A closed-loop control strategy based on cylinder temperature of a natural gas engine
XU Kaifeng
Abstract：In response to the high failure rate of oxygen sensors and unstable engine control in natural gas engines with closed-loop control of air-fuel ratio,a new closed-loop control strategy based on cylinder temperature without the constraint of oxygen sensors is designed for a V-type 20 cylinders nature gas engine.The cylinder temperature control structure is analyzed,a closed-loop control model and control strategy based on cylinder temperature are designed,the engine control parameters are calibrated and verified by engine operation tests.The experimental results show that with the closed-loop control based on cylinder temperature,under the same ignition advance angle,the engine calibration power reaches 1 900 kW,the average exhaust temperature of each cylinder decreases from 630 ℃ to 623 ℃,and the thermal efficiency increases from 41.6％ to 42.15％when the power is 1 900 kW.The closed-loop control strategy based on cylinder temperature is effective,which improves the stability of natural gas engine control and enhances overall performance.
Keywords：nature gas enginecontrol systemcylinder temperatureclosed-loop correctioncalibration
Publication Date：2025-03-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 53-59 )