Analysis of injection rate characteristics of fuel injection systems in IDI diesel engines using an enhanced numerical simulation code |
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| Institution: | 1. Department of Mechanical Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon, Republic of Korea;2. Product Design Team 2, HYUNDAI KEFICO Corp., 102 Gosan-ro, Gunpo-si, Republic of Korea;1. Universidad de Castilla-La Mancha, Campus de Excelencia Internacional en Energía y Medioambiente, Instituto de Investigación Aplicada a la Industria Aeronáutica, Escuela de Ingeniería Minera e Industrial de Almadén, Almadén, Spain;2. Carrera Ingeniería Automotriz, Universidad Politécnica Salesiana, Rumichaca y Morán Valverde, Quito 170606, Ecuador;3. Universidad de Castilla-La Mancha, Campus de Excelencia Internacional en Energía y Medioambiente, Instituto de Investigación Aplicada a la Industria Aeronáutica, Escuela de Ingeniería Industrial y Aeroespacial de Toledo, Toledo, Spain;1. Inha University, Republic of Korea;2. National Institute of Advanced Industrial Science and Technology, Japan;3. Isuzu Motors Ltd., 8 Tsuchidana, Fujisawa, Kanagawa, 252-0881, Japan |
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| Abstract: | A fuel injection simulation code was developed with an approximate lumped-parameter network scheme. This code has many improvements for obtaining better computational accuracy. These include a new iteration approach, a nonuniform dividing method of injection pipe, a large number of injection system elements and consideration of kinematic viscosity of the fuel and its flow resistance through the injector during the throttling period. This simulation code was used to evaluate various control systems of injection rate for IDI diesel engines. Based on the results, a comparison was carried out among control characteristics of fuel injection rate of these systems, and clear correlation was shown between operating conditions of the injection pump and injection rates. |
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