Method for the load-dependent opening and closing of a blow-off valve flap of an internal combustion engine with a turbocharger

A device for checking and at least one of setting and adjusting a degree of opening of a blow-off valve flap, the device comprising:

• an internal combustion engine with a turbocharger;
• a selected mode of operation, the selected mode comprising one of a sport mode, a normal mode and a fuel economy mode;
• a blow-off valve, arranged between an exhaust line of the internal combustion engine and a discharge line of a turbine of the turbocharger, with a blow-off valve actuator for adjusting a degree of opening of the blow-off valve flap;
• a detector that detects the degree of opening of the blow-off valve flap;
• and
• a control device for adjusting the degree of opening of the blow-off valve flap,
• wherein the control device adjusts the blow-off valve to a closed position based on the selected mode of the sport mode, the control device adjusts the blow-off valve to a partially open position based on the selected mode of the fuel economy mode and the control device determines a position for the blow-off valve in the selected mode of the normal mode based on engine load.

A non-transitory computer program product for load-dependent opening of a blow-off valve flap of an internal combustion engine with a turbocharger, comprising:

• a tangible storage system readable by a processor and storing executable instructions for execution by the processor for performing a method comprising:
• receiving an operation mode, including one of a sport mode, a normal mode and a fuel economy mode;
• generating, by a control device, a control input for a blow-off valve actuator to move the blow-off valve to a closed position based on the received mode of the sport mode;
• generating, by the control device, the control input to move the blow-off valve actuator to a partially open position based on the received mode of the fuel economy mode;
• receiving the normal mode, and generating, by the control device, the control input for the blow-off valve actuator to move the blow-off valve to a degree of opening based on a current load;
• transmitting the control input to the blow-off valve actuator;
• wherein the step of determining the current load of the internal combustion engine further includes:
• detecting an opening position of a valve upstream of a provision chamber, an air pressure value, and an air mass flow value with at least one detector on an inlet side of the internal combustion engine and calculating the current load based on the opening position of the valve, the air pressure value, and the mass flow value having been detected;
• wherein in the normal mode, the control input is configured to move the blow-off valve flap to the degree of opening, the degree of opening comprising valve positions of which comprises one of completely open, partially open, minimally open and closed.