Patent ID: 7962270

Claim:
A method of controlling a pressure-medium pump in a motor vehicle, the method comprising the steps of: activating the pressure-medium pump in order to increase a pressure in an associated pressure accumulator when the pressure in the associated pressure accumulator falls below a lower pressure threshold value, switching off the pressure-medium pump when the pressure in the associated pressure accumulator is greater than an upper pressure threshold value (P_O), in an event of a drop of the pressure in the associated pressure accumulator, activating the pressure-medium pump when the pressure in the associated pressure accumulator falls below a first lower pressure limit value (P_U 1 ), during a first operating phase of the vehicle, and activating the pressure-medium pump when the pressure in the associated pressure accumulator falls below a different second lower pressure limit value (P_U 2 ), during a second operating phase of the vehicle operating the pressure-medium pump, after starting the vehicle, until the upper pressure threshold value (P_O) is reached in the associated pressure accumulator; defining the second lower pressure limit value (P_U 2 ) as being higher than the first lower pressure limit value (P_U 1 ); and utilizing the second lower pressure limit value (P_U 2 ), during one of a braking phase and a trailing throttle phase, for increasing the pressure in the associated accumulator while utilizing the first lower pressure limit value (P_U 1 ), during a traction operating phase, for increasing the pressure in the associated accumulator.