Abstract
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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