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公开(公告)号：JP2009209886A
公开(公告)日：2009-09-17
申请号：JP2008056358
申请日：2008-03-06
Applicant: Denso Corp , 株式会社デンソー
Inventor： KOBAYASHI ATSUSHIGE
Abstract: PROBLEM TO BE SOLVED: To make both compatible in the discharge performance of foreign matter and sealability, while restraining deterioration in the sealability. SOLUTION: This pump has a disk-like impeller 12, having a ring part 121 on the outer peripheral side of blade grooves 120 arranged in large number in the rotating direction, and forms a flow passage groove 100, which extends up to the tail end part, from a starting end part in the rotational direction of the impeller 12 in an area opposed to the blade grooves 120, on a cover 10. Expansion grooves 102 and 112, arranged on the outer peripheral side of the starting end part of the flow passage groove 100, are set opposed to an end surface of the ring part 121 and are positioned in a projection surface of the impeller 12, as viewed in the axial direction of the impeller 12. The foreign matter flowing in a seal surface is dropped in the expansion groove 102, when moving up to the expansion groove 102, in response to rotation of the impeller 12; and the foreign matter dropped in the expansion groove 102 is discharged from a discharge passage via the flow passage groove 100. Since the expansion groove 102 is arranged in a flow passage starting end part, being the low-pressure side and does not further extend up to the outside more than the sealing surface, reduction in the sealability can be restrained. COPYRIGHT: (C)2009,JPO&INPIT
Abstract translation: 要解决的问题：为了兼顾异物的排出性能和密封性，同时抑制密封性的劣化。 解决方案：该泵具有圆盘状的叶轮12，其具有沿旋转方向大量布置的叶片槽120的外周侧上的环形部分121，并且形成流路槽100，其延伸至 在叶片12的与叶片槽120相对的区域中从叶轮12的旋转方向的起始端部的尾端部延伸到盖10上。布置在起始端部的外周侧的膨胀槽102和112 流路槽100的一侧与环部121的端面相对设置，并且位于叶轮12的轴向方向的叶片12的突出面上。在密封面内流动的异物 响应于叶轮12的旋转而向上延伸到膨胀槽102时，在膨胀槽102中落下; 并且落在膨胀槽102中的异物经由流路槽100从排出通道排出。由于膨胀槽102配置在流路开始端部，作为低压侧而不进一步向上延伸 在外部比密封面更多，可以抑制密封性的降低。 版权所有（C）2009，JPO＆INPIT
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公开(公告)号：JP2001107818A
公开(公告)日：2001-04-17
申请号：JP26973299
申请日：1999-09-24
Applicant: DENSO CORP
Inventor： KOBAYASHI ATSUSHIGE , ITO MOTOYA
Abstract: PROBLEM TO BE SOLVED: To effectively reduce the generation of noise during operation of a pump and to satisfy both a demand for reduction of the generation of noise and a demand for saving of energy. SOLUTION: A pump chamber 13 and a pressure accumulating chamber 14 are coaxially formed in a body housing 11. By driving the plunger 15 of the pump chamber 13 in a left direction (a fuel suction direction) by a motor 19, fuel is sucked in the pump chamber 13. By driving rightward the plunger 15 for a pump through a coil spring 16 for discharge, fuel in the pump chamber 13 is discharged in the pressure accumulating chamber 14. By energizing the plunger 17 of the pressure accumulation chamber 14 in a right direction (a fuel pressurizing direction) through a spring 18 for pressure accumulation, fuel in the pressure accumulating chamber 14 is discharged in a fuel pressure regulating valve 37 as the fuel is pressurized. Fuel discharged in a fuel pressure regulating valve 37 is regulated to a specified fuel pressure and discharged to a fuel injection valve through a fuel discharge pipe 38.
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公开(公告)号：JPH10213089A
公开(公告)日：1998-08-11
申请号：JP250097
申请日：1997-01-10
Applicant: DENSO CORP
Inventor： MURAMATSU TOSHIHIKO , ITO MOTOYA , KOBAYASHI ATSUSHIGE
Abstract: PROBLEM TO BE SOLVED: To lengthen a pump flow passage which can be utilized for boosting and reduce pressure loss by reducing a direction changing angle when fuel flows from the pump flow passage to the discharge port, in a fuel pump using a reproduced pump. SOLUTION: In this pump, a discharge port 36 being communicated with the termination part of a pump flow passage is provided on the radially external side of the pump flow passage and the pump flow passage is extended to a radial seal part 40. By forming the discharge port 36 by being inclined in the revolving direction of an impeller, the inside surface of the discharge port 36 that fuel with a speed line segment of the same direction as the revolving direction of the impeller flows in the discharge port 36 collides is defined as a slant face 36a and pressure loss of fuel at the time of the collision is reduced. And because a guide groove to the discharge port 36 is formed at the termination part, fuel can be smoothly flowed within the blade groove of the impeller.
