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81. 发明专利

JP2006342730A EXHAUST PROCESSING SYSTEM OF INTERNAL COMBUSTION ENGINE 审中-公开
公开(公告)号：JP2006342730A
公开(公告)日：2006-12-21
申请号：JP2005169462
申请日：2005-06-09
申请人： DENSO CORP
发明人： OKAJIMA MASAHIRO
IPC分类号： F01N3/02
摘要： PROBLEM TO BE SOLVED: To realize a cohesive device capable of holding insulation with a simple constitution, without causing electric current leakage by a deposit of an exhaust particulate to an insulator part even in the presence of the exhaust particulate of the high concentration, in an exhaust processing system of an internal combustion engine using corona discharge. SOLUTION: A corona discharge electrode 2 and a conductive net 3 being a dust collecting electrode are oppositely arranged in an exhaust passage 11 of the cohesive device 1. The corona discharge electrode 2 has a discharge part 22 positioned in a substantially central part of the exhaust passage 11, a conductive part 21 introducing high voltage from an external power source to the discharge part 22, and the insulator part 23 holding the outer periphery of the conductive part 21. A Pt carrying part projecting in a ring shape is arranged on the outer periphery of the insulator part 23, and the insulation is held by removing the sticking exhaust particulate by the catalytic action of Pt included on at least its outside surface. COPYRIGHT: (C)2007,JPO&INPIT

82. 发明专利

JP2000303908A FUEL INJECTION VALVE 失效
公开(公告)号：JP2000303908A
公开(公告)日：2000-10-31
申请号：JP11237599
申请日：1999-04-20
申请人： DENSO CORP
发明人： OKAJIMA MASAHIRO
IPC分类号： F02M21/02
摘要： PROBLEM TO BE SOLVED: To provide a fuel injection valve to control a fuel injection amount with high precision even when a fuel injection amount is a small quantity. SOLUTION: In a state that a needle valve 20 seats a vale seat, an initial gap di between a fixed core 12 and a moving core 30, a distance between a spacer 14 and a stopper 23, namely a lift amount dl of a needle valve 20 are in a relation di>dl. Further, a formula of 165 μm

83. 发明专利

JPH1077892A ACCUMULATOR FUEL SYSTEM FOR VEHICLE 失效
公开(公告)号：JPH1077892A
公开(公告)日：1998-03-24
申请号：JP23334696
申请日：1996-09-03
申请人： DENSO CORP
发明人： KATO MASAAKI , FURUHASHI TSUTOMU , OKAJIMA MASAHIRO
IPC分类号： F02M37/00 , F02D41/22 , F02M47/00 , F02M47/02 , F02M55/02 , F02M63/00
摘要： PROBLEM TO BE SOLVED: To provide an accumulator type fuel system for an engine to perform running of an automobile based on the will of a driver when the actuator of a fuel feed system is failed in operation. SOLUTION: Fuel pumped up by a low pressure fuel feed pump 101 is brought into a high pressure by a high pressure fuel feed pump 104, a pressure is accumulated at a common rail 105 and pressure accumulated fuel is injected from an injector 106 to each cylinder of an engine. When at least one actuator selected from the high pressure fuel feed pump 104, an electromagnetic pressure regulator 112, or a pressure sensor 107 is failed in operation, an engine is controlled through control of the high pressure fuel feed pump 104 or an injector 106. Thus, The feed of fuel by the low pressure fuel feed pump 101 is ensured and running of an automobile is practicable through control of the discharge pressure of the high pressure fuel feed pump 104 or control of opening and closing by the injector 106.

84. 发明专利

JPH1054318A ACCUMULATOR TYPE FUEL SUPPLY DEVICE FOR ENGINE 失效
公开(公告)号：JPH1054318A
公开(公告)日：1998-02-24
申请号：JP21142996
申请日：1996-08-09
申请人： DENSO CORP
发明人： KATO MASAAKI , OKAJIMA MASAHIRO , FURUHASHI TSUTOMU
IPC分类号： F02M37/00 , F02D41/04 , F02M37/20 , F02M47/02 , F02M55/02 , F02M59/46
摘要： PROBLEM TO BE SOLVED: To early transfer a common-rail internal pressure to a desired reduced pressure, when an operating condition of an engine is placed in a pressure reduction required condition of the commonrail internal pressure. SOLUTION: An electromagnetic and mechanical high pressure regulator 10 is provided, which can reduce a fuel pressure of a fuel supply system supplying fuel to an injector 106 via a common-rail 105 from a high pressure fuel supply pump 104. When an operating condition of an engine is placed in a pressure reduction required condition of a common-rail internal pressure, by an input of an electric signal, the high pressure regulator 10 is placed electromagnetically in an opening condition, partly high pressure fuel in the common-rail is forcedly opened to a low pressure side, so as to early transfer the common- rail internal pressure to a desired reduced pressure.

