公开(公告)号：JPH10205476A

公开(公告)日：1998-08-04

申请号：JP1275097

申请日：1997-01-27

Applicant: DENSO CORP

Inventor： MATSUMOTO TATSUYA ,  ITO MOTOYA ,  KOBAYASHI ATSUSHIGE ,  KUROIWA KAZUNARI

IPC: F02M37/04 ,  F02M37/08 ,  F02M37/20 ,  F04D5/00 ,  F04D15/00 ,  F04D23/00

Abstract: PROBLEM TO BE SOLVED: To prevent reduction of a discharge flow rate at a high air temperature period, in a fuel pump for an internal combustion engine consisting of a regeneration pump. SOLUTION: A given range from the starting end of a pump flow passage forms a fuel introduction part 43 and a following part forms a boosting flow passage part 44. The upper inside part of the fuel introduction part 43 consists of a vapor reservoir part 45 the middle part of which has a specified depth D1 deeper than the depth D2 of a boosting flow passage part 44; and a guide part 46 having depth gradually decreased from the vapor reservoir part 45 toward the boosting flow passage part 44. Vapor contained in liquid fuel sucked in the fuel introduction part 43 gathers in a vapor reservoir part 45. Thereafter, the liquid fuel flows a bit by a bit from the vapor reservoir part 45 to a guide part 46 along with rotation of an impeller 25 and when the liquid fuel flows in the boosting flow passage part 44, it is bled through a vapor bleed hole 47.

公开(公告)号：JP2008064030A

公开(公告)日：2008-03-21

申请号：JP2006242833

申请日：2006-09-07

Applicant: Denso Corp ,  株式会社デンソー

Inventor： ITO MOTOYA ,  TAKAGI MASATOSHI

IPC: F02M37/10

CPC classification number: F04D5/002 ,  F02M37/08 ,  F02M2037/082 ,  H01R39/40 ,  H02K5/148 ,  H02K7/14 ,  H02K13/10

Abstract: PROBLEM TO BE SOLVED: To provide a fuel pump capable of suppressing electric corrosion of a terminal even when high conductive components are included in fuel.
SOLUTION: The fuel pump comprises a pump portion press-sending fuel, a motor portion driving the pump portion, a brush sliding with a commutator and passing an electric current through the commutator, a brush spring adding elastic force on the brush and pressing the brush against the commutator, a positive electrode side outside connecting terminal 51 and a negative electrode side outside connecting terminal 52 to which electric power becoming a driving source of the motor portion is supplied from the outside through the brush, and a terminal supporting member of an insulation element supporting the positive electrode terminal and the negative electrode terminal. On a mold portion 51M constituting the terminal supporting member, a load receiving portion 501 abutting on the brush spring and receiving the reaction force of the elastic force is provided.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供即使在燃料中包括高导电性成分的情况下也能够抑制端子的电腐蚀的燃料泵。 解决方案：燃料泵包括泵部分压力发送燃料，驱动泵部分的电动机部分，与换向器滑动并使电流通过换向器的电刷，在电刷上增加弹力的刷子弹簧 将刷子压靠在换向器上，正面电极侧外侧连接端子51和负极侧外侧连接端子52，电力部分的电力成为电动机部分的驱动源，通过电刷从外部供给，端子支撑部件 支撑正极端子和负极端子的绝缘元件。 在构成端子支撑构件的模具部分51M上，设置有抵靠在电刷弹簧上并承受弹力反作用力的载荷承受部分501。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2006170218A

公开(公告)日：2006-06-29

申请号：JP2006061310

申请日：2006-03-07

Applicant: Denso Corp ,  株式会社デンソー

Inventor： KUSAYA KATSUHIKO ,  ITO MOTOYA ,  TAKAGI MASATOSHI ,  MARUYAMA KOJI

IPC: F04D5/00 ,  F02M37/08 ,  F04D29/22

Abstract: PROBLEM TO BE SOLVED: To improve pump efficiency by preventing travel of an impeller caused by imbalance of pressure inside a pump housing.
SOLUTION: In this impeller 160, an annular part 181 is provided at the outer periphery of a bulkhead to make a blade channel 166 on one side and a blade channel 171 on the other side independent from each other and form a communicating hole 176 for communicating one side with the other side at a position off the blade channel in the radial direction. Since the communicating means is off the blade channel, specifications of the blade channel can be decided independently from specifications of the communicating means to improve pump efficiency. As a result, the impeller capable of preventing travel due to imbalance of pressure and the turbine type fuel pump capable of improving pump efficiency can be realized.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：通过防止由泵壳内的压力不平衡引起的叶轮行程来提高泵的效率。 解决方案：在该叶轮160中，环形部分181设置在隔板的外周，以使一侧的叶片通道166和另一侧上的叶片通道171彼此独立地形成连通孔 176，用于在离开叶片通道的径向方向上的一侧与另一侧连通。 由于通信装置离开叶片通道，所以可以独立于通信装置的规格来决定叶片通道的规格，以提高泵的效率。 因此，可以实现能够防止由于压力不平衡而导致的行驶的叶轮和能够提高泵效率的涡轮式燃料泵。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2004328987A

