youbengfengao壓hedi壓，jigao壓zhusaiyoubengshikaobengzhongdetu輪軸，帶動zhusaizaizhusaitaozhongshangxiawang復運動，產shenggao壓yougong給噴youqi
，zhusaide圓zhumianshangjiagongyouxiecaohezhicaoxianghu連tong
，軸xiangzhicaozhitongzhusai頂
，youdezhusai沒youzhicao
，shizaizhusai頂bu鑽yiyoukongzhijie與xiecaoxiangtong，構chengbengqiang

，zhusaitaoshangbu鑽you兩個進youkou
，當zhusaixiajiangdao這兩個進youkongsai處zhusai頂mian時
，di壓youbian從這個進youkongwangbengqiangzhong進you，當zhusaixiangshang運動時，yi經進rubengqiangzhongdeyou會從兩個進youkongfanliuchuyibufen

，當zhudaishangshengdaozhusai頂mianba兩個進youkongfengsi時，wangbengqiangzhongchongyoucaigao結shu。

    此ci時時泵beng腔qiang成cheng了le封feng閉閉腔qiang，此ci後hou
，柱zhu塞sai還還繼繼續續上shang升sheng，腔qiang內內油you壓壓急ji劇劇升sheng高gao，當當高gao到dao足zu以yi克ke服fu出chu油you閥閥彈彈簧huang壓壓力li時時

，出chu油you閥閥被bei打da開開，高gao壓壓油you通tong過過高gao壓壓管guan供gong給給噴噴油you器qi。當當柱zhu塞sai上shang升sheng到dao柱zhu塞sai上shang的de斜xie槽cao與與與與進進油you孔kong連連通tong時時，泵beng腔qiang中zhong的de壓壓力li油you流liu回hui低di壓壓腔qiang，泵beng腔qiang中zhong的de壓壓力li迅xun速su下xia降jiang
，出chu油you閥閥在zai彈彈簧huang作zuo用yong下xia立li即ji關關閉閉
，噴噴油you泵beng立li即ji停ting止zhi供gong油you
，柱zhu塞sai上shang的de斜xie槽cao與與柱zhu塞sai套tao上shang的de油you孔kong連連通tong的de時時間間，也ye就jiu是shi噴噴油you泵beng停ting止zhi供gong油you的de時時間間，停ting止zhi供gong油you的de時時間間越yue早zao
，供gong油you量liang越yue大da，轉轉動動柱zhu塞sai就jiu可ke以yi改gai變變停ting止zhi供gong油you時時間間，當當柱zhu塞sai上shang的de直zhi槽cao與與柱zhu塞sai套tao上shang的de油you孔kong對對上shang時時，噴噴油you泵beng便bian不bu會會產產生sheng高gao壓壓油you，柴chai油you機機將將熄xi火huo停ting車車
，使shi用yong中zhong，操cao作zuo人ren員員通tong過過操cao作zuo機機構構

，可ke以yi改gai變變柱zhu塞sai的de角jiao度du，從從而er改gai變變油you量liang的de大da小xiao。