International Conference


TitleHaiyun Su, Sebastian Mosbach, Markus Kraft, Amit Bhave, Sanghoon Kook, and Choongsik Bae, "Two-stage Fuel Direct Injection in a Diesel Fuelled HCCI Engine", SAE Paper 2007-01-1880 (JSAE 20077195), to be presented at SAE Fuels and Lubricants Meeting, Kyoto, Japan, 2007.

Haiyun Su, Sebastian Mosbach, Markus Kraft, Amit Bhave, Sanghoon Kook, and Choongsik Bae, “Two-stage Fuel Direct Injection in a Diesel Fuelled HCCI Engine”, SAE Paper 2007-01-1880 (JSAE 20077195), to be presented at SAE Fuels and Lubricants Meeting, Kyoto, Japan, 2007.

Abstract

Two-stage fuel direct injection (DI) has the potential to expand the operating region and control the auto-ignition timing in a Diesel fuelled homogeneous charge compression ignition (HCCI) engine. In this work, to investigate the dual-injection HCCI combustion, a stochastic reactor model, based on a probability density function (PDF) approach, is utilized. A new wall-impingement sub-model is incorporated into the stochastic spray model for direct injection. The model is then validated against measurements for combustion parameters and emissions carried out on a four stroke HCCI engine. The initial results of our numerical simulation reveal that the two-stage injection is capable of triggering the charge ignition on account of locally rich fuel parcels under certain operating conditions, and consequently extending the HCCI operating range. Furthermore, both simulated and experimental results on the effect of second injection timing on combustion indicate that there exists an optimal second injection timing to gain maximum engine output work for a given fuel split ratio.

PreviousSeoksu Moon, Jaejoon Choi, Kitae Yeom and Choongsik Bae, Measurements of Droplet Size Distribution and In-Cylinder Mixture Formation from a Slit Injector in a Direct-Injection Gasoline Engine, Third International Conference on Optical and Laser Diagnostics (ICOLAD 2007), May 2007, London, UK.
NextKitae Yeom and Choongsik Bae, “The Dual-Fueled Homogeneous Charge Compression Ignition Engine Using Liquefied Petroleum Gas and Di-methyl Ether”, 14th Asian Pacific Automotive Engineering Conference (APAC-14), August 5-8, Hollywood, California, USA, 2007 (SAE 2007-01-3619).

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