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Pre-chamber arrangement

A technology of pre-chamber and pre-mixed combustion, which is applied in the direction of fuel injection device, charging system, combustion engine, etc. It can solve the problems that cannot be satisfied at the same time, and achieve the effect of reliable pre-chamber ignition, effective combustion and rapid mixing

Inactive Publication Date: 2011-01-26
WARTSILA FINLAND OY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although various pre-chamber arrangements are known, they do not simultaneously meet the above requirements

Method used

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Embodiment Construction

[0016] Reference numeral 1 in the drawings refers to a cylinder of a lean-burn internal combustion engine, which comprises a cylinder liner 2 , a reciprocating piston 3 and a main combustion chamber 4 . The main combustion chamber 4 is delimited in a conventional manner by a cylinder head 5 with inlet and outlet ducts and valves. The cylinder head 5 is additionally provided with a prechamber arrangement 6 comprising a first chamber 7 and a second chamber 8 . The first chamber 7 is provided with injection means 9 for providing pilot injection and optionally with a glow plug 10 . The part of the second chamber 8 facing the main combustion chamber 4 is provided with a plurality of nozzle holes 8 a, which are preferably arranged symmetrically with respect to the main combustion chamber 4 .

[0017] As can be seen from the figure, according to the invention, the first chamber 7 of the prechamber arrangement 6 is of substantially elliptical shape with smoothly curved walls. The fi...

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Abstract

The invention relates to a pre-chamber arrangement for a cylinder (1) of an internal combustion engine fitted for premixed combustion (Otto cycle), the pre- chamber arrangement including a first chamber (7) for mixing and igniting of the fuel and a second chamber (8) of substantially smaller volume for communication between the first chamber (7) and the main combustion chamber (4) of the cylinder (1), the first chamber (7) being provided with pilot injection means (9) and having a chamber top substantially opposite to the second chamber (8). The first chamber (7) has substantially oval shape with curved walls between the chamber top and the second chamber (8). The second chamber (8) is asymmetrically positioned with regard to the first chamber (7) so as to provide a tumble flow motion (A) in the first chamber (7) for the gaseous fuel pressed from the main combustion chamber (4) and guided by curved wall of the first chamber (7) towards and past the fuel of pilot injection means (9) to be ignited.

Description

technical field [0001] The invention relates to a prechamber arrangement for a cylinder of an internal combustion engine suitable for premixed combustion (Otto cycle) according to the preamble of claim 1, said prechamber arrangement comprising a A first chamber and a second chamber of much smaller volume for communication between said first chamber and the main combustion chamber of said cylinder, said first chamber being provided with pilot injection means and having a The second chamber is substantially opposite the top of the chamber. Background technique [0002] Pre-chambers are used especially in so-called lean-burn engines which require a powerful ignition source. In this case, the pre-chamber is used to provide higher energy to ignite the lean mixture in the main combustion chamber. In the pre-chamber, the base lean air / gas mixture from the main combustion chamber can be ignited by injection of a suitable fuel that reacts in excess air and autoignition under tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B19/16F02B19/12F02M61/14
CPCY02T10/125F02B19/10F02B19/08F02B19/1023F02B19/1014Y02T10/12F02B19/16
Inventor 汉努·西兰帕克里斯·哈塔尔阿尔贝托·卡法利朱塞佩·比安基吉安保罗·泽内蒂保罗·特穆里
Owner WARTSILA FINLAND OY
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