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11. 发明专利

JPH04132874A FUEL FILTER FOR UNIT INJECTOR 失效
公开(公告)号：JPH04132874A
公开(公告)日：1992-05-07
申请号：JP25621390
申请日：1990-09-25
申请人： NIPPON DENSO CO
发明人： OMORI TOSHIHIKO , NISHIMAKI HIROAKI , DAIKU TAKEHIKO
IPC分类号： F02M37/22 , F02M57/02
摘要： PURPOSE:To reduce the manufacturing cost and to reduce the size by forming a plurality of holes in the bottom part of a casing in the shape of a cylinder with a bottom having an open one end, inserting a filter member in the casing, and caulking the filter member by means of the open end of the casing. CONSTITUTION:A fuel filter 30 has a plurality of holes 32 formed in a bottom part 31a of a casing 31 in the shape of a cylinder with a bottom having an open one end, a plurality of filter members 33, 34, and 35 are inserted in the casing 31, and an open end 31b of the casing 31 holds the filter members 33, 34, and 35 by caulks 36. In the fuel filter 30 thus constituted, a bottom part 31a of the casing 31 is mounted in a hole 28a, formed in a holder 28 of a unit injector 20, by caulking in state that the bottom part 31a of the casing 31 is positioned facing the engine head side. A communicating hole 28b coaxial with the hole 28a for intercommunicating the engine head side and the unit injector 20 side is formed in the holder 28. When fuel flows from the engine head side to the unit injector 20 side, the filter 30 filtrates refuse present on the engine head side.

12. 发明专利

JPS63173842A FUEL INJECTION DEVICE 失效
公开(公告)号：JPS63173842A
公开(公告)日：1988-07-18
申请号：JP345887
申请日：1987-01-09
申请人： NIPPON DENSO CO
发明人： OMORI TOSHIHIKO , TOMIJIMA HITOSHI , NISHIMAKI HIROAKI , KANAMORI HIROYASU
IPC分类号： F02M57/02
摘要： PURPOSE:To effect high-speed operation in a control device for opening and closing a back pressure passage in a unit injector and thereby controlling an injection timing and an injection quantity, by providing a pressure receiving portion of a main valve of the control device and a control valve for controlling the pressure in a back pressure chamber of the main valve. CONSTITUTION:A unit injector includes a control device 23 integrally formed with a pressure cylinder for opening and closing a discharge passage 45 opened at its one end to a pressure chamber and thereby controlling an injection timing and an injection quantity. The control device 23 comprises a main valve 30 adapted to receive the pressure in the discharge passage 45 as a valve opening pressure, a back pressure chamber 52 for maintaining a valve closing pressure of the valve 30 and a control valve 24 for controlling the pressure in the back pressure chamber 52. A pressure receiving area of the main valve 30 under the closed condition on the back pressure chamber 52 side is set to be greater than that on the discharge passage 45 side, and a pressure receiving area of a valve member 31 of the control valve 24 under the closed condition on a fluid chamber 317 side is set to be greater than that on the back pressure chamber 52 side.

13. 发明专利

JPS6321359A ACCUMULATE TYPE PILOT INJECTION DEVICE FOR FUEL INJECTION PUMP 失效
公开(公告)号：JPS6321359A
公开(公告)日：1988-01-28
申请号：JP16611986
申请日：1986-07-15
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： NISHIMAKI HIROAKI , YAMADA YASUO , KATO MASAAKI , KAWAGOE MICHIO , SATO TAKESHI
IPC分类号： F02M45/06 , F02M41/12
摘要： PURPOSE:To obtain a pilot injection device with less variation due to aging effect by forming a projecting part on an accumulate piston and making said projecting part project out into a small hole while creating a throttle passage when said piston is seated on a seat face and reducing the set load of a return spring. CONSTITUTION:Fuel pressure in a pump chamber acts on the projecting part 38 of an accumulate piston 36 toward the small hole 35 of an accumulate cylinder 33, against the pressing force due to the set load of a return spring 43 and, finally, overcomes the pressing force starting to lift up the accumulate piston 36. At this time, since the flow rate of fuel to a seat face 37 is restricted by a throttle passage formed in between the projecting part 38 and the small hole 35, pressure which acts on the seat face 37 is reduced and nearly the projecting part 38 alone is subjected to the fuel pressure. Accordingly, since only the set pressure of the return spring corresponding to the area of the pressure receiving face of the projecting part 38 is required at the time of pilot injection, the set load can be reduced, reducing variation due to aging effect.

