This paper has proposed a high efficiency engine control system, obtained by applying a modelling method and a model-based control system design method to a liquid LPG fuel injection system. This control system varies the target value of the fuel injection pressure to match the fuel temperature, which changes primarily according to the fuel injection conditions. As a result, the control system markedly reduces the energy consumption of the fuel pump drive motor during high-speed engine operation, thereby improving overall engine efficiency. Specifically, a method of applying robust sliding mode control, based on a model-based control system, has been proposed here for constructing the fuel supply system. Simulations and experiments were conducted to confirm the validity of this proposed control method. For comparison, experiments were also conducted with a conventional fuel injection pressure control system that controls the pressure to a constant level. A comparison of the current applied to the fuel pump drive motor confirmed that the proposed control method improves the efficiency of the entire engine system. In future work, the authors plan to model the entire engine system, including the ignition and fueling systems, identify the system parametrs, and on that basis develop an optimum design for the engine control system. Simulations and experiments will then be conducted to examine the control system design and performance. This study was conducted as part of a project to develop and implement fuel-saving LPG engine systems, which has been commissioned by the New Energy and Industrial Technology Development Organization (NEDO). The authors acknowledge the cooperation and assistance received.
Research and development of a liquid fuel injection LPG engine system based on the gasoline engine (2nd report) - optimization of an LPG fuel supply system
Forschung und Entwicklung eines Kraftstoffeinspritzsystems bei einem Flüssigerdölgas-Motor auf Benzinmotor-Basis (2. Bericht) - Optimierung einer Flüssigerdölgas-Kraftstoffzufuhr
Review of Automotive Engineering (JSAE) ; 30 , 2 ; 113-119
2009
7 Seiten, 11 Bilder, 13 Quellen
Article (Journal)
English
Autogasanlage , Propan-Butan-Flüssiggas , Anwendung im Motorenbau , Report (Forschungsbericht) , Kraftstoffzufuhr , Kraftstoffeinspritzung , Regelungsentwurf , Wirkungsgrad , Modellbildung , Modellentwicklung , strukturvariable Regelung , Motorsteuerung , Kraftstofftemperatur , Motordrehzahl , Energieverbrauch , Kraftstoffpumpe , Rechnersimulation , Kraftstoffeinsparung , Bewegungsgleichung , Reibung , mathematisches Modell
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