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41. 发明专利

JPH11200985A PRESSURE ACCUMULATION TYPE FUEL INJECTION DEVICE 失效
公开(公告)号：JPH11200985A
公开(公告)日：1999-07-27
申请号：JP652098
申请日：1998-01-16
申请人： NIPPON SOKEN
发明人： TSUZUKI SACHIHIRO
IPC分类号： F02M47/00 , F02M51/00 , F02M51/06 , F02M63/00
摘要： PROBLEM TO BE SOLVED: To improve the responsiveness to valve closing of a pressure accumulation type fuel injection device for an internal combustion engine. SOLUTION: A control chamber 5 is formed in an upper end part of a command piston 4 connected to a needle valve, and high pressure fuel is supplied from a passage 16. When an armature 9 integrated with a valve member 7 of a solenoid valve B is attracted by a solenoid 8 and rises, pressure in the control chamber 5 is reduced, and the needle valve rises to inject fuel. The attraction of the armature 9 is released by the solenoid 8 and it is lowered down to a valve closing position together with the valve member 7 to stop the injection. A part of high pressure fuel in the control chamber 5 is supplied into an armature chamber 9 through a clearance around a guide part 73 to maintain pressure in the armature chamber 91 substantially at a constant pressure. Since a check valve having a fixed valve opening pressure is inserted between the armature chamber 91 and a drain passage 62, a jet of drain fuel does not flow into the armature chamber 91 to prevent bounce of the valve member 7 so that the responsiveness to valve closing is improved.

42. 发明专利

JPH11173245A NOZZLE WITH VARIABLE HOLE 失效
公开(公告)号：JPH11173245A
公开(公告)日：1999-06-29
申请号：JP34290197
申请日：1997-12-12
申请人： NIPPON SOKEN
发明人： TSUZUKI SACHIHIRO
IPC分类号： F02M61/10 , F02M61/18
摘要： PROBLEM TO BE SOLVED: To provide a nozzle with a variable hole obtainable of an assured sliding and seating on a seat even if machining is not performed very precisely. SOLUTION: Because a top needle 4 is formed on the end of a needle 2 separately from members composing a seat 3 and movably coupled with the seat 3, the needle 3 can stably make vertical sliding at two places, a needle guiding part and a top guiding party, even if the needle 2 of seat 3, the top guiding part 5 and the needle 2 guiding part are not machined very precisely. Besides, an assured sliding becomes possible at the same time which enables the seat 3 to be secured of its positive sealing.

43. 发明专利

JPH1150824A DRIVING DEVICE FOR SOLENOID VALVE 失效
公开(公告)号：JPH1150824A
公开(公告)日：1999-02-23
申请号：JP22435997
申请日：1997-08-05
申请人： NIPPON SOKEN
发明人： ARIKAWA FUMIAKI , TSUZUKI SACHIHIRO
IPC分类号： F01L9/04 , F16K31/06
摘要： PROBLEM TO BE SOLVED: To reduce the seating speed of a valve in an solenoid valve driving device to prevent generation of vibration and noises at the time of seating, and improve the durability of the valve. SOLUTION: Valve opening and closing solenoides 51 and 52 are provided on the lower and upper parts respectively of an armature 6 integrally operating with a valve 1, and the valve 1 is energized by closing and opening springs 21 and 22. Lower and upper chambers 71 and 72 are provided on the lower and upper parts of the armature 6 to enclose air G and viscous fluid L to form a drawing passage 61 for communicating both the chambers 71 and 72. For example when the valve is closed, the air G, having small viscous resistance, can flow in the drawing flow passage 61 at first, also the viscous fluid L, having large viscous resistance, can flow in the frawing flow passage 61 in nearby the stroke end of the armature 6, and the armature 6 can reduce its speed in only nearby the stroke end.

44. 发明专利

JPH10148110A VALVE DRIVING DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH10148110A
公开(公告)日：1998-06-02
申请号：JP30799796
申请日：1996-11-19
申请人： NIPPON SOKEN
发明人： ARIKAWA FUMIAKI , SHIBATA HITOSHI , TSUZUKI SACHIHIRO
IPC分类号： F01L9/04 , F16K31/06
摘要： PROBLEM TO BE SOLVED: To provide a valve driving device using a solenoid which can make a valve in a closed state when an engine is started. SOLUTION: A pressure pushing part 50 by which a valve opening side return spring 5a is pushed, and adjusted, is arranged at an end surface on a side opposite to of a side opposed to the first armature 4a of the valve opening side return spring 5a, therefore the pressure pushing part 50 is operated, thereby the valve opening side return spring 5a is pushed and pressed so that the first armature 4a can be moved to a valve opening electromagnetic 2b side. Therefore, a sufficient valve opening action can be obtained even though distance between the first armature 4a and the valve opening electromagnet 2b is separated, thus in the case that energization is not applied to either a valve closing electromagnet 2a or the valve opening electromagnet 2a and the pressure pushing part 50 is not operated, even though a valve 1 is closed and also the first armature 4a is brought into contact with the valve closing electromagnet 2a, a sufficient valve opening action can be obtained. Thus, the valve 1 can be closed when an engine is started.

45. 发明专利

JPH1047137A CONTROL METHOD FOR FUEL INJECTION TIMING OF INTERNAL COMBUSTION ENGINE AND ITS DEVICE 失效
公开(公告)号：JPH1047137A
公开(公告)日：1998-02-17
申请号：JP20611496
申请日：1996-08-05
申请人： NIPPON SOKEN
发明人： NONOYAMA YOSHIHARU , TSUZUKI SACHIHIRO
IPC分类号： F02B3/06 , F02D41/14 , F02D41/38 , F02D41/40 , F02M47/02 , F02M55/02 , F02M65/00
摘要： PROBLEM TO BE SOLVED: To control a fuel injection timing by measuring a valve opening timing in each cylinder without installing a lift sensor in each cylinder concerning a control method for a fuel injection time of an internal combustion engine and its device. SOLUTION: A timing toc when the pressure value of a pressure sensor provided on a common rail decreases after an injection from an injector is detected, and the propagation time δtt D of a pressure wave from an injection nozzle to the common rail is made to retroact to the timing toc to compute the start timing tos of actual fuel injection, and a difference between the start timing tos of actual fuel injection and the target value to of the injection start time is stored, and the target injection timing in the case of next injection is corrected by this stored value.

46. 发明专利

JPH109033A FUEL INJECTION DEVICE OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH109033A
公开(公告)日：1998-01-13
申请号：JP15820996
申请日：1996-06-19
申请人： NIPPON SOKEN
发明人： TSUZUKI SACHIHIRO , SAKAKIBARA YASUYUKI
IPC分类号： F02D41/04 , F02D41/00 , F02D41/24 , F02D41/34 , F02D41/36 , F02D41/40 , F02M47/02
摘要： PROBLEM TO BE SOLVED: To obtain an optimum fuel injection amount by correcting the variation of the injection property accurately regardless of the variation of the injection property of the cylinders, as to the fuel injection device of a multicylinder internal combustion engine. SOLUTION: A map as to the fuel injection amount Q and the fuel injection time τ of an injector is provided to each cylinder. The map memorizes the plural values of the common rail pressure. The fuel injection amount Q is calculated from the load and the rotational frequency of an internal combustion engine, and the injection time τ0 corresponding to the operated value Q0 of the fuel injection is calculated by a Q-τ map. By the pressure lowering of the common rail by the injection from the injector, the fuel injection amount is measured actually, and the correcting term of the map is calculated from the actually measured value. The Q-τ map of each cylinder is corrected by this correcting clause. The Q-τ map corrected at each cylinder is stored in a nonvolatile memory such as a flash memory.

47. 发明专利

JPH09177633A ACCUMULATOR FUEL INJECTION DEVICE 失效
公开(公告)号：JPH09177633A
公开(公告)日：1997-07-11
申请号：JP33955495
申请日：1995-12-26
申请人： NIPPON SOKEN
发明人： TSUZUKI SACHIHIRO
IPC分类号： F02M47/00 , F02M47/02 , F02M61/10 , F02M61/16
摘要： PROBLEM TO BE SOLVED: To lessen the quantity of leak out of clearances, and thereby make a pump small in size by lessening places in number, through which high pressure fuel is communicated with a drain via the clearances. SOLUTION: The accumulator fuel injection device is equipped with a common rail 2, a fuel injection valve, and with a valve 19 controlling the injection and suspension of the fuel injection valve, in which a balance rod is slidably fitted in a balance rod guide 230 in the valve 19, the lower end 231 of the balance rod guide is communicated with a control port 17 which is communicated with a back pressure chamber 13, through a communication passage 100, the upper end 232 of the balance rod guide is provided with a two way change-over valve 16 which is communicated with a drain port 220 so as to be released to atmosphere, and with a throttle part 14. In this place, a rod 9 housing a spring 10 energizing a needle 7 to the direction that a valve is closed, is provided for the back pressure chamber 13, and concurrently a width across flats is formed in the rod 9, so that the back pressure chamber 13 is thereby communicated with a needle chamber 12 just above the needle 7.

