威格士柱塞泵柱塞往复运动总行程L是不变的，由凸轮的升程决定。柱塞每循环的供油量大小取决于供油行程,供油行程不受凸轮轴控制是可变的。供油开始时刻不随供油行程的变化而变化。转动柱塞可改变供油终了时刻，从而改变供油量。柱塞泵工作时，在喷油泵凸轮轴上的凸轮与柱塞弹簧的作用下，迫使柱塞作上、下往复运动，从而完成泵油任务，泵油过程可分为以下三个阶段。
进油过程
当凸轮的凸起部分转过去后，在弹簧力的作用下，柱塞向下运动，柱塞上部空间(称为泵油室)产生真空度，当柱塞上端面把柱塞套上的进油孔打开后，充满在油泵上体油道内的柴油经油孔进入泵油室，柱塞运动到下止点，进油结束。
供油过程
当凸轮轴转到凸轮的凸起部分顶起滚轮体时，柱塞弹簧被压缩，柱塞向上运动，燃油受压，一部分燃油经油孔流回喷油泵上体油腔。当柱塞顶面遮住套筒上进油孔的上缘时，由于柱塞和套筒的配合间隙很小(0.0015-0.0025mm)使柱塞顶部的泵油室成为一个密封油腔，柱塞继续上升，泵油室内的油压迅速升高，泵油压力>出油阀弹簧力+高压油管剩余压力时，推开出油阀，高压柴油经出油阀进入高压油管，通过喷油器喷入燃烧室。
回油过程
柱塞向上供油，当上行到柱塞上的斜槽(停供边)与套筒上的回油孔相通时，泵油室低压油路便与柱塞头部的中孔和径向孔及斜槽沟通，油压骤然下降，出油阀在弹簧力的作用下迅速关闭，停止供油。此后柱塞还要上行，当凸轮的凸起部分转过去后，在弹簧的作用下，柱塞又下行。此时便开始了下一个循环。
柱塞泵以一个柱塞为原理介绍，一个柱塞泵上有两个单向阀，并且方向相反，柱塞向一个方向运动时缸内出现负压，这时一个单向阀打开液体被吸入缸内，柱塞向另一个方向运动时，将液体压缩后另一个单向阀被打开，被吸入缸内的液体被排出。这种工作方式连续运动后就形成了连续供油 。
美国VICKERS威格士PVB20-RS-20-C-11油压泵美国VICKERS威格士PVB20-RS-20-C-11油压泵
威格士--PVH057系列：PVH057R01AB10B252000001001AA010A PVH57C-RM-1S-11-C25V-31
威格士--PVH057系列：PVH057R02AB10B252000001001AA010A PVH57C-RM-2S-11-C25V-31
PVH057R01AA10A25000000200100010A PVH57C-RSF-1S-10-C25-31
PVH057R51AA10A25000000200100010A PVH57C-RSF-1S-10-C25-31-027
PVH057R01AA10B25200000200100010A PVH57C-RSF-1S-10-C25V-31
PVH057R02AA10B252000002002AA010A PVH57C-RSF-2D-11-C25V-31
PVH057R02AA10A25000000200100010A PVH57C-RSF-2S-10-C25-31
PVH057R02AA10A250000002001AA010A PVH57C-RSF-2S-11-C25-31-CD
PVH057R02AA10B252000002001AA010A PVH57C-RSF-2S-11-C25V-31
PVH057R51AA10E252004001AE1AE010A PVH57QIC2-RAF-1S-11-C25VT4-31
PVH057R51AA10A250000001001AE010A PVH57QIC2-RF-1S-11-C25-31
PVH057R51AA10B252000001001AE010A PVH57QIC2-RF-1S-11-C25V-31
PVH057R51AA10AAF010A PVH57QIC2-RF-1S-11-CM7-31
PVH057R51AA10A250000002001AE010A PVH57QIC2-RSF-1S-11-C25-31
PVH057R01AA50E252004001AE1AE010A PVH57QIC3-RAF-1S-11-C25VT4-31
PVH057R01AA50B072000001AE1AE010A PVH57QIC3-RAF-1S-11-CM7V-31
PVH057R02AA50E252004001AE1AE010A PVH57QIC3-RAF-2S-11-C25VT4-31
PVH057R01AA50AAE010A PVH57QIC3-RSF-1S-11-CM7-31
PVH057L01AA10B252000001AE1AB010A PVH57QIC-LAF-1S-10-C25V-31
PVH057L01AA10A250000001AE1AE010A PVH57QIC-LAF-1S-11-C25-31
PVH057L02AA10H002000AW1AE1AB010A PVH57QIC-LAF-2S-10-IC-31-CD
PVH057L02AA10B252000001AE1AE010A PVH57QIC-LAF-2S-11-C25V-31-CD
PVH057L01AA10A250000001001AB010A PVH57QIC-LF-1S-10-C25-31
PVH057L01AA10B252000001001AB010A PVH57QIC-LF-1S-10-C25V-31
