Method and device for operating an internal combustion engine with exhaust gas recirculation

A technology for exhaust gas recirculation and internal combustion engines, which is applied in the direction of exhaust gas recirculation, internal combustion piston engines, combustion engines, etc., and can solve problems such as torque power reduction, fuel injection torque increase process slowdown, and harmful emission deterioration. , to achieve the effect of improving the formation of boost pressure

Active Publication Date: 2020-07-03
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For systems with only one high-pressure exhaust gas recirculation system or for operating states in which the exhaust gas recirculation system is decisively determined by the high-pressure exhaust gas recirculation system, the resulting boost pressure, the resulting additional Worsening conditions can limit the maximum possible injection quantity of fuel and thus lead to a slower increase in torque
Delayed boost pressure build-up via exhaust gas recirculation control thus leads to a marked deterioration of pollutant emissions during dynamic operation and may lead to a reduction in torque dynamics (Drehmomentdynamik)

Method used

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  • Method and device for operating an internal combustion engine with exhaust gas recirculation
  • Method and device for operating an internal combustion engine with exhaust gas recirculation
  • Method and device for operating an internal combustion engine with exhaust gas recirculation

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Embodiment Construction

[0039] figure 1 An engine system 1 is shown with an internal combustion engine 2 , which generally includes a plurality of cylinders 3 . The internal combustion engine 2 can operate according to the four-stroke principle and can be designed in particular as a fuel-using internal combustion engine, in particular as a diesel engine.

[0040] Fresh air is supplied to cylinders 3 of internal combustion engine 2 via an intake system 4 . During operation, fuel is injected into the combustion chambers of the cylinders 3 according to the load requirements, after combustion of which the combustion exhaust gases are discharged via exhaust gas outlets 5 .

[0041] An exhaust gas-driven charging device 6 is arranged in the intake system 4 and in the exhaust gas outlet 5 . The charging device 6 comprises a turbine 61 which is arranged in the exhaust gas outlet 5 and serves to convert the exhaust gas enthalpy of the combustion exhaust gas into mechanical energy. Furthermore, a compressor...

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Abstract

The invention relates to a method for operating an internal combustion engine (2) having a exhaust gas-driven supercharging device (6). The method comprises following steps: making an exhaust gas recirculation adjustment in order to be used for adjusting combustion exhaust amount recirculated in an intake system (4) and / or making an supercharge pressure adjustment in order to be used for adjusting supercharge pressure based on corresponding rated value; detecting the requirement for rapid torque; correcting rated value of exhaust gas recirculation and / or supercharge pressure adjustment based on the requirement for rapid torque in order to increase exhaust gas enthalpy of the supercharging device (6).

Description

technical field [0001] The invention relates to an internal combustion engine, in particular a fuel-using internal combustion engine with an exhaust gas recirculation system. Furthermore, the invention relates to measures for reducing pollutant emissions during dynamic operation of a supercharged internal combustion engine. Background technique [0002] For the operation of fuel-based internal combustion engines, in particular diesel engines, legal requirements for limiting the emission of pollutants must be taken into account. In particular the recirculation of combustion exhaust gases represents an important measure when implementing these requirements. [0003] Exhaust gas recirculation (AGR) basically serves to reduce the oxygen content in the cylinders of the internal combustion engine and thereby reduce the temperature generated by combustion. The generation of nitrogen oxides can thus be reduced or prevented. However, the exhaust gas recirculation leads to the gene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D43/00F02D23/00F02D21/08
CPCF02D11/105F02D21/08F02D23/00F02D41/0007F02D41/005F02D41/0072F02D41/10F02D2200/0406F02M26/05Y02T10/12Y02T10/40
Inventor J.泽勒M.巴赫纳L.佐马卡尔
Owner ROBERT BOSCH GMBH
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