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Waste gas discharging controller

A control device and exhaust gas emission technology, applied in the direction of electrical control, exhaust device, exhaust treatment device, etc., can solve the problems of fuel consumption, long temperature, etc., to increase the start interval, reduce the start frequency, prevent The effect of energy waste

Inactive Publication Date: 2003-06-25
MITSUBISHI MOTORS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with this method, since the change in exhaust gas temperature is slight, when the exhaust gas temperature is much lower than the maximum conversion temperature range, it takes a long time to increase the temperature, greatly exacerbating fuel consumption

Method used

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Examples

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Embodiment Construction

[0036] Detailed description of the preferred embodiment

[0037] An exhaust emission control device for a diesel engine related to an embodiment of the present invention will be described below with reference to the accompanying drawings. figure 1 It is a schematic diagram showing the overall structure of a diesel engine equipped with the exhaust emission control device. Figure 2 to Figure 4 is a graph representing a control chart for control. in addition, Figure 5 to Figure 7 is a flowchart for explaining this function. in addition, Figure 8 is a control block diagram for explaining this function.

[0038] Such as figure 1 As shown in , the diesel engine in this embodiment includes an engine main body 40 , an air intake system 2 , an exhaust gas system 3 , an exhaust gas recirculation system (EGR system) 44 and a control unit (controller) 14 .

[0039] The air intake system 2 includes an air intake pipe 20 , a compressor 21 , an intercooler 22 , and a throttle valve ...

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PUM

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Abstract

A control unit activates regeneration assist means, if a specific operating state involving incomplete combustion of particulates by NO2 continues for a predetermined period or more, as a first determination condition, and controls an exhaust gas temperature or a temperature of a catalyst to enhance the conversion efficiency of the catalyst into NO2, thereby continuously regenerating the particulates. The control unit activates forced regeneration means, if a deposited amount of particulates detected by deposited amount detecting means exceeds a predetermined value, as a second determination condition, and controls the exhaust gas temperature or a temperature of a filter to be higher than that of when the regeneration assist means is activated to forcibly regenerate the filter. The control unit activates either the forced regeneration means or the regeneration assist means in accordance with the temperature sensed by temperature sensing means, if the first and second determination conditions are simultaneously established.

Description

technical field [0001] The invention relates to an exhaust emission control device suitable for diesel engines. Background technique [0002] Exhaust gas discharged from a diesel engine contains particles (soot) mainly composed of carbon, and various technologies capable of suppressing emission of such soot into the atmosphere have been proposed. [0003] As one of these technologies, a continuous regeneration type exhaust emission control device is known in which an oxidation catalyst and a diesel particulate filter (DPF) are successively provided in an exhaust pipe of a diesel engine from an upstream side. [0004] In this exhaust emission control device, NO in exhaust gas is oxidized by an oxidation catalyst to produce <chemistry num="001"> <chem file="02156712_cml001.xml" / > < / chemistry> , and the soot (carbon) trapped in the DPF is replaced by the NO produced by the oxidation catalyst 2 oxidation ( <chemistry num="002"> <chem file="02156...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/02B01D46/42F01N3/023F01N3/025F01N3/029F01N3/035F01N9/00F01N13/02F02B37/00F02B37/18F02D41/02F02D41/14F02D41/40F02M25/07
CPCF01N2260/14F02D41/1446F02D2200/0802F01N3/0231F01N13/02Y02T10/47F01N2013/026F02M25/0727F02D2200/0812F02B37/00F02D41/024F02B37/18F02D41/029F02D2200/501Y02T10/44F01N9/002F01N3/0235F02D41/405F01N3/035Y02T10/26F02D2200/602F02M25/0707F01N13/009F01N13/0097F02M26/05F02M26/23Y02T10/12Y02T10/40F01N3/023
Inventor 森本学大桥一也寺田干夫
Owner MITSUBISHI MOTORS CORP
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