Flexible fuel engine and control method thereof

Abstract

The invention provides a control method of a flexible fuel engine. The control method comprises the following steps: detecting the components of a gas fuel in a gas fuel storage tank; determining the control strategy of the flexible fuel engine according to the detection result, wherein the control strategy is selected from any one or a combination of a gas fuel and/or liquid fuel proportioning strategy, a gas fuel gas spray timing strategy, a gas fuel gas spray quantity strategy, a liquid fuel oil spray quantity strategy and an ignition timing strategy; and transmitting the gas fuel in the gas fuel storage tank and a liquid fuel in a liquid fuel storage tank into an air cylinder of the flexible fuel engine according to the control strategy, mixing the gas fuel with the liquid fuel and carrying out ignition burning. Correspondingly, the invention also provides a flexible fuel engine system.

Description

technical field [0001] The invention relates to the field of internal combustion engines, in particular to a control method and a corresponding system for a flexible fuel engine. Background technique [0002] With the rapid development of the automobile industry and the increasing popularity of automobiles, the consumption of traditional energy is also increasing. The fuel used in traditional internal combustion engines is usually gasoline and diesel, which rely on fossil energy. It is estimated that this energy source will be nearly exhausted in the first half of the 21st century. For example, according to the comprehensive estimation of oil reserves, the limit of disposable fossil energy is about 118-151 billion tons. Based on the calculation of the world's annual oil production of 3.32 billion tons in 1995, oil reserves will be exhausted around 2050. The interruption of fossil energy and raw material chains will inevitably lead to conflicts between countries or regions ...

AI Technical Summary

Problems solved by technology

In the current mixed-fuel internal combustion engine, the above-mentioned key parameters are all fixed (that is, the internal combustion engine cannot be adjusted according to the fuel), that is, the internal combustion engine of a car can only be powered by a fixed gaseous fuel (such as hydrogen) To achieve optimal combustion efficiency, if different types or components of gaseous fuels are replaced, problems such as insufficient combustion or lower thermal efficiency may occur due to incompatibility of combustion-related control strategies

In fact, more and more combustible gases can be used as fuel for internal combustion engines, and even a mixture of various gases can be used as the above-mentioned gas fuel. In the prior art, it is impossible to flexibly adjust key parameters according to the gas fuel composition to achieve the best in-cylinder combustion state. , which limits the range of application of mixed-fuel engines that introduce gas as fuel, hindering their further development

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