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Filter regeneration control device and filter regeneration control method

A regenerative control and filter technology, applied in exhaust devices, mufflers, machines/engines, etc., can solve problems such as DPF damage, diesel engine output reduction, fuel consumption deterioration, etc., and achieve the effect of preventing sulfur poisoning

Active Publication Date: 2021-08-06
ISUZU MOTORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, if the accumulated amount of PM exceeds a certain amount, for example, a reduction in the output of the diesel engine, deterioration of fuel efficiency, and damage to the DPF due to abnormal combustion of PM will occur.

Method used

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  • Filter regeneration control device and filter regeneration control method
  • Filter regeneration control device and filter regeneration control method
  • Filter regeneration control device and filter regeneration control method

Examples

Experimental program
Comparison scheme
Effect test

Deformed example 1

[0060] In the above embodiment, the fuel injection when the filter regenerated is the case where the fuel injection is taken as an example, but fuel injection can be performed by a fuel injection valve (omitted) provided in the exhaust passage 3 (so-called " Exhaust pipe spray).

Deformed example 2

[0062] In the above embodiment, the case where the sulfur concentration of the fuel by the concentration sensor 9 is mentioned, but is not limited thereto. For example, the ECU 7 can also calculate (measure, estimated) of the sulfur concentration contained in the exhaust gas.

Deformed example 3

[0064] In the above embodiment, the case where the upstream side of the DPF 11 is set to be described as an example, but is not limited thereto. For example, figure 1 In, it is also possible to have an absorbent nitrogen oxide reduction catalyst (Lean NOx TRAP: LNT) instead of DOC10. In this case, the sulfur poisoning of LNT can be prevented.

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PUM

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Abstract

The present invention provides a filter regeneration control device and a filter regeneration control method for preventing sulfur poisoning of a filter. The ECU (7) includes: a concentration determination unit (110), which determines whether the sulfur concentration of the fuel or exhaust gas supplied to the diesel engine (1) is greater than a threshold value when the conditions for performing filter regeneration are satisfied; and a regeneration control unit (120) , when the sulfur concentration is not above the threshold, the fuel injection device (6) is controlled to perform normal filter regeneration, and when the sulfur concentration is above the threshold, to perform fuel injection time compared to normal filter regeneration The fuel injection device (6) is controlled in a special filter regeneration mode in which at least one of the fuel injection amount and the fuel injection amount is greater.

Description

Technical field [0001] The present invention relates to a filter regeneration control device and a filter regeneration control method for controlling the regeneration of a filter of particulate matter in the exhaust gas. Background technique [0002] In the past, the particulate matter contained in the exhaust gas of the diesel engine was known to capture DPF (Diesel Particulate Filter, Diesel Particle Filter) of the Diesel Particulate Filter, Diesel Particle. [0003] A portion of the PM in the DPF trap is combusted by high temperature exhaust gas discharged from the diesel engine (referred to as passive regeneration, or continuous regeneration), and the remainder is accumulated in the DPF. Moreover, if the amount of PM exceeds a quantity, for example, a decrease in the output of the diesel engine, the deterioration of the fuel consumption, and the damage caused by the abnormal combustion of PM, and the like. [0004] Therefore, it is known that the following filter regeneration...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/025F01N3/035
CPCF01N3/025F01N3/035
Inventor 景山遊大大石和贵
Owner ISUZU MOTORS LTD
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