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Effects of Intake Temperature and Intake Pressure on Combustion and Exhaust Emissions of HCCI Engine

Authors: Omri Ahmed, Fridhi Hadia, Soua Wadhah, Hidouri Ammar


In this paper, the effect of the intake temperature (IT) and intake pressure (IP) on ignition timing and pollutants emission of Homogeneous Charge Compression Ignition (HCCI) engine is investigated. Numerical computations are performed using the CHEMKIN computer code. The numerical temperature obtained using different boundary conditions is compared to published data and a good agreement is assigned. Results show that the HCCI combustion engine is significantly improved by increasing the IT. With a value of IT lower than 390 K, combustion cannot occur. However, with an IT greater than 420 K, the cylinder pressure decreases. An optimum crank rotation angle is achieved by using IT of 420 K. So, we can conclude that the variation of the IT and IP influence notably the emission concentration.

Keywords: intake temperature, intake pressure, HCCI engine, CEMKIN

Digital Object Identifier (DOI):

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