CN1534185A - 燃油喷射泵 - Google Patents

燃油喷射泵 Download PDF

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CN1534185A
CN1534185A CNA2004100323042A CN200410032304A CN1534185A CN 1534185 A CN1534185 A CN 1534185A CN A2004100323042 A CNA2004100323042 A CN A2004100323042A CN 200410032304 A CN200410032304 A CN 200410032304A CN 1534185 A CN1534185 A CN 1534185A
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pump
fuel
dise
fuel oil
rib
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CN1312397C (zh
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|田秀典
梶田秀典
二郎
大泉健二郎
一
金野洋一
治
菊地贤治
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Denso Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/16—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps characterised by having multi-stage compression of fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/005—Arrangements of fuel feed-pumps with respect to fuel injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • F04B23/103—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type being a radial piston pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/005—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle
    • F04C11/006—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle having complementary function
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F04C2230/602—Gap; Clearance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/805—Fastening means, e.g. bolts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2250/00—Geometry
    • F04C2250/10—Geometry of the inlet or outlet

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Rotary Pumps (AREA)

Abstract

在供给泵的泵盘(26)中，在驱动轴插入穿过的轴孔周围设置入口(26b)和出口(26c)，并且设置肋骨(26f)，其在圆周方向分别将入口(26b)和出口(26c)隔开，并且连接每个入口(26b)和出口(26c)相对的侧面(内周边和外周边)。也就是说，入口(26b)和出口(26c)在圆周方向上被每一根肋骨(26f)分为两部分。因此，当供给泵被螺钉固定在泵壳侧面时，即使不增加泵盘(26)的厚度，也可以防止泵盘中心变形。

