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US 12,117,824 B2Granted
Methods of health degradation estimation and fault isolation for system health monitoring
AssigneeGarrett Transportation I Inc.
InventorsTomas Poloni, Paul Dickinson, Jaroslav Pekar
Life of this patent
Estimating the term…
Abstract
Methods and systems for fault identification and mitigation in an engine system. A state observer obtains current state information from the engine system, and a feature calculator uses data obtained from the state observer to calculate one or more feature indicators, which are monitored by a health estimator for the occurrence of a change using one or more change probability models. When the health estimator identifies a change, a fault isolator determines a component of the engine system that is subject to fault or health deterioration.
Claims19
A configurable controller for controlling a physical plant,
- the physical plant having each of:
- an engine with an intake manifold, combustion chamber receiving air from the intake manifold, and an exhaust manifold defining a first exhaust path and a second exhaust path allowing exhaust to exit the combustion chamber;
- an airflow system comprising a turbocharger having a compressor for providing compressed air to the intake manifold and a twin scroll turbine with a first scroll coupled to receive exhaust from the first exhaust path and a second scroll coupled to receive exhaust from the second exhaust path, with a balance valve controllably allowing airflow between the first and second exhaust paths;
- a plurality of actuators for controlling operation of the engine and airflow system, and a plurality of sensors for observing a plurality of characteristics of the engine and airflow system;
- the configurable controller comprising:
- a state observer configured to capture a current state of the physical plant by communication with the plurality of sensors;
- a feature calculator configured to receive current state data from the state observer and calculate at least one feature parameter reflecting a state of health of at least one of component of the physical plant, the at least one feature parameter including a first feature parameter related to a mass air flow, and a second feature parameter related to an exhaust manifold air pressure;
- and
- a fault isolator configured to identify a component of the physical plant that is subject to a fault or health degradation, and to generate a fault indicator indicating the identified fault, by identifying a balance valve fault if the second feature parameter has changed, but the first feature parameter has not changed.
6 more elements
An engine system comprising:
- an engine having an intake manifold and an exhaust manifold, with a combustion chamber therebetween into which a fuel quantity is provided;
- an airflow system coupled to the engine, the airflow system having a turbocharger including a compressor and a turbine, and an exhaust gas recirculation (EGR) valve, the turbine being a twin scroll turbine having first and second scrolls coupled to first and second exhaust flow paths and a balance valve between the first and second exhaust flow paths;
- an aftertreatment system including a Lambda sensor;
- and
- a configurable controller for controlling the engine, the airflow system, and the aftertreatment system, comprising:
- a state observer configured to capture the current state of the engine, airflow system, and aftertreatment system;
- a feature calculator configured to calculate a first feature parameter related to a mass air flow, and a second feature parameter related to an exhaust manifold air pressure using data received from the state observer;
- and
- a fault isolator configured to identify a system component that is subject to a fault using at least the first feature parameter and the second feature parameter by identifying a balance valve fault in response to a change in the second feature parameter without a change in the first feature parameter, and generate a fault indicator indicating the identified fault.
6 more elements
A method of operation in an engine system comprising:
- an engine having an intake manifold and an exhaust manifold, with a combustion chamber therebetween into which a fuel quantity is provided;
- an airflow system coupled to the engine, the airflow system having a turbocharger including a compressor and a turbine, and an exhaust gas recirculation (EGR) valve, the turbine being a twin scroll turbine having first and second scrolls coupled to first and second exhaust flow paths and a balance valve between the first and second exhaust flow paths;
- an aftertreatment system including a Lambda sensor;
- and
- a configurable controller for controlling the engine, the airflow system, and the aftertreatment system, the configurable controller including each of a state observer, a feature calculator, and a fault isolator, the method comprising:
- the state observer capturing a current state of the engine, airflow system, and aftertreatment system;
- the feature calculator calculating at least a first feature parameter related to a mass air flow, and a second feature parameter related to an exhaust manifold air pressure using data received from the state observer;
- and
- the fault isolator identifying a balance valve fault in response to a change in the second feature parameter without a change in the first feature parameter, and generating a fault indicator indicating the identified fault.
6 more elements
Dependencies are inferred from the claim text.