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Internal combustion engine

A technology for an internal combustion engine and a turbine, which is applied in the field of internal combustion engines to achieve the effects of increased supercharging and high driving power/transmission power

Active Publication Date: 2012-05-23
MERCEDES BENZ GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these known solutions have disadvantages especially for the implementation of future emission limits

Method used

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  • Internal combustion engine
  • Internal combustion engine
  • Internal combustion engine

Examples

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Embodiment Construction

[0025] figure 1 Schematically shows an internal combustion engine with two-way exhaust gas recirculation, by means of which compliance with the EU6 emission limit values ​​can be achieved in a simple manner, whereas Figures 2 to 5 An operating strategy of an internal combustion engine or components of an internal combustion engine and an operating strategy of a two-way exhaust gas recirculation for achieving low emissions and low fuel consumption are shown.

[0026] figure 1 Shown is an internal combustion engine 10 designed as a diesel engine and having four cylinders 12 , 14 , 16 and 18 into which fuel is injected via a high-pressure injection system 20 . The internal combustion engine 10 includes a high-pressure exhaust-gas turbocharger 22 and a low-pressure exhaust-gas turbocharger 24 downstream of the high-pressure exhaust-gas turbocharger in series. The air drawn in by the internal combustion engine according to directional arrow 26 at its intake side 34 and filtered ...

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Abstract

The invention relates to a method for operating an internal combustion engine (10) comprising at least one exhaust gas turbocharger (22, 24), which on an exhaust-gas side (50) of the internal combustion engine (10) comprises a turbine (62, 68) through which an exhaust gas of the internal combustion engine (10) can flow, wherein depending on an operating state of the internal combustion engine (10), exhaust gas is extracted and recirculated to an intake side (34) of the internal combustion engine (10) by means of a first exhaust gas recirculation device (74), in particular a high-pressure exhaust gas recirculation (74), and / or by means of at least one further exhaust gas recirculation device (80), in particular a low-pressure exhaust gas recirculation (80), wherein a switchover limit (104) is provided in a rotational speed range of the internal combustion engine (10), at which switchover limit (104) a switchover occurs from recirculation of the exhaust gas by means of the at least one further exhaust gas recirculation device (80), in particular the low-pressure exhaust gas recirculation (80), to recirculation of the exhaust gas by means of the first, in particular the high-pressure exhaust gas recirculation (74), and by means of the at least one further exhaust gas recirculation device (74, 80), in particular the low-pressure exhaust gas recirculation (80).

Description

technical field [0001] The invention relates to a method for operating an internal combustion engine according to the preamble of claim 1 and an internal combustion engine according to the preamble of claim 13 . Background technique [0002] An internal combustion engine is known from document DE 10 2005 046 507 A1, which discloses an internal combustion engine with two exhaust-gas turbochargers connected one behind the other, wherein the exhaust gas of the internal combustion engine emerging from the exhaust line of the internal combustion engine Recirculation from the turbine upstream of the exhaust gas turbocharger close to the engine into the intake line of the internal combustion engine. [0003] Such known internal combustion engines already have good fuel consumption and emission values, but require increased costs in order to achieve the specified emission limit values ​​in the future. [0004] From US 7013879 B2 an exhaust gas recirculation system is known in which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/07F02D41/00F02B37/013
CPCF02B37/004F01N13/009F02B29/0406F01N3/021Y02T10/144F01N3/106F02B37/127F02M25/0728F02M25/0726F01N2240/36F02M25/0711F01N13/02F02M25/0707F01N3/08F02M25/0709Y02T10/121F02D41/005F02B37/18F02B37/013F01N3/103F02M25/0744F02M25/0732F02M25/0718F02M26/08F02M26/15F02M26/24F02M26/25F02M26/38F02B37/162Y02T10/12
Inventor H·拜尔F·韦盖瑙什特
Owner MERCEDES BENZ GRP
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