Abstract:
A method and apparatus is disclosed to control the operation of an air charging system of an internal combustion engine. A plurality of output parameters of the air charging system are monitored. An error is calculated between the monitored output parameters and a target value thereof. The calculated errors are applied to a linear controller that yields a virtual input used to calculate a plurality of input parameters for the air charging system. The input parameters is used to determine the position of a corresponding actuator of the air charging system for operating the actuators according to the determined position thereof. The inputs parameters are calculated with a non-linear mathematical model of the air charging system configured such that the virtual inputs are in a linear relation with only one of the output parameters and vice versa.
Abstract:
A method is disclosed for controlling an injector for injecting a reductant into a selective catalytic reduction system of an internal combustion engine. A value of a concentration of nitrogen-oxides in the exhaust gas aftertreatment system downstream of the selective catalytic reduction system is measured, and a first difference is calculated between the measured value of the nitrogen-oxides concentration and a predetermined reference value thereof. A value of a concentration of ammonia in the exhaust gas aftertreatment system downstream of the selective catalytic reduction system is measured, and a second difference is calculated between the measured value of the ammonia concentration and a predetermined reference value thereof. A quantity of reductant to be injected by the injector is calculated as a function of the calculated first difference and second difference, and the injector is operated to inject the calculated quantity of reductant.
Abstract:
A method of controlling the operation of an air charging system is disclosed. A plurality of output parameters of the air charging system are monitored. An error between each one of the monitored output parameters and a target value thereof is calculated. Each one of the calculated errors is applied to a linear controller that yields a virtual input which is used to calculate a plurality of input parameters for the air charging system. Each one of the input parameters is used to determine the position of a corresponding actuator of the air charging system and operate of the actuators according to the determined position thereof. The inputs parameters are calculated with a non-linear mathematical model of the air charging system configured such that each one of the virtual inputs is in a linear relation with only one of the output parameters.
Abstract:
Methods and systems are provided for controlling a fuel injector included in a fuel injection system of an engine of a vehicle. A method includes receiving vehicle sensor data that is indicative of air measurement data and engine sensor measurement data. A combustion model is used to estimate, through an iterative approach, a total fuel amount for satisfying a torque request and to estimate start of injection degree based upon the received vehicle sensor data. The estimated total fuel amount and the start of injection degree are outputted for controlling the fuel injector.
Abstract:
Methods and systems are provided for controlling the operation of an air charging system of an internal combustion engine. A plurality of actuators include an electric motor of an air compressor. Output parameters of the air charging system are monitored by a plurality of sensors. An error between each one of the output parameters and a target value thereof is calculated by a processor. The calculated errors are applied to linear controllers that yield virtual inputs. Input parameters for the air charging system are calculated using the virtual inputs. The input parameters affect all of the output parameters. The input parameters are calculated with a non-linear mathematical model of the air charging system, configured such that each one of the virtual inputs is in a linear relation with only one of the output parameters. The actuators are operated using the input parameters.