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US 11,421,616 B2Granted
Online monitoring and diagnostics in vehicle powertrains
AssigneeGarrett Transportation I Inc.
InventorsTomas Poloni, Jaroslav Pekar, Paul Dickinson
Life of this patent
Estimating the term…
Abstract
Methods and systems for calculating a plurality of aging factors in a system operating an engine. The calculated aging factors may include one or more of fuel injector drift, exhaust gas recirculation valve obstruction, and mass air flow sensor bias. Mass flow throughout the system, and pressures and temperatures within the system, are observed in an approach that relies on mass preservation concepts to estimate drift, obstruction and bias estimates.
Claims20
A system comprising:
- an engine comprising at least one cylinder, at least one fuel injector, an intake manifold and an exhaust manifold, wherein the at least one fuel injector is configured to inject a quantity of fuel to the cylinder, subject to fuel injector drift;
- an air intake comprising a mass air flow (MAF) sensor having an inlet and an outlet that generates a MAF sensor output subject to MAF sensor bias;
- a fuel-air mix (FAM) sensor having a FAM sensor output;
- a throttle positioned between the air intake and the engine intake manifold;
- an ambient pressure sensor and an ambient temperature sensor each having an output;
- an intake manifold (IM) pressure sensor and an IM temperature sensor configured to sense pressure and temperature respectively at the intake manifold;
- a system monitor configured to calculate each of the following using a model and the ambient pressure sensor and ambient temperature sensor outputs:
- a first pressure and a first temperature downstream of the MAF sensor;
- a second pressure and a second temperature at the exhaust manifold;
- a third pressure and a third temperature at the FAM sensor;
- a controller configured to calculate each of fuel injector drift and MAF sensor bias using the IM pressure and IM temperature, the MAF sensor output, the FAM sensor output, the fuel injector output, the first, second and third pressures, and the first, second, and third temperatures.
8 more elements
A method of operation in an engine system:
- wherein the engine system includes:
- an engine having at least one cylinder, at least one fuel injector, an intake manifold and an exhaust manifold, wherein the at least one fuel injector is configured to inject a quantity of fuel to the cylinder, subject to fuel injector drift;
- an air intake comprising a mass air flow (MAF) sensor having an inlet and an outlet that generates a MAF sensor output subject to MAF sensor bias;
- a fuel-air mix (FAM) sensor having a FAM sensor output;
- a throttle positioned between the air intake and the engine intake manifold;
- an ambient pressure sensor and an ambient temperature sensor each having an output;
- an intake manifold (IM) pressure sensor and an IM temperature sensor configured to sense pressure and temperature respectively at the intake manifold;
- wherein the method of operation comprises:
- calculating each of the following using a model and the ambient pressure sensor and ambient temperature sensor outputs:
- a first pressure and a first temperature downstream of the MAF sensor;
- a second pressure and a second temperature at the exhaust manifold;
- a third pressure and a third temperature at the FAM sensor;
- and
- a controller calculating each of fuel injector drift and MAF sensor bias using the IM pressure and IM temperature, the MAF sensor output, the FAM sensor output, the fuel injector output, the first, second and third pressures, and the first, second, and third temperatures.
11 more elements
Dependencies are inferred from the claim text.