Dual fuel engine combustion closed-loop control method based on analysis of heat release rate

Abstract

The invention relates to a dual fuel engine combustion closed-loop control method based on an analysis of a heat release rate. The dual fuel engine combustion closed-loop control method based on the analysis of the heat release rate includes the steps that a parameter of a dual fuel engine is measured through a sensor; a cylinder pressure is used for inputting and calculating the heat release rate of each air cylinder through a heat release rate calculating method aimed at the dual fuel engine; the heat release rate character is analyzed according to test signals of the rotating speed, the knock and the inlet and exhaust gas temperature of an engine; optimal control is conducted on each air cylinder according to analysis results. According to the dual fuel engine combustion closed-loop control method based on the analysis of the heat release rate, the optimal control is conducted on engine combustion process through detection of the dual fuel engine and calculating of the heat release rate, the method can not only optimize dynamic property, economy and emission characters of the dual fuel engine and improve the utilization rate of fuel and at the same time can reduce the work inhomogeneity between each cylinder, so that the engine operation is more stable, and the service life is prolonged.

Description

technical field [0001] The invention relates to a dual-fuel engine combustion closed-loop control method based on heat release rate analysis. Background technique [0002] With the increasingly prominent problems of energy shortage and environmental pollution, the implementation of energy diversification strategy and the development of new energy technologies have become an inevitable trend of future development. Natural gas is the most abundant primary energy among all alternative energy sources, and it burns very cleanly. It is an alternative to petroleum. the most ideal solution. [0003] However, simple fuel substitution cannot improve the utilization rate of energy, so it is necessary to analyze and optimize the control of the combustion process of the engine. The heat release rate is a physical quantity that describes the amount of heat released by fuel combustion per unit crankshaft angle in the engine cylinder. Through the analysis of the combustion heat release ra...

AI Technical Summary

Problems solved by technology

Although this control method is simple and easy, and can have high speed control accuracy according to the control algorithm, it cannot consider and control the combustion characteristics in the cylinder and the working characteristics of different cylinders.

The uniformity, power and emissions of each cylinder are reduced

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