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1. 发明专利

JP2001050174A FUEL SUPPLY PUMP 失效
公开(公告)号：JP2001050174A
公开(公告)日：2001-02-23
申请号：JP21957799
申请日：1999-08-03
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： TAKAO KUNIHIKO , HEIKO KENJI , NOGAMI TADAHIKO , YAMADA HIROYUKI , TAKAHASHI YUKIO , SAITO JUNJI , ABE MASAMI
IPC分类号： F02M47/00 , F02M55/02 , F02M59/46 , F04B53/10 , F16K15/04
摘要： PROBLEM TO BE SOLVED: To provide a fuel supply pump capable of stabilizing a position of a value element in constitution of a check valve as a discharge valve and a suction valve and improving performance of the pump by speedily and certainly seating the valve element on a seating part and low in cost. SOLUTION: It is possible to improve a sealing property at a tapered part as it is possible to stably seat a valve element 26a on a valve seat 26b as well as to hold the valve element 26a at a stable position in a passage by forming a restricting means or the tapered part on a valve element holding member 26c to hold the valve element 26a. Additionally, it is possible to constitute a suction valve or a discharge valve in simple constitution.

2. 发明专利

JP2003049774A Hermetic electric compressor and refrigerating/air- conditioning device 审中-公开
标题翻译：电磁式压缩机和制冷/空调装置
公开(公告)号：JP2003049774A
公开(公告)日：2003-02-21
申请号：JP2001238063
申请日：2001-08-06
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MITSUYA SHIYUNICHI , TAKAO KUNIHIKO , TAGAWA SHIGETARO , YAZAWA HIDEKI
IPC分类号： F04B39/00
摘要： PROBLEM TO BE SOLVED: To reduce noise and vibration by reducing pressure pulsation of discharge gas in a hermetic electric compressor.
SOLUTION: The hermetic electric compressor comprises a closed container 14, a compression element disposed in the closed container 14, a cylinder 1 forming a working chamber 13 of the compression element, a piston 2 movable in the cylinder 1 to form the working chamber 13 together with the cylinder 1, a discharge valve 9 for opening and closing a discharge opening 8a of the working chamber 13, and a discharge chamber member 10 having a discharge chamber 10a formed on a discharge side of the discharge valve 9. A volume varying means 50 is provided to vary the volume of the discharge chamber 10a according to pressure pulsation of discharge gas discharged into the discharge chamber 10a.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：通过减少密封式电动压缩机中的放电气体的压力脉动来减少噪声和振动。解决方案：密闭式电动压缩机包括一个密封容器14，一个设置在密封容器14中的压缩元件，一个形成压缩元件工作室13的气缸1，一个可在气缸1中移动以形成工作室13的活塞2 气缸1具有用于打开和关闭工作室13的排出口8a的排出阀9和排出室10，其具有形成在排出阀9的排放侧的排放室10a。体积变化装置50 被设置成根据排出到排出室10a的排出气体的压力脉动来改变排出室10a的体积。

3. 发明专利

JP2002276506A FUEL SUPPLY DEVICE AND ITS CONTROLLING METHOD 失效
公开(公告)号：JP2002276506A
公开(公告)日：2002-09-25
申请号：JP2001073280
申请日：2001-03-15
申请人： HITACHI LTD
发明人： TOKUO KENICHIRO , HEIKO KENJI , NOGAMI TADAHIKO , TAKAO KUNIHIKO , YAMADA HIROYUKI
IPC分类号： F02M37/00 , F02D41/38 , F02M37/06 , F02M37/08 , F02M45/06 , F02M51/04 , F02M59/10 , F02M59/36 , F02M63/02 , F04B49/24
摘要： PROBLEM TO BE SOLVED: To control a delivering flow rate without increasing responsiveness of a variable displacement mechanism even when a reciprocating cycle of a plunger is short. SOLUTION: The variable displacement mechanism is driven once every two or more reciprocating motions of the plunger of a high pressure fuel pump, thereby controlling the delivering flow rate.

4. 发明专利

JP2002130131A CLOSED TYPE MOTOR-DRIVEN COMPRESSOR 失效
公开(公告)号：JP2002130131A
公开(公告)日：2002-05-09
申请号：JP2000317705
申请日：2000-10-18
申请人： HITACHI LTD
发明人： TAKAO KUNIHIKO , MITSUYA SHIYUNICHI , TAGAWA SHIGETARO , YAZAWA HIDEKI , KONNO HAJIME
IPC分类号： F04B39/10
摘要： PROBLEM TO BE SOLVED: To reduce pressure losses at the delivery port part of a closed type motor-driven compressor. SOLUTION: A projection 36 in the form of a truncated cone is formed at the cylinder head 20 side end of a piston 18. The cylinder head 20 is provided with a delivery port 22 for the projection 36 to fit therein. The inner surface of the delivery port 22 is formed with an inclined surface 22a inclined in the opposite direction to the outer inclined surface of the projection 36. This arrangement can fully secure the cross-sectional area of a passage between the inner surface of the port 22 and the outer surface of the projection 36 and reduce pressure losses in the passage portion during delivery stroke.

