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1. 发明专利

JPH11148327A SOLENOID VALVE DRIVE DEVICE 失效
公开(公告)号：JPH11148327A
公开(公告)日：1999-06-02
申请号：JP33095797
申请日：1997-11-13
申请人： NIPPON SOKEN , TOYOTA MOTOR CORP
发明人： TSUZUKI SACHIHIRO , ARIKAWA FUMIAKI , MATSUMOTO ISAO
IPC分类号： F01L9/04 , F02D41/20 , F16K31/06
摘要： PROBLEM TO BE SOLVED: To provide a solenoid valve drive which can freely control a valve speed and can shorten a time required for closing or opening the valve by increasing the valve speed or prevent vibrations or noises by decreasing the valve speed when the valve is seated on a valve seat. SOLUTION: This valve drive device is provided with a lower spring 21 urging a valve 1 in a valve-closing direction, an upper spring 22 urging the valve 1 in a valve-opening direction, and an armature 6 moved with the valve 1. The armature 6 has an upper solenoid 52 for closing the valve at one end and a lower solenoid 51 for opening the valve at the other end. The armature has a sub-coil 8 forming a magnetic field whose direction is equal to or opposite to the direction of the magnetic field generated by the solenoids 51, 52 and a control means 9 controls a current passing through the sub-coil 8. For example, when the valve 1 is closed, the current passed through the lower solenoid 51 is stopped and at the same time a current is passed through the sub-coil 8 to form a magnetic field in the direction opposite to the magnetic field produced by the lower solenoid 51, whereby residual magnetism is canceled and a repulsive force is generated to increase a valve speed. When the valve 1 is moved near to a valve closing position, a current is passed or stopped alternately, or the direction of current is changed. This decreases the valve speed and realizes a soft landing of valve.

2. 发明专利

JPH11159313A SOLENOID VALVE DRIVING DEVICE 失效
公开(公告)号：JPH11159313A
公开(公告)日：1999-06-15
申请号：JP34391597
申请日：1997-11-27
申请人： NIPPON SOKEN , TOYOTA MOTOR CORP
发明人： ARIKAWA FUMIAKI , TSUZUKI SACHIHIRO , YOTSUEDA KEIJI
IPC分类号： F01L3/24 , F01L9/04 , F02D41/20 , F16K31/06 , F16K37/00
摘要： PROBLEM TO BE SOLVED: To provide a solenoid valve driving device, capable of preventing vibration and noise when a valve is seated by reducing the seating speed and improving the durability of the valve. SOLUTION: A valve opening solenoid 61 and a valve closing solenoid 62 are provided under an armature 4 integrally operated with a valve 2 and above the armature 4, respectively. The valve 2 is energized from upward and downward by springs 51, 52. A period when an electrification control means 8 to control electrification of both solenoids 61, 62 turns the solenoid 62 on and off in the meantime from starting electrification of the valve closing solenoid 62 to seating the valve 2 during closing the valve is set, so that the valve 2 can be sufficiently decelerated in an off-period to smoothly seat the valve 2.

3. 发明专利

JPH06280711A FUEL INJECTION VALVE 失效
公开(公告)号：JPH06280711A
公开(公告)日：1994-10-04
申请号：JP8931793
申请日：1993-03-24
申请人： NIPPON SOKEN , TOYOTA MOTOR CORP
发明人： TSUZUKI SACHIHIRO , ITO TOSHIHIKO , SAKAKIBARA YASUYUKI , WATANABE KAZUHIDE , KATO TAKEHIKO , TOMOTA AKITOSHI
IPC分类号： F02M47/00 , F02M47/06 , F02M51/06 , F02M63/00 , H01L41/09 , H02N2/02
摘要： PURPOSE:To improve a fuel injection characteristic by preventing generation of secondary injection by a simple structure. CONSTITUTION:A device has an electrostrictive actuator 1 extended/contracted by electrification, piston member 2 advanced/reversed integrally with this actuator, pressure change chamber 31 sealed with operating fluid to be boosted at the time of advancing the piston member 2, back pressure chamber 61 communicating with the pressure change chamber 31 to have a diameter smaller than this pressure change chamber and a needle valve 5 with the base end appearing in the back pressure chamber 61 to advance in accordance with a pressure rise of the back pressure chamber 61 and to close a fuel injection valve 81. In the piston member 2, by protruding a lower surface center part at its advance time, a throttle flow path 21 is formed in series to a communication flow path 62 of connecting the pressure change chamber 31 and the back pressure chamber 61. Since circulating resistance is increased, transmitting a pressure pulsation from the back pressure chamber 61 to the pressure change chamber 31 is suppressed, and since the pressure pulsation is prevented from being amplified by the piston member 2, retracting the needle valve 5 is restricted.

