The invention is directed to a motor vehicle vacuum pump (10), comprising - a pumping unit (24) with a rotatable pump rotor (26), - an electric motor (30) for driving the pump rotor (26), - a pressure sensor connector (38) for periodically receiving a difference-pressure parameter (PD) provided by a motor vehicle pressure sensor (18), and - a pump control unit (34) for controlling the electric motor (30) based on the difference-pressure parameter (PD), wherein the pump control unit (34) comprises a permanent-operation-prevention control module (40) which is configured to monitor the difference-pressure parameter (PD) and to switch off the electric motor (30) if the difference-pressure parameter (PD) remains within a defined tolerance interval (In) for a defined threshold time span (TT). The permanent-operation-prevention control module (40) according to the present invention reliably avoids an energy-wasting and wear-causing permanent operation of the electric motor (30) in case of a non-changing difference-pressure parameter (PD). This provides an efficient and reliable motor vehicle vacuum pump (10).
MOTOR VEHICLE VACUUM PUMP
KRAFTFAHRZEUG-VAKUUMPUMPE
POMPE À VIDE DE VÉHICULE AUTOMOBILE
2024-02-28
Patent
Elektronische Ressource
Englisch
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |