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Longitudinally wound two-stroke diesel motor and method for operating the same

A diesel engine and stroke technology, applied in electrical control, mechanical equipment, engine control, etc., can solve problems such as increased combustion temperature, possibility of major failures, and high operating costs

Inactive Publication Date: 2008-08-20
WAERTSILAE SCHWEIZ AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, this also leads to a certain increase in the combustion temperature, so that even in this solution water must also be injected into the combustion chamber, because otherwise there will be a greater thermal load on the engine and its components, which again leads to Shorter service intervals, greater probability of failure in operation and ultimately higher operating costs

Method used

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  • Longitudinally wound two-stroke diesel motor and method for operating the same

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Embodiment Construction

[0043] In order to explain the cooperation of the different components, Figure 1 shows schematically the principle structure of an exhaust gas turbocharger system of a large diesel engine according to the invention, which is formed as a two-stroke large diesel engine with longitudinal scavenging, and which is presented throughout the following Use the label 1 to refer to.

[0044] A large diesel engine 1 generally comprises, in a manner known per se, a plurality of cylinders 3 with exhaust valves 7 arranged in a cylinder head 5, and wherein a piston 300 is arranged between bottom dead center UT and top dead center OT along the running surface Move back and forth in cylinder 3. The cylinder walls of the cylinder 3 with the cylinder head 5 and the piston 300 delimit the combustion space of the cylinder 3 in a known manner. A plurality of scavenging air openings 4 designed as scavenging air slots 4 are arranged in the intake region 2 of the cylinder 3 . The scavenging slot 4 is...

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Abstract

The invention relates to a longitudinally scavenged two-stroke large diesel engine (1) and an operation method thereof. In this method, a scavenging slot (4) for supply of a predetermined amount of scavenging air is provided at an intake region (2) of a cylinder (3), and an exhaust slot (4) for the discharge of combustion gas (6) The air valve (7) is provided at the cylinder head (5) of the cylinder (3). In the method of the invention, fresh air (8) available at ambient pressure (P0) is sucked in via the exhaust gas turbocharger (9) and used as scavenging air (10) at a predetermined fill air pressure (PL ) is fed into the cylinder (3) via the scavenging slot (4), so that an ignition gas mixture (11) is produced in the cylinder (3) from the scavenging air (10) and the combustion gas (6). According to the invention, pressure increasing means (12, 121) are provided for increasing the filling air pressure (PL), and the volume-reduced scavenging air (VL) is supplied to the cylinder at an increased filling air pressure (PL) (3) in.

Description

technical field [0001] According to the preamble characterizing parts of independent claim 1 and independent claim 9, the present invention relates to a method for the operation of a longitudinally scavenged two-stroke large diesel engine, and a longitudinally scavenged two-stroke large diesel engine. Gas large diesel engine. Background technique [0002] In order to increase the power of reciprocating piston internal combustion engines such as large diesel engines, for example for ships or stationary installations for generating electrical energy, after the combustion stroke the fresh air is pumped under increased pressure by means of an intake group usually designed as an exhaust gas turbocharger directed into the cylinders of the combustion engine. Part of the thermal energy of the exhaust gas leaving the combustion chamber of the cylinder after the combustion stroke can be fully utilized in this relationship. For this purpose, by opening the exhaust valves, hot gases l...

Claims

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Application Information

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IPC IPC(8): F02B25/02F02B25/04F02B37/22F02B29/04
CPCF02B3/06F02B25/04F02D2400/04F02D41/0007Y02T10/144F02B2075/025F02B37/22F02B29/0406Y02T10/12F02B37/00F02B37/12F02B25/02
Inventor T·哈尼
Owner WAERTSILAE SCHWEIZ AG
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