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Exhaust-gas processing device for a diesel engine

A technology of exhaust treatment device and diesel engine, which is applied in the direction of electronic control of exhaust treatment device, exhaust treatment, exhaust device, etc., which can solve the problems of fuel consumption deterioration and output drop, and achieve the purpose of suppressing output drop, suppressing Fuel consumption deterioration, the effect of suppressing the long-term

Active Publication Date: 2014-07-09
KUBOTA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] "Problems" tend to produce worse fuel consumption and lower output
[0008] After the PM accumulation detection value reaches the first set value and the forced regeneration while driving is started, the PM combustion removal speed competes with the PM accumulation speed. , does not report the need to perform forced regeneration when parking, and forced regeneration continues for a long time while driving, which often leads to problems of worsened fuel consumption and decreased output

Method used

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  • Exhaust-gas processing device for a diesel engine
  • Exhaust-gas processing device for a diesel engine
  • Exhaust-gas processing device for a diesel engine

Examples

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Embodiment Construction

[0046] Figure 1 to Figure 5 It is a figure explaining the exhaust gas treatment apparatus of the diesel engine which concerns on embodiment of this invention, In this embodiment, the exhaust gas treatment apparatus of a multi-cylinder diesel engine is demonstrated.

[0047] figure 1 The outline of the shown diesel engine is as follows.

[0048] A cylinder head (cylinder head) 19 is assembled on the top of the cylinder block 18, an engine cooling fan 20 is arranged at the front portion of the cylinder block 18, a flywheel (flywheel) 21 is arranged at the rear portion of the cylinder block 18, and a flywheel 21 is installed There is a rotor plate 22 . In addition, a sensor plate (sensor plate) 24 attached to a valve camshaft 23 is arranged at the rear of the cylinder block 18 . An exhaust manifold 25 is arranged on one side of the cylinder head 19 , and the exhaust manifold 25 communicates with a supercharger 26 . Downstream of the turbine 15 of the supercharger 26, a DPF c...

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Abstract

A diesel engine is provided with a diesel-particulate filter (1), an estimator (2) for presuming the amount of particulate matter to be deposited on the filter, a filter-regenerator (3), a regeneration control means (4), a storing means (5), a means (6) for sending a message to demand an accelerated regeneration, and a starter (7) for starting the accelerated regeneration. While a normal regeneration processing continues (S6) since it has started (S2), the time when a term (T1) for reserving judgment as to the demand for accelerated regeneration has elapsed is taken as the judging time (T3). At this judging time (T3), if the presumed value for the amount of deposited particulate matter exceeds a value (J2) for judgment as to the demand for accelerated regeneration, the accelerated regeneration is deemed to be demanded. Then the control means allows the message sender to demand the accelerated regeneration to start (S8) sending the message to demand the accelerated regeneration.

Description

technical field [0001] The present invention relates to an exhaust gas treatment device for a diesel engine, and in detail to an exhaust gas treatment device for a diesel engine capable of suppressing fuel consumption deterioration and output drop. [0002] In terms of the present specification and claims, DPF means a diesel particulate filter (diesel particulate filter), PM means exhaust gas particulate matter, and DOC means an oxidation catalyst. Background technique [0003] Conventionally, an exhaust gas treatment device for a diesel engine has a DPF, a PM accumulation amount detection unit for detecting the amount of PM deposited on the DPF, a forced regeneration unit, a forced regeneration control unit, and a forced regeneration reporting unit (for example, refer to Patent Document 1 of figure 1 , figure 2 ). [0004] In this prior art, the DPF captures PM in the exhaust gas, and when the detected value of the PM accumulation amount reaches the first set value in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/025F01N9/00F02D41/38
CPCF01N2900/0422F01N2900/1606F01N2900/0601F01N9/002F01N3/0253Y02T10/47F01N3/035F01N3/023Y02T10/40F01N9/00F01N2260/04Y02T10/12
Inventor 山田修一井上胜支石井裕喜
Owner KUBOTA CORP