4. 发明专利

JP2000055227A ELECTROMAGNETIC TYPE VALVE DRIVE DEVICE 失效
公开(公告)号：JP2000055227A
公开(公告)日：2000-02-22
申请号：JP22203598
申请日：1998-08-05
申请人： NIPPON SOKEN , TOYOTA MOTOR CORP
发明人： TSUZUKI SACHIHIRO , OSHIMA KENJI , MATSUMOTO ISAO
IPC分类号： F01L9/04 , F16K31/06
摘要： PROBLEM TO BE SOLVED: To sharply reduce friction, and inhibit the degradation of the easiness for assembling and adjusting. SOLUTION: This device is equipped with a lower spring 4, a push rod 13, and lower and upper solenoids 9 and 10, and the push rod 13 is pushed down, an upper spring 6 having a load same as that of the lower spring 4 is arranged in the lower part of the lower solenoid 9, and the upper part from an upper part retainer 24 is integrated with the insides of housings 5 and 11, thereby being adopted as a unit part 30. Consequently, friction can be sharply reduced, and an electromagnetic type valve drive device inhibiting the degradation of the easiness of assembling and adjusting can be provided.

5. 发明专利

JPH11153043A TWO-CYCLE DIESEL ENGINE 失效
公开(公告)号：JPH11153043A
公开(公告)日：1999-06-08
申请号：JP32127797
申请日：1997-11-21
申请人： NIPPON SOKEN , TOYOTA MOTOR CORP
发明人： SEKIGUCHI KIYONORI , MATSUOKA HIROSHIGE , TSUZUKI SACHIHIRO , SATO YASUO , YANAGIHARA HIROMICHI
IPC分类号： F02B33/34 , F02B3/06 , F02D13/02 , F02D41/02 , F02D43/00 , F02M51/06
摘要： PROBLEM TO BE SOLVED: To perform clean combustion by suppressing discharge of a nitrogen oxide and smoke as a necessary high output is ensured. SOLUTION: A fuel injection valve performs wide diffusion injection in a very short time, and this diesel engine comprises an intake valve and an exhaust valve; a valve timing varying mechanism to control the timing of the intake valve; and a mechanical supercharger. In a high load region (1/2 or more of a maximum fuel amount), by increasing a delay angle of a valve timing, a burned gas amount is increased. Meanwhile, a mechanical type supercharger is operated and a fresh air amount is increased. A mechanical supercharger and a valve timing variable mechanism are controlled so that the initial value, for example, λ=1, of a ratio of a burned gas amount to a fresh amount is obtained.

6. 发明专利

JP2001323859A HYDRAULIC CONTROL VALVE 失效
公开(公告)号：JP2001323859A
公开(公告)日：2001-11-22
申请号：JP2001101078
申请日：2001-03-30
申请人： NIPPON SOKEN
发明人： WATANABE KAZUHIDE , ITO TOSHIHIKO , SAKAKIBARA YASUYUKI , TSUZUKI SACHIHIRO
IPC分类号： F02M51/00 , F02M47/00 , F02M51/06 , F02M61/16 , F16K31/06
摘要： PROBLEM TO BE SOLVED: To provide a hydraulic control valve provided with an electrostrictive actuator capable of securely intermitting the oil pressure. SOLUTION: An outer valve 1 to be slid inside of a holder 12 is pushed by a spring 8 so as to close an outer valve seat 5. When the outer valve 1 is moved by an electrostrictive actuator 17 through a transformer chamber 23 and seated on an inner valve 2 since the high-pressure fuel from a high- pressure port 13 to a back pressure chamber 38 is cut and the pressure of the back pressure chamber 38 is lowered, a needle 27 is lifted so as to open an injection port 35. The low-pressure fuel collected to a drain port 16 can be flowed into the transformer chamber 23 through a clearance. A check valve 14 for maintaining the low-pressure fuel of the port 16 at the predetermined pressure is provided in the downstream of the drain port 16. With this structure, the transformer chamber 23 is maintained at the predetermined pressure, and the generation of bubble in the transformer chamber 23 can be prevented.

7. 发明专利

JP2000097124A HIGH PRESSURE FLUID INJECTION DEVICE 失效
公开(公告)号：JP2000097124A
公开(公告)日：2000-04-04
申请号：JP28198098
申请日：1998-09-17
申请人： NIPPON SOKEN , DENSO CORP
发明人： ITO YOSHIMICHI , TSUZUKI SACHIHIRO , ITO TOSHIHIKO , KOJIMA AKIKAZU
IPC分类号： F02M47/00
摘要： PROBLEM TO BE SOLVED: To simplify the structure of a conduit line, and to prevent that the fuel is continued to inject in the disorder condition of a two-way valve for injection control, in a high pressure fluid injection device. SOLUTION: A needle 12 to open and close an injection hole 101 for fuel injection purpose is controlled by increasing and decreasing the pressure of a control hydraulic chamber 106 generating its back pressure. The high pressure fuel leading-in to the control hydraulic chamber 106, and the release of the high pressure, are carried out by a single common use conduit line 21, by switching a two-way valve 42. Inside a tubular body 11 is made into a valve chest 103 and a cylinder 105, and a needle 12 is held slidable in the cylinder 105 to prevent the leakage of the fuel from the sliding part of the needle 12 to the other part, so as to make a drain conduit line unnecessary. The leading-in of the high pressure fuel to the valve chest 103 is carried out through a check valve 14, and the fuel leading-in to the valve chest 103 is prohibited as well as the inside of the valve chest 103 is maintained at a high pressure, so as to prevent the continuous injection of the fuel.

