An experimental study on the inconsistency correction of cycle fuel injection quantity for electronic unit pump

作者：Wang Pei; Zhang Changling; Zhang Zheng; Liu Fushui; Sun Bogang

来源：Qiche Gongcheng/automotive Engineering, 2015, 37(11): 1260-1264 and 1283.

• Correction coefficients
• Cycle fuel injection quantities
• Electronic unit pump
• Electronic unit pump (EUP)
• Fuel injection characteristics
• Injection pressures
• Injection pulse width
• Operation conditions

The cycle fuel injection quantity of electronic unit pump (EUP) is accurately measured by using EFS Instantaneous Mono-Injector Qualifier in the operation conditions of high, middle and low speeds. The test data of fuel injection quantity and injection pressure are analyzed to reveal the variation law of fuel injection quantity inconsistency and its main influencing factors. In addition, according to the fuel injection characteristics of EUP, corresponding injection pulse width correction coefficients are proposed. The results of verification test show that after the injection pulse widths are corrected, the inconsistency of fuel injection quantity greatly improves, with an over 50% improvement in some conditions, thus enhancing the operation stability of diesel engine to certain extent.

• 出版日期2015
• 单位北京理工大学