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Fuel injection system for diesel engines with compression ignition

A technology for diesel engines and injection systems, applied in combustion engines, internal combustion piston engines, engine components, etc., to solve problems such as mechanical damage and deflagration

Inactive Publication Date: 2013-12-25
ABB TURBO SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is contradictory according to the current state of the art, since in the case of very early injection of diesel fuel in conventional injection systems it can lead to knocking ("diesel knock"), which can lead to mechanical damage

Method used

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  • Fuel injection system for diesel engines with compression ignition
  • Fuel injection system for diesel engines with compression ignition
  • Fuel injection system for diesel engines with compression ignition

Examples

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Embodiment Construction

[0022] The shown arrangement comprises a cylinder 115 with a movable piston 113 , wherein the cylinder head is connected to said cylinder 115 via a flame ring 119 . A combustion chamber 117 is formed between the cylinder 115 , the cylinder head, and the movable piston 113 .

[0023] In the cylinder head, an intake opening 110 and an exhaust opening 109 are provided, which can be closed by controlled intake valves 105 and exhaust valves 103 , respectively.

[0024] Furthermore, the cylinder head has a conventional injection nozzle 107 and an additional injection nozzle 101 offset by 90°.

[0025] according to figure 1 In an exemplary embodiment, the additional injection nozzle 101 is oriented such that the jet 122 is directed towards the exhaust valve 103 . in accordance with figure 2 In another alternative embodiment, the adjusted nozzle 101 is oriented such that the jet 121 is directed towards the flame ring 115 .

[0026] Injection nozzles 107 are formed in the cylinder...

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Abstract

In a fuel injection system and method for a diesel engine with compression induced ignition, NOx emissions are reduced by providing a supplemental fuel injection nozzle in addition to a conventional fuel injection nozzle. In addition, the supplemental injection nozzle injects a first combustion quantity onto a vaporization surface at a first injection time to generate a lean air / fuel mixture. Thereafter, the combustion quantity is led into the combustion chamber at a second injection time to produce a rich air / fuel combustion mixture.

Description

technical field [0001] The invention relates to an injection system for a compression ignition diesel engine for the controlled injection of fuel into the combustion chamber of the cylinder and into the piston by means of injection nozzles, with controllable intake and exhaust valves , wherein an injection valve is arranged approximately centrally above the combustion chamber. Background technique [0002] During combustion in an engine, NOx compounds are formed due to high temperatures. The higher the combustion temperature, the higher the NOx emissions. In order to limit the formation of NOx, a lean burn (excess air) is aimed at. [0003] In the case of diesel combustion, regions of stoichiometric combustion (without air excess) occur due to inhomogeneous mixture formation. For this reason, in isobaric combustion with an excess of air, higher NOx emissions can in principle occur than in isovolumetric processes with homogeneous mixture formation. [0004] In order to li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/14
CPCF02D41/3047F02D41/3094F02D41/402Y02T10/12Y02T10/40F02D41/30F02M47/00F02M63/00
Inventor C·马太P·特雷穆利
Owner ABB TURBO SYST