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81. 发明专利

JPH04342854A FUEL INJECTION DEVICE OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH04342854A
公开(公告)日：1992-11-30
申请号：JP11338491
申请日：1991-05-17
申请人： NIPPON DENSO CO
发明人： TAKEMOTO HIDETSUGU , MATSUMURA TOSHIMI , SHIBATA MASANORI , NAKAJIMA TATSUSHI
IPC分类号： F02D41/20 , F02D41/40
摘要： PURPOSE:To perform pilot injection at appropriate timings in all the operation range from high to low speed of an internal combustion engine. CONSTITUTION:The control circuit 23 of the fuel injection device 1 of an internal combustion engine impresses a drive voltage to a piezo-element 21 when the output signal of the piezo-element 21 reaches a specific value when the internal combustion engine runs at its low speed, and impresses the drive voltage to the piezo-element 21 a specific time after a reference signal when the engine runs at its high speed.

82. 发明专利

JPH0359262B2 失效
公开(公告)号：JPH0359262B2
公开(公告)日：1991-09-10
申请号：JP7002082
申请日：1982-04-26
申请人： NIPPON DENSO CO
发明人： MYAKI MASAHIKO , MASUDA AKIRA , MATSUMURA TOSHIMI
IPC分类号： F02D41/40 , F02D1/02 , F02D41/38 , F02M41/12

83. 发明专利

JPH0388956A FUEL INJECTION DEVICE IN DISTRIBUTION SYSTEM WITH FACE CAM 失效
公开(公告)号：JPH0388956A
公开(公告)日：1991-04-15
申请号：JP22384289
申请日：1989-08-30
申请人： NIPPON DENSO CO
发明人： INOUE YUTAKA , OKAJIMA TOSHIKAZU , MATSUMURA TOSHIMI , KATO NOBUO
IPC分类号： F02M41/12
摘要： PURPOSE:To prevent wear of a face cam and roller and their seizure by installing a seal at the periphery of a drive shaft between a feed pump and a cam chamber, and furnishing a leak fuel collecting groove leading to the fuel low-pressure side at the periphery of a plunger between a plunger chamber and the cam chamber. CONSTITUTION:Engagement of a face cam 22 with a roller is made in lubricant L, which fills a cam chamber 4, and the fuel discharged by a feed pump 8 passes through a fuel supply path to reach a plunger chamber 21. The fuel in the feed pump 8 is isolated from the lubricant L in the cam chamber 4 by a seal 16, while the fuel in the plunger chamber 21 is isolated from the lubricant L in the cam chamber 4 by a leak duel collecting groove 29. This prevents wear of the face cam 22 and roller and their seizure.

84. 发明专利

JPH0316500B2 失效
公开(公告)号：JPH0316500B2
公开(公告)日：1991-03-05
申请号：JP22698987
申请日：1987-09-10
申请人： NIPPON DENSO CO
发明人： MATSUMURA TOSHIMI , FUJISAWA HIDEYA , OOMORI NORIO , ARIMURA TAKASHI , YAMAZOE HISAMITSU , NISHIURA KYOTAKA
IPC分类号： F02P5/15 , F02D41/16 , F02D43/00

85. 发明专利

JPS643251A FUEL INJECTION DEVICE FOR DIESEL ENGINE 失效
公开(公告)号：JPS643251A
公开(公告)日：1989-01-09
申请号：JP15650087
申请日：1987-06-25
申请人： NIPPON DENSO CO
发明人： NAKAJIMA TATEYUKI , MATSUMURA TOSHIMI , SUMIYA SHINYA
IPC分类号： F02D1/02 , F02B3/06 , F02D41/00 , F02D41/38
摘要： PURPOSE:To prevent the occurrence of hunting of an engine by operating an electrostrictive actuator in the direction of finishing pilot injection when output voltage of a sensor reaches a reference voltage at the time of pilot injection. CONSTITUTION:With the rotation of a pump driving shaft, a cam 8 is lifted so that pressure in a plunger chamber 3 increases and simultaneously output of a sensor 7 increases. When it becomes above nozzle valve opening pressure, pilot injection is started. Subsequently, the plunger chamber pressure continue increasing and the sensor output is compared with a reference voltage by a controller 6. When the output becomes equal to the reference voltage, a piezo element is short-circuited, and output of an electrostrictive actuator 1 suddenly becomes zero to discontinue injection. In the above injection stroke including pilot injection, a reference voltage for deciding the short-circuit time of the piezo element is regarded in such a manner that during idling, at every time, peak values of sensor output are peak-held on every cylinder, and the average value of plural peak values up to the preceding time synchronized with each cylinder is divided at a designated ratio.

