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US 9,790,876 B2Granted
Advanced exhaust gas recirculation fueling control
AssigneeCummins IP, Inc.
InventorsSamuel C. Geckler, Andrea Beck, Anthony Kyle Perfetto
Life of this patent
Estimating the term…
Abstract
For exhaust gas recirculation (EGR) fueling control, at least one donor cylinder of a plurality of cylinders in an engine provides exhaust gas to an air intake for the plurality of cylinders. A fuel variable restriction initially provides fuel concurrent with an intake stroke for the at least one donor cylinder in response to a transition from withholding the fuel to the plurality of cylinders.
Claims20
An apparatus for exhaust gas recirculation control comprising:
- a first donor cylinder and a second donor cylinder of a plurality of cylinders in an engine, the first donor cylinder and the second donor cylinder configured to provide exhaust gas recirculation (EGR) flow to an air intake for the plurality of cylinders;
- and
- a controller configured to control a fuel variable restriction in response to an engine operating condition, the fuel variable restriction initially providing a first amount of fuel concurrent with an intake stroke for the first donor cylinder before the first amount of fuel is provided to at least one non-donor cylinder in response to a transition from withholding the fuel to the plurality of cylinders, wherein the first amount of fuel is less than an amount of fuel required by the transition, wherein the fuel variable restriction subsequently provides a second amount of fuel to a second donor cylinder, and wherein the second amount of fuel is an amount of fuel required by the transition.
A method for exhaust gas recirculation control comprising:
- providing exhaust gas recirculation (EGR) flow to an air intake for a plurality of cylinders from a first donor cylinder and a second donor cylinder of the plurality of cylinders in an engine;
- initially providing a first amount of fuel from a fuel variable restriction concurrent with an intake stroke for the first donor cylinder before the first amount of fuel is provided to at least one non-donor cylinder in response to a transition from withholding the fuel to the plurality of cylinders to providing the fuel to the plurality of cylinders, wherein the first amount of fuel is less than an amount of fuel required by the transition, wherein the fuel variable restriction subsequently provides a second amount of fuel to a second donor cylinder, and wherein the second amount of fuel is an amount of fuel required by the transition.
A system for exhaust gas recirculation control comprising:
- an engine comprising a first donor cylinder, a second donor cylinder, and at least one non-donor cylinder of a plurality of cylinders, the first donor cylinder and the second donor cylinder configured to provide Exhaust Gas Recirculation (EGR) to an air intake for the plurality of cylinders;
- and
- a controller configured to control a fuel variable restriction in response to an engine operating condition, the fuel variable restriction initially providing a first amount of fuel concurrent with an intake stroke for the first donor cylinder before the first amount of fuel is provided to at least one non-donor cylinder in response to a transition from withholding the fuel to the plurality of cylinders to providing the fuel to the plurality of cylinders, wherein the first amount of fuel is less than an amount of fuel required by the transition, wherein the fuel variable restriction subsequently provides a second amount of fuel to a second donor cylinder, and wherein the second amount of fuel is an amount of fuel required by the transition.
Dependencies are inferred from the claim text.