A method for torque control of an internal combustion engine includes a pressure sensor that is associated with at least one, but at the most two cylinders of the internal combustion engine, whereby an cylinder internal pressure for the cylinder associated with the pressure sensor is detected. The method carries out an adjustment of injection characteristics for the injectors allocated to the individual cylinders of the internal combustion engine by way of a method which is independent from the detected cylinder pressure. A torque control for the internal combustion engine is performed based on the detected cylinder pressure.

An engine management apparatus for a vehicle. The apparatus comprises a fuel ratio controller arranged to control the air to fuel ratio of a fuel mixture for the vehicle's engine; a power demand sensor arranged to sense power demands made of the engine; and an engine controller configured to increase the air to fuel ratio from a first selected value to a second selected value in the event that the rate of vehicle speed change is less than a first threshold and the demand is less than a second threshold.

A controller for a hydrogen engine that includes an in-cylinder pressure sensor and an air-fuel ratio sensor includes processing circuitry. The processing circuitry is configured to execute a process that calculates a fluctuation amount of a combustion pressure based on an output of the in-cylinder pressure sensor and a process that calculates a correction amount based on the fluctuation amount. The correction amount is used to correct a rich deviation of an output of the air-fuel ratio sensor due to unburned hydrogen in exhaust gas.

An internal combustion engine control apparatus includes a cylinder pressure sensor, a driving condition detector, a reference crank angle setter, a reference cylinder pressure calculator, an air-fuel ratio estimator, and a controller. The cylinder pressure sensor detects a cylinder pressure. The driving condition detector detects a driving condition in an engine. The reference crank angle setter calculates a reference crank angle immediately before which an air-fuel mixture starts combusting in accordance with the driving condition. The reference cylinder pressure calculator calculates a reference cylinder pressure in the cylinder at the reference crank angle based on temperature characteristics of a specific-heat ratio of the air-fuel mixture under a condition. The air-fuel ratio estimator calculates an air-fuel ratio based on a pressure difference between the reference cylinder pressure and the cylinder pressure at the reference crank angle. The controller controls the engine in accordance with the air-fuel ratio.

An internal-combustion-engine control apparatus configured to control an internal combustion engine includes an exhaust gas recirculation processor and a catalyst neutralization processor. The exhaust gas recirculation processor is configured to control an exhaust gas recirculator, based on an operating state of the internal combustion engine. The catalyst neutralization processor is configured to: determine whether an oxygen concentration detected by an oxygen sensor is greater than or equal to a predetermined first threshold; and execute, when the oxygen concentration detected by the oxygen sensor is greater than or equal to the predetermined first threshold, catalyst neutralization processing in which fuel injection into the internal combustion engine is executed in a fuel-rich atmosphere having a richer air-fuel ratio than a stoichiometric air-fuel ratio to thereby consume at least a part of oxygen stored in a catalyst.