Control device for internal combustion engine (as amended)
US-2015369155-A1 · Dec 24, 2015 · US
Methods and systems for humidity and PCV flow detection via an exhaust gas sensor
US9109523B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9109523-B2 |
| Application number | US-201314037249-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 25, 2013 |
| Priority date | Jan 18, 2013 |
| Publication date | Aug 18, 2015 |
| Grant date | Aug 18, 2015 |
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Abstract
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Methods and systems are provided for estimating a PCV flow to an engine based on the output of an exhaust gas oxygen sensor. During DFSO conditions, a reference voltage of the sensor is modulated initially with an intake throttle open and then with the intake throttle closed. PCV flow leaking past the piston valves in an aging engine, as well as an ambient humidity estimate, are inferred based on the outputs of the sensor during the modulating with the intake throttle open and closed.
First claim
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The invention claimed is: 1. A method for an engine system, comprising: during engine non-fueling conditions, where at least one intake valve and one exhaust valve are operating: opening and closing an intake throttle; modulating a reference voltage of an exhaust gas sensor with the intake throttle closed and open; and indicating engine degradation based on positive crankcase ventilation (PCV) flow, the PCV flow based on outputs of the sensor during the modulating.…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Cross-Sectional Technologies · mapped topic
Physics · mapped topic
Cross-Sectional Technologies · mapped topic
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- What does patent US9109523B2 cover?
- Methods and systems are provided for estimating a PCV flow to an engine based on the output of an exhaust gas oxygen sensor. During DFSO conditions, a reference voltage of the sensor is modulated initially with an intake throttle open and then with the intake throttle closed. PCV flow leaking past the piston valves in an aging engine, as well as an ambient humidity estimate, are inferred based …
- Who is the assignee on this patent?
- Ford Global Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification F02D41/0055. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Aug 18 2015 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).