Method and system for correcting fuel injection quantity of electronic unit pump

• Main Authors: LI HONGBO, DING WANQIAO
• Format: Patent
• Language: Chinese; English
• Published: 27.05.2022
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

The invention relates to a method and system for correcting the fuel injection quantity of an electronic unit pump, and belongs to the technical field of vehicle communication. The method comprises the following steps that when an engine is in a stable working condition, the average value of oil pipe pressure peak values of multiple times of circulation of each cylinder of a monoblock pump is collected in advance, and then the average values of the peak values obtained by all the cylinders are averaged again to obtain a total cylinder peak value average value; the difference between the oil pipe pressure peak value of any cylinder and the total cylinder peak value mean value is obtained; if the absolute value of the difference value is smaller than or equal to the correction opening set threshold value, the oil injection quantity of the cylinder is not corrected; and if the absolute value of the difference value is larger than the correction opening set threshold value, the injection correction state of the c