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1. 发明专利

JPH1030518A SOLENOID TYPE FUEL INJECTION VALVE 失效
公开(公告)号：JPH1030518A
公开(公告)日：1998-02-03
申请号：JP20097796
申请日：1996-07-12
申请人： ZEXEL CORP
发明人： FURUYA YUJI , INOUE AKIRA , IINO KENICHI
IPC分类号： F02M51/06
摘要： PROBLEM TO BE SOLVED: To provide a solenoid type fuel injection valve by which it becomes possible to prevent the resultant surging phenomenon even though the valve opening set force of a return spring is different, possible to decrease the controllable minimum spray quantity even though the responsiveness of a needle valve is enhanced and possible to expand dynamic adjusting range of a fuel injection quantity so as to aim at stabilization of the fuel injection characteristic and improvement in engine performance by preventing any irregular injection at the time of opening and closing of a needle valve. SOLUTION: Application of a fact that an unequally pitched coil spring can effectively damp a surging effect is used for this invention such that a return spring 21 for recovering a needle valve 10 to its seat position is made a multi-step unequal pitch spring and also its minimum contact load is made smaller than the lower limit value in an adjustment range of a valve opening set force caused by the return spring 21.

2. 发明专利

JPH0979106A SOLENOID FUEL INJECTION VALVE 失效
公开(公告)号：JPH0979106A
公开(公告)日：1997-03-25
申请号：JP25581395
申请日：1995-09-08
申请人： ZEXEL CORP
发明人： FURUYA YUJI , IINO KENICHI
IPC分类号： F02M51/06 , F02M51/08 , F02M61/10 , F02M61/20
摘要： PROBLEM TO BE SOLVED: To change a lift quantity of a valve body, and change a fuel injection rate without changing the other factor by a single solenoid fuel injection valve by arranging a simple pressure chamber (a fuel chamber) in a conventional solenoid fuel injection valve. SOLUTION: In the simplest method of changing a fuel injection rate, an armature lift restricting means is arranged to restrict a lift quantity of a valve body 22 or an armature 21 by using high pressure fuel by changing the passage area of an injection part, to put it concretely, by changing a valve lift quantity of a solenoid fuel injection valve. The armature lift restricting means having a slider member 18 is arranged to restrict a lift quantity of the armature 21 by reciprocating by a difference in the pressure receiving area of fuel pressure.

3. 发明专利

JPH09228922A ELECTROMAGNETIC FUEL INJECTION DEVICE 失效
公开(公告)号：JPH09228922A
公开(公告)日：1997-09-02
申请号：JP5820696
申请日：1996-02-22
申请人： ZEXEL CORP
发明人： INOUE AKIRA , FURUYA YUJI , IINO KENICHI
IPC分类号： F02M51/00 , F02M57/02
摘要： PROBLEM TO BE SOLVED: To eliminate a necessity of a high pressure pump, a high pressure regulator, and a high pressure pipe by providing a pressure generation mechanism having a piston which is in the interlocking relationship with an armature and a fuel injection mechanism which receives the supply of high pressure fuel from the pressure generation mechanism to jet the fuel. SOLUTION: A pressure generation mechanism 5 of an electromagnetic fuel injection device 1 forms a pressure generation chamber 14 which is communicated with a low pressure fuel inlet 10 and a high pressure fuel passage 7 through a check valve 13 in a housing 2 of the device and stores a piston 15 in the pressure generation chamber 14 in such a manner that it can reciprocate. An armature 20 can reciprocate in an armature chamber 21. Moreover, a fuel injection mechanism 8 attaches an automatic valve 27 to a tip of a nozzle body 4 by a retaining nut 26. Low pressure fuel in the pressure generation chamber 14 can be turned into high pressure fuel by moving a push rod 19 fixed on the armature 20 upward to push up the piston 15. Consequently, a high pressure pump becomes unnecessary.