86. 发明专利

JPS63208630A FUEL INJECTION RATE CONTROL DEVICE 失效
公开(公告)号：JPS63208630A
公开(公告)日：1988-08-30
申请号：JP4117587
申请日：1987-02-24
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： NAKAJIMA TATSUSHI , MATSUMURA TOSHIMI , SUMIYA SHINYA , IBUKI NORITAKA , KOBAYASHI FUMIAKI
IPC分类号： F02M45/00 , F02D1/02 , F02M41/12
摘要： PURPOSE:To perform adequate pilot injection, forming constitution in small size by providing a small chamber communicating with a pump chamber and large changing its substantial accumulating amount through a slight amount of changing the volume of an electrostrictive type actuator. CONSTITUTION:A housing 21 of an injection rate control device 3 is mounted to a casing 4 of an injection pump main unit 1 by a thread 22. And forming a cylinder bore 24 in the inside of the housing 21, the control device 3 inserts a stepped piston 25 to be slidably fitted to the cylinder bore 24 while forms a chamber 26 between both these cylinder bore 24 and stepped piston 25. While the device 3 provides a through hole 27, through which a high pressure chamber 2 of the injection pump main unit 1 communicates with the chamber 26, to be drilled in a bottom wall 23 of the housing 21 further constitutes an opening and closing valve by a seating edge 28 of the through hole 27 and a conical surface 29 of the stepped piston 25. On the other hand, the control device 3 provides a recess 31 in a large contour part of the stepped piston 25, inserting an electrostrictive type actuator 32 into this recess 31.

87. 发明专利

JPS63143343A CONTROL DEVICE FOR DIESEL ENGINE 失效
公开(公告)号：JPS63143343A
公开(公告)日：1988-06-15
申请号：JP29081186
申请日：1986-12-05
申请人： NIPPON DENSO CO
发明人： MATSUMURA TOSHIMI , OSUGA ISAO
IPC分类号： F02D21/08 , F02B3/06 , F02D41/02 , F02D41/10 , F02D43/00 , F02M25/06 , F02M25/07
摘要： PURPOSE:To control the occurrence of smoke surely as well as to aim at the abatement of NOx in exhaust gas, by lowering a maximum fuel injection quantity and simultaneously stopping recirculation of the exhaust gas when an engine is discriminated to be in accelerating transition. CONSTITUTION:At the time of driving an engine, first the fundamental maximum injection quantity conformed to engine speed and supercharging pressure and the exhaust gas recirculating quantity command value conformed to the engine speed and a command fuel injection quantity are set upon retrieving each two-dimensional map at a control unit 25. Next, when an engine state of load speed or the like is judged to be in an EGR execution range, whether this engine state is in a quick accelerating state or not is discriminated by a fact that whether an accelerator opening variation to be operated from a signal of an accelerator sensor 29 is more than the specified value or not. And, when YES discrimination is the case, a linear solenoid 24 of an injection pump 45 is controlled so as to reduce the maximum fuel injection quantity, while a negative pressure regulating valve 43 is controlled so as to stop exhaust gas recirculation.

