A control device and method for an ammonia-diesel dual-fuel engine intake system

By integrating ammonia and diesel fuel supply systems, intake systems, and electronic control systems, precise control of intake airflow in the ammonia-diesel dual-fuel engine is achieved, solving the problems of low combustion efficiency and emissions pollution in ammonia-diesel engines, improving combustion performance, and reducing harmful gas emissions.

CN119664516BActive Publication Date: 2026-06-30SHANGHAI JIAOTONG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI JIAOTONG UNIV
Filing Date
2024-12-16
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The existing intake system of ammonia-diesel dual-fuel engine cannot adjust the intake flow according to the ammonia-diesel energy ratio, resulting in low combustion efficiency and increased emissions of unburned ammonia and nitrogen oxides.

Method used

It employs an ammonia fuel supply system, a diesel fuel supply system, an intake system, an exhaust system, and an electronic and control system. The engine operating condition is monitored in real time through sensors and actuators, and the intake flow is precisely controlled by an electronically controlled throttle valve to achieve dynamic adjustment of the ammonia-diesel energy substitution ratio.

Benefits of technology

It improves the combustion thermal efficiency of ammonia-diesel engines, reduces emissions of unburned ammonia and nitrogen oxides, and adapts to combustion requirements under different operating conditions.

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Abstract

This application discloses a control device and method for the intake system of an ammonia-diesel dual-fuel engine, relating to the field of ammonia-diesel engines. The method determines the current ammonia injection flow rate based on the ammonia temperature and pressure before injection, the ammonia nozzle's drive pulse width, and the nozzle's flow characteristics. It then controls the ammonia fuel supply system to supply ammonia based on this flow rate. The method also determines the current diesel injection flow rate based on the diesel injection pressure, the characteristics of the diesel nozzle, and the drive pulse width. Finally, it determines the ammonia-diesel energy substitution ratio based on the current diesel and ammonia injection flow rates, identifies the engine operating conditions, and obtains the required intake flow rate based on the engine operating conditions and the ammonia-diesel energy substitution ratio. The method controls the opening of two electronically controlled throttle valves based on the difference between the actual intake flow rate determined by the intake flow meter and the required intake flow rate, achieving quantitative control of the intake flow rate. This application can improve the thermal efficiency of ammonia-diesel engine combustion and reduce emissions of unburned ammonia and nitrogen oxides.
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Citation Information

Patent Citations

  • Fuel supply and control system of ammonia gas engine

    CN116428081A

  • VNT-based variable air inlet system of ammonia and diesel dual-fuel engine and control method of VNT-based variable air inlet system

    CN118911822A

  • Working balance control system of gas engine

    CN222045932U