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41. 发明专利

JPH11200981A FUEL INJECTION VALVE AND DRIVING METHOD THEREFOR 失效
公开(公告)号：JPH11200981A
公开(公告)日：1999-07-27
申请号：JP255998
申请日：1998-01-08
申请人： NIPPON SOKEN
发明人： KATO TAKEHIKO , MATSUOKA HIROSHIGE , SEKIGUCHI KIYONORI
IPC分类号： F02D1/02 , F02D41/38 , F02M51/06 , H01L41/09
摘要： PROBLEM TO BE SOLVED: To provide a fuel injection valve which can control a fuel injection rate during one injection period and enables highly accurate control to make fuel injection at the optimum injection rate corresponding to engine conditions by constituting the injection valve which is opened by pressurizing a control pressure chamber. SOLUTION: A first downward pressure receiving face 130 formed with a difference in steps between a first guide shaft 30 and a second guide shaft 32 of a needle 20 is communicated or exposed to a control pressure chamber 14 of which pressure is changed in accordance with the displacement of an electrostrictive actuator, and a voltage applied on the electrostrictive actuator 1 is changed arbitrarily or at several stages during one injection period. Consequently, a fuel injection rate determined by a lift amount of the needle 20 can be controlled arbitrarily or at several stages during one injection period.

42. 发明专利

JPH11153068A PRESSURE ACCUMULATION TYPE FUEL INJECTION VALVE 失效
公开(公告)号：JPH11153068A
公开(公告)日：1999-06-08
申请号：JP32005197
申请日：1997-11-20
申请人： NIPPON SOKEN , TOYOTA MOTOR CORP
发明人： MATSUOKA HIROSHIGE , KATO NOBUYUKI , KATO TAKEHIKO , SATO YASUO
IPC分类号： F02M47/00 , F02M47/02 , F02M51/06 , F02M61/12 , F02M61/16
摘要： PROBLEM TO BE SOLVED: To shorten an injection time by increasing a flow rate of injecting fuel without increasing a demand pressure reducing amount of the pump chamber of a pressure accumulation type fuel injection valve for an internal combustion engine and increasing size. SOLUTION: A diameter of a push rod 1 is set to a value lower than that of the guide part 26 of a nozzle needle 9 or the sectional area of the push rod 1 is reduced to a value lower than that of the guide part 26, and set to a value higher than a difference between the sectional area of the guide part 26 and that of a sheet part 32. Since this constitution reduces a stroke volume of the push rod 1, a demand pressure reduction amount of a pump chamber 5 to hold the nozzle needle 9 in an opening state is decreased and the load of an actuator 4 is decreased. When the output of the actuator 4 is the same, a lift amount higher than that of the nozzle needle 9 is obtained and a sheet diameter is expanded, whereby an injection period is shortened through the increase of a flow rate of fuel. The nozzle needle 9 may be formed integrally with the push rod 1.

43. 发明专利

JPH10131826A FUEL INJECTION VALVE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH10131826A
公开(公告)日：1998-05-19
申请号：JP28517996
申请日：1996-10-28
申请人： NIPPON SOKEN
发明人： KATO TAKEHIKO , MATSUOKA HIROSHIGE
IPC分类号： F02M47/00 , F02M51/06 , F02M59/44 , F02M61/10
摘要： PROBLEM TO BE SOLVED: To provide a fuel injection valve which has high accuracy of responsiveness when closed, and by which combustion is improved by mounting the fuel injection valve on an intercylinder direct injection type gasoline engine or a diesel engine, requiring accuracy of fuel injection finishing time. SOLUTION: In a fuel injection valve in which a needle 2 is vertically moved in response to fuel pressure forcibly fed from a fuel forcibly feeding pump and control pressure increased and decreased by an actuator so that fuel injection from an injection hole 12 is started and finished, a pressure transmission groove 7 being symmetrical around the center shaft of the needle 2, is arranged on at least one of the top surface 4 of the needle 2 and the contact surface 5 of a control pressure chamber, which is brought into contact with the top surface 4. Fuel inflow from the pressure transmission groove 7 is also joined toward an interval between the top surface 4 of the needle 2 and the contact surface 5 of the control pressure chamber, and time that pressure change is transmitted to the whole top surface 4 of the needle 2 is shortened. Therefore, pressure change transmission time can be shortened, and the responsiveness of the operation of the needle 2 is improved against the change of the inner pressure of the control pressure chamber by the actuator.

44. 发明专利

JPH10103184A ACCUMULATOR TYPE FUEL INJECTION VALVE 失效
公开(公告)号：JPH10103184A
公开(公告)日：1998-04-21
申请号：JP25169796
申请日：1996-09-24
申请人： NIPPON SOKEN
发明人： MATSUOKA HIROSHIGE , KATO TAKEHIKO
IPC分类号： F02M47/00 , F02M47/02 , F02M51/06 , F02M63/00
摘要： PROBLEM TO BE SOLVED: To actuate a nozzle enlarging a diameter of a seat surface of a needle without enlarging a structure and increasing drive energy in an actuator, and attain shortening of a fuel injection period. SOLUTION: By leaving a pressure of a needle back pressure chamber 24 before operation of a pump chamber 5 as held lower than a pressure of an accumulator chamber 8, as compared with an injection valve in the past without setting the pressure of the needle back pressure chamber 24 with the pressure thereof equal to the pressure of the fuel accumulator chamber, by the amount corresponding to a difference between a pressure of a fuel inlet 19 and a preset pressure by a main back pressure setting part 3, a pressure adjusting amount of the needle back pressure chamber 24 can be made small, drive energy required for extending/contracting an actuator 4 can be decreased.

