Method and device for operating an internal combustion engine
US-2024287927-A1 · Aug 29, 2024 · US
Method and apparatus for controlling operation of an internal combustion engine operating in HCCI combustion mode
US9394838B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9394838-B2 |
| Application number | US-201314077364-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 12, 2013 |
| Priority date | Nov 12, 2013 |
| Publication date | Jul 19, 2016 |
| Grant date | Jul 19, 2016 |
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Abstract
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An internal combustion engine is configured to operate in a homogeneous-charge compression-ignition combustion mode. A method for operating the internal combustion engine includes determining a desired effective charge dilution for a cylinder charge for a cylinder firing event. A desired air/fuel ratio, a desired intake air mass and a desired intake oxygen are determined to achieve the desired effective charge dilution for a combustion event. The desired air/fuel ratio is adjusted based upon a difference between the desired intake oxygen and the actual intake oxygen, and engine operation is controlled to achieve the adjusted desired air/fuel ratio.
First claim
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The invention claimed is: 1. Method for operating an internal combustion engine configured to operate in a homogeneous-charge compression-ignition (HCCI) combustion mode, comprising: determining a desired effective charge dilution for a cylinder firing event in accordance with the following relationship: ED = α Ambient Intake O 2 ( % ) - Intake O 2 ( % ) Ambient Intake O 2 ( % ) + β AFR - Stoichiometric AFR Stoichiometric AFR wherein Ambient Intake O 2 is an amount (in %) of oxygen in ambient air, Intake O 2 is an actual amount (in %) of oxygen in engine intake air, AFR is an actual air/fuel ratio, Stoichiometric AFR is the stoichiometric air/fuel ratio for the fuel, and α and β are positive, calibratable/tunable parameters; determining a desired air/fuel ratio, a desired intake air mass, and a desired intake oxygen to achieve the desired effective charge dilution; adjusting the desired air/fuel ratio based upon a difference between the desired intake oxygen and an actual intake oxygen; and controlling engine operation to achieve the adjusted desired air/fuel ratio. 2. The method of claim 1 , wherein controlling engine operation to achieve the adjusted desired air/fuel ratio comprises controlling a fast engine actuator to achieve the adjusted desired air/fuel ratio. 3. The method of claim 2 , wherein controlling the fast engine actuator to achieve the adjusted desired air/fuel ratio comprises controlling a setpoint for a variable cam phaser to achieve the adjusted desired air/fuel ratio. 4. The method of claim 1 , wherein adjusting the desired air/fuel ratio based upon the difference between the desired intake oxygen and the actual intake oxygen comprises adjusting the desired air/fuel ratio to an air/fuel ratio setpoint that is leaner than the desired air/fuel ratio in response to a change in an operator torque request comprising an accelerator pedal tip-in event. 5. The method of claim 1 , wherein adjusting the desired air/fuel ratio based upon the difference between the desired intake oxygen and the actual intake oxygen comprises adjusting the desired air/fuel ratio to an air/fuel ratio setpoint that is richer than the desired air/fuel ratio in response to a change in an operator torque request comprising an accelerator pedal tip-out event. 6. The method of claim 1 , wherein adjusting the desired air/fuel ratio based upon the difference between the desired intake oxygen and the actual intake oxygen comprises adjusting the desired air/fuel ratio in response to a change in engine load. 7. Method for operating an internal combustion engine configured to operate in a homogeneous-charge compression-ignition (HCCI) combustion mode, comprising: determining a desired effective charge dilution for a cylinder firing event in response to a change in an operator torque request during operation in the HCCI combustion mode in accordance with the following relationship: ED = α Ambient Intake O 2 ( % ) - Intake O 2 (
Assignees
Inventors
Classifications
changing valve lift or valve lift and timing · CPC title
the characteristics being an oxygen content or concentration or the air-fuel ratio · CPC title
with EGR valves located at or near the connection to the exhaust system · CPC title
Pedal position · CPC title
Detection of accelerating or decelerating state (detection thereof in general G01P) · CPC title
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- What does patent US9394838B2 cover?
- An internal combustion engine is configured to operate in a homogeneous-charge compression-ignition combustion mode. A method for operating the internal combustion engine includes determining a desired effective charge dilution for a cylinder charge for a cylinder firing event. A desired air/fuel ratio, a desired intake air mass and a desired intake oxygen are determined to achieve the desired …
- Who is the assignee on this patent?
- Gm Global Tech Operations Inc
- What technology area does this patent fall under?
- Primary CPC classification F02D41/0002. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jul 19 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).