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A control apparatus for an internal combustion engine calculates a basic fuel injection amount or a basic ignition timing for an engine based on the air intake quantity into the cylinders of the engine. The air intake quantity is calculated based on the pressure within a cylinder of the engine at a

A control apparatus for an internal combustion engine calculates a basic fuel injection amount or a basic ignition timing for an engine based on the air intake quantity into the cylinders of the engine. The air intake quantity is calculated based on the pressure within a cylinder of the engine at a prescribed crankshaft angle. The fuel injection amount or the ignition timing is then controlled by feedback control so that a prescribed controlled variable, which is a function of the cylinder internal pressure, attains a target value.

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A control apparatus for an internal combustion engine comprising: a cylinder pressure sensor for measuring the internal pressure of a cylinder of the engine; air quantity calculating means for calculating the quantity of air in the cylinder based on the pressure measured by the cylinder pressure sen

A control apparatus for an internal combustion engine comprising: a cylinder pressure sensor for measuring the internal pressure of a cylinder of the engine; air quantity calculating means for calculating the quantity of air in the cylinder based on the pressure measured by the cylinder pressure sensor; fuel injection/ignition timing means for calculating at least one of a fuel injection amount and an ignition timing for the engine based on the calculated air quantity; controlled variable calculating means for calculating a controlled variable based on the pressure measured by the cylinder pressure sensor; and correcting means for correcting at least one of the fuel injection amount and the ignition timing so as to decrease the difference between the controlled variable and a target value.