14. 发明专利

JPS62210226A INJECTION RATE CONTROLLER FOR FUEL INJECTION PUMP 失效
公开(公告)号：JPS62210226A
公开(公告)日：1987-09-16
申请号：JP5050386
申请日：1986-03-10
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： NISHIMAKI HIROAKI , YAMADA YASUO , SUMIYA SHINYA , KAWAGOE MICHIO
IPC分类号： F02D1/02 , F02M41/12 , F02M45/00
摘要： PURPOSE:To control the fuel injection rate finely by coupling an accumulate cylinder to a fuel pressurizing chamber and performing the open/close control of a bypath of a back pressure chamber of an accumulate position. CONSTITUTION:An accumulate cylinder 20 is coupled to a fuel pressurizing chamber 4 and a back pressure chamber 30 of an accumulate piston 34 in the accumulate cylinder 20 is communicated through a bypath 33 to the low pressure side. A valve 36 having a spill port 38 is provided in the bypath 33. The valve 36 is opened/closed by means of a solenoid coil 37 to control the injection rate. Consequently, the fuel injection rate can be controlled finely corresponding to the operating condition.

15. 发明专利

JPS61182457A ACCUMULATED FUEL INJECTION VALVE 失效
公开(公告)号：JPS61182457A
公开(公告)日：1986-08-15
申请号：JP2424785
申请日：1985-02-08
申请人： NIPPON DENSO CO
发明人： KANO HIROYUKI , NISHIMAKI HIROAKI , YAMADA YASUO , KATO MASAAKI
IPC分类号： F02M47/02
摘要： PURPOSE:To enable shifting of the volume of a pressure accumulating chamber and to facilitate ensurance of a minimum injection amount, by a method wherein a pressure accumulating chamber in a title injection valve is divided into plural parts which are connected to each other through a communicating passage, and a control valve is located in the communicating passage. CONSTITUTION:First and second holder bodies 7 and 8 are coupled together by means of a holder nut 5, the second holder 8 and a nozzle body 9 are intercoupled by means of a holder nut 10, and a first pressure accumulating chambers 21 is formed in the first body 7, and a second pressure accumulating chamber 25 and a control valve chamber 28 are formed in second holder body 8. The first pressure accumulating chamber 21 is communicated with the second pressure accumulating chamber 25 through fuel passages 22, 25, 27, a control valve chamber 28, and fuel passages 31 and 40. A check valve 11 and a needle valve 46, which are energized by springs 12 and 14, are engaged with pressure accumulating chambers 21 and 25, respectively. A control valve 48, energized by a spring 16, is contained in the control valve chamber 28, the communication between the fuel passages 27 and 31 can be shut off by the valve 48, and the volume of the pressure accumulating is variable.

16. 发明专利

JPH04287864A FUEL INJECTION DEVICE 失效
公开(公告)号：JPH04287864A
公开(公告)日：1992-10-13
申请号：JP8090291
申请日：1991-03-18
申请人： NIPPON DENSO CO
发明人： NISHIMAKI HIROAKI , OMORI TOSHIHIKO
IPC分类号： F02M45/06 , F02M59/26
摘要： PURPOSE:To prevent the generation of abnormal injection such as uneven injection, irregular injection, secondary injection and intermittent injection at the fuel injection terminating time of an injector. CONSTITUTION:A check valve 69 is provided in a spill passage 76 connecting an injection pump chamber 30 to a fuel gallery 16. Upon terminating injection, the injection pump chamber 30 and the fuel gallery 16 are communicated with each other by the spill passage 76, and fuel in the injection pump chamber 30 overflows into the spill passage 76 by the action of an injection plunger 28. At this time, the fuel in the spill passage 76 flows only onto the fuel gallery 16 side, and the flow of the fuel into the injection pump chamber 30 from the fuel gallery 16 is impeded by the check valve 69.

17. 发明专利

JPH02275058A FUEL INJECTION SYSTEM 失效
公开(公告)号：JPH02275058A
公开(公告)日：1990-11-09
申请号：JP9559889
申请日：1989-04-14
申请人： NIPPON DENSO CO
发明人： NISHIMAKI HIROAKI
IPC分类号： F02M47/00 , F02M51/00
摘要： PURPOSE:To enable delta-type injection by installing a valve means being controlled according to pressure in a back pressure chamber, in a passage connecting a nozzle to a pressure accumulating pipeline, storing high pressure fuel, being interconnectible to the back pressure chamber to hold pressure acting on a nozzle needle of an injector. CONSTITUTION:A large diametral part 11 of a nozzle needle 9 is fitted in a valve element sliding port 3 of a valve casing 1 free of slide motion, opening or closing a nozzle 7 by a valve body 17 at a lower part of this needle 9. In addition, a piston 23 is solidly installed in a tip of a connecting part 13 of the needle 9 via a piston pin 21. Then, fuel out of a common pressure accumulating pipeline 49 being connected to a high pressure feed pump 45 is fed to a back pressure chamber 31 to be partitioned off by the piston 23 being fitted in a cylinder 29 after selecting it in a gap with a fuel tank 51 by a three-way solenoid valve 53. In a suchlike injector, a spool valve 60, being controlled in accordance with pressure in the back pressure chamber 31 and controlling a fuel supply to the nozzle 7 in the initial stage of injection, is installed in a passage leading to the nozzle 7 from the pressure accumulating pipeline 49.