PVH057L01AA10E252004001001AE010A PVH57QIC-LF-1S-11-C25VT4-31
PVH057L02AA10A250000001001AB010A PVH57QIC-LF-2S-10-C25-31
PVH057L02AA10B252000001001AB010A PVH57QIC-LF-2S-10-C25V-31
PVH057L52AA10B252000001001AB010A PVH57QIC-LF-2S-10-C25V-31-027
PVH057L02AA10AAE010A PVH57QIC-LF-2S-11-CM7-31-CD
PVH057L52AA10H002000AW2001AB010A PVH57QIC-LSF-2S-10-IC-31-027
PVH057R01AA10A140000001AE1AB010A PVH57QIC-RAF-1S-10-C14-31
PVH057R01AA10B142000001AE1AB010A PVH57QIC-RAF-1S-10-C14V-31
PVH057R01AA10B162000001AE1AC010A PVH57QIC-RAF-1S-10-C16V-31-091
PVH057R01AA10A250000001AE1AB010A PVH57QIC-RAF-1S-10-C25-31
PVH057R01AA50A250000001AE1AB010A PVH57QIC-RAF-1S-10-C25-31-057
PVH057R01AA10B252000001AE1AB010A PVH57QIC-RAF-1S-10-C25V-31
PVH057R51AA10B252000001AE1AB010A PVH57QIC-RAF-1S-10-C25V-31-027
PVH057R01AA10A070000001AE1AC010A PVH57QIC-RAF-1S-10-CM7-31
PVH057R01AA10B072000001AE1AB010A PVH57QIC-RAF-1S-10-CM7V-31
PVH057R01AA10H002000AW1AE1AB010A PVH57QIC-RAF-1S-10-IC-31
PVH057R01AA10B142000001AE1BC010A PVH57QIC-RAF-1S-11-C14V-31-CD-115
PVH057R01AA10A250000001AE1AE010A PVH57QIC-RAF-1S-11-C25-31
PVH057R01AA10D250004001AE1AE010A PVH57QIC-RAF-1S-11-C25T4-31
PVH057R01AA10B252000001AE1AF010A PVH57QIC-RAF-1S-11-C25V-31
PVH057R01AA10E252004001AE1AE010A PVH57QIC-RAF-1S-11-C25VT4-31
PVH057R01AA10J002004AW1AE1AE010A PVH57QIC-RAF-1S-11-ICT4-31
PVH057R02AA10A140000001AE1AC010A PVH57QIC-RAF-2S-10-C14-31
PVH057R02AA10B162000001AE1AC010A PVH57QIC-RAF-2S-10-C16V-31-091
PVM131ER09GS02AAE00200000A0A
PVM131ER09GS02AAC23200000A0A
PVM131ER10GS02AAC28200000A0A
PVM131ER13GS02AAA28000000A0A
PVM131ER19HS02AAC28200000A0A
PVM131ER13GS02AAF0020000EA0A
PVM106ER11GS02AAF00200000A0A
PVM106ER09GS02AAA23000000A0A
PVM098ER10GS04AAB28110000A0A
PVM098ER19FS04AAA28000000A0A
PVM098ER09GS02AAA07000000A0A
PVM098ER09GS02AAE00200000A0A
PVM098ER09ES02AAC23110000A0A
PVM098ER10GS02AAB28110000A0A
PVM098ER09GS02AAC28200000A0A
PVM098ER10GS02AAE0020000EA0A
PVM098ER09GS02AAA28000000A0A
PVM098ER09GS02ASA28000000A0A
PVM098ER11GS02AAA28000000A0A
PVM098ER10GS02AAA2800000EA0A
PVM098ER09GS04AAA28000000A0A
PVM098ER09GS04AAC28200000A0A
PVM098ER09GS02AAC28110000A0A
PVM098ER11ES02AAC28200000A0A
PVM081ER09GS02AAC2320000000A
PVM081ER09GS02AAA23000000A0A
PVM081ER09ES02AAA23000000A0A
PVM074ER09GS02AAE0020000AA0A
PVM074ER09GS04AAC28200000A0A
