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Piston type internal combustion engine

A two-stroke, diesel engine technology, applied in the direction of mechanical equipment, engine operation, engine components, etc., can solve the problems of imbalance, energy consumption, and reduce the overall efficiency, and achieve the effect of favorable filling ratio, low temperature, and simplified bearings

Active Publication Date: 2008-06-04
MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the exhaust gas fraction to be mixed with charge air is cooled, energy consumption is associated with it
Reduced overall efficiency due to said disadvantages
Another disadvantage of the known device is that, when the exhaust gas recirculation device is switched off, changes in the mass flow through the engine and unbalanced conditions on the exhaust gas turbocharger can occur

Method used

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  • Piston type internal combustion engine

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The main field of application of the invention is large engines, especially two-stroke large diesel engines such as those that can be used as propulsion devices for ships and the like. The construction and principle of operation of such engines are known per se.

[0015] Shown in the drawings is a two-stroke large diesel engine 1, which comprises a plurality of cylinders 2 arranged in succession in rows, which are respectively connected to a charge air distribution pipe 4 via a pressurization pipe joint 3 and via an exhaust The pipe joint 5 is connected to an exhaust manifold 6 . Charge air distribution pipe 4 and exhaust manifold 6 consist of large diameter pipes that run the full length of the engine.

[0016] Charged air is provided by an exhaust gas turbocharger 7, whose turbine 8 can be supplied with exhaust gas via an exhaust pipe 9 branched from the exhaust manifold 6, and whose air compressor 10 can be supplied with pressurized air via an air supply pipe 11. T...

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PUM

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Abstract

A reciprocating internal combustion engine comprises a cylinder(2) connected to a charging distributor(4) and an exhaust manifold(6), an exhaust gas turbocharger(7) operating by using exhaust gas from the exhaust manifold and compressing air to the charging distributor, an exhaust gas re-circulation system(16) mixing exhaust gas from the exhaust manifold with air from the exhaust gas turbocharger, and a compressor(20) flowing exhaust gas mixed with air. The compressor is driven by a turbine(19), and the turbine is operated by driving air. Driving air is branched from compressed air by the exhaust gas turbocharger, and heated by exhaust gas while cooling re-circulation exhaust gas.

Description

technical field [0001] The invention relates to a piston type internal combustion engine, in particular to a large two-stroke diesel engine. Background technique [0002] It is always desirable to reduce the NOx content in the exhaust gas by mixing the exhaust gas fraction with the charge air. In known devices of the type mentioned at the outset, the compressor which drives the exhaust gas fraction to be mixed with the charge air can be driven by means of a drive which consumes additional energy. Such additional energy consumption can exceed 1.5% of the producible energy in a two-stroke large diesel engine. If the exhaust gas fraction to be mixed with charge air is cooled, energy consumption is associated with it. The overall efficiency is thus reduced due to said disadvantages. A further disadvantage of the known device is that, when the exhaust gas recirculation device is switched off, changes in the mass flow through the engine and unbalanced conditions at the exhaust ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B47/08F02M25/07F02B41/10F02B37/00F02B29/04F02B37/04F02B39/10
CPCF02B37/164F02M25/0781F02M25/0739F02M25/073F02B37/04F02M25/0746Y02T10/144Y02T10/146F02M25/0707F02B39/10F02B29/0468Y02T10/121F02B29/0425F02M25/0713F02M26/05F02M26/10F02M26/27F02M26/34F02M26/40F02M26/61Y02T10/12F02B37/00
Inventor 彼得·贝格-松内
Owner MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND