Optimization of a Fuel Injection System for Diesel and Biodiesel Usage

Abstract

This paper presents an optimization procedure of a fuel injection system of a bus diesel engine. Attention is focused on the differences resulting from using two different types of fuel: diesel and biodiesel. The proposed design procedure relies on the assumption that the atomization of fuel spray influences the diesel engine performance, fuel consumption, and harmful emission significantly. As a measure of spray atomization, the Sauter mean diameter is employed and introduced into the objective function. The design problem is formulated in the form of a multiobjective optimization problem, taking into account the ESC 13 mode test for diesel engines of commercial vehicles. The design variables of the injection system are related to the shape of the cam profile, to the nozzle geometry, and to the control parameters influencing the injection quantity and timing. The geometrical properties of the cam profile and the injection parameters are kept within acceptable limits by the imposed constraints. The results of optimization using diesel and biodiesel are compared to each other to show the influence of fuel type on final design and performance of the system.

A Review on Atomization and Sprays of Biofuels for IC Engine Applications

“…Thus, appropriate changes may be required to the injection system components to compensate for the negative impact of using biodiesels. Similar conclusions were also reported in a study concerned with optimizing the injection system components for diesel and biodiesel by Kelg et al [37]. The optimum cam profile for diesel and biodiesel are reported to be different.…”

Synthesis and characterization of biodiesel from Aamla oil: A promoting non-edible oil source for bioenergy industry

“…1:8%), but increases its volatility. The biofuel density, strong velocity and bulk elasticity affect the injection characteristics [44,45], worth to note that the presence of oxygen enhances the combustion process in an engine. Further, biodiesel having both the high Flash Point and cetane number increases the ignition quality of biodiesel but without any harmful effect.…”

Diesel Engine Characteristics

“…Furthermore, d 32 can also be estimated by many other simplified expressions. One of these is the well-known Hiroyasu and Kadota formula (Aigal 2003;Kegl et al 2008):…”