88. 发明专利

JPS6325353A FUEL INJECTION CONTROL DEVICE 失效
公开(公告)号：JPS6325353A
公开(公告)日：1988-02-02
申请号：JP16865286
申请日：1986-07-17
申请人： NIPPON DENSO CO
发明人： MATSUMURA TOSHIMI , OSUGA ISAO
IPC分类号： F02D41/04 , F02B3/06 , F02D41/00 , F02D41/40
摘要： PURPOSE:To enable a diesel engine to be maintained at an optimum running state, by a method wherein abnormality on feed fuel is decided from a responding state of a fuel injection timing. CONSTITUTION:When a control circuit 72 decides transient time from whether an accel opening is varied after warming-up of an engine, movement of a timer piston 56 of a distribution type fuel injection pump 1 is started, waiting is effected for a time in which a movement speed is kept at a specified value. The movement speed of a timer is determined from a movement amount of a deviation angle responding to a difference between a reference position signal or a number of revolutions pulse signal and a given signal, and it is decided whether the movement speed is contained in a set speed range regarding a water temperature prevailing during the starting. When it is decided that the movement speed is not contained in a normal area, decision on fuel abnormality is made and is stored in an EEPROM 79, and a display lamp 86 displaying that fuel is abnormal is lighted ON. Since, when, for example, light oil, having fluid point higher than that at the open air temperature or kerosene having low viscosity, is used as fuel, an alrm is effected, this constitution prevents the use of a erroneous fuel.

89. 发明专利

JPS62291453A FUEL INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS62291453A
公开(公告)日：1987-12-18
申请号：JP13526386
申请日：1986-06-11
申请人： NIPPON DENSO CO
发明人： MATSUMURA TOSHIMI , SUMIYA SHINYA
IPC分类号： F02D41/04 , F02D41/00 , F02D41/40
摘要： PURPOSE:To improve response to control of a timer, by a method wherein the change speed of the actual position of a timer for controlling an injection timing a detected, and fluid viscosity in an injection amount of an injection pump is corrected according to fluid viscosity decided from the change speed. CONSTITUTION:According to the running state of an engine, an electromagnetic valve D is controlled by means of an injection timing means F to control an in-pump pressure fed to a fluid pressure type timer mechanism C, and this control causes control of the fuel injection timing of a fuel injection pump B. In this case, a delay means L, deciding elapse of a given time responding to at least a battery voltage after decision of the transient running state of an engine by means of a transient detecting means G is provided. After elapse of the given time, the change speed of a timer actual position by the timer mechanism C is detected by a timer speed detecting means H. From the change speed, fluid viscosity in the injection pump B is decided by a deciding means I, and according to the decided fluid viscosity and the running state of an engine, an injection amount control member E is controlled by an injection amount control means J.

90. 发明专利

JPS6210432A CONTROL DEVICE FOR INTAKE THROTTLE IN DIESEL ENGINE 失效
公开(公告)号：JPS6210432A
公开(公告)日：1987-01-19
申请号：JP14902285
申请日：1985-07-05
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： SUMIYA SHINYA , TAKEMOTO HIDETSUGU , NAKATSUKA KOKEI , IBUKI NORITAKA , MATSUMURA TOSHIMI , IKEDA SHINJI , AOKI KEIJI , KOBAYASHI FUMIAKI
IPC分类号： F02D9/02 , F02B3/06 , F02D41/00 , F02D41/08
摘要： PURPOSE:To effectively prevent idle noise and/or vibration, by controlling an intake throttle valve so that a difference between the peak value of an ignition signal, detected by an ignition detector, and the preset value or the limit reference value, obtained while an engine is in operation, decreases smaller. CONSTITUTION:While an engine is in operation, a CPU10, deciding whether or not the engine is placed in an idle condition on the basis of an output from a rotary angle detector 15 and a load detector 17, decides, when the decision is YES, whether or not the engine is in a condition after it is warmed on the basis of an output from a water temperature detector 16, and when it is decided that the engine finishes warming operation, the CPU10 fetches an output of an ignition detector 2 outputting an ignition signal in accordance with combustion light in a combustion chamber. And the CPU10, detecting a peak value Vp of the ignition signal, obtains a difference from the limit reference value Vt being a peak value immediately before exhaust emission worsens. Subsequently, the CPU10, deciding a value of said difference and adjusting duty ratio of a signal for operating a solenoid valve 19 so that said difference becomes zero, controls an intake throttle valve 1 to be opened and closed.

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