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31. 发明专利

JPH06129320A FUEL TANK INTERNAL PRESSURE ADJUSTING DEVICE 失效
公开(公告)号：JPH06129320A
公开(公告)日：1994-05-10
申请号：JP27849692
申请日：1992-10-16
申请人： NIPPON DENSO CO
发明人： IIDA HISASHI , TAGAWA YASUO
IPC分类号： F02M37/00 , F02M25/08
摘要： PURPOSE:To miniaturize a canister and reduce the quantity of evaporated fuel leaking to atmosphere in leakage breakdown by adjusting the pressure in a fuel tank while the fuel tank and evaporated fuel suction means are communicated to first specified pressure while an engine is running and to second specified pressure that is lower than the first specified pressure while the engine stops. CONSTITUTION:A pressure adjusting valve 100 is normally closed, and the pressure in a fuel tank increases due to fuel evaporation. When the pressure in the fuel tank 7 exceeds first specified pressure with running of an engine 1 detected, the pressure adjusting valve 100 opens. While the stop of the engine 1 is detected, the valve 100 opens at second specified pressure that is higher than the first specified pressure. By this valve opening, evaporated fuel passes through a purge pipe 36 and is discharged to a canister 37 and is sucked. Thus, the inside of the fuel tank 7 is kept at specified pressure depending upon whether the engine is running or stops.

32. 发明专利

JPH04309816A FLOW RATE DETECTOR FOR VAPORIZED FUEL GAS 失效
公开(公告)号：JPH04309816A
公开(公告)日：1992-11-02
申请号：JP7541491
申请日：1991-04-08
申请人： NIPPON DENSO CO , UBUKATA SEISAKUSHO KK
发明人： NAKAJIMA AKIHIRO , ISOMURA SHIGENORI , IIDA HISASHI , TSUJI TAKEO , KOSEKI HIDEKI
IPC分类号： F02M37/00 , F02D41/00 , F02M25/08 , G01F1/34 , G01F1/36 , G01F1/38 , G01F1/50 , G01F3/38
摘要： PURPOSE:To provide a flow rate detector for vaporized fuel gas capable of detecting flow rate of an extremely small quantity of the vaporized fuel gas. CONSTITUTION:An electromagnetic switch valve 22 is arranged in a communicating passage 21, and pressure of vaporized fuel gas in a fuel tank 7 is detected by means of a magnetic flux detector 20 and so on. A control circuit opens the communicating passage 21 when the pressure of the vaporized fuel gas reaches 15mmHg under a condition that the communicating passage 21 is closed, and closes the communicating passage 21 when the pressure of the vaporized fuel gas falls below 8mmHg, and flow rate of the vaporized fuel gas is calculated according to this time.

33. 发明专利

JPH02301805A DIGITAL CONTROLLER 失效
公开(公告)号：JPH02301805A
公开(公告)日：1990-12-13
申请号：JP12348589
申请日：1989-05-17
申请人： NIPPON DENSO CO
发明人： KAWAI KATSUHIKO , IIDA HISASHI , KATO TATSUNORI
IPC分类号： F02D41/16 , F02D45/00 , G05B13/02 , G05B13/04
摘要： PURPOSE:To allow a digital controller to make highly accurate control with a simple constitution by dividing the operating time of the controller into a dead time section and succeeding time section and respectively identifying dynamic models to the sections by means of a discrete system, and then, previously constructing the dynamic model of a whole control system based on the identified dynamic models. CONSTITUTION:This digital controller is provided with a detecting means 30, actuator 44, and control means 20. Firstly, the 1st and 2nd dynamic models are respectively identified against the dead time section of the controller until the actuated state of the controller starts to change after a control signal is inputted to the actuator 44 and the time section following the dead time section and the dynamic model of a whole control system is previously constructed based on the 1st and 2nd dynamic models. Then the quantity of a state variable is decided on the basis of the previously constructed dynamic model and a control signal is outputted to the actuator 44 from an output port 58 in accordance with the quantity of the state variable. Therefore, the control system can make highly accurate control with a simple constitution.

