Exhaust gas purification device
An exhaust gas purification device and exhaust gas technology, which is applied in the direction of exhaust device, electric control of exhaust treatment device, silencer device, etc., can solve the problem of particle filter aging and other problems
Inactive Publication Date: 2002-12-18
TOYOTA JIDOSHA KK
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Problems solved by technology
If the particulate filter is exposed to high temperature conditions exceeding 800°C for a long time in this way, the particulate filter will age quickly, thus creating a problem: the old particulate filter must be replaced with a new one frequently
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[0049] Best Mode for Carrying Out the Invention
[0050] figure 1 The application of the invention to a compression ignition internal combustion engine is shown. It should be noted that the invention is also applicable to spark ignition internal combustion engines.
[0051] refer to figure 1 , mark 1 represents the body of the engine, mark 2 represents the cylinder block, mark 3 represents the cylinder head, mark 4 represents the piston, mark 5 represents the combustion chamber, mark 6 represents the electronically controlled fuel injector, mark 7 represents the intake valve, mark 8 represents The air inlet, the mark 9 represents the exhaust valve, and the mark 10 represents the exhaust port. The air inlet 8 is connected via a corresponding intake pipe 11 to a surge tank 12 which in turn is connected to a compressor 15 of an exhaust gas turbocharger 14 via an intake pipe 13 . An airflow meter 13a for measuring the flow rate of the incoming air is provided in the intake pip...
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An exhaust gas purification device used on an engine provided with a combustion chamber, comprising: an exhaust gas channel; a particle filter, which is arranged in the exhaust gas channel and used for removing particles in the exhaust gas discharged from the combustion chamber through an oxidation reaction ; a device for controlling the characteristics of the exhaust gas flowing into the particulate filter, wherein: when the judging device judges that the particulate filter will cause thermal aging, the control device will change the characteristics of the exhaust gas flowing into the particulate filter, thereby preventing the particulate filter from being filtered heat damage to the device.
Description
technical field [0001] The invention relates to an engine exhaust gas purification device. Background technique [0002] In prior art diesel engines, the particles contained in the exhaust gas are removed by setting a particulate filter in the exhaust passage of the engine and using the particulate filter to collect the particles in the exhaust gas, and then igniting These particles are collected in the particulate filter and burned with the aim of reusing the particulate filter. However, the particles collected in the particulate filter will only ignite at a temperature of at least about 600°C. However, the exhaust temperature of a diesel engine is usually much lower than 600°C. Therefore, it is difficult to ignite the particulates collected in the particulate filter by the heat of the exhaust gas. In order to be able to use the heat of the exhaust gas to ignite the particles collected in the particulate filter, it is necessary to lower the ignition point of the particle...
Claims
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IPC IPC(8): B01D53/94F01N3/022F01N3/023F01N3/031F01N3/032F01N3/035F01N3/08F01N11/00F02B37/00F02D21/08F02D41/00F02D41/02F02D41/38F02M25/07
CPCB01D53/9495F01N3/0222F01N3/023F01N3/0231F01N3/0233F01N3/031F01N3/032F01N3/035F01N3/0821F01N3/0842F01N3/0871F01N3/0885F01N9/002F01N11/00F01N2250/14F01N2550/04F01N2570/04F01N2570/16F01N2900/0422F02B37/00F02D41/0002F02D41/0047F02D41/005F02D41/0055F02D41/0057F02D41/0235F02D41/0245F02D41/025F02D41/028F02D41/029F02D41/1462F02D41/187F02D41/3809F02D2011/102F02D2041/0017F02D2041/389F02D2200/0804F02D2200/0806F02D2200/0808F02D2200/0818F02D2200/602F02D2250/38F02M26/05F02M26/10F02M26/28F02M26/47Y02T10/12Y02T10/40F01N3/02
Inventor 广田信也田中俊明伊藤和浩浅沼孝充中谷好一郎木村光壱
Owner TOYOTA JIDOSHA KK