High-pressure pump in a high-pressure injection system of a vehicle

A control device for a high-pressure injection system of a motor vehicle, the control device comprising:

• a processor programmed to apply a current to an electromagnet for actuating an inlet valve of a high-pressure pump of the high-pressure injection system depending on a rotation position signal of a motor shaft;
• the processor further programmed to apply a coil current to the electromagnet in a delivery phase of the high-pressure pump during and/or after overshooting of a top dead center of a piston of the high-pressure pump;
• the processor further programmed to detect a start time at which the coil current, on account of starting of an opening movement of the inlet valve, fulfills a predetermined change criterion;
• and
• the processor further programmed to ascertain a dead center rotation position of the motor shaft at which the piston is at the top dead center based on the ascertained start time and adjust an intensity of the coil current based on the ascertained dead center rotation position;
• wherein the predetermined change criterion comprises an increase in the intensity of the coil current averaged over a time span.

A motor vehicle comprising:

• an internal combustion engine with a combustion chamber;
• a high-pressure pump delivering fuel into the combustion chamber by movement of a piston;
• an inlet valve allowing or blocking delivery of fuel to the high-pressure pump;
• and
• a processor programmed to apply a current to an electromagnet for actuating the inlet valve based at least in part on a rotation position signal of a motor shaft;
• the processor further programmed to apply a coil current to the electromagnet in a delivery phase of the high-pressure pump during and/or after overshooting of a top dead center of a piston of the high-pressure pump;
• the processor further programmed to detect a start time at which the coil current, on account of starting of an opening movement of the inlet valve, fulfills a predetermined change criterion;
• and
• the processor further programmed to ascertain a dead center rotation position of the motor shaft at which the piston is at the top dead center based on the ascertained start time and adjust an intensity of the coil current based on the ascertained dead center rotation position;
• wherein the predetermined change criterion comprises an increase in the intensity of the coil current averaged over a time span.