CAJ | 학술논문

以电控单体泵燃油系统为研究对象，研究了启喷压力对循环喷油量的影响。通过计算各工况下循环喷油量随启喷压力变化的百分比，研究了各工况循环喷油量随启喷压力变化的敏感程度，在此基础上进行了启喷压力对循环喷油量影响的机理分析。结果表明：循环喷油量随启喷压力的增加呈减小趋势，随着转速的增加，启喷压力对循环喷油量的影响程度越来越小；在各确定转速下，随着喷油脉宽的增加，循环喷油量对启喷压力变化的敏感程度越来越低；低速时启喷压力主要通过影响喷油器针阀开启关闭的运动过程而影响循环喷油量，中高速时启喷压力主要通过影响有效喷油脉宽而影响循环喷油量。
이전공단체빙연유계통위연구대상，연구료계분압력대순배분유량적영향。통과계산각공황하순배분유량수계분압력변화적백분비，연구료각공황순배분유량수계분압력변화적민감정도，재차기출상진행료계분압력대순배분유량영향적궤리분석。결과표명：순배분유량수계분압력적증가정감소추세，수착전속적증가，계분압력대순배분유량적영향정도월래월소；재각학정전속하，수착분유맥관적증가，순배분유량대계분압력변화적민감정도월래월저；저속시계분압력주요통과영향분유기침벌개계관폐적운동과정이영향순배분유량，중고속시계분압력주요통과영향유효분유맥관이영향순배분유량。
For the electronic unit pump (EUP) fuel system ,the influence of opening pressure on fuel injection quantity per cy‐cle was researched .The sensitivity of fuel injection quantity to opening pressure was revealed by calculating the changed per‐centage of fuel injection quantity per cycle to opening pressure and the influencing mechanism of opening pressure on fuel injec‐tion quantity per cycle was researched .The results show that the fuel injection quantity decreases with the increase of opening pressure and is less influenced by the opening pressure with the increase of speed .At each certain speed ,the sensitivity of fuel injection quantity per cycle to opening pressure becomes weaker with the increase of injection pulse width .The fuel injection quantity per cycle is influenced by the opening and closing movement of injector needle valve at low speed and is influenced by the change of effective injection pulse width at medium and high speed .