Residual gas composition control of internal combustion engine with exhaust gas recirculation

An exhaust gas recirculation, internal combustion engine technology, applied in engine control, internal combustion piston engine, combustion engine, etc., can solve problems such as increased system complexity, high follow-up costs, increased fuel consumption and technical support costs

Inactive Publication Date: 2010-06-16
FORD GLOBAL TECH LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these technologies require considerable material costs and development costs, which increase the complexity of

Method used

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  • Residual gas composition control of internal combustion engine with exhaust gas recirculation
  • Residual gas composition control of internal combustion engine with exhaust gas recirculation
  • Residual gas composition control of internal combustion engine with exhaust gas recirculation

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Embodiment Construction

[0087] The present invention will be explained below based on exemplary embodiments with reference to the accompanying drawings.

[0088] figure 1 A flow diagram of a preferred refinement of the method according to the invention is shown.

[0089] In the first step S1 of the method, the measured values ​​are preferably recorded and the residual gas composition r_FracBrntCyl in the cylinder at the end of the combustion process is determined according to the first equation (1):

[0090] r_FracBrntCyl=(m_GasCyl*r_FracBrntIntk+m_FuInj*r_FracBrntFuInj*(1+r_PhiStoich)) / (m_GasCyl+m_FuInj) (1)

[0091] In the second step S2 of the method, the residual gas composition r_FracBrntIntk in the intake manifold is preferably determined according to the second equation (2):

[0092] r_FracBrntIntk=r_FracBrntCyl*(1+m_FuInj / m_GasCyl)-(1+r_PhiStoich)*r_FracBrntFuInj*m_FuInj / m_GasCyl (2)

[0093] In the third step S3 of the method, the mass m_GasCyl of gas introduced into the cylinder consisti...

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Abstract

The present invention relates to a method for adjusting and/or controlling the exhaust gas recirculation of internal combustion engine through adjusting the composition of residual gas. The engine comprises at least one cylinder, an intake manifold, and an exhaust gas system with exhaust gas recirculation. The method comprises determining and/or detecting the mass of fuel required in the filling process of each cylinder and the mass of air-gas mixture. According to the invention, the residual gas mass composition (r-FracBrntIntk) in the intake manifold is adjusted and/or controlled with a mode that a required preset and/or presettable residual gas mass flow (r_end) is obtained in each cylinder. In the adjustment and/or control, the injection fuel mass (m_FuInj) which is determined and/or detected in each cylinder before the combustion process is considered. The method of the invention can realize utilization which is more effective than recirculation exhaust and more sufficiently combustion.

Description

【Technical field】 [0001] The invention relates to regulating and / or controlling exhaust gas recirculation of an internal combustion engine by regulating the residual gas composition and to a control unit for regulating and / or controlling exhaust gas recirculation by regulating the residual gas composition of an internal combustion engine. 【Background technique】 [0002] It is well known that as the number of vehicles grows, the rules governing the exhaust emissions of internal combustion engines are constantly being strengthened, such as the EURO 6 standard in Europe, or the Tier 2 standard or Bin 5 standard in the United States. Some manufacturers prefer to use multiple ignition strategies such as Homogeneous Charge Compression Ignition (HCCI) or active aftertreatment devices such as NOx (nitrogen oxide) separators or Selective Catalytic Reduction (SCR) catalytic Converter. However, these techniques require considerable material costs and development costs, which increase ...

Claims

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Application Information

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IPC IPC(8): F02D41/00F02M25/07
CPCF02D41/006F02D2200/0411F02D41/0072F02D2200/0406F02D41/0062F02D2200/0402Y02T10/47F02M25/0755F02M26/46Y02T10/40
Inventor Y·雅库珀
Owner FORD GLOBAL TECH LLC
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