威格士vickers當(dāng)凸輪的凸起部分轉(zhuǎn)過去后，在彈簧力的作用下，柱塞向下運(yùn)動(dòng)，柱塞上部空間（稱為泵油室）產(chǎn)生真空度，當(dāng)柱塞上端面把柱塞套上的進(jìn)油孔打開后，充滿在油泵上體油道內(nèi)的柴油經(jīng)油孔進(jìn)入泵油室，柱塞運(yùn)動(dòng)到下止點(diǎn)，進(jìn)油結(jié)束。供油過程   

　　威格士vickers當(dāng)凸輪軸轉(zhuǎn)到凸輪的凸起部分頂起滾輪體時(shí)，柱塞彈簧被壓縮，柱塞向上運(yùn)動(dòng)，燃油受壓，一部分燃油經(jīng)油孔流回噴油泵上體油腔。當(dāng)柱塞頂面遮住套筒上進(jìn)油孔的上緣時(shí)，由于柱塞和套筒的配合間隙很小（0.0015-0.0025mm）使柱塞頂部的泵油室成為一個(gè)密封油腔，柱塞繼續(xù)上升，泵油室內(nèi)的油壓迅速升高，泵油壓力>出油閥彈簧力+高壓油管剩余壓力時(shí)，推開出油閥，高壓柴油經(jīng)出油閥進(jìn)入高壓油管，通過噴油器噴入燃燒室?；赜瓦^程   

　　威格士vickers柱塞向上供油，當(dāng)上行到柱塞上的斜槽（停供邊）與套筒上的回油孔相通時(shí)，泵油室低壓油路便與柱塞頭部的中孔和徑向孔及斜槽溝通，油壓驟然下降，出油閥在彈簧力的作用下迅速關(guān)閉，停止供油。此后柱塞還要上行，當(dāng)凸輪的凸起部分轉(zhuǎn)過去后，在彈簧的作用下，柱塞又下行。此時(shí)便開始了下一個(gè)循環(huán)。結(jié)論：通過上述討論，得出下列結(jié)論   

①  威格士vickers柱塞往復(fù)運(yùn)動(dòng)總行程L是不變的，由凸輪的升程決定。   

②  威格士vickers柱塞每循環(huán)的供油量大小取決于供油行程,供油行程不受凸輪軸控制是可變的。   

③  供油開始時(shí)刻不隨供油行程的變化而變化。   

④  轉(zhuǎn)動(dòng)柱塞可改變供油終了時(shí)刻，從而改變供油量。 

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威格士VICKERS  EATON-VICKERS伊頓威格士示例型號(hào)：  PFB柱塞泵：PFB5、PFB10、PFB20、PFB45，PFB5-FRY-22-S124；軸向柱塞泵：PVB5/6、PVB10/15、PVB20/29、PVB45、PVB90；..... 

VICKERS威格士PVH098柱塞泵型號(hào).

PVH098R01AJ30A25000000100100010A   PVH98C-RF-1S-10-C25-31

PVH098R01AJ30B25200000100100010A   PVH98C-RF-1S-10-C25V-31

PVH098R01AJ30B252000001001AA010A   PVH98C-RF-1S-11-C25V-31

PVH098R02AJ30A25000000100100010A   PVH98C-RF-2S-10-C25-31

PVH098R02AJ30B25200000100100010A   PVH98C-RF-2S-10-C25V-31

PVH098R02AJ30B252000001001AA010A   PVH98C-RF-2S-11-C25V-31

PVH098R01AJ30A25000000200100010A   PVH98C-RSF-1S-10-C25-31

PVH098R01AJ30B25200000200100010A   PVH98C-RSF-1S-10-C25V-31

PVH098R02AJ30A25000000200100010A   PVH98C-RSF-2S-10-C25-31

PVH098R02AJ30B25200000200100010A   PVH98C-RSF-2S-10-C25V-31

PVH098R01AJ30A250000001001AB010A   PVH98QIC-RF-1S-10-C25-31

PVH098R01AJ30B252000001001AB010A   PVH98QIC-RF-1S-10-C25V-31

PVH098R01AJ30A250000001001AE010A   PVH98QIC-RF-1S-11-C25-31

PVH098R02AJ30B252000001001AB010A   PVH98QIC-RF-2S-10-C25V-31

PVH098R02AJ30A250000001001AE010A   PVH98QIC-RF-2S-11-C25-31

PVH098R01AD30A250000001001AB010A   PVH98QIC-RM-1S-10-C25-31

PVH098R01AD30A250000001001AE010A   PVH98QIC-RM-1S-11-C25-31

PVH098R01AJ30A250000002001AB010A   PVH98QIC-RSF-1S-10-C25-31

PVH098R01AJ30B252000002001AB010A   PVH98QIC-RSF-1S-10-C25V-31

PVH098R01AJ30A250000002001AE010A   PVH98QIC-RSF-1S-11-C25-31

PVH098R02AJ30A250000002001AB010A   PVH98QIC-RSF-2S-10-C25-31

PVH098R02AJ30A250000002001AE010A   PVH98QIC-RSF-2S-11-C25-31

PVH098R01AD30A250000002001AB010A   PVH98QIC-RSM-1S-10-C25-31

PVH098R01AD30A250000002001AE010A   PVH98QIC-RSM-1S-11-C25-31

PVH098R01AD30B252000002001AE010A   PVH98QIC-RSM-1S-11-C25V-31

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