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A method for the operation of a longitudinally scavenged two-stroke large diesel engine and a longitudinally scavenged two stroke large diesel engine

A diesel engine, a large-scale technology, applied in the direction of electrical control, mechanical equipment, exhaust devices, etc., can solve the problems of component failure and reduction, achieve the effect of optimizing thermodynamic performance and reducing combustion duration

Inactive Publication Date: 2009-09-09
WAERTSILAE SCHWEIZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latter may be acceptable for transitional conditions, however, if continuous operation is required within the mentioned load range, the risk of component failure is expected to increase and the TBO (Between Overhaul) will be reduced

Method used

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  • A method for the operation of a longitudinally scavenged two-stroke large diesel engine and a longitudinally scavenged two stroke large diesel engine
  • A method for the operation of a longitudinally scavenged two-stroke large diesel engine and a longitudinally scavenged two stroke large diesel engine
  • A method for the operation of a longitudinally scavenged two-stroke large diesel engine and a longitudinally scavenged two stroke large diesel engine

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Embodiment Construction

[0044] To explain the collaboration of different components, figure 1 The schematic design of the exhaust-gas turbocharger system of a large diesel engine known from the state of the art, which forms a two-stroke large diesel engine with longitudinal scavenging, is shown schematically. Below, according to figure 1 A large diesel engine known from the state of the art is designated with reference 1'.

[0045] In order to clearly distinguish the embodiments of the present invention from those of the prior art, the references of the prior art embodiments are quoted, while the references of features related to specific embodiments according to the present invention are not.

[0046] A large diesel engine 1' known from the current state of the art generally comprises a plurality of cylinders 2' in a manner known per se, which cylinders have outlet valves 5' arranged in the cylinder heads of the cylinders 2' The piston 20' moves back and forth along the working surface between t...

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Abstract

The invention relates to a method for the operation of a longitudinally scavenged two-stroke large diesel engine (1), having a piston (20) being arranged to be movable to and fro in a cylinder (2) along a running surface between a bottom dead centre (UT) and a top dead centre (OT), wherein a fuel is fed into the cylinder (2) of the large diesel engine (1) by an injection nozzle and scavenging slots (3) are provided at an inlet region of the cylinder (2) for the supply of a predetermined amount of scavenging air (4). An outlet valve (5) is provided at a cylinder cover of the cylinder (2) for the expulsion of a combustion gas (6), wherein, in said method, a fresh air (7) available at an environmental pressure is sucked in by a first exhaust gas turbocharger (8, 81) and / or by a second exhaust gas turbocharger (8, 82) and said fresh air (7) is supplied to the cylinder (2) as the scavenging air (4) at a predetermined charge air pressure via the scavenging slots (3), so that an ignition gas mixture is generated in the cylinder (2) from the scavenging air (4) and the fuel.

Description

technical field [0001] According to the preamble of independent claim 1 and independent claim 11, the invention relates to a method for operating a longitudinally scavenged two-stroke large diesel engine, and to a longitudinally scavenged two-stroke large diesel engine. Background technique [0002] In order to increase the power of reciprocating piston internal combustion engines such as large diesel engines for ships or for stationary installations for generating electrical energy, fresh air under pressure is introduced into the cylinders of the combustion engine after the combustion stroke through a charging group, The charging group is usually designed as a kind of exhaust turbocharger. In this regard, part of the thermal energy of the exhaust gas leaving the combustion chamber of the cylinder after the combustion stroke can be utilized. For this purpose, hot gases are transferred from the combustion chamber of the cylinder into the charge group by opening the outlet va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B25/04F01N13/10
CPCF02B25/04F02B37/002F02D41/0007F02D2400/04Y02T10/144F02B37/007F02B37/001F02B37/22F02B2075/025Y02T10/12F21S9/035F21L4/08
Inventor S·K·南达
Owner WAERTSILAE SCHWEIZ AG
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