公开(公告)日：2004-11-18

申请号：JP2003326344

申请日：2003-09-18

Applicant: Denso Corp ,  株式会社デンソー

Inventor： MOROTO KIYONORI ,  ITO MOTOYA ,  KIYOSE KENZO ,  IWANARI EIJI ,  KOBAYASHI MASAYUKI

IPC: F02M37/08 ,  F02M37/10 ,  F04D5/00 ,  F04D7/02 ,  F04D13/08 ,  F04D29/00 ,  H02K3/18 ,  H02K3/46 ,  H02K13/00 ,  H02K15/02 ,  H02K23/00 ,  H02K23/66

Abstract: PROBLEM TO BE SOLVED: To provide a motor in which the discharge abrasion of a brush and a segment is prevented, and to provide a fuel pump, a commutator and a process for manufacturing a commutator. SOLUTION: A commutator 70 has six segments 72 arranged in the rotational direction and is fixed to one axial end part of an armature. When the commutator 70 rotates together with the armature, each segment 72 touches a brush sequentially. Each segment 72 is connected electrically with a terminal 74 through an intermediate terminal 73. Three nonadjacent terminals 74 out of six terminals 74 located alternately in the rotational direction are electrically connected directly with the intermediate terminals 73 facing the radial opposite side. A capacitor 78 is electrically connected directly with a terminal 74 adjacent in the rotational direction. When the brush separates from the segment 72 as the armature rotates, electromagnetic energy stored in the coil of the armature is stored temporarily in the capacitor 78 and thereby no discharge take place between the brush and the segment 72. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种其中防止刷子和片段的排出磨损并且提供燃料泵，换向器和制造换向器的方法的电动机。 解决方案：换向器70具有沿旋转方向布置的六个段72，并且固定到电枢的一个轴向端部。 当换向器70与电枢一起旋转时，各段72顺序地接触电刷。 每个段72通过中间端子73与端子74电连接。六个端子74中的三个位于旋转方向上交替布置的端子74直接与面向径向相对侧的中间端子73电连接。 电容器78与旋转方向相邻的端子74直接电连接。 当电枢绕电枢旋转时，电刷与电极72分离，存储在电枢线圈中的电磁能量临时存储在电容器78中，从而在电刷和片段72之间不会发生放电。版权所有（C） ）2005年，日本特许厅和NCIPI

公开(公告)号：JP2004129425A

公开(公告)日：2004-04-22

申请号：JP2002292099

申请日：2002-10-04

Applicant: Denso Corp ,  株式会社デンソー

Inventor： ITO MOTOYA ,  SAKAI HIROMI ,  KONO KEISUKE ,  IWANARI EIJI

IPC: F02M37/08 ,  F02M37/10 ,  H02K7/14 ,  H02K13/00

Abstract: PROBLEM TO BE SOLVED: To provide a motor in which the wear of a brush or a segment due to discharge is prevented, and to provide a fuel pump which uses the motor. SOLUTION: A segment electrode 74 is arranged outside the radial direction of the segment 71 and is electrically connected to the segment 71 located at the same rotational position of the the segment electrode. A brush electrode 84 is positioned at the front the brush 80 in the rotating direction of a rotor 40 outside the radial direction of the brush 80. The brush electrode 84 is electrically connected to the brush 80. The segment electrode 74 is in contact with the brush electrode 84, when the segment 71 separates from the brush 80 associated with the rotation of the rotor 40. After the segment 71 separates from the brush 80, the segment electrode 74 separates from the brush electrode 84; and discharge occurs between the brush electrode 84 and the segment electrode 74. Accordingly, no discharge occurs between the brush 80 and the segment 71. COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2002235626A

公开(公告)日：2002-08-23

申请号：JP2001034873

申请日：2001-02-13

Applicant: DENSO CORP

Inventor： ITO MOTOYA

IPC: B60K15/077 ,  F02M37/00 ,  F02M37/10 ,  F02M37/18

Abstract: PROBLEM TO BE SOLVED: To provide a fuel transfer device capable of introducing liquid fuel into a reserve tank 2 by a simple constitution by adopting a structure fixing a Venturi tube 7 to the reserve tank 2. SOLUTION: The upper end part of a nozzle 6 for discharging the liquid fuel from a pump chamber 5 of a fuel pump to the Venturi tube 7 is press-fitted and fixed to the inside of a fuel discharge hole 10 in a pump cover 3 of the fuel pump and the left side of the Venturi tube 7 for transferring the liquid fuel sucked from the introduction pipe to the inside of the reserve tank 2 is press-fitted and fixed to the inside of a fitting hole 8 of a sidewall part in the adjacency of the bottom face of the reserve tank 2. This constitution can constitute the sidewall part in the adjacency of the bottom face of the reserve tank 2, the pump cover 3, the nozzle 6, and the Venturi tube 7 into simple shapes.

