Abstract
The fuel injection system is one of the key components of an in-cylinder direct injection engine. Its performance directly affects the economy, power and emission of the engine. Previous research found that the Taguchi method can be used to optimize the fuel injection map and operation parameters of the injection system. The electronic control injector was able to steadily control the operation performance of a high-pressure fuel injection system, but its control was not accurate enough. This paper conducts an experimental analysis for the fuel injection quantity of DI injectors using the Taguchi-Regression approach, and provides a decision-making analysis to improve the design of electronic elements for the driving circuit. In order to develop a more stable and energy-saving driver, a functional experiment was carried out. The hybrid Taguchi-regression algorithm for injection quantity of a direct injection injector was examined to verify the feasibility of the proposed algorithm. This paper also introduces the development of a high-pressure fuel injection system and provides a new theoretical basis for optimizing the performance of an in-cylinder gasoline direct injection engine. Finally, a simulation study for the fuel injection control system was carried out under the environment of MATLAB/Simulink to validate the theoretical concepts.
Highlights
The fuel injection system is the key module of automotive gasoline direct-injection (GDI) engines
The experiment objective was to optimize the twice injection time and injection ratio by using a Taguchi experiment design method under this working condition. This was combined with the analysis of variance (ANOVA) method to analyze the contribution rate of twice injection time and injection ratio to fuel injection quantity
The stability of the circuit was examined for the injection accuracy of a spray nozzle, carefully recording the correction of each fuel injection quantity by adjusting the parameter settings of high-pressure nozzle drive to carry out functional testing step by step
Summary
With increasing shortage of energy and deterioration of the environment in the twenty-first century, the main goal of direct-injection (DI) engine development is to achieve energy conservation and low pollution [1]. The fuel injection system is the key module of automotive gasoline direct-injection (GDI) engines. This is the core technical problem that needs to be overcome in the development of GDI engines [3]. The high-pressure fuel injection system of a GDI engine is a complex system with coupling of electric, magnetic, mechanical and hydraulic physical fields. According to different operating conditions, the speed and load of the GDI engine are used as the basic signals to achieve its actual working conditions.
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