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公开(公告)号：JP2002357191A
公开(公告)日：2002-12-13
申请号：JP2002027949
申请日：2002-02-05
Applicant: DENSO CORP
Inventor： KUSAYA KATSUHIKO , MORI YUKIO , ITO MOTOYA
Abstract: PROBLEM TO BE SOLVED: To prevent reduction of delivery performance by restricting abrasion at an axial direction end surface of a ring 3c of an impeller 3. SOLUTION: A diameter D1 of the impeller 3 is set to be shorter than an outer diameter D2 of pump flow passages 2b and 4b, and the axial direction end surface 3f of the ring 3c is disposed on the inner side of an axial direction end surface of a blade piece 3a, that is of an axial direction end surface 3g of the impeller 3. Contact slide of the axial direction end surface 3f of the ring 3c corresponding to a blade groove 3b as a most part of the ring 3c of the impeller 3, that is a part where circumferential speed becomes the largest, with axial direction end surfaces of a pump casing 2 and a pump cover 4 is thus eliminated. Slide abrasion at this part in a conventional turbine pump is restricted, and reduction of delivery performance of the turbine pump 1 can be securely prevented.
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公开(公告)号：JP2002262519A
公开(公告)日：2002-09-13
申请号：JP2001058721
申请日：2001-03-02
Applicant: DENSO CORP
Inventor： ITO MOTOYA , MOROTO KIYONORI
Abstract: PROBLEM TO BE SOLVED: To provide a rectifier capable of electrically conducting a plurality of sets of segments facing each other by one metal plate 12. SOLUTION: On the metal plate 12 included in a rectifier, there are provided six segment connecting parts 19 which are electrically connected with individual segments, and a space between the segment connecting parts 19 adjacent in the circumferential direction are insulated by slits 26 provided in the radial direction. On the metal plate 12, there are provided continuity parts 18 which link the segment connecting parts 19 facing each other and the continuity parts 18, is formed to be lower than other a plate surface by one step of the thickness thereof. In the six segments, the segments adjacent in the circumferential direction are insulated by the slits 26, and the two segments facing each other are electrically conducted through segment connecting parts 19 and the continuity parts 18 of the metal plate 12.
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公开(公告)号：JP2002202018A
公开(公告)日：2002-07-19
申请号：JP2001026269
申请日：2001-02-02
Applicant: DENSO CORP
Inventor： TAKAGI MASATOSHI , ITO MOTOYA , KUSAYA KATSUHIKO
Abstract: PROBLEM TO BE SOLVED: To reduce sliding resistance (friction loss) of an outer gear to a pump easing of a trochoidal gear type fuel pump and reduce the pulsation of delivery pressure. SOLUTION: Two inner gears 25, 26 are disposed with a partition wall 28 sandwiched between them with eccentricity on the inner peripheral side of the outer gear 24, and the eccentric directions of both inner gears 25, 26 are shifted from each other to the opposite sides by 180 deg.. Thus, the load in the direction of the outside diameter due to fuel pressure rise is applied from two inner gears 25, 26 to one outer gear 24 in the opposite directions by 180 deg. not to be offset load, so that the sliding resistance of the outer gear 24 to the cylindrical easing 21 is reduced. The number of teeth of the outer gear 24 is set to an odd number, and the number of teeth of the inner gears 25, 26 is set to an even number. Thus, the rotational phases of two inner gears 25, 26 are shifted by half pitch, the phases of pulsation wave of delivery output of two inner gears 25, 26 are shifted by half period of the pulsation wave so as to reduce the pulsation of delivery pressure.