45. 发明专利

JPH0893591A ELECTROSTRICTION TYPE INJECTION VALVE AND ITS DRIVING METHOD 失效
公开(公告)号：JPH0893591A
公开(公告)日：1996-04-09
申请号：JP22804594
申请日：1994-09-22
申请人： NIPPON SOKEN
发明人： TSUZUKI SACHIHIRO , ITO TOSHIHIKO , SAKAKIBARA YASUYUKI , WATANABE KAZUHIDE , KATO TAKEHIKO
IPC分类号： F02M51/00 , F02M47/00 , F02M51/06
摘要： PURPOSE: To control the charge of excessive energy at the time of closing an electrostriction type injection valve, and to solve a problem accompanied by the charge of excessive energy. CONSTITUTION: When energy is gradually charged into an electrostrictive actuator 1 from a drive device 7 during the closing of an electrostriction type injection valve, and the inner pressure of a variable pressure chamber 31 therefore rises and attains valve closing pressure Pc, a needle valve 5 advances to close a fuel injection hole 81. In this process, pressure in the variable pressure chamber is monitored by a pressure sensor 101 or a load sensor, and when sensor output attains Pc, the charge of energy from the drive device is stopped. Since the energy more than that at the time of closing the injection valve is required for starting the injection, the energy is gradually charged in and filled up at speed being slow so as not to cause energy loss until next valve opening.

46. 发明专利

JPH06137232A FUEL PRESSURE CONTROL DEVICE 失效
公开(公告)号：JPH06137232A
公开(公告)日：1994-05-17
申请号：JP31122692
申请日：1992-10-27
申请人： NIPPON SOKEN
发明人： KATO TAKEHIKO , ITO TOSHIHIKO , SAKAKIBARA YASUYUKI , WATANABE KAZUHIDE , TSUZUKI SACHIHIRO
IPC分类号： F02M59/26
摘要： PURPOSE:To prevent the waste of power by providing in parallel a nonreturn valve whose valve opening pressure is set lower than the valve opening pressure and higher than the valve closing pressure of a pressure control valve and a reset valve opened when the force feed of a force-feed pump is completed, in a drain passage. CONSTITUTION:An eccentric cam 42 is rotated to increase the pressure in a plunger chamber 85 with rising of a plunger 1. When the fuel pressure exceeds the pressure in a pressure accumulating chamber 52 by 0.1MPa, a nonreturn valve 51 is opened to supply fuel to the pressure accumulating chamber 52. When the fuel pressure reaches a preset pressure 20MPa, a pressure control valve 2 is opened, but the plunger 1 is in the process of force-feed so that a passage 411 of a reset valve 41 is closed. Accordingly, fuel which flows out of a drain port 81 is returned to a tank 7 through a nonreturn valve 3 in a passage 822. Thus, the pressure in a drain chamber 83 is kept to the valve opening pressure 1.5MPa of the nonreturn valve. The pressure is higher than the valve closing pressure 1MPa of the control valve 2, so that the control valve 2 is not closed. Accordingly, as the fuel pressure keeps 11.5MPa equal to the pressure in the drain chamber 83, the pump power is not wasted.

47. 发明专利

JP2010084755A Fuel jet nozzle 审中-公开
标题翻译：燃油喷嘴
公开(公告)号：JP2010084755A
公开(公告)日：2010-04-15
申请号：JP2009077460
申请日：2009-03-26
申请人： Nippon Soken Inc , 株式会社日本自動車部品総合研究所
发明人： KATO TAKEHIKO , NISHIWAKI TOYOJI , SUZUKI TAKASHI , SAITO TORU
IPC分类号： F02M61/18
摘要： PROBLEM TO BE SOLVED: To provide a fuel jet nozzle which attains atomization of a jetted fuel by enhancing split force of the fuel jetted from a slit jet hole.
SOLUTION: A plurality of grooves 22 for generating a disordered flow of the fuel passing through the slit jet hole 6 are formed on the inner wall of the slit jet hole 6 of the fuel jet nozzle. The split force of the fuel jetted from an outlet of the jet hole outlet can be enhanced by generating the disordered flow of the fuel passing through the slit jet hole 6 with the plurality of grooves 22. Concretely, the disordered flow of the fuel is actively generated in a direction orthogonal to the advancing direction of the fuel against the flow of the fuel passing through the slit jet hole 6 by using a level difference at a groove starting edge, split force of the fuel jetted from the outlet of the jet hole can be enhanced by giving four directional components to a vector component of the fuel flowing inside the slit jet hole 6, and the atomization of the jetted fuel can be accelerated.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种燃料喷嘴，其通过增加从狭缝喷射孔喷射的燃料的分流力来实现喷射燃料的雾化。解决方案：在燃料喷嘴的狭缝喷射孔6的内壁上形成有用于产生通过狭缝喷射孔6的燃料的无序流动的多个凹槽22。可以通过产生穿过狭缝喷射孔6的多个槽22的燃料的无序流动来增强从喷射出口出口喷射的燃料的分离力。具体地，燃料的无序流动是积极的相对于通过狭缝喷射孔6的燃料的流动，通过使用槽起始边缘处的高度差，在与燃料的前进方向正交的方向上产生的燃料的流动，从喷射孔的出口喷射的燃料的分离力通过向在狭缝喷射孔6内流动的燃料的矢量分量赋予四个方向分量来增强，并且可以加速喷射的燃料的雾化。版权所有（C）2010，JPO＆INPIT

