Experimental study on fuel injection quantity based on volume fraction of oxygen in exhaust gas
DU Qun
WANG Guodong
XU Yanjie
MA Guangying
LIANG Jianxing
Abstract：To accurately control the fuel injection amount,a method of correcting the fuel injection amount based on the oxygen volume fraction in the exhaust gas is studied.The actual fuel injection amount is calculated based on the oxygen volume fraction in the exhaust gas,excess air coefficient,and intake amount,as well as the deviation between the set fuel injection amount and the actual fuel injection amount.The fuel injection amount correction and closed-loop control are carried out,and the fuel injection amount deviation test is conducted on the engine bench to analyze the results of the fuel injector deviation test.The results show that the relative deviation of fuel injection rate under normal conditions is-2.90%to 1.00%,while the relative deviation of fuel injection rate under simulated injector wear is-3.42%to 0.83%,which is a small deviation.The method of correcting fuel injection rate based on oxygen volume fraction in exhaust gas is feasible and accurate.
Keywords：diesel engineexcess air coefficientoxygen concentrationfuel injection quantity correction
Publication Date：2023-12-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 61-64,83 )