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公开(公告)号：JP2001263187A
公开(公告)日：2001-09-26
申请号：JP2000076035
申请日：2000-03-17
Applicant: DENSO CORP
Inventor： MOROTO KIYONORI , ITO MOTOYA
Abstract: PROBLEM TO BE SOLVED: To provide a check valve capable of holding pressure of fuel remaining on the side of an engine by lowering it to a degree not to interfere with following starting of the engine at the time when a pump stops. SOLUTION: A valve seat 22 for pressure adjustment is provided in a passage 18 of fuel, and a valve body 23 for pressure adjustment to make contact with and separate from the valve seat 22 for pressure adjustment is energized upward by a compression coil spring 24. A valve body 27 for checking provided above the valve body 22 for pressure adjustment closes a passage 25 of the valve body 22 for pressure adjustment by making closely contact with a valve seat 26 for checking provided on the valve body 22 for pressure adjustment at the time when a pump stops. In this state, in the case when pressure of fuel remaining on the side of an engine exceeds a value equivalent to energizing force of the compression coil spring 24, the valve body 23 for pressure adjustment moves downward with the valve body 27 for checking by its pressure. Consequently, as a clearance is made between the valve seat 22 for pressure adjustment and the valve body 23 for pressure adjustment and fuel on the side of the engine flows back to the side of the pump through the clearance, fuel pressure on the side of the engine is lowered.
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公开(公告)号：JP2000324781A
公开(公告)日：2000-11-24
申请号：JP12863899
申请日：1999-05-10
Applicant: DENSO CORP
Inventor： MOROTO KIYONORI , ITO MOTOYA
Abstract: PROBLEM TO BE SOLVED: To improve motor efficiency by generating rotation torque effectively, in a 5-phase brushless motor. SOLUTION: When a motor is driven, currents are made to simultaneously flow in by three phases from among 5-phase armature coils A21-E21. In this case, currents are made to flow only in 3-phases armature coils (that is, 3-phase armature coils having a large percentage of contribution to generation of rotation torque) facing the boundary part of an N-pole and an S-pole of a magnet rotor 23. As compared with the case of 4-phase current flowing, rotational torque can be generated effectively, and motor efficiency can be improved. In this case, it is preferable that the number of poles of a stator 19 be set as 5×n, where (n) is a natural number, and the number of poles of the magnet rotor 23 is set as 4×n. Thereby the boundary part of the N pole and the S pole of the magnet rotor 23 can be made to surely face the 3-phase armature coils which turn into the current flowing phases from among the 5-phase armature coils A21-E21.
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Patent Agency Ranking
公开(公告)号：JP2000152589A
公开(公告)日：2000-05-30
申请号：JP32352398
申请日：1998-11-13
Applicant: DENSO CORP
Inventor： ITO MOTOYA
Abstract: PROBLEM TO BE SOLVED: To make the revolution of a brushless motor variable without using PWM control and prevent the generation of switching noise. SOLUTION: The armature coils of respective phases are composed of lap windings of thick wire coils U21a-W21a which have low resistance values and thin wire coils U21b-W21b which have high resistance values. Currents applied to the respective coils are individually switched by MOS-FET's 36-47. When a requested revolution is high, a driving circuit 31 applies currents to both the thick wire coils U21a-W21a and the thin wire coils U21b-W21b. With this process, the resultant resistance values of the coils of the respective phases are reduced and the coil currents of the respective phases are increased and hence a motor revolution is increased. When a requested revolution is low, currents are not applied to the thick wire coils U21a-W21a but to the thin wire coils U21a-W21b only. With this process, the coil resistance values of the respective phases are increased and hence the coil currents of the respective phases are reduced and hence the revolution of the motor is reduced.
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公开(公告)号：JP2000032689A
公开(公告)日：2000-01-28
申请号：JP19760898
申请日：1998-07-13
Applicant: DENSO CORP
Inventor： ITO MOTOYA
Abstract: PROBLEM TO BE SOLVED: To easily manufacture a stator by effectively converting a magnetic flux that a rotor has to a torque. SOLUTION: A stator 6 is provided with an inner-periphery part core 12 with a yoke part 15, that opposes a rotor 7 with a specific interval and a plurality of teeth 16 that are formed in one piece with the yoke part 15, project in the direction of an outer diameter, and are arranged in a peripheral direction, a coil winding 14 that is wound around teeth 16, and an outer peripheral part core 13 for fixing the outer-periphery end of the teeth 16, where the coil winding 14 is wound. In this case, a nonmagnetic part 17 that is constituted by reforming the magnetic body of the yoke part 15 is provided between the teeth 16 of the yoke part 15 of the inner peripheral part core 12.
