CAJ | 학술논문

进行单缸单体泵的油泵台架试验,获得了不同转速下油泵入口端的低压供油压力和高压油管内的高压压力.分析了循环变动时低压和高压对应的压力曲线特点.研究表明:单体泵控制阀打开过程中,供油柱塞下行吸油使得低压油路内压力降低,同时高压油腔内燃油回流到低压油路时形成压力波,这两个因素导致高转速时低压油路的供油压力在部分循环内出现负压,产生单体泵循环变动.试验证明,提高输油压力和增大低压油路的流通面积能够降低单体泵循环变动.
진행단항단체빙적유빙태가시험,획득료불동전속하유빙입구단적저압공유압력화고압유관내적고압압력.분석료순배변동시저압화고압대응적압력곡선특점.연구표명:단체빙공제벌타개과정중,공유주새하행흡유사득저압유로내압력강저,동시고압유강내연유회류도저압유로시형성압력파,저량개인소도치고전속시저압유로적공유압력재부분순배내출현부압,산생단체빙순배변동.시험증명,제고수유압력화증대저압유로적류통면적능구강저단체빙순배변동.
By experimental studies for the single EUP on test bench, the low fuel supply pressures near the EUP and the high pressures in high pressure fuel pipe at different cam speeds were acquired. The high and low pressure curves of the EUP's cyclic variation circles were analyzed. Test results showed that when the cam shaft speed is very high, the supply pressure instantaneous decreased as the plunger move downward, and the pressure wave which results from the backward flow of high pressure fuel appears in low fuel supply loop. The above two factors cause the negative pressure at low fuel supply loop, and leads to the cyclic variation. Increase in fuel supply pressure and the fuel supply pipe lines flow area is advantageous in reduction the cyclic variation of EUP.