Method and system for controlling the amount of fuel in connection to operating an internal combustion engine

摘要

The present invention relates to a method for controlling the amount of fuel in connection to operating an internal combustion engine based upon engine boost pressure and engine operational conditions using a map function. The engine operational conditions comprise engine speed and ambient air pressure. The method comprises the steps of: for low and/or negative engine boost pressures using (120) a map function (M) specifying torque values so as to determine an available torque based upon an exhaust gas smoke limit taking driveability into account; and determining (170) a maximum allowable fuel amount based upon said determined available torque considering losses and combustion efficiency.The present invention also relates to a system for controlling the amount of fuel in connection to operating an internal combustion engine based upon engine boost pressure and engine operational conditions using a map function. The present invention also relates to a vehicle. The present invention also relates to a computer program and a computer program product.