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首页> 外文会议>Electronic engine controls, 2009 >Identification and Robust Control of LPG Fuel Supply System
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Identification and Robust Control of LPG Fuel Supply System

机译：液化石油气燃料供应系统的识别和鲁棒控制

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This paper proposes a new returnless LPG fuel supply system designed to increase the efficiency of current LPG engines. With a conventional engine fuel supply system, the fuel pump is driven at a certain speed to pressurize the fuel to an excessive level, and excess fuel that is discharged from the fuel pump but not injected from the injector is returned to the fuel tank via a pressure regulator and a return line. This arrangement keeps the pressure in the fuel supply line at a constant level. Accordingly, during engine idling, fuel cut-off or other times when very little or no fuel is injected from the injector, nearly all the fuel discharged from the fuel pump is returned to the fuel tank via the pressure regulator and return line. Therefore, the energy (electric power) applied to drive the fuel pump is wastefully consumed. Moreover, returning a large amount of excess fuel to the fuel tank can raise the fuel temperature in the tank, causing the fuel to evaporate. To avoid that problem, it is necessary to raise the pressure in the tank to an excessive level, especially when using fuel that evaporates easily. In addition, if the fuel pressure could be controlled at a lower pump speed, it would cause less component wear and have a good effect on equipment durability compared with the situation where the fuel pump is operated at high speed all the time.As a solution to this issue, this paper proposes a returnless fuel supply control system that does not use a pressure regulator or a return line. This system maintains a constant pressure in the fuel supply line by controlling the fuel pump so that it supplies only the quantity of fuel needed to meet the injection quantity that the engine demands from the injector. The modeling of the fuel supply system is described first along with the system identification based on the use of a genetic algorithm (GA). The system was configured by designing a robust sliding mode controller in relation to the identified nonlinear system. Simulations and experiments conducted with the control system showed that it provides excellent control performance as planned, with good agreement seen between the simulation and experimental data. That agreement confirmed the validity of the modeling method. The results also verified that this fuel supply control system saves needless energy consumption, especially under conditions of low engine output such as when idling. As a result, it works to improve the efficiency of the overall engine system.
机译：本文提出了一种新的可循环式LPG燃料供应系统，旨在提高当前LPG发动机的效率。在传统的发动机燃料供应系统中，燃料泵以一定的速度驱动以将燃料加压到过高的水平，并且从燃料泵排出但未从喷射器喷射出的过量燃料通过油箱返回至燃料箱。压力调节器和回油管。这种布置将燃料供应管线中的压力保持在恒定水平。因此，在发动机空转，燃料切断或其他很少或没有从喷射器喷射燃料的时间期间，几乎所有从燃料泵排出的燃料都通过压力调节器和返回管线返回到燃料箱。因此，浪费地消耗了用于驱动燃料泵的能量（电力）。而且，将大量的过量燃料返回到燃料箱中会升高燃料箱中的燃料温度，从而导致燃料蒸发。为了避免该问题，必须将油箱中的压力升高到过高的水平，尤其是在使用容易蒸发的燃料时。此外，如果可以将燃油压力控制在较低的泵速下，则与始终保持高速运转的燃油泵相比，这样可以减少部件磨损并对设备的耐用性产生良好的影响。针对这个问题，本文提出了一种不使用压力调节器或回油管的无回油供应控制系统。该系统通过控制燃油泵来维持燃油供应管路中的恒定压力，以便它仅供应满足发动机从喷油器要求的喷油量所需的燃油量。首先描述燃料供应系统的建模以及基于遗传算法（GA）的系统识别。该系统是通过针对所识别的非线性系统设计鲁棒滑模控制器来配置的。用控制系统进行的仿真和实验表明，该系统可按计划提供出色的控制性能，并且在仿真和实验数据之间具有良好的一致性。该协议证实了建模方法的有效性。结果还证明，这种燃油供应控制系统节省了不必要的能源消耗，尤其是在发动机输出功率较低的情况下，例如空转时。结果，它可以提高整个发动机系统的效率。

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