公开(公告)号：JP2002122053A

公开(公告)日：2002-04-26

申请号：JP2000314798

申请日：2000-10-16

Applicant: DENSO CORP

Inventor： YAMADA KATSUHISA ,  ITO MOTOYA ,  OKADA KINGO

IPC: F02M25/08 ,  F02M37/00 ,  F02M37/10

Abstract: PROBLEM TO BE SOLVED: To provide a fuel-feeding system for cooling a pump controller and miniaturizing a canister. SOLUTION: A fuel pump 20 is housed in a fuel tank 10. The pump controller 30 feeds power to a pump body 22 according to engine operation state, so that the pump body 22 of the fuel pump discharges a fuel quantity necessary for the engine and controls the rotational frequency of the pump body 22. The canister 40 adsorbs vaporized fuel inside the fuel tank 10 by activated carbon housed in its interior. Piping 105 is connected to the canister 40, to introduce the atmosphere inside the canister 40. When a solenoid valve 106 is opened, the atmosphere is introduced inside the canister 40 from the piping 105. Since the piping 105 is in contact with the pump controller 30, the atmosphere introduced to the canister 40 by the piping 105 is heated by the pump controller 30 and the temperature of the canister 40 is increased by introducing the heated atmosphere.

公开(公告)号：JP2000228890A

公开(公告)日：2000-08-15

申请号：JP10822699

申请日：1999-04-15

Applicant: DENSO CORP

Inventor： ITO MOTOYA ,  MOROTO KIYONORI

IPC: H02P6/08 ,  F02M37/08 ,  F04C15/00 ,  F04D5/00 ,  H02K29/00 ,  H02P6/06

Abstract: PROBLEM TO BE SOLVED: To provide a brushless motor capable of reducing the cost of a drive circuit and reducing switching noise. SOLUTION: A five-phase brushless motor is energized at a four-phase armature coil by switching MOSFETs 36-45 using a parallel path. The current passing through the MOSFETs 36-45 becomes one half that of the conventional three- phase full-wave driven system, so that the respective MOSFETs 36-45 can use an inexpensive element having lower current capacity. When exciting phases are switched, one of two exciting phases is turned off at one exciting path of the parallel paths, and one non-exciting phase is turned on. As a result, the change in the total current of the motor become low in switching exciting phases, so as to reduce the switching noise. When required rotation speed is low, the motor torque is reduced to cause the rotational speed of the motor to be reduced by energizing only two-phase armature coil (two-phase energization). As a result, the rotational speed of the motor can be made variable without conducting PWM control.

公开(公告)号：JP2000175418A

公开(公告)日：2000-06-23

申请号：JP34769198

申请日：1998-12-08

Applicant: DENSO CORP

Inventor： ITO MOTOYA

IPC: H02K29/00 ,  H02K1/27 ,  H02K3/18 ,  H02K21/14

Abstract: PROBLEM TO BE SOLVED: To centrally wind an armature coil with one phase at a time for each tooth of a stator in a sensorless system. SOLUTION: Armature coils U21-W21 are centrally wound by one phase at a time for each tooth 20 of a stator 19. By forming a permanent magnet 26 for field, so that a magnetization surface facing an armature coil 21 is in a circular recessed surface shape, a magnetic flux distribution for the armature coil of each permanent magnet 25 changes in a rotary direction. As a result, even if only one permanent magnet 26 faces a non-energized phase coil, a magnetic flux that is interlinked with a non-energized phase coil changes due to the rotation of a magnet rotor 23, and an induction voltage is generated in the non-energized phase coil. By detecting the induction voltage, the rotary position of the magnet rotor 23 can be detected, thus driving a brushless motor 14 in a sensorless system, regardless of the central winding system.

公开(公告)号：JPH11332204A

公开(公告)日：1999-11-30

申请号：JP3614699

申请日：1999-02-15

Applicant: DENSO CORP

Inventor： ITO MOTOYA

IPC: H02K29/00 ,  F04D5/00 ,  H02K5/22 ,  H02K7/14 ,  H02K15/02 ,  H02K21/22

Abstract: PROBLEM TO BE SOLVED: To provide a brushless motor whose number of components is small and which is easy to manufacture, the manufacturing method of the brushless motor and a fuel pump using the brushless motor. SOLUTION: Coils 37 are connected to the respective terminals of a control circuit which switches field currents supplied to the coils 37 in a terminal unit 43. The terminal unit 43 consists of a U-phase terminal 44, a V-phase terminal 45, a W-phase terminal 46, an N-phase terminal 47, a (+) terminal 48 and a (-) terminal 49. The respective terminals are electrically insulated from each other with slits 100, 101 and 102. The nails 42a of the terminal unit 43 are electrically connected to the coils 37 of the respective phases by fusing. After one terminal base material is molded in a terminal support member 41 beforehand by insert-molding, the terminal base material is divided into the respective terminals of the terminal unit 43. With this constitution, the number of components to be assembled can be reduced and, further, the terminals are easily positioned. Therefore, a motor can be manufactured easily.