(2-27) A New Concept of I. C. Engine with Homogeneous Combustion in a Porous Medium((NCS-3)Novel Combustion Systems 3-Homogeneous Charge, Premixed Charge Compression Ignition Engines)

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概要

• 論文の詳細を見る

• The advantages of homogeneous combustion in internal combustion (I. C.) engines are well known and many research groups all over the world are working on its practical realization. Recently, the present authors have proposed a new combustion concept that fulfils all requirements to perform homogeneous combustion in I. C. engines using the Porous Medium Combustion Enigine, called "PM-engine". This is an I. C. engine with the following processes realized in a porous medium : internal heat recuperation, fuel injection and vaporization, mixing with air, homogenization, 3D-thermal self-ignition followed by a homogeneous combustion. Figure 1 shows the simplest case of the operation of a PM-engine, where the PM-combustion chamber is mounted in engine head. During the intake stroke it is weak influence of the PM-heat capacitor on the in-cylinder air thermodynamic conditions. Heat exchange process (non-adiabatic compression) increases with continuing compression, and at the TDC the whole combustion air is closed in the PM volume. Near the TDC of compression the fuel is injected in to PM volume and very fast fuel vaporization and mixing with air occur in 3D-structure of PM-engine. The self-ignition process and homogeneous combustion occur in PM volume close to the TDC. The main features of the PM-engine are the following : 1) Very low emissions level due to homogeneous combustion and controlled temperature in the PM-combustion zone (e.g. NOx between 100 and 300 mg/kWh for the (A/F) ratio from 1 to 5 ;, CO can be reduced by several times ; (almost) eliminated soot formation). 2) Theoretically higher cycle efficiency due to similarity to the Carnot cycle. 3) Very low combustion noise due to significantly reduced pressure peaks. 4) Nearly constant and homogeneous combustion temperature field in the PM-volume. 5) Very fast combustion. 6) Multi-fuel system. 7) May operate with homogeneous charge : from stoichiometric to very lean mixture compositions. 8) Weak effect of in-cylinder flow structure, turbulence or spray atomization.

• 一般社団法人日本機械学会の論文
• 2001-07-01

著者

• Durst Franz

  Institute Of Fluid Mechanics (lstm) Of The Friedrich-alexander-university

• Durst Franz

  Institute Of Fluid Mechanics University Of Erlangen-nurnberg

• Weclas Miroslaw

  Invent GmbH, Development of New Technologies

• Weclas Miroslaw

  Invent Gmbh Development Of New Technologies

関連論文

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• (2-28) Zero Emission Engine : A Novel Steam Engine for Automotive Applications((NCS-3)Novel Combustion Systems 3-Homogeneous Charge, Premixed Charge Compression Ignition Engines)
• ハイパボロイド攪拌槽の乱流フローパターン
• (2-27) A New Concept of I. C. Engine with Homogeneous Combustion in a Porous Medium((NCS-3)Novel Combustion Systems 3-Homogeneous Charge, Premixed Charge Compression Ignition Engines)

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