The UP28e/UP28e+ vacuum pump is activated on demand to support the evacuation of the brake booster. It provides the necessary vacuum for the brake booster in situations when the internal combustion engine is unable to do so e.g., during the warm-up phase, at high altitudes or when using the air-conditioning system. The UP28e ensures stable and effective braking power at all times, while also contributing to CO2 reduction.
The UP28e is installed parallel to the main combustion engine and evacuates the brake booster.