85. 发明专利

JPH09324714A HIGH PRESSURE RELIEF VALVE AND HIGH PRESSURE FUEL INJECTION SYSTEM USING IT 失效
公开(公告)号：JPH09324714A
公开(公告)日：1997-12-16
申请号：JP14716796
申请日：1996-06-10
申请人： DENSO CORP
发明人： OKAJIMA MASAHIRO
IPC分类号： F02M37/00 , F02M59/46 , F16K17/04
摘要： PROBLEM TO BE SOLVED: To provide a high pressure relief valve for preventing the excessive increase of a fuel pressure. SOLUTION: A high pressure relief valve installed in the delivery pipe in a high pressure fuel injection room can reduce the pressure in the delivery pipe by the volume increase of a buffing room by a valve lift and further leak the surplus fuel in the buffing room to the fuel tank through a core outer peripheral clearance 28 by providing a housing 11, a body 12, a needle 13 contactable to a seat part 18, a core 14 which can be tightly stuck and slid, a compression coil spring 15 for energizing the needle 13 in a close direction and a buffing room 26 in the body 12 between the seat part 18 and the core 14. Therefore, the overshoot of the fuel pressure in the delivery pipe at the start time and the abnormal increase of the fuel pressure during an engine operation can be prevented. As this valve is assembled by taking in the basic constitution of an injector with a few change, its production cost can be reduced and its body can be minified and lightened.

86. 发明专利

JP2002309991A FUEL INJECTION DEVICE AND CONTROL METHOD FOR FUEL INJECTION VALVE 失效
公开(公告)号：JP2002309991A
公开(公告)日：2002-10-23
申请号：JP2001111071
申请日：2001-04-10
申请人： DENSO CORP
发明人： OKAJIMA MASAHIRO , OTA NOBUO
IPC分类号： F02M51/00 , F02D41/20 , F02D41/34 , F02D41/40 , F02M51/06 , F16K31/06
摘要： PROBLEM TO BE SOLVED: To provide a fuel injection device suppressing operation sound and seat wear in a fuel injection valve using two electromagnetic coils in the opening/closing operation of a valve element. SOLUTION: This fuel injection device is provided with the fuel injection valve 10 having the valve element 21 seated on and separated from a valve seat around a fuel injection hole, a movable core 22, a first fixed core 31, a second fixed core 41, a first electromagnetic coil 32 and a second electromagnetic coil 42; and an electronic control unit 80 for controlling the fuel injection valve by adjusting the power quantity to the first electromagnetic coil and second electromagnetic coil. The electronic control unit reduces the power quantity to the second electromagnetic coil before the seating of the valve element on the valve seat after the completion of power application to the first electromagnetic coil. As a result, by reducing the power quantity to the second electromagnetic coil, the operation sound and seat wear generated when the valve element is seated can be suppressed without lowering valve closing responsiveness.

87. 发明专利

JPH11270725A PRESSURE REGULATING VALVE 失效
公开(公告)号：JPH11270725A
公开(公告)日：1999-10-05
申请号：JP7183998
申请日：1998-03-20
申请人： DENSO CORP
发明人： FURUHASHI TSUTOMU , OKAJIMA MASAHIRO , SAKAI TATSUO
IPC分类号： F16K17/04
摘要： PROBLEM TO BE SOLVED: To provide a pressure regulating valve capable of providing a stable pressure regulating characteristic and reducing a pressure fluctuation and noise. SOLUTION: This pressure regulating valve 7 is constituted of a housing 14, valve body 15, valve member 20 and a compression coil spring 30. A pressure control part 21 is provided between an abutting part 20a of the valve member 20 and a valve seat 15a. A tapered angle in a tapered surface of the pressure control part 21 is set smaller than a tapered angle in a tapered surface of the abutting part 20a. When the abutting part 20a of the valve member 20 is separated from the valve seat 15a, a variation rate is smoothed in an opening area between the pressure control part 21 and the valve seat 15a, so that a stable pressure regulating characteristic can be obtained, and a variation rate in a flow amount of fuel can be mitigated. Accordingly, a pressure fluctuation in a low pressure fuel passage is reduced, and a noise generated from a fuel supply device can be reduced. By providing the abutting part 20a and the pressure control part 21 in a separate location of the valve member 20, a freedom degree of design of the valve member 20 can be enhanced.