4. 发明专利

JPH09133061A SPIRAL FUEL INJECTION VALVE 失效
公开(公告)号：JPH09133061A
公开(公告)日：1997-05-20
申请号：JP22734996
申请日：1996-08-12
申请人： ZEXEL CORP
发明人： FURUYA YUJI , IINO KENICHI , INOUE AKIRA
IPC分类号： F02M51/08 , F02M61/16 , F02M61/18 , F02M69/00
摘要： PROBLEM TO BE SOLVED: To change an injection characteristic and atomization characteristic even of a single spiral fuel injection valve in accordance with the operating conditions of an engine, to improve a combustion characteristic of the engine, so that fuel consumption and an exhaust characteristic can be improved, and to eliminate necessity for a big change in the conventional spiral fuel injection valve itself. SOLUTION: When a spiral fuel injection valve is used as the fuel injection valve and when a flow amount of fuel in a turn flow generating part of swirl flow forming slit 25 or the like is made variable, both an injection characteristic and an atomization angle can be changed, concretely, for instance, by additionally providing a simple fuel passage (bypass passage 26) communicating with a spiral chamber 24, both the injection characteristic and the atomization angle are made changeable, by aiming at this fact, and a flow amount variable means 28 variably generating a flow amount of fuel in the turn flow generating part (swirl flow forming slit 25) is provided.

5. 发明专利

JPH0849622A FUEL INJECTION VALVE 失效
公开(公告)号：JPH0849622A
公开(公告)日：1996-02-20
申请号：JP20277594
申请日：1994-08-04
申请人： ZEXEL CORP
发明人： FURUYA YUJI , IINO KENICHI , OKUYAMA SUSUMU
IPC分类号： F02M29/00 , F02M51/06 , F02M51/08 , F02M61/16 , F02M61/18
摘要： PURPOSE:To obtain a fuel injection valve capable of atomizing fuel to be injected, by injecting fuel after forming it in a swirl. CONSTITUTION:The flow area between a seat part 53c and a valve seat 32 and the flow area between the injection hole 33 side end of the valve seat 32 and a value body 5 in the maximum lifting of the valve body 5 are respectively set to A1, A2, and the flow area (sectional area) of the injection hole 33 is set to B, so that they may satisfy a formnal B>A2>A1.

6. 发明专利

JP2000046224A MANUFACTURE OF DISC TYPE SOLENOID VALVE 失效
公开(公告)号：JP2000046224A
公开(公告)日：2000-02-18
申请号：JP22656998
申请日：1998-07-28
申请人： ZEXEL CORP
发明人： IINO KENICHI , FURUYA YUJI
IPC分类号： F02M51/06 , F16K31/06 , H01F7/06
摘要： PROBLEM TO BE SOLVED: To ensure stability of magnetic properties (magnetic property and nonmagnetic property), to improve magnetic characteristics through reduction of a leakage magnetic flux, and to perform the increase of the attraction force of an electromagnetic coil, improvement of responsiveness, and the decrease of a manufacturing cost. SOLUTION: In a core part 21 formed of a magnetic substance, paying an attention to a fact that the core part is divided into a part (an inside magnetic substance part 22 and an outside magnetic substance part 23) effecting welding with a cover 4 and a part (an upper magnetic substance part 24) to be assembled, and after welding with the cover 4 is effected, heat treatment (solution treatment of the cover 4 and tempering of magnetic substances 22 and 23) is executed, and the core part 21 is divided into the inside magnetic substance part 22, the outside magnetic substance part 23, and the upper magnetic substance part 24. After the cover 4 formed of a nonmagnetic substance is assembled between the inside magnetic substance part 22 and the outside magnetic part 23 and welded to each other, heat treatment is applied.

