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21. 发明专利

DE3525408C2 未知
公开(公告)号：DE3525408C2
公开(公告)日：1996-08-01
申请号：DE3525408
申请日：1985-07-16
申请人： NIPPON SOKEN
发明人： IGASHIRA TOSHIHIKO , SAKAKIBARA YASUYUKI , ABE SEIKO , SEKIGUCHI KIYONORI , IZAWA AKIHIRO , KAWAI HISASI
IPC分类号： F02B3/06 , F02D41/20 , F02D41/40 , F02M41/12 , F02M45/06 , F02M55/02 , F02M59/44 , H01L41/04 , F02M51/04 , F02D41/38
摘要： An electrostrictive actuator which can be used, e.g., in a distributor type fuel injection device of a diesel engine has an electrostrictive actuator for generating an electric charge upon reception of a load and an electric circuit unit connected to the electrostrictive actuator. The electric circuit unit has an electric charge changing means for changing the electric charge of the electrostrictive actuator in the state of generation of electric charge due to a load exerted on the electrostrictive actuator and thereby constricting the electrostrictive actuator, and an electrical charging means for charging the electrostrictive actuator in the state of constriction due to the operation of the electric charge changing means when the load exerted on the electrostrictive actuator is reduced and thereby extending the electrostrictive actuator.

22. 发明专利

DE3414378C2 未知
公开(公告)号：DE3414378C2
公开(公告)日：1996-08-01
申请号：DE3414378
申请日：1984-04-16
申请人： NIPPON SOKEN
发明人： IGASHIRA TOSHIHIKO , TANAKA TARO , SAKAKIBARA YASUYUKI
IPC分类号： F02B1/04 , F02B3/06 , F02D41/20 , F02D41/40 , F02M47/06 , F02M51/04 , F02M57/02 , F02M63/00 , H01L41/04 , H02P6/12 , F02M51/06
摘要： A fuel injection apparatus for an internal combustion engine comprising: a nozzle body; a nozzle formed at the bottom of the nozzle body; an electroexpansive actuator having the electroexpansive effect; a valve member, slideably mounted within the nozzle body; and a fuel chamber formed between the electroexpansive actuator and the valve member. When the electroexpansive actuator expands to reduce the volume of the fuel chamber, the valve member is moved in the closed direction of the nozzle. When the electroexpansive actuator contracts to increase the volume of the fuel chamber, the valve member is moved in the open direction of the nozzle.

23. 发明专利

DE19602474A1 Fuel-injection timing point control system for fuel injection pump in diesel engine 未知
公开(公告)号：DE19602474A1
公开(公告)日：1996-07-25
申请号：DE19602474
申请日：1996-01-24
申请人： NIPPON SOKEN
发明人： ENOMOTO SHIGEIKU , SAKAKIBARA YASUYUKI , GOTOH MORIYASU
IPC分类号： F02B3/06 , F02D1/18 , F02M41/12 , F16K31/06 , F02M59/46 , F02M37/22
摘要： The adjustment of the injection time point depends on the pressure difference between the high-pressure (HP) and low-pressure (LP) chambers (22,24). An oil pressure regulating valve alters a fuel pressure in at least one of the two chambers. The valve has a valve body (40), a valve cylinder (44) and a valve seat (37), having first and second truncated conical sections. A valve needle (43) is moved in the cylinder by a control unit. A unit introduces a fuel pressure applied to the valve needle at one of the end sections, in order to balance the pressure at the opposing end section. The first and second truncated conical surfaces when engaged together, form a circular sealing line, at which the conical surfaces butt. This sealing line has a dia. (d1,d6), which is essentially the same as the dia. (d1) of the valve needle.

