An optimal research for diesel engine using biofuels fuel when considering the effects of the change of parameters on ECU

Abstract

In a diesel fuel system, the Electronic Control Unit (ECU) is the brain that controls all the operations of the system and the entire engine. The basis for ECU operation is a set of adjustment parameters data set in the engine research and development process, called standard data set, integrated in ECU. However, the method of building a standard dataset is often a technological secret of the manufacturer, so it is not published and difficult to access. In addition, studies using alternative fuels or biofuels on diesel engines are seen as an inevitable result of the risk of exhaustion of fossil fuels and the risk of environmental pollution due to engine emissions. Therefore, studies to optimize the parameters of ECU to use efficiently and sustainably biofuel on diesel engines are very urgent. The paper investigates the influence of parameters in ECU on the optimization function of a diesel engine with biofuel in different concentrations by computer simulation. In order to achieve this goal, a model in the AVL Boost software for a single- cylinder engine was used in conjunction with an ECU device that controls fuel injection by loading the input database (map). After computer simulation, the optimization of the fuel injection process with ECU parameters was obtained to obtain the same results from the combustion process for each type of biodiesel. Engine performance is assessed based on the amount of heat generated from combustion in the cylinder, comparing the properties of the fuel mixture used in the simulation. The increase in the amount of heat emitted from the combustion process is set by the parameters of the ECU that increase the fuel injection volume by increasing the injection time.