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Method for enriching exhaust gases with unburnt hydrocarbon

一种碳氢化合物、未燃烧的技术，应用在排气装置、燃烧发动机、燃料中加入非燃料物质等方向，能够解决昂贵排气系统、限制排气歧管设计可能性等问题，达到连续NOx降低的效果

Active Publication Date: 2014-11-26
VOLVO TRUCK CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Methods of controlling exhaust flow through controllable valve arrangements or internal dividing walls dividing the exhaust manifold and / or system into at least two sections result in more expensive exhaust systems and require larger space
However, specially designed exhaust manifolds require significant design effort and limit the possible design possibilities of exhaust manifolds

Method used

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  • Method for enriching exhaust gases with unburnt hydrocarbon
  • Method for enriching exhaust gases with unburnt hydrocarbon

Examples

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Embodiment Construction

[0027] Various aspects of the invention will be described in detail below with reference to the accompanying drawings, in which like reference numerals indicate like elements, and variations of aspects of the invention are not limited to those particularly shown. embodiment, but can be applied to other variations of the present invention.

[0028] exist figure 1The internal combustion engine 10 schematically illustrated in FIG. 2 comprises a cylinder block 11 with six piston cylinders 12 , with an intake manifold 13 and an exhaust manifold 14 . The exhaust gas is guided via the exhaust duct 15 to a turbine wheel 17 of the turbo unit 16 . Said exhaust duct 15 is connected to the exhaust manifold 14 at a first outlet 26 of the exhaust manifold 14 . Turbine shaft 18 drives compressor wheel 19 of turbine unit 16 , which compresses air entering through intake duct 20 and passes it through charge air cooler 21 to intake manifold 13 . Fuel is supplied to each cylinder 12 by (not s...

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Abstract

The invention concerns a method for enriching the exhaust gases of a combustion engine (10) with unburnt hydrocarbon. The method comprises the steps of monitoring engine operating conditions and performing in-cylinder post injection of unburnt hydrocarbon into one predetermined cylinder (12) of at least two cylinders (12) connected to an exhaust manifold (14) when the monitored engine operating conditions equal predetermined engine operating conditions. The predetermined engine operating conditions are set for resulting in a substantially zero flow of said post - inj ected hydrocarbon to an EGR circuit for the specific design of the engine in operation.

Description

technical field [0001] The invention relates to a method of enriching the exhaust gas of an internal combustion engine comprising a plurality of cylinders, at least one exhaust manifold for receiving exhaust gas from at least two of said plurality of cylinders, with unburned hydrocarbons and an EGR circuit for supplying exhaust gas from the exhaust manifold to an intake port of at least one of the cylinders, wherein the exhaust manifold includes an exhaust gas supply for supplying exhaust gas to an exhaust aftertreatment system A first outlet and a second outlet for supplying exhaust gas to the EGR circuit. [0002] The invention also relates to a computer program comprising program code means, a computer program product comprising program code means stored on a computer readable medium, and a method for implementing said method for enriching the exhaust gas of an internal combustion engine with unburned hydrocarbons computer system. [0003] The invention is particularly ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/40F02D41/02F02D41/00F02D21/08F02M25/07
CPCF02D41/008F02M25/0707F02D41/0072F02B29/0406F02D41/0055F02D41/025F02D21/08F02M25/0717Y02T10/44Y02T10/26F02D41/405F02M25/0749F02D41/027F02M26/14F02M26/43F02M26/05Y02T10/12Y02T10/40F01N3/2033
Inventor 安尼卡·卡尔松
Owner VOLVO TRUCK CORP