction control system, which is standard in the Vectra models with a displacement of 2.0 liters. Thanks to the traction control, the front wheels are prevented from slipping when accelerating, accelerating very hard or when cornering, but especially in the rain, on snow or ice. The car holds its direction reliably, and 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 the front and rear wheels, since the drive wheels tend to slip more even on dry roads. If the speed of the rear wheels and one of the front drive wheels deviates too much, its permissible limit is reached. Now the TC is activated: an additional throttle valve is located in the intake pipe under the throttle valve, which is actuated by a cable. They are driven by a servomotor; in the "closed" direction if there is a risk of slipping. Despite the full throttle position, the engine no longer receives the full amount of intake air, the torque is reduced, the wheels can again reliably grip. The servomotor reacts to the signal from the control unit within 60 ms. During rapid acceleration on a particularly slippery road surface (for example, icy), the vehicle control unit can additionally induce the ignition/injection control system to switch off the ignition and reduce the amount of fuel injected. Technical detail: if only one of the drive wheels slips, the ABS system specifically applies the brakes to the wheel at a higher speed. This improves traction, especially on roads with a rough surface on one side. While the wheel slip control is in operation, a control lamp flashes in the instrument cluster. This serves as a warning signal for the driver, since, despite the vehicle, the laws of physics cannot be outwitted. Anyone who takes a turn at too high a speed, despite the vehicle, will end up in a ditch. In certain driving situations, the TS system is switched off using a key switch in the instrument cluster: when driving with snow chains or on long journeys in deep snow, where slippage of the drive wheels is inevitable and reliable acceleration is also required. Even if the driver forgets to turn the system back on, the vehicle will be ready to operate the next time the engine is started.

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