High pressure egr flow model hybrid strategy
AssigneeGM Global Technology Operations LLC
InventorsNicola Totaro, Andrea Dutto, Giorgio Sticchi
Life of this patent
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Abstract
A method to control an internal combustion engine including exhaust gas recirculation (EGR) system and an air charging system includes the following steps: (a) determining, via an engine controller, a first EGR mass flow rate using an orifice model; (b) determining, via the engine controller, a second EGR mass flow rate using a cylinder volumetric efficiency model; (c) determining, via the engine controller, a hybrid EGR mass flow rate based on the first EGR flow rate and the second EGR flow rate; and (d) controlling the air charging system based on the hybrid EGR flow rate.
Claims20
A method to control an internal combustion engine including exhaust gas recirculation (EGR) system and an air charging system, comprising:
- determining, via an engine controller, a first EGR mass flow rate using an orifice model;
- determining, via the engine controller, a second EGR mass flow rate using a cylinder volumetric efficiency model;
- determining, via the engine controller, a hybrid EGR mass flow rate based on the first EGR flow rate and the second EGR flow rate;
- and
- controlling the air charging system based on the hybrid EGR flow rate.
An internal combustion engine, comprising:
- an engine block defining a plurality of cylinders;
- an air charging system in fluid communication with the plurality of cylinders, wherein the air charging system includes a throttle valve;
- an exhaust gas recirculation (EGR) system in fluid communication with the air charging system;
- and
- an engine controller in electronic communication with the throttle valve, wherein the engine controller is programmed to:
- determine a first EGR mass flow rate using an orifice model;
- determine a second EGR mass flow rate using a cylinder volumetric efficiency model;
- determine a hybrid EGR mass flow rate based on the first EGR flow rate and the second EGR flow rate;
- and
- control the throttle valve of the air charging system based on the hybrid EGR flow rate.
Dependencies are inferred from the claim text.