24. 发明专利

FR2589523A1 未知
公开(公告)号：FR2589523A1
公开(公告)日：1987-05-07
申请号：FR8613761
申请日：1986-10-02
申请人： NIPPON SOKEN
发明人： IGASHIRA TOSHIHIKO , TANAKA TAROU , SAKAKIBARA YASUYUKI , TAKEUCHI YASUHIRO , WATANABE KAZUHIDE , MURATE NOBUYUKI , TAKIGAWA MASAHIRO
IPC分类号： F02M51/06 , F02D41/20 , F02D41/24 , F02D41/40 , F02M45/06 , F02M47/02 , F02M51/04 , F02M63/00 , F02M63/04 , F16K21/12 , H02N2/02 , F02D41/30
摘要： A piezoelectric flow control valve comprising a slidable closure member (22) for controlling a flow of fluid through a fluid passage (42) between a fluid inlet (40) and a fluid outlet (32). The closure member (22) is biased toward a normally closed position by a plunger (70) responsive to a hydraulic pressure in a pressure chamber (78) which is in fluid communication with the fluid inlet (40) through a restriction and with a pumping chamber (96) of a piezoelectric pump (72). In order to prevent fluid leakage under situations wherein the fluid pressure at the fluid inlet (40) is not high enough to ensure closure of the member (22), the present invention provides spring biased pressure mechanism (106) for biasing the closure member (22) toward the normally closed position and override means (130) for overriding the pressure mechanism (106) in response to a predetermined pressure at the fluid inlet (40).

25. 发明专利

DE102004026250B4 Ansteuerschaltung für Piezoaktoren 未知
公开(公告)号：DE102004026250B4
公开(公告)日：2010-07-15
申请号：DE102004026250
申请日：2004-05-28
申请人： DENSO CORP , NIPPON SOKEN
发明人： FUKAGAWA YASUHIRO , SAKAKIBARA YASUYUKI , MORITUGU MITIYASU , TAKEMOTO EIJI
IPC分类号： F02M51/00 , H02N2/06 , F02D41/20 , F02D41/38 , H01L41/04 , H01L41/09

26. 发明专利

DE19602474B4 未知
公开(公告)号：DE19602474B4
公开(公告)日：2009-07-09
申请号：DE19602474
申请日：1996-01-24
申请人： NIPPON SOKEN
发明人： ENOMOTO SHIGEIKU , SAKAKIBARA YASUYUKI , GOTOH MORIYASU
IPC分类号： F02D1/18 , F02B3/06 , F02D1/02 , F02D41/14 , F02M37/22 , F02M41/12 , F02M59/46 , F16K31/06
摘要： An injection timing control device for a fuel injection pump includes an oil-pressure control valve for controllably changing the fuel injection timing of the fuel injection pump. The oil-pressure control valve includes a valve cylinder having a valve seat. The valve seat has a first truncated-conical surface. The oil-pressure control valve further includes a valve needle slidably received in the valve cylinder and movable by a control unit. The valve needle has a second truncated-conical surface for engaging with the first truncated-conical surface to close the oil-pressure control valve and disengaging from the first truncated-conical surface to open the oil-pressure control valve. The first and second truncated-conical surfaces, when engaged, form a circular seal line on which the first and second truncated-conical surfaces abut each other. The circular seal line has a diameter which is substantially the same as a diameter of the valve needle. In the oil-pressure control valve, a fuel pressure applied to the valve needle at one axial end thereof is introduced to an opposite axial end thereof for equalizing fuel pressures applied to the valve needle at the opposite ends thereof.

