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Exhaust gas recirculation system and method, engine and use of exhaust gas recirculation system

An exhaust gas recirculation and engine technology, which is applied in the direction of exhaust gas recirculation, engine components, combustion engines, etc., can solve the problems of adjusting the cleaning amount, and achieve the effect of cleaning, high efficiency and high cooling performance

Active Publication Date: 2020-01-10
WINTERTHUR GAS & DIESEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Impossibility to adjust the cleaning volume for the desired situation

Method used

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  • Exhaust gas recirculation system and method, engine and use of exhaust gas recirculation system
  • Exhaust gas recirculation system and method, engine and use of exhaust gas recirculation system
  • Exhaust gas recirculation system and method, engine and use of exhaust gas recirculation system

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Embodiment Construction

[0114] figure 1 A schematic diagram of a first embodiment of the system 1 is shown. The system 1 for exhaust gas recirculation is arranged between the exhaust gas outlet 2 and the air inlet 3. The exhaust gas leaving the exhaust outlet 2 is partially introduced into the first turbocharger 4 that uses the exhaust gas to power the turbine, and fresh air is sucked into the compressor driven by the turbine of the first turbocharger 4 . The compressed air is introduced into the first cooler 12 and then passes through the first water mist trap 13. From the first water mist trap 13 onwards, compressed air is introduced into the mixing device 37. Another part of the exhaust gas leaving the exhaust gas outlet 2 is introduced through the second turbocharger 6, similar to the first turbocharger 4, where the exhaust gas drives the turbine. Upstream of the turbine of the second turbocharger 6, a second inlet valve 11 is arranged. The fresh air compressed by the compressor of the turboch...

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Abstract

A system (1) for exhaust gas recirculation which can be arranged between an exhaust gas outlet (2) and an air inlet (3) of an engine, preferably a two-stroke engine. The system comprises: a first turbocharger (4) in a first functional duct (5) between the exhaust outlet (2) and the air inlet (3), and comprises a connection between the exhaust outlet (2) and The second turbocharger (6) in the second functional duct (7) between the air inlets (3). The first turbocharger (4) and the second turbocharger (6) are separated and arranged in parallel, preferably the first functional pipeline (5) and the second functional pipeline (7) are separated and arranged in parallel. The system further comprises: an exhaust cleaning device (8) arranged in an air duct (9) arranged between the exhaust outlet (2) and the air inlet (3); and for A control unit controlling the functional state of said system (1). The air duct (9) is at least partially arranged in parallel with the second functional duct (7), and the control unit is configured such that the control unit control arrangement is located in the air duct (9) at the the first inlet valve (10) upstream of the exhaust gas cleaning device (8) and controls the second inlet valve (11) arranged upstream of the second turbocharger (6) such that the two inlet valves (10 , 11) can all simultaneously assume an at least partially open position.

Description

Technical field [0001] The present invention relates to an exhaust gas recirculation system, an engine, the use of the system, an exhaust gas recirculation method, and diesel engine exhaust components. Background technique [0002] The (cooled) external exhaust gas recirculation (EGR) in the intake port of diesel engines is known as a way to reduce nitrogen oxide emissions and has been implemented in automotive applications for many years. For large marine two-stroke diesel engines, this technology is still to be developed. Therefore, it is generally known to recirculate exhaust gas from the exhaust outlet of the engine back to the air inlet of the engine to optimize combustion. [0003] The use of residual fuel oil containing up to 3.5%m of sulfur will result in SOx and H from combustion products 2 Sulfuric acid (H 2 SO 4 ). The recirculation of acid exhaust gas causes corrosion of engine parts. In addition, the combustion of residual fuel produces more particulate matter (PM) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B29/04F02B33/44F02B37/00F02B37/007F01N13/00F02D21/08F02M26/08F02M26/35
CPCF02B29/0412F02B33/44F02B37/002F02B37/007F02D2021/083F02M26/08F02M26/25F02M26/34F02M26/35Y02T10/12
Inventor A·莱纳
Owner WINTERTHUR GAS & DIESEL
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