88. 发明专利

JPH10311267A FUEL PRESSURE PULSATION DAMPING DEVICE 失效
公开(公告)号：JPH10311267A
公开(公告)日：1998-11-24
申请号：JP12113897
申请日：1997-05-12
申请人： DENSO CORP
发明人： OKAJIMA MASAHIRO , FURUHASHI TSUTOMU
IPC分类号： F02M37/00 , F02M55/00
摘要： PROBLEM TO BE SOLVED: To provide a fuel pressure pulsation damping device to damp both pressure pulsation due to a water hammer and pressure pulsation due to a flow rate. SOLUTION: By disposing a fuel pressure pulsation damping device body 10 between a low pressure piping 30 on the high pressure supply pump side and a low pressure piping 20 on the fuel pump side, both pressure pulsation due to a water hammer propagated from a high pressure supply pump to the fuel pump side and pressure pulsation due to a flow rate sucked from a low pressure piping side to a high pressure supply pump and forcibly returned from a high pressure supply pump to the low pressure piping side are damped. Thus, durability of a low pressure piping 20 on the fuel pump side, a fuel pump, and a member at the internal part of a fuel pump and a fuel filter is ensured. Further, since the fuel pressure pulsation damping device body 10 simply consists of a housing 100, a piston 1, a spring 2, and stoppers 3 and 4, high durability is ensured compared with a pulsation damper having a diaphragm made of rubber.

89. 发明专利

JPH10159668A HIGH PRESSURE SUPPLY PUMP 失效
公开(公告)号：JPH10159668A
公开(公告)日：1998-06-16
申请号：JP31987096
申请日：1996-11-29
申请人： DENSO CORP
发明人： OKAJIMA MASAHIRO
IPC分类号： F02M37/00 , F02M37/20 , F02M59/10
摘要： PROBLEM TO BE SOLVED: To provide a high pressure supply pump which can control the discharge amount of the fuel at a high accuracy by maintaining the pressure of the sucked fuel at a constant value, and can simplify the fuel feeding system. SOLUTION: The fuel fed from a low pressure pump is sucked from a suction passage 12a to a fuel pressure chamber 16, and the fuel in the fuel pressure chamber 16 is pressurized by the reciprocating movement of a plunger 43, and it is delivered from a delivery valve 30. In a pressure regulating valve 50, a valve member 51 is separated form a valve seat 53, when the fuel pressure in a fuel passage 54 communicating with the suction passage 12a is made at a specific pressure or higher, so as to regulate the pressure of the sucked fuel at a specified pressure. A vapor generated in a high pressure supply pump 10 in a high temperature restarting time of the engine is exhausted to the outside of the pump from the pressure regulating valve 50.

90. 发明专利

JPH1054319A ACCUMULATOR FUEL SUPPLY DEVICE FOR ENGINE 失效
公开(公告)号：JPH1054319A
公开(公告)日：1998-02-24
申请号：JP21143096
申请日：1996-08-09
申请人： DENSO CORP
发明人： KATO MASAAKI , OKAJIMA MASAHIRO , FURUHASHI TSUTOMU
IPC分类号： F02M37/00 , F02D41/06 , F02M37/08 , F02M37/20 , F02M55/00 , F02M55/02
摘要： PROBLEM TO BE SOLVED: To provide an accumulator fuel supply device formed so as to ensure a stable operating condition from the beginning when an engine is restarted at a high temperature. SOLUTION: When an estimation signal of high temperature restart is input before starting an engine, a low pressure fuel supply pump 101 is driven, also an electromagnetic pressure regulator 112 is forcedly valve opened. In this way, before starting the engine, air or fuel vapor in a high pressure fuel route is started to be removed, air bleed operation is executed. Accordingly, when the engine is started, air or fuel vapor in a common rail 105 is removed, since a fuel pressure in the common rail 105 is sufficiently at a high pressure, by proper timing in accordance with valve opening/closing operation of an injector 106, a proper amount of fuel can be injected by atomization.

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