Method and system for controlling an internal combustion engine

A system for controlling an internal combustion engine having a fuel accumulator and an actuator, comprising:

• a fuel-supply device coupled with the fuel accumulator and actuator, the fuel-supply device having, a low-pressure circuit, a high-pressure pump coupled on the inlet side to the low pressure circuit, wherein the pump has means for transporting fuel to a fuel accumulator, and a control valve for controlling a volumetric flow allocated to the high-pressure pump;
• and
• an electrically-connected control device interactively connected with the fuel-supply, actuator and fuel accumulator, comprising,
• sensors for detecting measured quantities in the fuel supply device, fuel accumulator, and the engine,
• means for determining an estimated value of the drive torque of the high-pressure pump depending on the fuel pressure determined in the sensors in the fuel accumulator,
• means for determining a loss torque depending on the estimated value for the drive torque of the high-pressure pump and additional loss-torque fractions, the loss-torque fractions being dependent on measurements from the sensors of an engine speed and additional operating variables,
• means for determining a target torque depending on the loss torque, and
• means for generating an actuating signal for controlling an actuator of the internal combustion engine depending on the target torque.

A system for controlling an internal combustion engine having a fuel accumulator and an actuator, comprising:

• a fuel-supply device coupled with the fuel accumulator and actuator, the fuel supply device having,
• a low-pressure circuit,
• a high-pressure pump coupled on the inlet side to the low-pressure circuit, wherein the pump has means for transporting the fuel to a fuel accumulator, and
• a control valve for controlling a volumetric flow allocated to the high-pressure pump;
• and
• a control device interactively connected with the fuel-supply, actuator and fuel accumulator, comprising,
• sensors for detecting measured quantities in the fuel supply device, fuel accumulator, and the engine,
• a control device wired to at least one of the sensors and configured to determine an estimated value of the drive torque of the high-pressure depending on the fuel pressure in the fuel accumulator,
• a regulator responsive to at least one sensor signal to selectively regulate the fuel pressure in the fuel accumulator based on at least one of the following:
• a regulation based on one of at least two different fuel pressure regulating modalities, and a regulation based on a combination of the at least two different fuel pressure regulating modalities, and wherein the estimated value of the drive torque of the high-pressure pump is adjusted based on the selected modality for regulating the fuel pressure in the accumulator;
• a control device wired to at least one of the sensors and configured to determine a loss torque depending on the estimated value for the drive torque of the high-pressure pump and additional loss-torque fractions, the loss-torque fractions being dependent on measurements from the sensors of an engine speed and additional operating variables,
• a control device wired to at least one of the sensors and configured to determine a target torque depending on the loss torque, and
• circuitry configured to generate an actuating signal for controlling an actuator of the internal combustion engine depending on the target torque.