8. 发明专利

JP2000073916A ACCUMULATOR TYPE FUEL INJECTION SYSTEM 失效
公开(公告)号：JP2000073916A
公开(公告)日：2000-03-07
申请号：JP24023798
申请日：1998-08-26
申请人： NIPPON SOKEN , DENSO CORP
发明人： TSUZUKI SACHIHIRO , KOJIMA AKIKAZU
IPC分类号： F02M61/10 , F02M61/18
摘要： PROBLEM TO BE SOLVED: To reconcile obtaining fuel spray having proper atomization, and suppressing hydrocarbon(HC) exhaust quantity in an accumulator type fuel injection system. SOLUTION: A needle valve 3, sliding in a hollow nozzle body provided with nozzles 24 at the tip, has a guide part 30 as a spool valve formed at the tip for opening/closing the nozzles 24, and a seat part 20 as a poppet valve formed in series on the inlet side of the spool valve. The needle valve 3 is energized in a valve-opening direction by the pressure of high pressure fuel filled in the inside of a control chamber formed facing the rear end surface of the needle valve 3. The spool valve is in the closed condition until the poppet valve reaches a given lift quantity from the closed condition, and is turned into the opened condition when the poppet valve exceeds the given quantity, consequently resulting in the capacitation of the proper injection finish of fuel, the shortening of the shaft length of the needle valve 3, the improvement of injection responsiveness, and a narrowed null injection range.

9. 发明专利

JPH11210432A ELECTROMAGNETIC VALVE DRIVING DEVICE 失效
公开(公告)号：JPH11210432A
公开(公告)日：1999-08-03
申请号：JP2674098
申请日：1998-01-22
申请人： NIPPON SOKEN
发明人： ARIKAWA FUMIAKI , TSUZUKI SACHIHIRO
IPC分类号： F01L9/04
摘要： PROBLEM TO BE SOLVED: To provide an electromagnetic valve driving device capable of securely opening and closing a valve by increasing a attractive force without increasing a power consumption or the size of a solenoid. SOLUTION: An electromagnetic valve driving device comprises a lower spring for energizing a valve in valve closing direction, an upper spring for energizing the valve in valve opening direction, and an armature 6 moving integrally with the valve. A valve closing upper solenoid 52 is installed on the upper end surface side of the armature 6, and a valve opening lower solenoid is installed on the other end side of the armature 6. Both end surfaces of the armature 6 are formed in recessed and protruded-shapes in which a triangular-section annular mountain part 6a and valley part 6b are formed concentrically alternately, and the lower end surface of the upper solenoid 52 and the upper end surface of the lower solenoid opposed to each other are formed in recessed and protruded-shapes in which a triangular-section annular mountain part 5a and valley part 5b are formed concentrically alternately. In this case, the shortest distance between the armature 6 and the upper solenoid 52 or lower solenoid is a distance between the mountain part 6a and the valley part 5a, which is sorter than the axial distance. As a result, an attractive force generated is increased, and the armature 6 can be attracted securely.

10. 发明专利

JPH1113579A FUEL INJECTION VALVE 失效
公开(公告)号：JPH1113579A
公开(公告)日：1999-01-19
申请号：JP17253097
申请日：1997-06-27
申请人： NIPPON SOKEN
发明人： OKAMOTO ATSUYA , TSUZUKI SACHIHIRO
IPC分类号： F02M47/00
摘要： PROBLEM TO BE SOLVED: To shorten the closing time of a needle valve element, in an injection valve which is opened and closed by the controlled pressure of a control chamber where an inflow hole formed on one end side of a needle valve element is formed, by setting the cross-sectional area of the inflow hole based on a specific mathematical expression. SOLUTION: At the time of fuel injection, the high-pressure fuel in a control chamber is escaped to low pressure side, and when fuel injection is stopped, the pressure in the control chamber is raised to control opening and closing of a needle valve. In this fuel injection valve, the cross-sectional areas a1 and a2 of inflow and outflow holes are set based on a mathematical expression respectively. In the expression, C1 and C2 are the flow rate coefficient of the inflow and outflow holes respectively, ρis fuel density, Pc is the pressure led into the control chamber from a common rail, P0 is the pressure in the control chamber, hmax is the maximum displacement of a needle valve element, Aup is the sectional area where high-pressure fuel in the control chamber activates pressure on the needle valve element, treg is required valve- closing time, F is the springing force of a spring, and A1w is the cross-sectional area where high-pressure fuel in a fuel passage activates pressure on a needle, and As is the area of a seat part.

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