Natural gas-diesel oil injection switching control system of dual-fuel diesel engine

By collecting and processing engine parameters in real time, the optimal fuel substitution rate time-series trajectory is generated, which solves the problem of inaccurate fuel ratio adjustment in dual-fuel diesel engines, improves fuel utilization efficiency and engine stability, and reduces pollutant emissions.

CN121611549APending Publication Date: 2026-03-06WUXI WEIBO AUTOMOBILE TECH CO LTD
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Patent Information

Application Number
CN202511858893.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-10
Publication Date
2026-03-06

AI Technical Summary

Technical Problem

In existing dual-fuel diesel engines, the natural gas-diesel injection switching control is inaccurate, resulting in low fuel utilization efficiency, poor engine performance and working stability, inability to adjust the fuel ratio according to different operating conditions, and failure to effectively reduce pollutant emissions.

Method used

Employing a data acquisition and monitoring module, a fuel analysis module, a control optimization module, and a predictive control module, the system generates an optimal fuel substitution rate time-series trajectory by real-time acquisition and preprocessing of engine parameters, combined with intelligent algorithms and the ideal gas law, thereby driving the dual-fuel injectors to perform gradual switching control.

Benefits of technology

It enables precise adjustment of fuel ratio under different operating conditions, improves fuel utilization efficiency, ensures stable engine energy supply, reduces pollutant emissions, and enhances overall engine performance and operational stability.

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Abstract

The invention discloses a natural gas-diesel oil injection switching control system of a dual-fuel diesel engine, which relates to the technical field of automatic control and comprises a data acquisition monitoring module, a fuel analysis module, a prediction control module, a control optimization module and a switching protection module. Engine operation parameter data are collected in real time through an engine sensor interface and preprocessed, and fuel dynamic proportion analysis is carried out according to different rotating speeds and load intervals of an engine by taking a preset proportion as an initial reference datum and applying an intelligent algorithm; the engine can obtain the most appropriate natural gas and diesel oil mixing proportion under various working conditions, according to an ideal gas state equation, based on pressure and temperature data, monitored in real time, in a gas supply pipeline, dynamic compensation is conducted on the gas volume flow, real-time gas supply energy is calculated, the gas supply amount can be accurately controlled in the mode, and the gas supply efficiency is improved. It is guaranteed that the engine obtains stable and accurate energy supply, and therefore stable operation of the engine is maintained.
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