7. 发明专利

JPH11200988A FUEL SUPPLY SYSTEM FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH11200988A
公开(公告)日：1999-07-27
申请号：JP1645098
申请日：1998-01-13
申请人： ZEXEL CORP
发明人： INOUE AKIRA , FURUYA YUJI , IINO KENICHI , AIHARA KOJI , SUZUKI EIJI , SUGAYA HIROKO
IPC分类号： F02D1/02 , F02M51/00 , F02M55/02
摘要： PROBLEM TO BE SOLVED: To avoid any infructuous work of a high pressure fuel pump at high- speed operation by installing a pressure sensor to detect pressure in a common rail, and a controller to control the opening or closing of a solenoid valve according to a detection signal out of this pressure sensor, respectively. SOLUTION: When fuel pressure in a common rail 7 exceeds the specified level by a fuel supply by a low-pressure fuel pump 3 and the drive of a high- pressure fuel pump 5 by an internal combustion engine 14, a solenoid valve 10 is opened free by a control signal to this solenoid valve 10 from a controller 9, and high pressure fuel from the high-pressure fuel pump 5 is returned to a fuel tank 2 from a low-pressure passage 19 via a branch point 16 at the downstream side, thereby unloading the high-pressure fuel pump 5. Since a one-way valve 6 is situated at the downstream side of this high-pressure fuel pump 5, this pump 5 itself comes into a state of being separated from a high pressure section in the common rail 7. With this, any possible infructuous work of the high-pressure fuel pump at high-speed operation is made avoidable in consequence.

8. 发明专利

JPH10274130A ACCUMULATOR FUEL INJECTION DEVICE 失效
公开(公告)号：JPH10274130A
公开(公告)日：1998-10-13
申请号：JP9511797
申请日：1997-03-28
申请人： ZEXEL CORP
发明人： FURUYA YUJI , IINO KENICHI
IPC分类号： F02M37/00 , F02D41/38 , F02M47/02 , F02M55/02
摘要： PROBLEM TO BE SOLVED: To provide an accumulator fuel injection device to generate high pressure fuel during the starting of an engine through simple constitution. SOLUTION: An accumulator fuel injection device is provided with a volume varying mechanism 10 having a volume chamber 29 communicated with a common rail 9 having an accumulation chamber 39. During the starting of an engine, fuel is fed to an accumulation chamber 39 from a pump and simultaneously, a plunger 23 is energized by working a coil spring 25 by a control means 27 to decrease the volume of the volume chamber 29. This constitution increases a fuel pressure in a pressure storage chamber 39. Thus, a high pressure in the accumulation chamber is generated during the starting of an engine. Besides, a fuel circuit is prevented from complication and constitution is simplified.

9. 发明专利

JPH1090157A METHOD AND APPARATUS FOR MEASURING SPRAY UTILIZING LASER DIFFRACTION 失效
公开(公告)号：JPH1090157A
公开(公告)日：1998-04-10
申请号：JP26924196
申请日：1996-09-19
申请人： ZEXEL CORP
发明人： FURUYA YUJI , INOUE AKIRA , IINO KENICHI
IPC分类号： G01N15/02
摘要： PROBLEM TO BE SOLVED: To highly accurately measure a high density spray utilizing a laser diffraction method and to properly evaluate not only spray information of each location but also an entire spray. SOLUTION: A pair of shielding members 16, 17 are oppositely provided to cover a laser light path with a predetermined spacing in a spray space where a spray is supplied, a laser beam 20 is shed to the spray passing between the shielding members, the laser beam which has passed through the spray is received by a photoelectric conversion element, and spray information in a space of a measured location is obtained based on an output from the photoelectric conversion element. The space of the measured location is traversed relatively to the spray space in the same or perpendicular direction to the laser beam with predetermined pitches to obtain spray information for each pitch. Information not only on each location of the spray but also the entire spray can be obtained free from influence of multiple scattering.

10. 发明专利

JPH0874699A FUEL INJECTION VALVE 失效
公开(公告)号：JPH0874699A
公开(公告)日：1996-03-19
申请号：JP24191694
申请日：1994-09-09
申请人： ZEXEL CORP
发明人： FURUYA YUJI , IINO KENICHI , OKUYAMA SUSUMU
IPC分类号： F02M51/06 , F02M61/16
摘要： PURPOSE: To prevent variation of the maximum lifting distance of a valve body secularly. CONSTITUTION: A step face 12c is formed inside the storing hole 12 of a valve main body 11. A shim 14 for adjusting the position of a valve seat member 13 is interposed between the step face 12c and the large diameter part 13b of the valve seat member 13. The valve seat member 13 is directly welded and fixed on the valve body 11.

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