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公开(公告)号：JP2010249055A
公开(公告)日：2010-11-04
申请号：JP2009100233
申请日：2009-04-16
Applicant: Denso Corp , 株式会社デンソー
Inventor： KOBAYASHI ATSUSHIGE , WAKAMATSU YOSHIHISA
CPC classification number: F02M37/08 , F04D5/002 , F04D29/708
Abstract: PROBLEM TO BE SOLVED: To provide a fuel pump improving foreign-matter-discharging-performance without losing sealability.
SOLUTION: This fuel pump 10 includes an impeller 40 having blades 41 and an annular ring 44 at an outermost periphery thereof, and a cover 12 having an arcuate pump flow passage 27 formed along the blades 41. An enlarged space 31 is formed on the cover side slide surface 22 of the cover 12, having the wider gap than a slide gap 23 between the slide surface 22 and the axial end surface 45 of the ring 44 and communicated with the pump flow passage 27. The enlarged space 31 is formed in a range from a portion on the radially outer side of the end 37 of a suction port 36 to a portion of the pump flow passage 27 at the radially outer side of a location in which the fuel pressure in the pump flow passage 27 is equal to or less than the fuel pressure in the gap 26 between the ring portion 44 and a storage portion 20.
COPYRIGHT: (C)2011,JPO&INPITAbstract translation: 要解决的问题：提供一种改善异物排放性能而不损失密封性的燃料泵。 解决方案：该燃料泵10包括具有叶片41和位于其最外周边的环形环44的叶轮40和具有沿着叶片41形成的弓形泵流路27的盖12.形成有扩大空间31 在盖12的盖侧滑动表面22上，具有比滑动表面22和环44的轴向端面45之间的滑动间隙23更宽的间隙，并与泵流路27连通。扩大空间31 形成在从吸入口36的端部37的径向外侧的一部分到泵流路27的一部分的范围内，在泵流路27的燃料压力为位置的径向外侧 等于或小于环形部分44和存储部分20之间的间隙26中的燃料压力。版权所有（C）2011，JPO＆INPIT
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公开(公告)号：JP2003155992A
公开(公告)日：2003-05-30
申请号：JP2001354565
申请日：2001-11-20
Applicant: DENSO CORP
Inventor： KOBAYASHI ATSUSHIGE
Abstract: PROBLEM TO BE SOLVED: To provide a fuel pump having high sealing property and high pump efficiency, and facilitating assembly. SOLUTION: A pump channel 42 forming a pump flow passage 11 is formed in a casing main body 40, and a storage part 43 storing a ring member is formed on an outer peripheral side of the pump channel 42. A cross sectional area for reducing disturbance in the flow of fuel in the pump flow passage 11 is formed in a fixed section E in the storage part 43 to prevent the stagnation. The ring member is merely provided in the storage part 43 and can be assembled easily. Moreover, a section in which the pump flow passage 11 is not formed is a seal part 44a. The seal part 44a is formed integrally with the casing main body 40 and a clearance between an impeller and the seal part 44a is ensured with high precision to improve the sealing property and prevent the contact with the impeller.
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Patent Agency Ranking
公开(公告)号：JP2001355531A
公开(公告)日：2001-12-26
申请号：JP2001115132
申请日：2001-04-13
Applicant: DENSO CORP
Inventor： KOBAYASHI ATSUSHIGE , OI KIYOTOSHI , TAKEI OAKI , EBIHARA YOSHIO
Abstract: PROBLEM TO BE SOLVED: To provide a fuel pump with high pumping efficiency. SOLUTION: An impeller 30 has blade pieces 31 around the whole surface of its outer circumferential edge. Partitions 36 are disposed in grooved spaces 39 formed between the circumferentially adjoining blade pieces 31 and partition parts of the grooved spaces 39 in an approximately center of the width in the rotational shaft direction of the impeller 30 from the roots of the blade pieces 31. The root side of the blade piece 31 is inclined rearward in the rotational direction, while its tip side in the diametrical outside is inclined frontward in the rotational direction. A recess in a front face 32 is gradually and sequentially reduced from the root of the blade piece 31 toward the tip in the diametrical outside and sequentially enlarged inward from the both ends in the rotational shaft direction. The recess in the root side of the front face 32 is large so that the fuel easily flows from the root side of the blade piece 31 towards the grooved space 39 by the rotation of the impeller 30. The recess of the front face 32 is reduced so that the flow rate of the fuel flowing to the tip side of the grooved space 39 increases.