18. 发明专利

JPH08296517A DISTRIBUTOR TYPE PUMP 失效
公开(公告)号：JPH08296517A
公开(公告)日：1996-11-12
申请号：JP10606695
申请日：1995-04-28
申请人： NIPPON DENSO CO
发明人： NISHIMAKI HIROAKI , SAKAI HIROMI
IPC分类号： F02M41/14
摘要： PURPOSE: To provide a distributor type pump which makes injection end characteristics of each cylinder uniform when injection ends. CONSTITUTION: A communicating passage 25 which is extended from a plunger chamber 21 which is partitioned and formed at one end to the center in the axial direction toward the other end is formed in a distribution rotor 13, and furthermore a discharge passage 27 and an auxiliary discharge passage 28 which are opened on an outer wall of the distribution rotor 13 by extending obliquely to the outside in the radial direction from the communicating passage 25 toward the other end are formed. Respective opening ends of the discharge passage 27 and the auxiliary discharge passage 28 communicate with an annular groove 29 formed on an outer peripheral wall of the distribution rotor 13, respectively. The discharge passage 27 and the auxiliary discharge passage 28 are formed to send out high pressure fuel in the plunger chamber 21 into the annular groove 29, and the inside diameter of the auxiliary discharge passage 28 is set to almost a half of the inside diameter of the discharge passage 27.

19. 发明专利

JPH03260335A WIRING OF ENGINE CONTROL SYSTEM 失效
公开(公告)号：JPH03260335A
公开(公告)日：1991-11-20
申请号：JP5775390
申请日：1990-03-08
申请人： NIPPON DENSO CO
发明人： NISHIMAKI HIROAKI , OMORI TOSHIHIKO
IPC分类号： F02B77/00 , F02M51/04
摘要： PURPOSE:To improve incorporating workability and sealing property by building up a wire harness for electrically connecting a fuel injection device to a control device with an engine harness and a control harness while forming the engine harness of both inner and outer harnesses. CONSTITUTION:An engine control system is provided with a fuel injection device 22 installed on an engine head 21, a control device 4 mounted in a carbureter 3 and a wire harness 5 for electrically connecting these devices to each other. The wire harness 5 is composed of an engine harness 51 and a control harness 52, and the engine harness 51 is formed of an inner harness 511 formed into one bundle in an engine to branch lead wires 5110 per fuel injection device 22 of each cylinder and an outer harness 512 disposed outside the engine. Both inner and outer harnesses 511, 512 are connected to each other by a terminal 54. The outer harness 512 and control harness 52 are mutually connected by a connector 53.

20. 发明专利

JPH0318645A ACCUMULATOR FUEL INJECTION DEVICE FOR DIESEL ENGINE 失效
公开(公告)号：JPH0318645A
公开(公告)日：1991-01-28
申请号：JP15134789
申请日：1989-06-14
申请人： NIPPON DENSO CO
发明人： NISHIMAKI HIROAKI
IPC分类号： F02D41/04 , F02B3/06 , F02D41/38
摘要： PURPOSE:To prevent overshoot by changing a correction coefficient in relation to a control signal for controlling a high pressure feed pump on the basis of the engine load rate-of-climb, thereby enabling the actual common rail pressure to follow the command value accurately. CONSTITUTION:The characteristic among the engine speed, the engine load rate-of-climb and a pressure rise correction coefficient for correcting a control signal for controlling a high pressure feed pump 7 are previously stored in a characteristic storage means 100. At the time of accelerating operation, a pressure rise correction coefficient enumerating means 101 enumerates a pressure rise correction coefficient from the characteristic storage means 100 on the basis of the engine speed and the engine load rate-of-climb operated by an engine load rate-of-climb arithmetic means 102, and the high pressure feed pump 7 is controlled by a control signal operated by an arithmetic processing means 103 on the basis of the enumerated high pressure correction coefficient. The common rail pressure can thus follow the command value accurately so as to prevent the generation of overshoot and thereby reduce the fuel cost as well as prevent the generation of noise.

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