Systems and methods for stopping and starting an engine with dedicated egr
US-2015369180-A1 · Dec 24, 2015 · US
Method and system for engine control
US9759135B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9759135-B2 |
| Application number | US-201414245945-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 4, 2014 |
| Priority date | Apr 4, 2014 |
| Publication date | Sep 12, 2017 |
| Grant date | Sep 12, 2017 |
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- Title
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Abstract
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Methods and systems are provided for using compression heating to heat a cylinder piston before cylinder combustion is resumed. Cylinder heating is achieved using combinations of slow unfueled engine rotation where the engine cylinders are heated via compression stroke heating, and slow compressor rotation where the cylinders are heated via compression heating. One or more intake or exhaust heaters may be concurrently operated to expedite cylinder heating.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method, comprising: while propelling a hybrid vehicle via only motor torque, rotating an engine unfueled via the motor torque at lower than engine cranking speed while operating an exhaust heater coupled to an exhaust catalyst and while holding an EGR valve open and an upstream intake throttle closed to recirculate heated aircharge through the engine. 2. The method of claim 1 , wherein the rotating is in response to cylinder piston temperature being lower than a threshold, and wherein the rotating is continued until the piston temperature is higher than the threshold. 3. The method of claim 1 , further comprising, during the rotating, operating an intake heater coupled in an intake passage of the engine. 4. The method of claim 1 , further comprising operating an electrically-actuated compressor coupled to an intake of the engine while opening a compressor recirculation valve coupled across the compressor. 5. The method of claim 1 , further comprising, during the rotating, adjusting cam timing to increase positive intake valve to exhaust valve overlap.
Assignees
Inventors
Classifications
Combustion engines, Gas turbines · CPC title
Cross-Sectional Technologies · mapped topic
Controlling intake air · CPC title
Aiding engine start by using decompression means or variable valve actuation · CPC title
Turbocharger state · CPC title
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- What does patent US9759135B2 cover?
- Methods and systems are provided for using compression heating to heat a cylinder piston before cylinder combustion is resumed. Cylinder heating is achieved using combinations of slow unfueled engine rotation where the engine cylinders are heated via compression stroke heating, and slow compressor rotation where the cylinders are heated via compression heating. One or more intake or exhaust hea…
- Who is the assignee on this patent?
- Ford Global Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification B60W10/06. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Sep 12 2017 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).