Alcohol hydrogen engine system and control method

By using the method of producing hydrogen online with an alcohol hydrogen engine and NH3 urea aqueous solution in the engine system, the problems of poor cold start performance of methanol engine and complexity and inefficiency of NH3-SCR system are solved, and efficient hydrogen and methanol blending combustion is achieved, improving the thermal efficiency and overall performance of the engine.

CN119712359APending Publication Date: 2025-03-28TIANJIN JINLIYAN AUTOMOTIVE ENG&TECH CO LTD
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Patent Information

Application Number
CN202411720430.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-28
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

Methanol engines have poor cold start performance in low temperature environments, and the existing NH3-SCR system has problems of complexity and inefficiency of the urea supply system.

Method used

The alcohol hydrogen engine system is adopted, combined with the method of producing hydrogen online with NH3 urea aqueous solution, hydrogen is provided through a hydrogen-rich gas storage tank, and the NH3 reforming hydrogen production device is heated by using the methanol heater and engine exhaust gas heat to achieve different proportions of hydrogen and methanol blending combustion.

Benefits of technology

It effectively solves the cold start problem of methanol engine, improves the thermal efficiency of the engine, and increases the fuel calorific value by recovering waste heat, improving the overall performance of the engine.

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Abstract

The invention discloses an alcohol hydrogen engine system and a control method. The engine system comprises an engine, a methanol box, a methanol pump, a methanol heater, an NH3 reforming hydrogen production device, a hydrogen-rich gas storage tank, a urea box, a urea pump and an SCR aftertreatment system. The engine nozzle is a coaxial double-channel hydrogen and methanol nozzle, injection of two kinds of fuel can be achieved through one nozzle, and flexible control over different proportions of hydrogen and methanol can be achieved in the same combustion cycle. According to the method, the mode that the NH3 urea water solution is used for online preparation of hydrogen and liquid methanol for mixed combustion is adopted, the cold start problem of the methanol engine is solved, meanwhile, engine waste heat is effectively recycled, the fuel heat value grade is improved, and then the engine heat efficiency is improved; and the combustion speed can be effectively increased by adopting hydrogen gas to assist combustion, so that the heat efficiency of the engine is improved.
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