The invention is directed to a motor vehicle vacuum pump (10), comprising a pumping unit (24) with a rotatable pump rotor (26), an electronically commutated electric motor (30) for driving the pump rotor (26), a pressure sensor connector (38) for periodically receiving a pressure parameter (P) provided by a motor vehicle pressure sensor (18), and a pump control unit (34) for controlling a variable rotational motor speed (MS) of the electric motor (30), the pump control unit (34) comprising - a standard-operation control module (40) which is configured to control the variable rotational motor speed (MS) within a standard-operation speed range (SSR), - a boost-drive control module (42) which is configured to overrule the standard-operation control module (40) if being triggered and to set the variable rotational motor speed (MS) corresponding to a boost speed value (BS1,BS2,BSn) which is higher than the standard-operation speed range (SSR), - a safety control module (44) which is configured to monitor the pressure parameter (P) and to trigger the boost-drive control module (42) based on the pressure parameter (P). The pump control unit (34) according to the present invention allows to generally design the motor vehicle vacuum pump (10) for the relative low standard-operation speed range (SSR) but also allows to temporarily provide a boosted pump performance in critical situations. This provides a reliable and also cost-efficient motor vehicle vacuum pump (10).
MOTOR VEHICLE VACUUM PUMP
KRAFTFAHRZEUG-VAKUUMPUMPE
POMPE À VIDE DE VÉHICULE AUTOMOBILE
2024-02-28
Patent
Electronic Resource
English