48. 发明专利

JP2002231414A SPARK PLUG FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2002231414A
公开(公告)日：2002-08-16
申请号：JP2001027847
申请日：2001-02-05
申请人： NIPPON SOKEN , TOYOTA MOTOR CORP
发明人： NAKAJIMA TATSUSHI , SAITO KIMITAKA , KATO TAKEHIKO , ABE SHIZUO
IPC分类号： F02P13/00 , H01T13/14 , H01T13/20 , H01T13/46 , H01T13/52
摘要： PROBLEM TO BE SOLVED: To reconcile ignitability and durability by maintaining the excellent ignitability even at discharge time to either earth electrode, and aerially discharging to the first earth electrode without blowing away a discharge spark by a gas flow in a spark plug having the first and second earth electrodes for ordinary time and carbon fouling time. SOLUTION: An insulating insulator 3 for holding the outer periphery of a central electrode 4 is supported in a cylindrical installing metal fitting 2 in a state of exposing a tip part. The the installing metal fitting 2 is provided with the first earth electrode 5 for forming a first discharge gap A between the electrode and a tip surface of the central electrode 4, and the second earth electrodes 6 and 7 for forming a second discharge gap B between the electrodes and a small diameter part 3c of the insulating insulator 3. When a shaft directional distance between a lower end surface of the insulating insulator 3 and a lower end surface of the installing metal fitting 2 is C, a shaft directional distance between the lower end surface of the insulating insulator 3 and the lower end edge of the second earth electrodes 6 and 7 is D, and a shaft directional distance between the lower edge of the second earth electrodes 6 and 7 and the lower end surface of the installing metal fitting 2 is E, the distances C, D and E are set so as to satisfy 1 mm

49. 发明专利

JPH11193763A FUEL INJECTION VALVE OF INTERNAL COMBUSTION ENGINE AND METHOD FOR DRIVING THE SAME 失效
公开(公告)号：JPH11193763A
公开(公告)日：1999-07-21
申请号：JP36082997
申请日：1997-12-26
申请人： NIPPON SOKEN
发明人： KATO TAKEHIKO , MATSUOKA HIROSHIGE , SEKIGUCHI KIYONORI
IPC分类号： F02M51/06 , F02M61/10
摘要： PROBLEM TO BE SOLVED: To make the injection rate variable in one fuel injection cycle by freely controlling the lift of the needle of the fuel injection valve of an internal combustion engine. SOLUTION: A needle 10 having a differential pressure boundary plate 30 that separates into upper portion and lower portion of a differential pressure chamber 31 that communicates with two accumulators 80, 81 moves up and down to compensate each change in the capacity between those accumulators 80, 81 of the upper and lower portions of the piston caused by the movement thereof along with sliding movement of the electrostrictive actuator 60. The voltage applied to the electrostrictive actuator 60 is gradually controlled such that the lift of the needle 10 can be freely changed.

50. 发明专利

JPH10176631A FUEL INJECTION VALVE 失效
公开(公告)号：JPH10176631A
公开(公告)日：1998-06-30
申请号：JP33790696
申请日：1996-12-18
申请人： NIPPON SOKEN
发明人： KATO TAKEHIKO , MATSUOKA HIROSHIGE
IPC分类号： F02M61/10 , F02M61/16 , F02M61/18
摘要： PROBLEM TO BE SOLVED: To provide a fuel injection valve which leads swirl flows generated by its upstream swirl grooves to its nozzle hole without weakening them for a wider spray angle. SOLUTION: A fuel injection valve comprising a needle 13 formed with spiral swirl grooves 8 involves a tapered sack part 6 with a tapered center axis 11 inclined to a nozzle hole axis 9, and a curved surface part 12 which slopingly extends between the wall of the sack part 6 and the wall of a nozzle hole 7 at the circumference of a nozzle hole entrance 19 opening from the nozzle hole 7 onto the sack part 6. When a swirl flow of fuel generated by the spiral swirl grooves 8 with a nozzle center axis 5 being the center reaches the tapered sack part 6 and then flows into the nozzle hole 7, the curved surface part 12 serves to suppress a loss and turbulence in the flow to thereby keep the swirl flow of fuel not disturbed until it enters the nozzle hole 7.

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