Engine system
US-9464597-B2 · Oct 11, 2016 · US
Waste heat recovery system for controlling EGR outlet temperature
US9175643B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9175643-B2 |
| Application number | US-201114239487-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 22, 2011 |
| Priority date | Aug 22, 2011 |
| Publication date | Nov 3, 2015 |
| Grant date | Nov 3, 2015 |
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Abstract
Official abstract text for this publication.
An engine system and various methods for controlling the outlet temperature of an EGR stream before entering an engine intake system are disclosed. In a system and the various methods, an exhaust gas recirculation (EGR) valve is positioned within an EGR passage fluidly connecting an engine exhaust stream and an engine intake stream, while a waste heat recovery (WHR) system is used to recover heat from the EGR stream. An engine control unit (ECU) is coupled to various sensors and valves to divert working fluid in the WHR system from cooling the EGR exhaust flow below a level which favors production of condensation in the engine intake system. The ECU operates to divert working fluid flow away from the EGR boiler when sensors indicate characteristics of either the exhaust flow or the intake stream which might lead to heavy condensation. A three-way valve is also used to divert the working fluid to a variable expansion valve fluidly coupled to the three-way valve in response to a signal from one of the sensors to prevent damage to the system turbine.
First claim
Opening claim text (preview).
What is claimed is: 1. A system for controlling EGR stream outlet temperature before entering an engine intake system, the control system comprising: an exhaust gas recirculation (EGR) valve positioned within an EGR passage fluidly connecting an engine exhaust stream and an engine intake stream; a super heater fluidly coupled by an inlet and an outlet to the EGR passage after the EGR valve; a boiler fluidly coupled by an inlet to the super heater and by an outlet to the EGR pa…
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Classifications
Mechanical Engineering · mapped topic
Cross-Sectional Technologies · mapped topic
- F02M25/0715Primary
Mechanical Engineering · mapped topic
Cross-Sectional Technologies · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US9175643B2 cover?
- An engine system and various methods for controlling the outlet temperature of an EGR stream before entering an engine intake system are disclosed. In a system and the various methods, an exhaust gas recirculation (EGR) valve is positioned within an EGR passage fluidly connecting an engine exhaust stream and an engine intake stream, while a waste heat recovery (WHR) system is used to recover he…
- Who is the assignee on this patent?
- Park Deokkyu, Int Engine Intellectual Prop
- What technology area does this patent fall under?
- Primary CPC classification F02M25/0715. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Nov 03 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).