27. 发明专利

DE10151421A1 The piezo operating element drive circuit for fuel injection unit of motor vehicle, has piezo stack and control circuit which adjusts on period of switching system 未知
公开(公告)号：DE10151421A1
公开(公告)日：2002-05-29
申请号：DE10151421
申请日：2001-10-18
申请人： NIPPON SOKEN , DENSO CORP
发明人： FUKAGAWA YASUHIRO , MORITSUGU MICHIYASU , SAKAKIBARA YASUYUKI , IGASHIRA TOSHIHIKO , NARUSE HIDEO
IPC分类号： F02D41/20 , F02D41/38 , F02M47/02 , F02M63/00 , F16K31/00 , H01L41/04 , H02N2/06 , H02N2/02 , F02M51/00 , F16K31/02
摘要： The piezo opening element drive circuit (1) is provided with a first conducting path (12a), to supply a first charging current from a DC voltage supply (11) to a piezo stack (2A-2D), at a piezo operating element (4c), to allow flow over an inductance (13). A second conducting path (12b) with the inductance (13), the piezo stack (2A-2D) and a diode are connected with each other in series. The switching system (14,15,16) is provided at a place on the first conducting path (12a) and is switched on and off repeatably. The control unit (18) controls the switching off and on. A first charging current flows and gradually increases during an ON period of the switching system (14,15,16). A second charging current flowing through the second conducting path (12b) based on a free running effect, reduces gradually during an OFF period of the switching system (14,15,16). In addition the control unit (18) adjusts the ON period of the switching system (14,15,16) to a predetermined time of duration.

28. 发明专利

DE19726100A1 Fuel injection device for IC engine 未知
公开(公告)号：DE19726100A1
公开(公告)日：1998-01-08
申请号：DE19726100
申请日：1997-06-19
申请人： NIPPON SOKEN
发明人： TSUZUKI YOSHIHIRO , SAKAKIBARA YASUYUKI
IPC分类号： F02D41/04 , F02D41/00 , F02D41/24 , F02D41/34 , F02D41/36 , F02D41/40 , F02M47/02
摘要： The multi-cylinder IC engine has injectors (12) on each cylinder fed from a common pressurised fuel line (16) and with the injection controlled by a processor (24). This computes the required amounts of fuel in each cycle for each cylinder. The pressure in the fuel supply to each injector is monitored and enable the processor to calculate the actual amounts of fuel injected in each cycle. The processor generates correction signals to adjust the injection control signals accordingly. The correction signals are stored in a memory and are updated to ensure an accurate fuel dosing control. The processor memory holds a set of injection characteristics which relates fuel injection amounts with injection time for different pressures.

29. 发明专利

DE69030385T2 未知
公开(公告)号：DE69030385T2
公开(公告)日：1997-07-17
申请号：DE69030385
申请日：1990-10-05
申请人： NIPPON DENSO CO , NIPPON SOKEN , TOYOTA MOTOR CO LTD
发明人： IZAWA AKIHIRO , SAKAKIBARA YASUYUKI , ABE SEIKO , ENOMOTO SHIGEIKU , YANAGIHARA HIROMICHI , HENDA YOSHIMITSU , MATSUMURA TOSHIMI , SHIBATA MASAMICHI
IPC分类号： F02D1/02 , F02D41/20 , F02D41/38 , F02D41/40 , F02M41/12 , F02M45/06

30. 发明专利

DE19648482A1 未知
公开(公告)号：DE19648482A1
公开(公告)日：1997-05-28
申请号：DE19648482
申请日：1996-11-22
申请人： DENSO CORP , NIPPON SOKEN
发明人： ENOMOTO SHIGEIKU , SAKAKIBARA YASUYUKI
IPC分类号： F02M25/07 , F16K31/128
摘要： At the downstream side of the intake throttle valve 30 of the intake pipe is provided a valve seat 32 serving as the end of the exhaust gas recirculation passage 27. Tile valve element 29 of the EGR valve opens and closes the valve seat 32. The valve element 29 is driven by the balance between the force due to the differential pressure between the negative pressure chamber 42 and atmospheric pressure chamber 43 acting on the diaphragm 39 and the biasing force of the spring 62. Tile pressure of the negative pressure chamber 42 is controlled by a servo valve 46 which consists of a valve element 46a in a cylindrical member 45. That is, when the valve element 46a of the servo valve 46 is displaced in the vertical direction through a screw transmission device by the stepping motor 53, the pressure in the negative pressure chamber 42 changes and the diaphragm 39 displaces. The cylindrical member 45 integral with this follows the valve element 46a and moves until the balance is restored. The EGR valve can be driven by an inexpensive, compact stepping motor, which has a large size and large allowable flow rate, and has a high precision of opening and response to control.

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