Method for reducing emissions of an internal combustion engine and internal combustion engine

A technology for internal combustion engines and exhaust valves, applied in the direction of internal combustion piston engines, combustion engines, machines/engines, etc., can solve the problems of disturbed combustion, poor fuel economy, etc., and achieve the effects of reduced emissions, good mixing, and good fuel efficiency

Active Publication Date: 2015-12-02
WARTSILA FINLAND OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of direct water injection is that it interferes with combustion and thus leads to poor fuel economy

Method used

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  • Method for reducing emissions of an internal combustion engine and internal combustion engine
  • Method for reducing emissions of an internal combustion engine and internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Some embodiments of the invention will now be described in more detail with reference to the accompanying drawings.

[0018] figure 1 A part of an internal combustion engine 10 is schematically shown, which includes a cylinder 1 , a reciprocating piston 2 arranged in the cylinder 1 , an intake passage 3 , an exhaust passage 4 , an intake valve 5 , an exhaust valve 6 and a water injection nozzle 7 . Intake air is introduced into cylinder 1 via intake duct 3 , which is connected to cylinder 1 in a conventional manner. The intake passage 3 may be partially located in the cylinder head, and a part of the intake passage may be formed by a separate duct. Exhaust gas is led out of the cylinder 1 via an exhaust duct 4 connected to the cylinder 1 . The exhaust passage 4 may be partially located in the cylinder head, and a part of the exhaust passage may be formed by a separate pipe.

[0019] The internal combustion engine 10 also includes means 8 , 9 for opening and closing t...

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PUM

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Abstract

A method for reducing emissions of an internal combustion engine(10), which engine (10) comprises at least one cylinder (1), a reciprocating piston (2) arranged inside the cylinder (1), an intake channel(3), an exhaust channel (4), at least one intake valve (5) and at least one exhaust valve (6). The intake valve (5) is closed during the intake stroke before the piston (2) reaches bottom dead center. After closing the intake valve (5), the exhaust valve (6) is reopened for letting exhaust gas flow into the cylinder (1). Before closing the exhaust valve (6), water is injected into the exhaust channel (4).The invention also concerns an internal combustion engine(10).

Description

technical field [0001] The invention relates to a method for reducing emissions of an internal combustion engine comprising at least one cylinder and a reciprocating piston arranged within the cylinder. The invention also relates to an internal combustion engine comprising at least one cylinder and a reciprocating piston arranged in the cylinder. Background technique [0002] Due to harmful nitrogen oxides (NO X ), Carbon Monoxide (CO), Volatile Hydrocarbons (HC), Particulate Matter (PM) and other emissions emission standards set increasingly stringent requirements, internal combustion engine manufacturers must find new ways to meet the requirements. At the same time, the fuel efficiency of internal combustion engines should be improved so that carbon dioxide (CO 2 ) emissions deceleration and ensures economical operation of the internal combustion engine. [0003] Usually, NO X Emissions can be reduced by reducing the temperature in the combustion chamber. One way of d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D13/02F02M25/025F02M25/07F02B47/02
CPCF02B47/02F01N3/04F02B29/0412F02B37/013F02B2275/32F02D13/0203F02D13/0242F02D13/0269F02D13/0273F02D41/006F02M25/03F02M25/0752Y02T10/121Y02T10/142F02M26/01Y02T10/12F01N3/18
Inventor V·诺德曼
Owner WARTSILA FINLAND OY
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