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Large turbocharged two-stroke diesel engine with exhaust gas recirculation

A technology of exhaust gas recirculation, turbocharging, applied in engine operation, combustion engine, machine/engine, etc., can solve problems such as scavenging pressure mismatch

Active Publication Date: 2012-08-01
MAN ENERGY SOLUTIONS FILIAL AF MAN ENERGY SOLUTIONS SE TYSKLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So if the turbo is matched to the engine at 40% EGR there will be a mismatch in scavenging pressure when EGR is not working

Method used

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  • Large turbocharged two-stroke diesel engine with exhaust gas recirculation
  • Large turbocharged two-stroke diesel engine with exhaust gas recirculation
  • Large turbocharged two-stroke diesel engine with exhaust gas recirculation

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Embodiment Construction

[0027] Hereinafter, the crosshead large turbocharged two-stroke diesel engine and the operating method of the crosshead large turbocharged two-stroke diesel engine according to the present invention will be described in detail through typical embodiments.

[0028] figure 1 with figure 2 A first exemplary embodiment of a large two-stroke diesel engine 1 is shown. The engine 1 can be used, for example, as the main engine of a marine vessel or as a stationary engine for operating a generator in a power station. The total output of the engine may range, for example, from 2000 kW to 110000 kW.

[0029] The engine 1 is provided with a plurality (typically between 5 and 14) of cylinders 2 arranged side by side in a row. Each cylinder 2 is provided with a reciprocating piston 3 . Piston 3 is connected to crankshaft 4 via piston rod 5 , crosshead 6 and connecting rod 7 . The crosshead 6 comprises a crosshead bearing guided between guide planes.

[0030] Each cylinder 2 is provid...

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Abstract

The invention relates to a large turbocharged two stroke diesel engine (1) of the crosshead type that is provided with an exhaust gas recirculation system (30,32) that can be activated or deactivated or can be operated with variable exhaust gas recirculation rates. In order to ensure proper matching of the turbocharger (16) , and in particular the compressor (18) of the turbocharger (16) in all operating conditions, a cylinder bypass flow path (40) that includes a controllable valve (42) enables matching the turbocharger 16 to the engine (1) in operation modes with or without exhaust gas recirculation.

Description

technical field [0001] The present invention relates to a large turbocharged two-stroke crosshead piston internal combustion engine, preferably a diesel engine with an exhaust gas purification system, especially a large crosshead two-stroke diesel engine with an exhaust gas recirculation system. Background technique [0002] Large two-stroke engines of the crosshead type are typically used in the propulsion systems of large ships or as engines in power stations. Emissions requirements have been and will become increasingly difficult to meet, especially with respect to nitrogen oxide (NOx) levels. [0003] Exhaust gas recirculation is a measure known to help reduce NOx in combustion engines. [0004] In order to meet various emission requirements, such as International Maritime Organization (IMO) Tier II and Tier III emission standards, it is advantageous to operate with an exhaust gas recirculation system in a crosshead large two-stroke diesel engine, the exhaust gas recirc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/00F02B47/08F02B75/02
CPCY02T10/121Y02T10/144Y02T10/12A42B3/066A42B3/121A42B3/125A42B3/286F04F7/02
Inventor 彼得·施约尔达格塞尔克·斯托亚科维奇金·詹森
Owner MAN ENERGY SOLUTIONS FILIAL AF MAN ENERGY SOLUTIONS SE TYSKLAND
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