Description

燃油喷射泵
技术领域
本发明涉及一种安装在用于例如柴油机上的燃油喷射泵上的供给泵。
背景技术
下面将举例介绍现有技术的燃油喷射泵。
燃油喷射泵装配有供给泵，用于从燃料箱中汲取燃料，并将燃料供给到喷射泵主体。
如图4所示，供给泵包括：一个在驱动轴100带动下旋转的泵芯110，一个安装在泵芯110轴向一端的泵盘120，以及一个遮盖泵芯110的轴向另一端部和径向外围表面的泵盖130，泵盖130与泵盘120以液封方式接合在一起，并通过螺栓与喷射泵主体的泵壳140。
泵芯110是一个摆线齿轮泵，其中，带有外齿的内齿轮112被安置在具有内齿的外齿轮111内侧。
如图5所示，在泵盘120的中心设置有轴孔121，驱动轴100插入并穿过轴孔121，并且在轴孔121周围形成形状为弧形的入口122和出口123。而且，在泵盘120的外围形成螺栓孔124和定位孔125。
泵盖130与泵盘120具有相同的外形。泵盖上的螺栓孔与定位孔的形成方式与泵盘120相同。
通过将螺栓(未示出)插入泵盘120和泵盖130的每一个螺栓孔124中，并将螺栓拧入泵壳140侧面的螺纹孔中(未示出)，从而将上述供给泵固定在泵壳140上。这样，如图4所示，泵盘120的中心有时会朝向泵芯110发生变形。结果，就可能导致以下缺点：
(1)泵盘120和泵芯110之间的推压空隙减少，从而发生卡死。
(2)在泵盘120的变形部位有燃料泄漏，导致低速排出特性(low-speed discharging property)变差。
因为在轴孔121的周围围绕其形成有较大的(长的)入口122和出口123，所以泵盘120的刚度变小，使泵盘120中心发生变形。因此，可以考虑增加泵盘120的厚度以增强其硬度。然而，在这种情况下，将导致诸如材料成本费用的增加，供给泵尺寸的增大以及冲压过程中可操作性的降低等缺点。因此，不希望采用增加泵盘120厚度的办法。
发明内容
鉴于以上情况，本发明的目的是提供一种带供给泵的燃油喷射泵，其能够在不增加泵盘厚度的情况下防止泵盘的变形。
根据本发明的第一方面，提供一种带供给泵的燃油喷射泵，所述供给泵安装在燃油喷射泵主体的泵壳侧表面，可以汲取燃料并将所汲取的燃料供给到所述燃油喷射泵主体。其中，所述供给泵包括：一个由驱动轴带动旋转的摆线齿轮泵芯；一个被安置在所述泵芯轴向一端的泵盘，在所述泵盘中心设置一轴孔，所述驱动轴插入并穿过所述轴孔，并且在所述轴孔周围设置基本成弧形的燃料入口和出口；一个泵盖，其在所述泵芯的轴向遮盖所述泵芯的另一端，并在所述泵芯的径向遮盖所述泵芯的外周边，所述泵盖与所述泵盘以液封方式接合，并且，所述泵盖与所述泵盘一起被固定在所述外壳的侧表面上，其中，所述泵盘设置有肋骨，所述肋骨在圆周方向上将所述入口和所述出口中的至少一个隔开，并且将所述口的相对两侧连接起来。
根据上述结构，由于在泵盘上附加了肋骨，从而提高了泵盘的刚度。因此，在不增加泵盘厚度的情况下，可以避免泵盘中心变形。可以只为出、入口中的其中一个设置肋骨。不过，很显然，如果为出、入口都设置肋骨，则可以进一步提高刚度。
根据本发明的第二个方面，提供一种燃油喷射泵，其中，所述肋骨被设置在所述至少一个口沿圆周方向的基本中间的位置处。
所述入口和出口在所述轴孔的圆周方向延伸。因此，肋骨被设置在所述口沿圆周方向的中间位置，  从而可以有效提高泵盘刚度。
根据该发明的第三个方面，提供一种燃油喷射泵，其中，所述泵盖通过螺钉固定在所述外壳侧表面。
通过下面结合附图对本发明优选实施例的阐述，本发明更容易理解。
附图说明
图1是泵盘的平面图；
图2是供给泵的剖面图；
图3是燃油喷射泵的剖面图；
图4是现有供给泵的剖面图；和
图5是现有泵盘的平面图。
具体实施方式
下面结合附图具体介绍该发明具体实施方式。
图1是供给泵泵盘的平面图。图2是供给泵的剖面图。图3是燃油喷射泵的剖面图。
本实施例的燃油喷射泵1用于例如，柴油机的燃料积蓄喷射系统，并具有喷射泵主体2和供给泵3(见图2)，其中喷射泵主体2对燃料加压并输送燃料，而供给泵3(见图2)从燃料箱中汲取燃料并将燃料供给到喷射泵主体，如图3所示。
a)喷射泵主体2包括一个泵壳4、多个分别限制气缸5的汽缸盖6，分别插入到汽缸5中的多个活塞7，一个通过凸轮8驱动活塞7的驱动轴9等。
泵壳4内具有燃料供给通道10和回流通道11，燃料供给通道10连接供给泵3的出口26c(如图1)，回流通道11从燃料供给通道10分叉，并将剩余的燃料送回燃料箱(未示出)。泵壳4还设置有燃料入口12，电磁量控制阀13和压力控制阀14等，下面将对这些部件进行描述。
燃料入口12与从燃料箱内汲取燃料的燃料通道(未示出)相连，将汲取的燃料过滤，然后将过滤后的燃料引入到供给泵3中。
在燃料供给通道10中安装有电磁量控制阀13，用于根据发动机运转状态，控制从供给泵3输送的燃料量。
在回流通道11中安装有压力控制阀14，当供给泵3内燃料的压力等于或超出预定压力时，压力控制阀14开启。
汽缸盖6被安装在泵壳4上，位于驱动轴9径向的两个相反的位置上。在每一个汽缸盖6内，安装有止回阀16和管接头17，其中，借助止回阀16，在汽缸5内的活塞7和止回阀之间形成一个压缩室。在每一个汽缸盖6内还形成有排出通道18，其排出在压缩室15内被压缩的燃料。
止回阀16能够打开或关闭位于压缩室15与连接燃料供给通道10的连接通道10a之间的空间。在活塞7向下移动的过程中(燃料汲取过程)止回阀16开启，从而将输送给供给泵3的燃料引入到压缩室15中。在活塞7向上移动的过程(燃料输送过程)中止回阀16关闭，以阻止吸入压缩室15的燃料返回到供给泵5中。
