Method for operating a feed pump operating in a pulsating manner and motor vehicle having a feed pump

A method for operating a feed pump operating in a pulsating manner, the method comprising the following steps:

• providing the feed pump with a feed piston and a drive coil configured to drive the feed piston;
• i) applying a voltage profile to the drive coil;
• ii) carrying out a feed stroke of the feed piston in accordance with the voltage profile;
• iii) monitoring a temperature at the feed pump;
• and
• iv) adapting the voltage profile as a function of at least the temperature.

A motor vehicle, comprising:

• a tank for a liquid operating substance;
• a feed unit having a feed pump operating in a pulsating manner and being configured to feed an operating substance from said tank, said feed pump having a feed piston and a drive coil configured to drive said feed piston, said feed unit having a pressure sensor downstream of said feed pump in a feeding direction;
• and
• a control unit configured to operate said feed pump to carry out the following steps:
• a) apply a voltage profile to said drive coil;
• b) carry out a feed stroke of said feed piston in accordance with said voltage profile;
• c) monitor a pressure profile in said feeding direction downstream of said feed pump;
• d) evaluate said pressure profile;
• and
• e) adapt said voltage profile as a function of at least one characteristic property of said pressure profile.

A motor vehicle, comprising:

• a tank for a liquid operating substance;
• a feed unit having a feed pump operating in a pulsating manner and being configured to feed an operating substance from said tank, said feed pump having a feed piston and a drive coil configured to drive said feed piston;
• and
• a control unit configured to operate said feed pump to carry out the following steps:
• i) apply a voltage profile to said drive coil;
• ii) carry out a feed stroke of said feed piston in accordance with said voltage profile;
• iii) monitor a temperature at said feed unit;
• and
• iv) adapt said voltage profile as a function of at least the temperature.