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

A diesel engine, stroke technology, applied in electrical control, mechanical equipment, engine control, etc., can solve problems such as high operating costs, increased combustion temperature, and shortened service intervals

Inactive Publication Date: 2012-07-04
WAERTSILAE SCHWEIZ AG
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  • Summary
  • 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
  • Longitudinally wound two-stroke diesel motor and method for operating the same

Examples

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Embodiment Construction

[0041] To explain the cooperation of the different components, figure 1 The principle structure of an exhaust gas turbocharger system of a large diesel engine according to the invention is shown schematically, which is designed as a two-stroke large diesel engine with longitudinal scavenging, and which is designated with reference numeral 1 throughout the following text.

[0042] 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 two-stroke and large-sized diesel engine (1) scavenging air in a longitudinal direction and an operation method thereof. In the method, scavenging slots (4) supplying a predetermined amount of scavenging air are disposed in an inlet area (2) of a cylinder (3), and an outlet valve (7) for discharging combustion gas (6) is disposed to a cylinder cover (5) of the cylinder (3). In the method, fresh air (8) available at ambient pressure (P0) is sucked by an exhaust gas supercharger (9), and then is supplied at predetermined charging air pressure (PL) as scavenging air (10) to the cylinder (3) through the scavenging slots (4). Ignition gas-mixed air (11) is made in a cylinder (3) from the scavenging air (10) and combustion gas (6). Pressure increasing means (12, 121) for increasing charging air pressure (PL) are provided, and volume (VL) with reduced scavenging air is supplied to the cylinder (3) at increased charging air pressure (PL).

Description

technical field [0001] 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. 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 leave the combustion chambers of the cylinders and are delivered to the intake group. The intake group essentially consis...

Claims

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Application Information

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