PVM074ER09ES02AAC23200000A0A
PVM074ER09GS02AAC28110000A0A
PVM074ER19FS04AAA28000000A0A
PVM074ER09GS02AAA28000000A0A
PVM074ER09GS02AAA07000000A0A
PVM074ER19FS04AUF0020000000A
PVM074ER10ES02AAB28110000A0A
PVM074ER09GS02AAC28200000A0A
PVM063ER09ES02AAA21000000A0A
PVM063ER09EE02AAA21000000A0A
PVM063ER11GS02AAA23000000A0A
PVM063ER09EE01AAA07000000A0A
PVM057ER09ES02AAA28000000A0A
PVM057ER09GS02AAA07000000A0A
PVM057ER09GS02AAC28200000A0A
PVM057ER09GS02AAA0700000AA0A
PVM057ER09GS02AAB2811000AA0A
PVM057ER09EE02AAB10110000A0A
PVM057ER09GS02AAC28110000A0A
PVM057ER09GS02AAC2820000CA0A
PVM057ER09GS02AAA28000000A0A
PVM050EL07CS01AAB2320000AA0A
PVM050ER05CS02AAC21110000A0A
PVM045ER06CS02AAA28000000A0A
PVM045ER05CS02AAA07000000A0A
PVM045ER05CS02AAC28110000A0A
PVM045ER05CS0200C28110000A0A
PVM045ER05CE01AAA28000000A0A
PVM045ER05CS05AAB28110000A0A
PVM045ER05CE04AAA28000000A0A
PVM045ER05CS02AAC28200000A0A
PVM045ER07DE05AAA23000000A0A
PVM045ER17DS05AAA0700000AA0A
PVM045ER17DS04AAA28000000A0A
PVM045ER07CS02AAC28110000A0A
PVM045ER05CE01AAB28110000A0A
PVM045ER06CS05AAC28200000A0A
PVM045ER06CS02AAC2320000AA0A
PVM045ER05CS02AAA28000000A0A
PVM045ER05CS02AAB21110000A0A
PVM045ER05CS01AAA28000000A0A
PVM045ER06CS02AAB28110000A0A
PVM045ER07CS02AAC28200000A0A
PVM045ER17DS05AAB2311000CA0A
PVM045ER06CS02AAC28110000A0A
PVM045ER06CS02AAB21110000A0A
PVM045ER05CS01AAA2800000AA0A
PVM045ER05CS0200C2320000CA0A
PVM045ER05CE05AAA07000000A0A
PVM045ER06CS02AAC2811000DA0A
PVM045ER08CS02AAC28110000A0A
PVM045ER05CE02AAA07000000A0A
PVM020ER05CS01AAB23110000A0A
PVM020ER02AS02AAC23240000A0A
PVM020ER07CS02AAC2320000AA0A
PVM020ER02AE01AAA23000000A0A
PVM018ER02AE01AAA28000000A0A
PVM018ER01AS05AAB28110000A0A
PVM018ER01AE01AAB28110000A0A
PVM018ER01AS02AAA28000000A0A
PVM018ER02AS01AAC28110000A0A
PVM018ER01AS02AAC23110000A0A
PVM018ER07CS01AAB23200000A0A
PVM018ER01AS01AAB23110000A0A
PVM018ER03AE01AAB28200000A0A
VICKERS威格士柱塞泵常用型号：
PVQ10 A2R SE1S 10C21
PVQ10 A2R SE1S 10 C21
PVQ10-A2R-SS1S-C21-D-11
PVQ10-A2R-SE1S-20-C21-12
PVQ10-A2P-SE1S-10-CS-20
PVQ13-A2R-SE1S-10-C14-D-11
PVQ13-A2L-SS1S-20-C14-D-12
PVQ13-A2R-SE1S-10-CM14D-12
PVQ13-A2R-SE1S-20-CM7D-12
PVQ20-B2R-SE1S-21-C21-12
PVQ20 B2R SS1S 20 C21D 11
PVQ20-B2R-SS1S-21-C21D-12
PVQ20-B2R-SS1S-21-CM7-12-073
PVQ20-B2R-SE1S-21-C21-12?