在管接头17内部形成一个与排出通道18相连接的燃料通道17a。
排出通道18包括一个内径较小的入口18a和一个内径较大的出口18b。入口18a与汽缸5内部连通，而出口18b与管接头17的燃料通道17a连通。在入口18a和出口18b之间安置一个球阀19，其受弹簧20推压，隔断入口18a和出口18b的连接。活塞7向上移动过程中，球阀19开启，使入口18a和出口18b相连通。
在与压缩室相反的一侧，活塞7有一个活塞头7a。该活塞头7a受弹簧21推压，挤靠导板22。通过装配在导板22和凸轮8之间的轴衬23，凸轮8的旋转传递给导板22，然后导板22绕凸轮8转动。
通过轴承24，泵壳4可旋转支承驱动轴9，而驱动轴9由发动机驱动而转动。
凸轮8有一个圆形部分。凸轮8的中心偏离驱动轴9的中心，并且凸轮8与驱动轴9形成为一体。
2)供给泵3由泵芯25，泵盘26和泵盖27组成，并被固定到泵壳4的一个侧面(见图2)。
如图3所示，泵芯25是已知的摆线齿轮泵，其中，具有外齿的内齿轮25b被安置在具有内齿的外齿轮25a的内部。内齿轮25b由栓销与驱动轴9相连接，并与驱动轴9共同转动。
如图2所示，泵盘26被安置在泵芯25和泵壳4之间。如图1所示，在泵盘26的中心形成一轴孔26a，驱动轴9插入并穿过轴孔26a。在轴孔26a周围形成入口26b和出口26c。在泵盘26外围部分形成多个螺栓孔26d和定位孔26e。
在泵盘26上设置有肋骨26f，肋骨26f分别将入口26b和出口26c沿圆周方向隔开，并且连接入口26b和出口26c相对的侧面(内径一侧和外径一侧)。也就是说，入口26b和出口26c在圆周方向上分别被每一根肋骨26f分为两部分。肋骨26f分别被设置在入口26b和出口26c沿圆周方向的大致中间位置。
泵盖27遮盖泵芯25轴向的一端，这一端与靠近泵盘26的一端相对，而且，泵盖27遮盖泵芯2 5的径向外周边，并且与泵盘以液封方式接合在一起。泵盖27与泵盘26具有相同的外形。在泵盖上以与泵盘26相同的方式形成多个螺栓孔和定位孔。
通过将螺栓插入泵盘26和泵盖27上的每个螺栓孔26d里，并将螺栓拧入泵壳4侧面上的螺纹孔(未示出))中，从而将上述供给泵3固定在泵壳4上。
下面描述燃油喷射泵的操作过程。
驱动轴9的旋转带动凸轮8转动。凸轮8的转动通过导板22传递到活塞7上，然后活塞7在汽缸5中往复运动。当位于上死点的活塞7在气缸5中向下移动时，电磁量控制阀13调控从供给泵3排出的燃料量，然后调控后的燃料从燃料供给通道10，经过连通通道10a流向压缩室15(此时，止回阀16开启)。
然后，当移动到汽缸5下死点的活塞7向上朝上死点移动过程中，止回阀16闭合，从而使压缩室15内的燃料压力增加。当压缩室15内的燃料压力超过弹簧推压球阀19的推压力时，球阀19上升，从而使排出通道18的入口18a和出口18b相连通。结果，在压缩室15内增压后的燃料，经过排出通道18传输到管接头17的燃料通道17a，然后，经过与管接头17相连接的燃料管道，供应给公共管线。
下面将描述本发明的效果。
在燃油喷射泵1上应用的供给泵3中，多个肋骨26f分别被设置在入口26b和出口26c沿圆周方向的大致中间位置处。因此，如图1所示，入口26b和出口26c在它们的圆周方向上被分割为两部分。与图5所示的传统泵盘120相比，由于肋骨26f连接每个入口26b和出口26c的内、外周边，所以泵盘26的刚度提高。
因此，当泵盘3被螺栓固定在泵壳4的侧面时，即使不增加泵盘26的厚度，也可以防止泵盘中心的变形。这样，因为能够确保泵盘26和泵芯25之间的预定推压空隙，因此，可以防止供给泵3卡死。另外，因为避免了泵盘26的变形，可以减少燃料的泄漏，并保持供给泵3的低速排出特性。
在本发明中，多个肋骨26f分别被设置在入口26b和出口26c沿圆周方向的大致中间位置处。然而，本发明并不局限于此。例如，入口26b和出口26c其中至少一个可以被安置在两个位置处的肋骨26f分割为三部分。在这种情况下，肋骨26f的数量由隔开入口26b和出口26c增加的工时和泵盘26刚度的提高程度决定。
尽管结合具体实施方式对本发明进行了描述。但很显然，在不脱离本发明的基本精神及保护范围的情况下，本领域普通技术人员可能对此作出多种改进。

Claims (3)

1.一种带供给泵的燃油喷射泵，所述供给泵安装在所述燃油喷射泵主体的外壳侧表面，用于汲取燃料并将燃料输送给所述燃油喷射泵主体，其中，所述供给泵包括：
一个由驱动轴带动旋转的摆线齿轮泵芯；
一个被安置在所述泵芯轴向一端的泵盘，在所述泵盘中心设置一轴孔，所述驱动轴插入并穿过所述轴孔，并且在所述轴孔周围设置基本成弧形的燃料入口和出口；
一个泵盖，其在所述泵芯的轴向遮盖所述泵芯的另一端，并在所述泵芯的径向遮盖所述泵芯的外周边，所述泵盖与所述泵盘以液封方式接合，并且，所述泵盖与所述泵盘一起被固定在所述外壳的侧表面上，其中，
所述泵盘设置有肋骨，所述肋骨在圆周方向上将所述入口和所述出口中的至少一个隔开，并且将所述口的相对两侧连接起来。
2.如权利要求1所述的燃油喷射泵，其中，所述肋骨被设置在所述至少一个口沿圆周方向的基本中间的位置处。
3.如权利要求1所述的燃油喷射泵，其中，所述泵盖通过螺钉固定在所述外壳侧表面。
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