Reverse reaction activity control compression ignition engine based on methanol dehydration reforming

Abstract

The invention provides a reverse reaction activity control compression ignition engine based on methanol dehydration reforming. The system comprises a methanol oil tank, a methanol dehydration reforming reaction system and a reverse reaction activity control compression ignition (R-RCCI) engine system, the methanol oil tank is divided into two branches which are respectively a methanol direct injection pipeline and a methanol reforming pipeline, and the methanol direct injection pipeline is communicated with the methanol reforming pipeline. The R-RCCI engine system is used for pressurizing methanol of a methanol direct injection pipeline and then directly injecting the methanol into an air cylinder of an engine through an oil injection nozzle, the methanol dehydration reforming reaction system is used for carrying out catalytic reforming reaction on the methanol, and a product obtained after the methanol catalytic reforming reaction is premixed with air and enters the air cylinder of the engine through an air inlet pipeline. The methanol is used as the only fuel, the catalytic conversion reaction of the methanol is driven by the waste heat of the tail gas, and the dimethyl ether is prepared by dehydrating and reforming the methanol, so that the conversion from the low-activity fuel to the high-activity fuel is realized. The problem of fuel adding is solved, and meanwhile the heat efficiency of an engine system is improved through tail gas waste heat.

Description

technical field [0001] The invention relates to the technical field of internal combustion engine structures, in particular to a reverse reaction activity controlled compression ignition engine based on methanol dehydration reforming. Background technique [0002] Reactivity Controlled Compression Ignition (RCCI) is an emerging low-temperature combustion technology in the engine field. Fuel delivery strategy for port injection of low activity fuels (eg gasoline, methanol). The combustion of the engine is effectively controlled by controlling the activity of the two fuels. Compared with the traditional diesel compression ignition mode, the RCCI combustion method can effectively reduce the emission of nitrogen oxides (NOx) and soot, and the combination of the two fuels with different activities can solve the problem of uncontrollable low-temperature premixed combustion. Based on the RCCI combustion mode, a Reverse RCCI (R-RCCI) combustion mode is proposed, that is, a small a...

AI Technical Summary

Problems solved by technology

Through the joint control of the methanol reforming reactor and the engine, it provides an optimized fuel distribution scheme under different engine operating conditions, solves the problem of complex fuel addition, and at the same time realizes efficient and clean combustion of the engine system

Images