PVQ20-B2R-SS1S-21-C21-D-12
PVQ32-B2R-SE1S-21-C34D-1202-341686
PVQ32-B2R-SS1S-21-C1-4-1
PVQ32-B2R-SS1S-21-CM7-12
PVQ32-B2R-SS1S-21-C14D-12
PVQ32-B2R-SS1S-21-CM7D-12
PVQ40-B2R-SE1F-20-C21D-12
PVQ40-B2R-SS2S-10-C21-D11
PVQ40 B2L SS1S 10 C7 10 S15
PVQ40 B2R-SELS-10-C21D-11
PVQ40 B2R SELS 10 C21D 11 S4
PVQ40AR0SAB10A21000000100100CD0AD
PVQ40AR01AB10G2100000100100CD0A
PVQ40AR02AA10A2100000200100CD0A
VICKERS威格士柱塞泵PVQ10系列：
PVQ10-A2L-SE1S-20-C14D-12、
PVQ10-A2L-SE1S-20-C21-12、
PVQ10-A2L-SE1S-20-C21D-12、
PVQ10-A2L-SE1S-20-CG-30、
PVQ10-A2L-SE1S-20-CM7-12、
PVQ10-A2L-SS1S-20-C21-12、
PVQ10-A2L-SS1S-20-CM7-12、
PVQ10-A2R-SE1S-10-C21-11、
PVQ10-A2R-SE1S-20-C21-12、
PVQ10-A2R-SE1S-20-C21-12-S2、
PVQ10-A2R-SE1S-20-C21D-12、
PVQ10-A2R-SE1S-20-C21D-12-S2、
PVQ10-A2R-SE1S-20-CG-30、
PVQ10-A2R-SE1S-20-CG-30-S2、
PVQ10-A2R-SE1S-20-CGD-30、
PVQ10-A2R-SE1S-20-CM7-12、
PVQ10-A2R-SE1S-20-CM7D-12、
PVQ10-A2R-SS1S-20-C21-12、
PVQ10-A2R-SS1S-20-C21D-12、
PVQ10-A2R-SS1S-20-CG-30-S2、
PVQ10-A2R-SS1S-20-CM7-12、
PVQ10-A2R-SS3S-20-C21D-12..........。
VICKERS威格士柱塞泵PVQ13系列：
PVQ13-A2L-SE1F-20-C14-12、
PVQ13-A2L-SE1S-20-C14-12、
PVQ13-A2L-SE1S-20-CM7-12、
PVQ13-A2L-SE1S-20-CM7D-12、
PVQ13-A2L-SS1S-20-CM7-12、
PVQ13-A2R-SE1F-20-CM5-12、
PVQ13-A2R-SE1F-20-CM6-12、
PVQ13-A2R-SE1F-20-CM7-12、
PVQ13-A2R-SE1S-10-C14-11、
PVQ13-A2R-SE1S-20-C14-12、
PVQ13-A2R-SE1S-20-C14-12-S2、
PVQ13-A2R-SE1S-20-C14D-12、
PVQ13-A2R-SE1S-20-CG-30、
PVQ13-A2R-SE1S-20-CG-30-S2、
PVQ13-A2R-SE1S-20-CGD-30、
PVQ13-A2R-SE1S-20-CM4-12-S2、
PVQ13-A2R-SE1S-20-CM7-12、
PVQ13-A2R-SE1S-20-CM7-12-S2、
PVQ13-A2R-SS1F-20-C14-12、
VQ13-A2R-SS1F-20-CG-30-S2、
PVQ13-A2R-SS1F-20-CM7-12、
PVQ13-A2R-SS1S-20-C14-11、
PVQ13-A2R-SS1S-20-C14-12、3520V25A12 1AA22R
3520V25A12 1CC22R
3520V25A12-1DD22R
