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Exhaust gas purification device for internal combustion engine

An exhaust gas purification device and technology for exhaust gas purification, which are applied in the direction of exhaust gas device, electronic control of exhaust gas treatment device, internal combustion piston engine, etc., can solve problems such as the effect of fuel ignition

Inactive Publication Date: 2012-12-12
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a change in the flow state of the exhaust gas will affect, for example, the ignition of the fuel by the ignition unit in the device of the above-mentioned Patent Document 1.

Method used

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  • Exhaust gas purification device for internal combustion engine
  • Exhaust gas purification device for internal combustion engine
  • Exhaust gas purification device for internal combustion engine

Examples

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Embodiment Construction

[0012] First, according to figure 1 A basic configuration example of an exhaust purification system for an internal combustion engine according to the present invention will be described. exist figure 1 Among them, the exhaust purification device S of an internal combustion engine includes an exhaust purification member M provided in an exhaust passage P and a temperature control device R for controlling the temperature of the exhaust purification member M. The temperature control device R has: an oxidation promotion member R1 provided on the upstream side of the exhaust gas purification member M; a fuel addition unit R2 positioned on the upstream side of the oxidation promotion member R1; and an oxidation promotion member R1 located upstream of the oxidation promotion member R1 Side heating unit R3. exist figure 1 In the above, the oxidation promoting member R1 including a catalyst having an oxidation function, the fuel adding unit R2, and the heating unit R3 are all provi...

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PUM

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Abstract

An exhaust gas purification device for an internal combustion engine, comprising: an oxidation promotion member (R1) provided upstream of an exhaust gas purification member (M) in the exhaust gas outlet passage (P) and including a catalyst having an oxidation function; a fuel addition means (R2) and a heat generation means (R3) which are positioned upstream of the oxidation promotion member (R1); and a control means (C) for controlling the activation of the fuel addition means and the activation of the heat generation means. When the temperature of the exhaust gas purification member (M) is within a predetermined temperature range and at the same time the flow speed of exhaust gas is higher than or equal to a predetermined level, the control means (C) does not activate the heat generation means (R3) but activates the fuel addition means (R2), and when the temperature of the exhaust gas purification member (M) is within the predetermined temperature range and at the same time the flow speed of the exhaust gas is lower than the predetermined level, the control means (C) activates the heat generation means (R3) and also activates the fuel addition means (R2).

Description

technical field [0001] The present invention relates to an exhaust purification device of an internal combustion engine for purifying exhaust gas. Background technique [0002] Patent Document 1 discloses a catalyst temperature raising device for raising the temperature of a catalyst that purifies exhaust gas of an engine. According to the description in Patent Document 1, an addition valve and an ignition unit are provided at a position upstream of the catalyst in the exhaust flow passage, the addition valve is provided with an injection port for injecting fuel, and the ignition unit is provided with a heat generating unit for igniting the fuel. The adding valve and the ignition unit are arranged at a position where the fuel injected from the injection port of the adding valve directly contacts the heat generating part of the ignition unit. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2006-112401 [0004] However, although the device of the above-mentioned Pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F01N3/02
CPCF01N13/009F01N2560/07F01N3/0842F01N3/0871F01N3/36F01N3/027F01N2900/1404F01N2240/30F01N3/2033F01N13/02F01N2900/1411F01N3/106Y02T10/47F01N3/2013F01N3/38F01N2610/03F01N3/2892F01N9/002Y02T10/26F01N3/0253F01N3/2066F01N2240/16F01N2240/20Y02T10/12Y02T10/40
Inventor 田中未来
Owner TOYOTA JIDOSHA KK