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Filter control system

A control system and filter technology, applied in electrical control, engine control, dispersed particle filtration, etc., can solve problems such as regeneration frequency shortening filter life and so on

Inactive Publication Date: 2008-07-09
DIESEL KIKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The end result is that it tends to unnecessarily shorten the filter life disadvantage by increasing the frequency of filter regeneration

Method used

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  • Filter control system
  • Filter control system
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Embodiment Construction

[0025] For a more detailed understanding of the invention, it will now be explained with reference to the accompanying drawings.

[0026] FIG. 1 is a schematic diagram showing an exhaust gas treatment system equipped with a filter control system according to an embodiment of the present invention. Exhaust gas treatment system 1 is a system for after-treating particulates contained in exhaust gas of diesel engine 2 , and is installed between outlet port 3A of exhaust manifold 3 and exhaust pipe 4 of diesel engine 2 . The exhaust gas treatment system 1 has an exhaust gas channel 5 comprising a pair of parallel channel parts, diverging at the inlet end at the outlet end 3A of the exhaust manifold 3 and merging together at the end of the exhaust pipe 4 to form mutually branched channels. . The first branch passage 51 and the second branch passage 52 constituting the pair of parallel passage portions are respectively equipped with a first filter 61 and a second filter 62 for colle...

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Abstract

In order to estimate the deposition quantity of particulates in a first filter or a second filter, a first estimating section outputting first estimation data based on the differential pressure across the filter, and a second estimating section outputting second estimation data (XB) based on the operating state of an engine are provided. A decision is made whether the filter must be regenerated or not by selecting one of the first estimation data (XA) or the second estimation data (XB) having a higher reliability in view of the rotation of the engine at that time. Alternatively, difference between the first and second estimation data (XA, XB) is also taken into account and when the difference is larger than a specified level, selection of the first estimation data (XA) is prohibited because it may have a low reliability due to cracking of depositied particulates even if the rotational speed of the engine is high.

Description

technical field [0001] The present invention relates to a filter control system capable of properly timing regeneration of a filter to collect particulates contained in engine exhaust. Background technique [0002] In recent years, various devices for post-processing diesel particulates in engine exhaust gas have been developed, installed in exhaust systems of diesel engines, for preventing particulates contained in diesel exhaust gas from being dispersed into the atmosphere. Such an exhaust gas treatment device is equipped with a filter for collecting particulates contained in exhaust gas emitted from a diesel engine when it passes through an exhaust gas passage. As the particulates collected by the filter are gradually deposited in the filter, the filter will eventually clog so that the exhaust gas cannot pass through. [0003] Therefore, in such conventional exhaust gas treatment equipment, when the amount of particulates deposited in the filter is estimated to reach a p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/02B01D46/42F01N3/023F01N3/025F01N3/032F01N9/00F01N13/04
CPCF01N11/005F01N2900/1606F01N2560/08F01N2550/12F01N9/005F01N11/002Y02T10/47F02D2200/0812F02D41/029F01N9/002F02D2400/08F02D41/1467F01N13/04F02D41/2451F01N3/023F01N3/0256F01N2550/04F02D41/1445F01N3/032F01N13/011Y02T10/40
Inventor 滨畑敏宏伊藤悟
Owner DIESEL KIKI CO LTD