5. 发明专利

JP2002031018A HIGH-PRESSURE FUEL PUMP 失效
公开(公告)号：JP2002031018A
公开(公告)日：2002-01-31
申请号：JP2000217205
申请日：2000-07-13
申请人： HITACHI LTD
发明人： HEIKO KENJI , TOKUO KENICHIRO , NOGAMI TADAHIKO , TAKAO KUNIHIKO , YAMADA HIROYUKI
IPC分类号： F02M59/10 , F02M59/34 , F02M59/44 , F04B9/04 , F04B53/10 , F04B53/14
摘要： PROBLEM TO BE SOLVED: To provide a single cylinder plunger type high-pressure fuel pump capable of preventing a volume efficiency particularly at a high speed from lowering due to the delay of closing of intake and exhaust valves. SOLUTION: A cam 100 is formed in such a cam profile that the maximum peak of a cam speed is positioned in an area of approximately 1/3 to 1/2 of a discharge stroke in the discharge stroke of a plunger 2 from a bottom dead center to a top dead center. By this, a theoretical flow rate is reduced in the area of ineffective discharge caused due to the delay of closing of the intake valve. Since the pressure rising rate of the fuel in the pressurizing chamber 12 is sufficiently assured, the discharge valve can be opened rapidly and the ineffective discharge area itself can also be sufficiently shortened. Accordingly, the theoretical flow rate in an effective discharge area is increased after the discharge valve is opened, and the discharge flow rate is increased, particularly, the volume efficiency at the time of high speed can be increased. Since the start speed of the cam at the start of the discharge stroke is properly suppressed, the theoretical flow rate in the ineffective discharge area caused due to the delay of closing of the intake valve is decreased and then the theoretical flow rate in the effective discharge area is increased. As a result, the discharge flow rate is increased, and the volume efficiency particularly at the high speed can be increased.

6. 发明专利

JP2001115927A HIGH PRESSURE FUEL PUMP 失效
公开(公告)号：JP2001115927A
公开(公告)日：2001-04-27
申请号：JP29764699
申请日：1999-10-20
申请人： HITACHI LTD
发明人： HEIKO KENJI , NOGAMI TADAHIKO , TAKAO KUNIHIKO , YAMADA HIROYUKI , TOKUO KENICHIRO
IPC分类号： F02M59/46
摘要： PROBLEM TO BE SOLVED: To solve such a problem that a volumetric efficiency is remarkably reduced at high rotation and it is difficult to provide a large flow pump, in a single cylindrical plunger type high pressure fuel pump. SOLUTION: A maximum lift quantity Xmax of a valve is restricted so as to set an opening area A2 changed together with a lift quantity X of a delivery valve 6 to the same as or better than that of a passage area A1 of an upstream side (a pressurizing chamber side) of the delivery valve. Accordingly, it is possible to suppressed that reverse flow is generated from closing delay caused by lifting the valve more than necessary. As a result, a high volumetric efficiency is obtained from a low rotation region to a high rotation region.

7. 发明专利

JPH1150978A DISPLACEMENT FLUID MACHINE AND AIR CONDITIONER 失效
公开(公告)号：JPH1150978A
公开(公告)日：1999-02-23
申请号：JP20610697
申请日：1997-07-31
申请人： HITACHI LTD
发明人： TAKAO KUNIHIKO , KONO TAKESHI , KOSOKABE HIROKATSU , MACHIDA SHIGERU , TOJO KENJI , INABA KOICHI , OSHIMA KENICHI
IPC分类号： F04C18/02
摘要： PROBLEM TO BE SOLVED: To provide a displacement fluid machine having high reliability by decreasing the rotating moment to act on a displacer, resolving a problem of friction and abrasion, and reliably supplying oil to a bearing part and a sliding part. SOLUTION: A plurality of operating chambers are formed by turning a displacer in a hollow cylinder 4 whose sectional shape is constituted of a continuos curved line, four or five projecting part projecting toward the inside of the cylinder 4 are constituted, an oil supplying passage 41 communicated with a lubricating oil reservoir 12 is provided on a rotary shaft 6 for deriving the displacer, and a bearing oil supplying hole communicated with the oil supplying passage 41 and formed outward in the radial direction is installed.

