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1. 发明专利

JPH07238850A FUEL INJECTION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH07238850A
公开(公告)日：1995-09-12
申请号：JP2994594
申请日：1994-02-28
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO , NIPPON SOKEN
发明人： TSUZUKI NAOYUKI , OKAJIMA TOSHIKAZU , SAKAI HIROMI , TAKEUCHI YASUHIRO , INABA TAKAYOSHI , ENOMOTO SHIGEIKU
IPC分类号： F02D1/08 , F02D41/06 , F02D41/40 , F02D45/00 , F02M41/12
摘要： PURPOSE:To prevent the generation of smoke and the reduction of the cranking rotation frequency at the starting time, in the fuel injection control device of an internal combustion engine, which controls the opening and closing of an electromagnetic spill valve depending on the output signals of rotation sensors. CONSTITUTION:Two standard position sensors are provided to the second rotary body A5, and the first standard position sensor A9 is set at a specific fuel force feed starting position. Furthermore, the second standard position sensor A10 is set at a specific fuel force feed finish position, and a spill valve control means A11 to control the opening and closing of an electromagnetic spill valve A1 depending on the standard position signals output by the first standard position sensor A9 and the second standard position sensor A10, when a starting time detecting means A8 decides that it is the starting time, is also provided.

2. 发明专利

JPH0370497A STEPPING MOTOR CONTROLLER 失效
公开(公告)号：JPH0370497A
公开(公告)日：1991-03-26
申请号：JP20365289
申请日：1989-08-04
申请人： NIPPON DENSO CO
发明人： NONOMURA TADASHI , SAKAI HIROMI
IPC分类号： F02D41/20 , F02D41/40 , H02P8/00 , H02P8/38
摘要： PURPOSE:To control at an accurate position in a driver such as a fuel injection pump of an internal combustion engine by providing stepping motor position detecting means, step-out detecting and determining means and step-out time correcting means. CONSTITUTION:A stepping motor 51 controls the position of a prestroke of a fuel injection pump. Position detecting means 52 detects the position of the motor 51 and sends its signal to step-out detecting and determining circuit 53. The circuit 53 compares a target number of steps with a position signal, and determines the step-out state of the motor. In case of the step-out state, a correcting number-of-step calculator 56 calculates the number of steps to be corrected necessary to return to a normal state, and outputs a driving pulse to the motor 51 through a pulse rate calculator 57. The motor 51 becomes normal by this correcting operation to be accurately controlled at its position.

3. 发明专利

JPH08261090A DISTRIBUTING TYPE FUEL INJECTION PUMP 失效
公开(公告)号：JPH08261090A
公开(公告)日：1996-10-08
申请号：JP6363195
申请日：1995-03-23
申请人： NIPPON DENSO CO
发明人： NAGANUMA TAKAO , SAKAI HIROMI
IPC分类号： F02M41/14
摘要： PURPOSE: To provide a distributing type fuel injection pump which provides more constant and stable fuel injection amount. CONSTITUTION: A distribution passage 16 which communicates with each cylinder of an internal combustion engine is formed in a cylinder 6. A distribution port 26 is formed by a first groove 261 which is extended in the peripheral direction of a distribution rotor 13 in the distribution rotor 13 which rotates in the cylinder 6. The shape of a bottom face 261a of the first groove 261 is circular arc which has the center on an axis of the distribution rotor 13. When the distribution rotor 13 rotates, the distribution port 26 is communicated with the distribution passage 16, and fuel which is pressurized by a plunger is fed under pressure from the distribution port 26 to the distribution passage 16. Although the peripheral direction position of the distribution port 26 which is communicated with the distribution passage 16 when fuel is fed under pressure differs depending on timer position, the fluctuation of discharge passage area during the communication of the distribution port 26 with the distribution passage 16 is small because the bottom face 261a of the first groove 261 is formed into the circular arc shape, and constant and stable fuel injection amount can be obtained.

4. 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.

5. 发明专利

JPH0552146A ACCUMULATOR FUEL INJECTION DEVICE FOR DIESEL ENGINE 失效
公开(公告)号：JPH0552146A
公开(公告)日：1993-03-02
申请号：JP2269392
申请日：1992-02-07
申请人： NIPPON DENSO CO
发明人： SUGIMOTO HIDEO , SAKAI HIROMI , TAKEUCHI YASUHIRO
IPC分类号： F02D41/40 , F02B3/06 , F02D41/38 , F02D45/00
摘要： PURPOSE:To suppress fuel leakage so that a Diesel engine can be safely operated, in the case of generating the fuel leakage in a fuel supply system of reaching a fuel injection valve through a common rail from a supply fuel pump, in an accumulation fuel injection device for the Diesel engine. CONSTITUTION:Fuel leakage is decided (260) by whether a target electrification starting period TF for feedback-controlling a fuel delivery amount from a supply fuel pump, so that a common rail pressure obtains a target pressure PF, is generated less than a reference value TL or not. In the case of generating the fuel leakage, its degree T is obtained (290) from the target electrification starting period TF and the reference value to limit an upper limit of the target pressure PF of the common rail by determining (300) an upper limit value PL such that the larger is increased the value T the smaller the upper limit value is decreased.

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