Abstract
In this study, a novel injector driving circuit was developed to achieve the regulation of fuel injection quantity and to work with the engine control system in a vehicle. The main purpose of the proposed injector driving circuit is to control the quantity and timing of fuel injection within the gasoline direct injection (GDI) fuel injector system. In this paper, a mathematical state model of a high-pressure (H.P.) fuel injector system is derived and the improved Taguchi method is proposed to define the optimal operating parameter settings of a fuel injector system. The experiments on fuel injection quantity were performed to achieve the requirements of the injector driving circuit. The fuel quantity sprayed from a fuel injector system under these control parameters was analyzed by leading the design of experiments. The S/N and β slopes were analyzed to determine their optimal control settings. The H.P. injector driving circuit developed was designed to drive the fuel injector and spray the injected quantity of fuel into the flask following the optimized control factors. The experimental results demonstrate that the H.P. fuel injecting system exhibits better and more stable operating performance, to assure the accurate injection quantity for the GDI injector, and it was also realized with low cost metal oxide semiconductor field effect transistor (MOSFET) switches.
Highlights
Gasoline direct injection (GDI) technology operates in a mode that directly injects fuel into the cylinder and ignites the fuel
An experimental result shows that the current drive circuit is a feasible and reliable option to use for practical injector application in the gasoline direct injection (GDI) engines
A superior H.P. injector driving circuit introduced into engines that are modified to inject gasoline directly into the combustion chamber was developed by using the Taguchi method in the optimization of the H.P. fuel injecting system
Summary
Gasoline direct injection (GDI) technology operates in a mode that directly injects fuel into the cylinder and ignites the fuel. A high-pressure GDI injector drive was developed to implement the fuel injection quantity for a 500cc motorbike engine. An experimental result shows that the current drive circuit is a feasible and reliable option to use for practical injector application in the GDI engines. It worked successfully and efficiently and was compatible with the high-pressure (H.P.) injector. A superior H.P. injector driving circuit introduced into engines that are modified to inject gasoline directly into the combustion chamber was developed by using the Taguchi method in the optimization of the H.P. fuel injecting system.
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