Method of controlling the operation of an air charging system of an internal combustion engine

Patent metadata

Field	Value
Publication number	US-10253704-B2
Application number	US-201514711382-A
Country	US
Kind code	B2
Filing date	May 13, 2015
Priority date	May 27, 2014
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

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.

First claim

What is claimed is:

1. A method of controlling the operation of an air charging system of an internal combustion engine comprising: providing a plurality of actuators in the air charging system, including a first actuator that controls intake air, a second actuator that controls exhaust gas recirculation flow and a third actuator that controls positioning of turbine vanes; determining an output parameter for each of the plurality of actuators in the air charging system; calculating, by an electronic control unit, an error between each one of the plurality of output parameters and a target value thereof; applying, by the electronic control unit, each one of the calculated errors to a separate one of a plurality of linear controllers to yield a virtual input from each one of the errors; calculating simultaneously, by a non-linear calculation module of the electronic control unit, a plurality of input parameters for the air charging system using the virtual inputs; determining, by the electronic control unit, a position for each actuator of the air charging system using a respective one of the input parameters in a mathematical model of the respective actuator; and operating, by the electronic control unit, the first second and third actuators according to the determined position thereof, including: controlling, via the electronic control unit, the first, second and third actuators together in coordination to reduce a time response within which the air charging system adheres to the target values; and simultaneously moving the first, second and third actuators; and setting each of the first, second and third actuators to its respective determined position; wherein each one of the virtual inputs is in a linear relation with only one of the output parameters; wherein the output parameters include an intake pressure, a residual gas fraction and an exhaust manifold pressure and comprising: maintaining constant, the target value for the intake pressure; maintaining constant, the target value for the residual gas fraction; and instantaneously varying the target value for the exhaust manifold pressure.

2. The method according to claim 1 , wherein the output parameters of the air charging system comprise a parameter indicative of an exhaust manifold pressure, a parameter indicative of an intake manifold pressure and a parameter indicative of an oxygen concentration in the intake manifold.

3. The method according to claim 2 , wherein the input parameters of the air charging system comprise a parameter indicative of an exhaust mass flow rate through the exhaust gas recirculation valve, a parameter indicative of an air mass flow rate through the air intake valve, and a parameter indicative of an exhaust mass flow rate through a turbine of the variable-geometry turbocharger.

4. The method according to claim 3 , wherein the input parameters are calculated simultaneously in the non-linear calculation module, with the following vector relation:

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Assignees

• Gm Global Tech Operations Llc

Inventors

• Conte Giuseppe
• Alfieri Vincenzo

Classifications

• F02D41/1446

  the characteristics being exhaust temperatures · CPC title

• F02D2200/0406

  Intake manifold pressure · CPC title

• F02D41/0072

  Estimating, calculating or determining the EGR rate, amount or flow (sensors in EGR systems F02M26/45) · CPC title

• F02D2041/1418

  Several control loops, either as alternatives or simultaneous · CPC title

• F02D41/0052

  Feedback control of engine parameters, e.g. for control of air/fuel ratio or intake air amount · CPC title