Heating Device for Exhaust Gas in Internal Combustion Engine

• US 20080282687A1
• Filed: 09/29/2006
• Published: 11/20/2008
• Est. Priority Date: 09/30/2005
• Status: Active Grant

• Current Assignee: Korea Institute of Energy Research
• Original Assignee: Korea Institute of Energy Research
• Inventors: Park, Jong-Soo, Choi, Seung-Hoon, Yoon, Wang-Lai, Lee, Ho-Tae, Lee, Young-Jae, Cho, Sung-Ho, Lee, Shin-Kun, Seo, Dong-Joo, Yoo, Kyung-Seun
• Granted Patent: US 8,196,388 B2
• Time in Patent Office: Days
• US Class Current: 60/300
• CPC Class Codes: F01N 13/009 having two or more separate purifying devices arranged in series
• CPC Class Codes: F01N 2240/14 a fuel burner
• CPC Class Codes: F01N 2240/30 a fuel reformer
• CPC Class Codes: F01N 2610/03 the substance being hydrocarbons, e.g. engine fuel
• CPC Class Codes: F01N 2610/08 with prior mixing of the substances with a gas, e.g. air
• CPC Class Codes: F01N 2610/10 the substance being heated, e.g. by heating tank or supply line of the added substance
• CPC Class Codes: F01N 3/0253 adding fuel to exhaust gases
• CPC Class Codes: F01N 3/0256 the fuel being ignited by electrical means
• CPC Class Codes: F01N 3/103 Oxidation catalysts for HC and CO only
• CPC Class Codes: F01N 3/36 Arrangements for supply of additional fuel

Abstract

The present invention relates to a heating device for exhaust gas in an internal-combustion engine, which is driven by using LPG, LNG, a volatile oil, a light oil, biodiesel or oxygenated hydrocarbon being DME, the device consisting of a catalyst reactor reformer, an exhaust gas suction section and the second fuel supply device. The exhaust gas suction section is mounted for using oxygen included in the exhaust gas. When the heating device is driven, air and fuels are supplied to the catalyst reactor and the second fuel supply device via a single tube when the heating device is heated. The present invention provides with a heating device for exhaust gas capable of securing the durability of a heating device for exhaust gas and minimizing the amount of air supplied from the outside to the combustion reforming device by excluding carbon depositions in a tube due to a prolysis of LPG, LNG, a volatile oil, a light oil, biodiesel or oxygenated hydrocarbon being DME, and a method for driving the device.

Claims

1. A heating device for exhaust gas in an internal combustion engine comprising:

a tubular housing;

a reactor equipped in the housing, filled with a combustion reforming catalyst in order to burn/reform the exhaust gas and having an introducer with a heater equipped in the front end and a first fuel preheating line connected from the outside of the housing to be supplied with fuels;

an ignition part integrally formed at the rear end of the reactor so as to ignite a combustible gas partially mixed with the effluent gas from the reactor and the exhaust gas flowing between the reactor and the housing;

a nozzle mounted at the rear end of the ignition part to be provided with a fuel from a second fuel preheating line, spary the fuel to the exhaust gas and combust the exhaust gas secondarily; and

a mixer mounted at the rear end of the catalyst reactor for mixing the combustible gas by way of the combustible catalyst and the exhaust gas flowing between the catalyst reactor and the housing.

2. The device of claim 1, further comprising a separation plate having a plurality of holes so that the combustion reforming catalyst is fixed between the reactor and the ignition part and a combustible reforming gas is passed through.

3. The device of claim 1, further comprising an suction cone for sucking the exhaust gas at the front end of the introducing section of the reactor.

4. The device of claim 1, wherein the first fuel preheating line and the second fuel preheating line are bended several times in the housing.

5. The device of claim 1, wherein the first fuel preheating line and the second fuel preheating line are connected to the first fuel supply line and the second fuel supply line, respectively and at the same time the first fuel supply line and the second fuel supply line are connected to the first air supply line and the second air supply line, respectively to be provided with air.

6. The device of claim 5, wherein the first fuel preheating line and the second fuel preheating line are alternately provided with air and fuel.

7. The device of claim 1, wherein a plurality of suction holes are formed at the outer circumference of the ignition part so that the exhaust gas at the outside flows in.

8. The device of claim 1, wherein the suction hole has an increasing number or diameter toward the rear end of the ignition part resulting in increasing the amount of sucked exhaust gas.

9. The device of claim 7, further comprising an introducer to improve the exhaust gas to flow into the suction hole to the circumference of the ignition part, wherein the introducer in a cone shape having a decreasing surface area toward the rear end of the ignition part.

10. The device of claim 7, further comprising an introducing tube integrally formed to improve the exhaust gas to flow into the suction hole in the suction hole, wherein the introducing tube is bended and consisting of portions to be parallel and vertical to the exhaust gas.

11. A method for heating a catalyst agent for removing nitride oxide or a trap using the heating device for exhaust gas according to claim 1.

12. A method for providing with a reducing agent for removing nitride oxide using the heating device for exhaust gas according to claim 1.