3520V30A2 1CC22R
3520V30A5 1DB22R
3520V30A5 1DC22R
3525V35A21-1BA22R
3525V38A12-1BB-22R
3525V38A14 11AA22R
3525V38A17 1AA22R
3525V38A17 1BB22R
3525V38A17 1CC22R
3525V38A17 1BA22R
3525V38A17 1DA22R
3525V38A21 1AA22R
3525V38A21 1BB22R
3525V38A21 1CC22R
3525V38A21-1AB22R
3525V38A21 86BB22R
3525V38A21 86CC22R
3525VQ30A21 1DD20
4520V42A5 1CC22R
4520V42A11 1AB22R
4520V42A11 1AC22R
4520V42A12 1CC22R
4520V42A12 1CC22R
4520V42A12 86DD22R
4520V50A5 1CC22R
4520V50A8 1CC22R
4520V50A11 1AA22R
4520V50A11 1CC22R
4520V50A12 1AA22R
4520V50A14-1AA22L
4520V60A5 1CC22R
4520V60A8 1AA22R
4520V60A8 1CC22R
4520V60A11 1AD22R
4520V60A12 1AA22R
4520V60A12 1CC22R
4520V60A14 1CC22R
4525V42A14-1AD22R
4525V42A17 1AA22R
4525V42A17 1CC22R
4525V42A17 1DD22R
4525V42A17 1DA22R
4525V42A21 1AA22R
4525V42A21 1BB22R
4525V42A21 1CC22R
4525V42A21 1BA22R
4525V42A21 1BD22R
4525V42A21 1DA22R
4525V42A21 86AA22R
4525V42A21-86DD22R
4520V45A5 1BB22R
4525V50A12 1DD22R
4525V50A14 1AA22R
4525V50A14 1DD22R
4525V50A17 1AA22R
4525V50A17 1CC22R
4525V50A17 1DD22R
4525V50A17 1DD22R
4525V50A21 1AA22R
4525V50A21 1CC22R
4525V50A21 1DD22R
4525V50A21 1BB22L
4525V50A21 1AB22R
4525V 50A21 1AD22R
4525V50A21 1DA22R
4525V50A21-1DC22R
4525V50A21 86AA22R
4525V50A21 86BB22R
4525V60A12 1DD22R
2520V12A2 1BB22R
2520V12A2-1CA22R
2520V12A5 1DD22R
2520V12A5-1AD22R
2520V12A8 1AA22R
2520V12A8 1CC22R
2520V12A8 1DD22R
2520V12A11 1AA22R
2520V12A11 1DD22R
2520V14A5 1BB22R
2520V14A5 1CC22R
2520V14A5 1DD22R
2520V14A8-1BB22R
2520V14A8 1CC22R
2520V14A8 1DD22R
2520V14A11 1AA22R
2520V14A11 1BB22R
2520V14A11 1CC22R
2520V14A11 1DD22R
2520V14A12 1AA22R
3520V30A8 1AA22R
3520V30A8 1CC22R
3520V30A8-1DD22R
3520V30A8 1CB22R
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