Method and system for engine air system control
AssigneeCaterpillar Inc.
InventorSylvain J. Charbonnel
Life of this patent
Estimating the term…
Abstract
In one aspect, a method for controlling an internal combustion engine system including an intake valve, an exhaust gas recirculation (EGR) valve, and a variable-geometry turbocharger (VGT) includes receiving sensor information including information indicative of a condition of air supplied to an internal combustion engine and a condition of exhaust exiting the internal combustion engine. The method also includes receiving a request for an internal combustion engine, projecting a future behavior of the request, and based on the request and the projected future behavior of the request, generating commands for actuating the intake valve, the EGR valve, and the VGT.
Claims19
A method for controlling an internal combustion engine system including an intake valve, an exhaust gas recirculation (EGR) valve, and a variable-geometry turbocharger (VGT), the method comprising:
- receiving sensor information including information indicative of a condition of air supplied to an internal combustion engine with an intake manifold and a condition of exhaust exiting the internal combustion engine;
- receiving a request for an internal combustion engine associated with the intake manifold;
- projecting a future behavior of the request associated with the intake manifold;
- and
- based on the request associated with the intake manifold and the projected future behavior of the request, generating commands for actuating the intake valve, the EGR valve, and the VGT with an unconstrained model predictive controller that employs one or more soft constraints, but does not use hard constraints.
A method for controlling an internal combustion engine system including an intake valve, an exhaust gas recirculation (EGR) valve, and a variable-geometry turbocharger (VGT), the method comprising:
- receiving sensor information including information indicative of a condition of air supplied to the internal combustion engine and a condition of exhaust exiting the internal combustion engine;
- receiving, by an intake air and exhaust system controller, a request for an internal combustion engine, the request being associated with air supplied to the internal combustion engine and exhaust generated by the internal combustion engine;
- projecting a future behavior of the internal combustion engine system with a predictive controller;
- estimating a disturbance of the internal combustion engine system that is not directly measured with a sensor of the internal combustion engine system, the estimated disturbance representing a difference between a measured state and a modeled state;
- and
- based on the request, the estimated disturbance, and the projected future behavior of the internal combustion engine system, generating a command to a secondary controller to actuate at least one of the intake valve, the EGR valve, and the VGT.
A control system for an internal combustion engine system, comprising:
- an intake throttle valve (ITV);
- an exhaust gas recirculation (EGR) valve;
- a variable-geometry turbocharger (VGT);
- an intake air sensor configured to generate a first signal indicative of a condition of air supplied to an internal combustion engine;
- an exhaust sensor configured to generate a second signal indicative of a condition of exhaust exiting the internal combustion engine;
- and
- an intake air and exhaust system controller configured to:
- determine the condition of air supplied to the internal combustion engine and the condition of the exhaust exiting the internal combustion engine based on the first and second signals,
- receive a request for an output from an internal combustion engine,
- project a future behavior of the request, and
- generate commands to actuate the 1W, the EGR valve, and the VGT based on the request and the projected future behavior of the request,
- wherein the intake air and exhaust system controller is an unconstrained model predictive controller that employs one or more soft constraints, but does not use hard constraints.
Dependencies are inferred from the claim text.