초록 ▼

A method and system for determining and controlling the fuel mass to be delivered to an individual cylinder of an internal combustion engine during engine transients compensates for fuel transport dynamics and the actual fuel injected into the cylinder. A plurality of engine parameters are sensed, i

A method and system for determining and controlling the fuel mass to be delivered to an individual cylinder of an internal combustion engine during engine transients compensates for fuel transport dynamics and the actual fuel injected into the cylinder. A plurality of engine parameters are sensed, including cylinder air charge. An initial base desired fuel mass is determined based on the plurality of engine parameters. An initial transient fuel mass is also determined based on prior injection history for that cylinder. A desired injected fuel mass to be delivered to the cylinder is determined based on the initial base desired fuel mass and the initial transient fuel mass. These same calculations are then used to compensate for changes to the base desired fuel mass while the fuel injection is in progress, resulting in an updated desired injected fuel mass. Finally, the injection history for that cylinder is updated to account for the actual desired fuel mass delivered to the cylinder.

대표청구항 ▼

[ What is claimed is:] [1.] A method for determining fuel mass to be delivered to an individual cylinder of an internal combustion engine during transient engine conditions, the individual cylinder having an intake port for regulating entry of the fuel into the cylinder and having a prior injection

[ What is claimed is:] [1.] A method for determining fuel mass to be delivered to an individual cylinder of an internal combustion engine during transient engine conditions, the individual cylinder having an intake port for regulating entry of the fuel into the cylinder and having a prior injection history indicating a mass of fuel previously delivered to the individual cylinder, the method comprising:sensing a plurality of engine parameters;determining an initial base desired fuel mass based on the plurality of engine parameters;determining an initial transient fuel mass based on the prior injection history;determining a desired injected fuel mass to be delivered to the individual cylinder based on the initial base desired fuel mass and the initial transient fuel mass; andsensing delivery of the desired injected fuel mass to the individual cylinder and determining an updated prior injection history based on the desired injected fuel mass and the prior injection history.