48. 发明专利

JPH09166062A PRESSURE ACCUMULATION TYPE FUEL INJECTOR 失效
公开(公告)号：JPH09166062A
公开(公告)日：1997-06-24
申请号：JP32574795
申请日：1995-12-14
申请人： NIPPON SOKEN
发明人： TSUZUKI SACHIHIRO
IPC分类号： F02M47/00 , F02M47/02 , F02M61/10
摘要： PROBLEM TO BE SOLVED: To improve delayed response to a boosting failure or a pressure change at the time of starting and to control the deterioration of exhaust emission. SOLUTION: When fuel is sent by pressure from an intermittent pressure feeding pump 5, first and second check valves 25 and 26 are opened so as to supply the fuel to a back pressure room 20 and an incorporated type pressure accumulation room 23 and a fuel injection hole 21 is sealed by a needle valve 15. When current is carried to a solenoid 38, since a valve 35 is opened the back pressure room 20 is communicated with a drain port 33, the needle valve 15 is raised and injection is started. When the carrying of current to the solenoid 38 is stopped, since the valve 35 shuts off the back pressure room 20 and the drain port 33, high pressure fuel is supplied from the pressure accumulation room 23 through an orifice 27 to the back pressure room 20, the needle valve 15 is lowered and the injection is stopped. Since it is only necessary to supply fuel to the pressure accumulation room incorporated in each of the fuel injection valves, delayed response to a boosting failure at the time of starting or a pressure change is improved.

49. 发明专利

JPH09126086A ACCUMULATOR FUEL INJECTION DEVICE 失效
公开(公告)号：JPH09126086A
公开(公告)日：1997-05-13
申请号：JP28585395
申请日：1995-11-02
申请人： NIPPON SOKEN
发明人： TSUZUKI SACHIHIRO
IPC分类号： F02M47/00 , F02M51/00
摘要： PROBLEM TO BE SOLVED: To perform reliable operation even when a valve lift is increased by a method wherein a permanent magnet is assembled to the valve of a two-way valve type hydraulic control valve, intercommunicating and disconnecting between a back pressure chamber and a drain port, in such a manner to be positioned facing a solenoid, and an electromagnetic force generated during energization of a solenoid is caused to repel to an electromagnetic force generated during energization of a solenoid and a valve is lifted. SOLUTION: High pressure fuel fed with a pressure from a fuel tank 100 by a fuel force feed pump 200 is accumulated in a reservoir 300, and fed to a fuel injection device 400 provided with a two-way valve type hydraulic control valve 600. In this case, high pressure fuel is introduced and accumulated in an oil reservoir 13 at the periphery of a needle valve 12 and simultaneously, introduced in a back pressure chamber 10 and a control port 11 through a throttle 14. In such a way that, during energization of a solenoid 22, a repulsion force is generated between a current generating electromagnetic force and a permanent magnet 23 assembled at a valve 16, a valve 16 is lifted upward and a valve seat part 18 is separated, and as a result of a needle valve 12 being pushed up, an injection nozzle 15 is released and high pressure fuel is injected.

50. 发明专利

JPH08296519A FUEL INJECTION VALVE 失效
公开(公告)号：JPH08296519A
公开(公告)日：1996-11-12
申请号：JP10415295
申请日：1995-04-27
申请人： NIPPON SOKEN
发明人： TSUZUKI SACHIHIRO
IPC分类号： F02M47/00
摘要： PURPOSE: To suppress drain flow-out amount from a high pressure source greatly during fuel injection. CONSTITUTION: When a needle valve 11 enters the fully lifted condition, a communicating groove provided in the central opening of a distance piece 10 acts as a second restriction section, and a first restriction section (clearance 17) and the second restriction section are arranged in series in a flow-out passage from an oil accumulation section 15 to a back pressure chamber 18. For this reason, high pressure fuel which flows in the back pressure chamber 18 receives restriction resistance of both restriction sections to reduce the flow-out amount. Consequently, it is possible to suppress the flow-out amount which is discharged into a drain 21.

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