8. 发明专利

JPH1150976A DISPLACEMENT TYPE FLUID MACHINE 失效
公开(公告)号：JPH1150976A
公开(公告)日：1999-02-23
申请号：JP20610797
申请日：1997-07-31
申请人： HITACHI LTD
发明人： KOSOKABE HIROKATSU , TAKAO KUNIHIKO , MITSUYA SHIYUNICHI , KONO TAKESHI , TAKEBAYASHI MASAHIRO , TAGAWA SHIGETARO , OSHIMA YASUHIRO , TOJO KENJI
IPC分类号： F04C18/02
摘要： PROBLEM TO BE SOLVED: To improve the sealing structure of an end plate provided with a sucking chamber and a discharging chamber in a displacement fluid machine in which one space is formed of a cylinder inner wall surface and a displacer outer wall surface when a displacer and a cylinder are arranged between the end plates and the cylinder center and the displacer center are matched to each other, and a plurality of spaces are formed when the positional relationship between the displacer and the cylinder is in the turning position. SOLUTION: A cylinder 4 is fixed between a main bearing 7 and a sub bearing 8 fixed in a sealing container 3, a displacer 5 is driven by a crank 6a of a rotary shaft 6, and operating gas to be introduced from a suction pipe 13 is compressed. An annular sucking chamber 7b formed on the main bearing 7b is separated from a gas chamber 3e through an intake port 7a formed on a seal plate 100, and the sucking chamber 7b facing the cylinder 4 and the displacer 5 is separated from the gas chamber 3e by the bottom wall 7e.

9. 发明专利

JPH1137065A DISPLACEMENT TYPE FLUID MACHINE 失效
公开(公告)号：JPH1137065A
公开(公告)日：1999-02-09
申请号：JP19591097
申请日：1997-07-22
申请人： HITACHI LTD
发明人： MACHIDA SHIGERU , KOSOKABE HIROKATSU , MITSUYA SHIYUNICHI , TAKAO KUNIHIKO , HATAKE HIROAKI , TAGAWA SHIGETARO , TOJO KENJI
IPC分类号： F04C18/02
摘要： PROBLEM TO BE SOLVED: To reduce fluid loss of suction gas by communicating a compressor suction port to a plurality of spaces through communicating holes provided on an end plate and suction flow passages provided in a cylinder. SOLUTION: Working gas entering a closed vessel 3 through a suction pipe 13, enters the suction port 13a in a suction cover 10 fitted to a main bearing member 7, enters a displacement type compression element 1 through suction communicating holes 7a, and hereat a displacer 5 performs turning motion by rotation of a rotary shaft 6, the gas is compressed by reducing the volume of a compression operating chamber. The compressed working gas passes through discharge ports 8a formed on the end plate 8b of a sub-bearing member 8, pushes up discharge valves 9 to enter a discharge chamber 8c, and is carried away outward through a discharge pipe 14. In this case, three compression operating chambers are formed, they discharge gas in the phases shifted by 120 degrees, hence the fluid can be compressed smoothly and continuously, and fluid loss in the discharge process can be reduced.

10. 发明专利

JPH10299674A SCROLL TYPE FLUID MACHINE 失效
公开(公告)号：JPH10299674A
公开(公告)日：1998-11-10
申请号：JP10940697
申请日：1997-04-25
申请人： HITACHI LTD
发明人： TAKAO KUNIHIKO , TAKEBAYASHI MASAHIRO , TOJO KENJI , SEKIGAMI KAZUO
IPC分类号： F04C18/02
摘要： PROBLEM TO BE SOLVED: To form a suction path less in pressure loss even at high driving speed without increasing the outside dimensions of a scroll. SOLUTION: A fluid machine is structured so that a compression mechanism part is formed by combining a first fixed scroll 4 to one side of a swing scroll 6 and a second fixed scroll 5 to the other side of it. A first suction path 4g is formed in a first fixed scroll end plate 4i and a second suction path 5g is formed in a second fixed scroll end plate 5i in the axial direction that they are interconnected to a suction pipe 9 arranged passing axially through a wall surface forming an axial end surface on the first fixed scroll 4 side of a cylindrical closed container 1 in which the compression mechanism part is incorporated their centers are aligned roughly with those of the flow lines of the suction pipe 9. Then the effective suction path area S2 of the second suction path 5g is formed so that it is roughly a half of the effective suction path area S1 of the first suction path 4g.

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