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公开(公告)号：JPH11280579A
公开(公告)日：1999-10-12
申请号：JP8378598
申请日：1998-03-30
Applicant: Denso Corp , 株式会社デンソー
Inventor： ITO MOTOYA
IPC: B60K15/03 , F02M37/00 , F16K1/14 , F16K11/044 , F16K11/056
Abstract: PROBLEM TO BE SOLVED: To provide an inexpensive valve device capable of opening and closing a valve by utilizing the size of specific gravity of fuel and air, without using a solenoid valve.
SOLUTION: By utilizing the size of specific gravity of fuel and air and a head difference of each tank of a two-vessel type fuel tank, a ball-shaped valve element 31 moves at the inside of a branch chamber 25 from a high pressure side to a low pressure side. By this valve element 31, a low pressure side fuel passage 32 or 33 is closed. By opening a high pressure side fuel passage 32 or 33, fuel is sucked from the high pressure side passage 32 or 33 to a discharge passage 34. Therefore, because fuel on a side whose liquid level is high is consumed earlier than fuel on a side whose liquid level is low, fuel is discharged from the discharge passage 34 in a direction that a pressure difference becomes small. Therefore, because fuel having a liquid surface of the high liquid level is preferentially sucked by a fuel pump, fuel can be consumed in a well-balanced and equal state from a plurality of fuel storing parts.
COPYRIGHT: (C)1999,JPOAbstract translation: 要解决的问题：提供一种廉价的阀装置，其能够利用燃料和空气的比重尺寸来打开和关闭阀，而不使用电磁阀。 解决方案：通过利用燃料和空气的比重尺寸和双容器型燃料箱的每个罐的头部差异，球形阀元件31在分支室25的内部从高压侧移动 到低压侧。 通过该阀元件31，低压侧燃料通路32或33闭合。 通过打开高压侧燃料通路32或33，将燃料从高压侧通路32或33吸入排出通路34.因此，由于液位高的一侧的燃料比侧面的燃料早 液位低时，燃料从压力差变小的方向从排出通路34排出。 因此，由于具有高液位的液面的燃料优先被燃料泵吸入，所以可以从多个燃料储存部件中以均衡均衡的状态消耗燃料。
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公开(公告)号：JPH11168859A
公开(公告)日：1999-06-22
申请号：JP33178997
申请日：1997-12-02
Applicant: DENSO CORP
Inventor： ITO MOTOYA , KIYOSE KENZO
Abstract: PROBLEM TO BE SOLVED: To provide a commutator which is capable of reducing the contact voltage drop between a brush and a touching section. SOLUTION: A commutator 60 consists of a contacting section 61 which slides on brushes and a supporting sections made out of resin for supporting the contacting section 61. The contacting section 61 is divided into eight segments 62 insulated from each other by grooves 64. A groove 65 is formed radially for each segment 62 on its sliding-on-brush side. Since the depth of each groove 65 is shallower than the thickness of each segment 62, segments 62 on both sides of a groove 65 interposed between them are connected electrically. By having fuels flow out radially outside along the grooves 65 by the centrifugal force of the commutator 60, along with scraping out a fuel between each brush and the touching section 61 by the grooves 65 in addition to the grooves 64 with the rotation of the commutator 60, the thickness of a liquid film formed between each brush and commutator 60. Between each brush and the contacting section 61 becomes smaller, and the contact voltage drop between each brush and the touching section 61 is reduced.
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公开(公告)号：JPH11122972A
公开(公告)日：1999-04-30
申请号：JP28084697
申请日：1997-10-14
Applicant: DENSO CORP
Inventor： ITO MOTOYA , MATSUDA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To provide a fuel-supplying device that can use a power switching element with a small capacity in the drive circuit of a brushless motor. SOLUTION: An impeller for supplying fuel to an engine through rotation, and at the same time a three-phase brushless motor being connected to the impeller are provided in a casing. In the casing, a drive circuit 23 is placed and power MOS transistors 36, 37, 38, 40, 41, and 42 are connected to stator coils 30-32 in parallel. The drive circuit 23 allows the power MOS transistors 36, 37, 38, 40, 41, and 42 to be turned on and off, based on the position detection of the magnet rotor of the brushless motor for generating a rotating magnetic field. Current flowing through the power MOS transistors 36-38 and 40-42 becomes the half of a rated current I of the stator coils 30-32.
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