Methods for regenerating an after treatment device

A technology for exhaust aftertreatment and exhaust valve, which is applied in the direction of electronic control of exhaust treatment device, exhaust device, exhaust treatment, etc., can solve the problems of accurate fuel spray dissipation length, etc., to increase the oil replacement interval, reduce The effect of engine degradation

Active Publication Date: 2014-02-12
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the fuel spray dissipation length determined by delta pressure may not be as accurate as desired

Method used

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  • Methods for regenerating an after treatment device
  • Methods for regenerating an after treatment device
  • Methods for regenerating an after treatment device

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Embodiment Construction

[0025] The present description relates to regenerating an exhaust aftertreatment device. figure 1 An example of a boosted diesel engine is shown, where Figure 4 A method of initiating aftertreatment device regeneration by controlling post-combustion fuel injection. figure 2 An example fuel injection through length is shown that provides a basis for the amount of fuel that may be injected to initiate aftertreatment device regeneration. Figure 3A-3B Shows how cylinder mixture density and pressure affect fuel injection penetration. at last, Figure 4 is an exemplary method for regenerating a particulate filter.

[0026] refer to figure 1 , an internal combustion engine 10 is controlled by an electronic engine controller 12, which includes a plurality of cylinders, one of which is shown in figure 1 middle. Engine 10 includes combustion chamber 30 and cylinder walls 32 with piston 36 positioned therein and connected to crankshaft 40 . Combustion chamber 30 is shown commun...

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Abstract

Methods and systems for regenerating an after treatment device are disclosed. In one example, the possibility of introducing fuel to oil during after treatment device regeneration is reduced. The methods and systems may reduce engine degradation and improve engine emissions.

Description

technical field [0001] The present invention relates to methods of regenerating exhaust aftertreatment devices and related engine systems. Background technique [0002] Diesel engines have relatively high efficiency compared to other internal combustion engines. Higher engine efficiency produces lower engine exhaust temperatures. Lower exhaust temperatures can make regeneration of aftertreatment devices more difficult because aftertreatment devices tend to begin regeneration at higher temperatures. One way to create higher temperatures in the exhaust system is to inject fuel late in the cylinder cycle (eg, during the exhaust stroke) so that the fuel can oxidize in the exhaust system, raising the exhaust system temperature. However, when liquid fuel is injected during the exhaust stroke, some portion of the injected fuel may impinge in liquid form on the cylinder wall. Fuel that encounters cylinder walls in liquid form can degrade the oil film on the cylinder walls and inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/02F02D41/30
CPCF01N9/00Y02T10/44F01N2430/085F01N3/0871F01N9/002F02D41/405Y02T10/26F02D35/026F01N3/025F02D2250/11F02D41/024Y02T10/12Y02T10/40
Inventor E·库尔茨
Owner FORD GLOBAL TECH LLC
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