Controlled Auto-Ignition Combustion in a Two-Stroke Cycle Engine Using Hot Burned Gases

Abstract:

A new combustion concept, which is viewed increasingly as a probable solution to these issues is Controlled Auto-Ignition (CAI) Combustion. In such an engine, a homogeneous mixture of air, fuel and residual gases is compressed until auto-ignition occurs. Due to its significantly low temperature combustion, NOx will be dramatically reduced while the mixture will be under ultra-lean fuel-air condition, thus able to achieve high efficiency and low emission. In the case of two-stroke engine, problem of poor combustion efficiency and excessive white smoke emission can be addressed by the incorporation some features that will ultimately convert a typical two-stroke engine into an efficient CAI engine demonstrating the best of both features. Due to its inherent high internal residual gas rate in partial load operation, the two-stroke engine has been the first application to benefit from the unconventional CAI combustion process. This paper will concisely discuss the utilization of hot burned gas for induction thus imposing a CAI combustion feature onto two-stroke cycle engine. Among the features incorporated are the increasing in the level of Exhaust gas Recirculation and cycle-by-cycle uniformity of the air-fuel ratio (AFR) supplied to cylinder, which will be crucial in creating a suitable temperature within the engine’s combustion chamber.

• Periodical: Applied Mechanics and Materials (Volume 388)
• Pages: 201-205
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.388.201
• Online since: August 2013
• Authors: Amin Mahmoudzadeh Andwari, Azhar Abdul Aziz, Muhamad Said Mohd Farid, Abdul Latiff Zulkarnain
• Keywords: Active Thermo-Atmosphere Combustion (ATAC), Auto-Ignition Temperature, Controlled Auto-Ignition (CAI), EGR, Homogeneous Charge Compression Ignition (HCCI), Two-Stroke Cycle Engine

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