Method for operating an internal combustion engine

A method for operating an internal combustion engine including an engine of a motor vehicle, wherein fuel is injected directly into a combustion chamber delimited by a piston in a first operating mode during a compression phase and in a second operating mode during an induction phase;

• and, wherein fuel injected into the combustion chamber is ignited;
• the method comprising the steps of:
• determining a first interrupt angle (W1) dependent upon the pressure applied to the fuel to be injected and dependent upon the pressure in the combustion chamber;
• determining a second interrupt angle (W2) for the injection, said second interrupt angle (W2) being dependent upon the ignition angle (ZW);
• comparing the earlier one of said first and second interrupt angles (W1, W2) to the current rotational angle (KW_act) of the crankshaft;
• and,
• wherein said first interrupt angle (W1) for the injection is composed of the rotational angle (W_p) of said crankshaft at which the pressure in the combustion chamber is equal to or greater than the pressure (rail pressure) applied to the fuel to be injected and a safety interval (D_W_p).

An electric control medium including a read-only-memory, for a control apparatus of an internal combustion engine including an engine of a motor vehicle, the electric control medium comprising a program stored thereon which is run on a computing apparatus including on a microprocessor, and the program being suitable for carrying out a method having the steps of:

• determining a first interrupt angle (W1) dependent upon the pressure applied to the fuel to be injected and dependent upon the pressure in the combustion chamber;
• determining a second interrupt angle (W2) for the injection, said second interrupt angle (W2) being dependent upon the ignition angle (ZW);
• and,
• comparing the earlier one of said first and second interrupt angles (W1, W2) to the current rotational angle (KW_act) of the crankshaft.

An internal combustion engine including an engine for a motor vehicle, the internal combustion engine comprising:

• an injection valve with which fuel can be injected directly into a combustion chamber delimited by a piston in a first operating mode during a compression phase and in second operating mode during an induction phase;
• a spark plug with which the fuel injected into the combustion chamber is ignited;
• a control apparatus with which the injection valve and the spark plug are controlled;
• and,
• said control apparatus including:
• means for determining a first interrupt angle (W1) dependent upon the pressure applied to the fuel to be injected and dependent upon the pressure in the combustion chamber;
• means for determining a second interrupt angle (W2) for the injection, said second interrupt angle (W2) being dependent upon the ignition angle (ZW);
• and, means for comparing the earlier one of said first and second interrupt angles (W1, W2) to the current rotational angle (KW_act) of the crankshaft.