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公开(公告)号：JP2007255405A
公开(公告)日：2007-10-04
申请号：JP2006084811
申请日：2006-03-27
Applicant: Denso Corp , 株式会社デンソー
Inventor： KOBAYASHI ATSUSHIGE
Abstract: PROBLEM TO BE SOLVED: To provide a fuel pump with increased pump efficiency. SOLUTION: In a disk-like impeller 30, vane grooves 36 are formed in the rotating direction, and an annular peripheral part surrounding the vane groove 36 is formed on the outside of the vane grooves. Fuel sucked from a fuel inlet formed in a pump cover 20 is boosted by the rotation of the impeller 30 in pressure boosting passages 202, 203 on both sides of the impeller 30 in the thickness direction, and force-fed from a discharge port formed in a pump cover 22. The width of the outer peripheral part of the impeller 30 in the radial direction is set to be 1.3 to 2.2 mm. The interval Ds between the impeller 30 and the pump covers, 20, 22 in the axial direction is set to be 5 to 45 μm. The interval Dr between the impeller 30 and the pump cover 22 in the radial direction is set to be 50 to 300 μm. COPYRIGHT: (C)2008,JPO&INPIT
Abstract translation: 要解决的问题：提供具有提高的泵效率的燃料泵。 解决方案：在盘状叶轮30中，沿旋转方向形成叶片槽36，并且在叶片槽的外侧形成围绕叶片槽36的环形周边部分。 从形成在泵盖20中的燃料入口吸入的燃料通过在叶轮30的厚度方向两侧的增压通路202,203中的叶轮30的旋转而被增压，并从形成在叶轮30的排出口 泵罩22.叶轮30的径向外周部的宽度设定为1.3〜2.2mm。 叶轮30和泵罩20,22之间的轴向间隔Ds设定为5〜45μm。 叶轮30和泵盖22之间的径向间隔Dr设定为50〜300μm。 版权所有（C）2008，JPO＆INPIT
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公开(公告)号：JP2001304062A
公开(公告)日：2001-10-31
申请号：JP2000120444
申请日：2000-04-21
Applicant: DENSO CORP
Inventor： KOBAYASHI ATSUSHIGE
Abstract: PROBLEM TO BE SOLVED: To provide a fuel supply device reducing electric power consumption, having a simple structure and having resistance against fuel. SOLUTION: A fuel storage means 30 is provided with a support member 31, a cup member 35, a coil spring 40 and a housing 41. The support member 31 is integrally molded by a flange member 11 and resin. The cup member 35 is formed in a bottomed cylindrical shape. A cylindrical part 37 of the cup member 35 is reciprocatably fitted to an outer peripheral wall of the support member 31. A fuel chamber 62 is formed of the outer peripheral wall of the support member 31 and an inner peripheral wall of the cup member 35. The fuel chamber 62 communicates with an inlet chamber 60 via a communicating passage 61. When the fuel chamber 62 stores a prescribed quantity of fuel, a pump body 20 is stopped. Then, the fuel of the fuel chamber 62 is pushed out to the inlet chamber 60 by passing through the communicating passage 61 by energizing force of the coil spring 40, and is discharged from a discharge pipe 12 by passing through a filter element 15.
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公开(公告)号：JP2001289341A
公开(公告)日：2001-10-19
申请号：JP2000104590
申请日：2000-04-06
Applicant: DENSO CORP
Inventor： KOBAYASHI ATSUSHIGE
IPC: F02M37/00 , F02M69/00 , F16K17/04 , F16K31/126
Abstract: PROBLEM TO BE SOLVED: To provide a pressure adjusting device capable of accurately adjusting the fluid pressure and easy to be worked. SOLUTION: A pressure regulator 10 is used for a return-less fuel supply system provided in a in-tank type fuel pump so as to constantly adjust the fuel pressure to be discharged from the fuel pump. An adjusting member 31 is housed in a valve seat member 30 freely to be reciprocated. A metal abutment part 40 is formed into a plane shape so as to abut on a valve seat 30b in both planes thereof. When the fuel pressure of a fuel outlet 103 exceeds the predetermined pressure, a pressure receiver member 15, the adjusting member 31 and the abutment part 40 are displaced to a second chamber 101 side, and the abutment part 40 seats on the valve seat 30b so as to cut the fuel flow flowing from a fuel inlet 102 into a first chamber 100. Even if the abutment part 40 obliquely seats on the valve seat 30b, a conical recessed part 40a of the abutment part 40 slides with a projecting part 34 of the adjusting member 31 so as to correct the inclination of the abutment part 40 in relation to the valve seat 30b, and the abutment part 40 seats on the valve seat 30b in the plane thereof.
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公开(公告)号：JPH09126179A
公开(公告)日：1997-05-13
申请号：JP28899095
申请日：1995-11-07
Applicant: DENSO CORP
Inventor： ITO MOTOYA , KOBAYASHI ATSUSHIGE
Abstract: PROBLEM TO BE SOLVED: To form center blade grooves and outer peripheral blade grooves, into a planar impeller having a uniform wall thickness which are formed corresponding to a center pump passage and an outer peripheral pump passage formed in a casing, concentric with each other. SOLUTION: In an impeller 18, several arcuate grooves are formed circumferentially in a part extending from the outer peripheral part to a position near to the rotational center so as to be used as center blade grooves, and several arcuate grooves are circumferentially formed in an outer peripheral part so as to be used as outer peripheral impeller grooves 26. Meanwhile, in the inner surface of an impeller chamber 19 of a casing 20, center pump passage 33 corresponding to the center blade grooves 25 and outer peripheral pump passages 33 corresponding to the outer peripheral blade grooves 26 are formed concentric with one another, and the leading ends of the center pump passages 33 are connected to a suction port and the trailing ends thereof are connected to the leading ends of the outer peripheral pump passages 34 through communication passages while the trailing ends of the outer peripheral pump passages are connected to a discharge port.
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