34. 发明专利

JPH01271627A DEVICE FOR CONTROLLING AIR-FUEL RATIO OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH01271627A
公开(公告)日：1989-10-30
申请号：JP9784688
申请日：1988-04-20
申请人： NIPPON DENSO CO
发明人： IIDA HISASHI , NAKABAYASHI KATSUHIKO
IPC分类号： F02D41/14 , F02D41/00
摘要： PURPOSE:To get rid of the smoldering of a plug, etc. by gradually reducing air-fuel ratio to measure the lower limit air-fuel ratio selative value for obtaining the required air-fuel ratio lean limit and, together with a reference relative value, obtaining the correcting factor for a quantity increasing characteristic value, at the time of the calibration of a warming-up period. CONSTITUTION:At the time of the calibration of the warming-up period which is detected by a water temperature sensor 46, a control circuit 30 gradually reduces air-fuel ratio by means of a fuel injection valve 26 to detect the change in engine speed in a defined time, thereby measuring a lower limit air-fuel ratio relative value for obtaining the required air-fuel ratio lean limit of an internal combustion engine. A correction factor for a quantity increasing characteristic is obtained from this value and a corresponding reference air-fuel ratio relative value obtained from a quantity increasing characteristic which is previously set by a ROM 70. An internal combustion engine is controlled by an air-fuel ratio determined by a cooling water temperature by the sensor 46, the quantity increasing characteristic, and the correction factor. Thereby, a warming-up quantity increasing correction as the lower limit air-fuel ratio for each internal combustion engine can be performed, while making it possible to cope with secular change by carrying out the calibration from time to time.

35. 发明专利

JPH01200044A FAIL-SAFE DEVICE FOR INTERNAL COMBUSTION ENGINE FOR VEHICLE 失效
公开(公告)号：JPH01200044A
公开(公告)日：1989-08-11
申请号：JP28278887
申请日：1987-11-09
申请人： NIPPON DENSO CO
发明人： IIDA HISASHI , IWAMOTO SHINICHI , KAMAI KENICHIRO , KINUGAWA MASUMI , ISOMURA SHIGENORI , TAKAO MITSUNORI
IPC分类号： F02D41/22 , F02D41/00 , F02D41/32 , F02D45/00 , F02P5/15
摘要： PURPOSE:To prevent the excessive revolution of an engine by comparing the upper limit intake pressure set according to the opening degree of a throttle valve and the detected intake pressure and judging the generation of anomaly in an intake system when the intake pressure becomes over the upper limit intake pressure. CONSTITUTION:An internal combustion engine is operation-controlled by a control means A on the basis of the intake pressure detected by an intake pressure detecting means B and the number of revolution detected by a revolution speed detecting means C. In this case, an upper limit intake pressure setting means E for determining the upper limit intake pressure on the basis of the detection signal of an opening degree detecting means D for detecting the opening degree of a throttle valve is installed. A judging means F compares the intake pressure detected by the intake pressure detecting means B and the upper limit intake pressure set by the upper limit intake pressure setting means E, and when the intake pressure becomes over the upper limit intake pressure, the generation of anomaly in an intake system is judged. Further, when anomaly is judged, an output reducing means G performs control so that the engine output is reduced.

36. 发明专利

JPH01170731A PRESSURE DETECTOR MOUNTING STRUCTURE 失效
公开(公告)号：JPH01170731A
公开(公告)日：1989-07-05
申请号：JP33134087
申请日：1987-12-25
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： IIDA HISASHI , ISOMURA SHIGENORI , INOUE HIDEHIKO , OKANO HIROSHI
IPC分类号： F02D35/00
摘要： PURPOSE:To prevent dew condensation and detect always accurately intake pressure by connecting a gas filter to one end of an air conduit the other end of which is connected to a device body and receiving a space formed in the gas filter within an intake pipe of an internal combustion engine. CONSTITUTION:A device 10 for detecting pressure in an intake pipe of an internal combustion engine has a device body 11 connected to one end of an air conduit 12 while having a gas filter 13 connected to the other end of air conduit 12. The gas filter 13 is received in a surge tank 3 forming a portion of the intake pipe. Then, a case 15 having a conduit connection 14 is fixed to a stay 16 which in turn is fixed to the surge tank 3 by screws 17 to fix the gas filter 13 to the surge tank 3. A predetermined capacity space 18 formed in the case 15 communicates to the air conduit 12 and surge tank 3 respectively through introducing holes 22, 23.

37. 发明专利

JPS63309772A IGNITION TIMING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS63309772A
公开(公告)日：1988-12-16
申请号：JP14614087
申请日：1987-06-11
申请人： NIPPON DENSO CO
发明人： IIDA HISASHI , OMORI NORIO , INOUE HIDEHIKO , SASAKURA HACHIRO
IPC分类号： F02P5/15
摘要： PURPOSE:To make the maximum torque obtainable without the occurrence of knocking by providing a compensating means for intake temperature in a cylinder to compensate ignition timing within a knocking limit which fluctuates according to change in the intake air quantity or the like of an internal combustion engine. CONSTITUTION:A control device has means 100-300 for detecting the intake air quantity of an internal combustion engine 1, pressure in an intake pipe 2 mounted downstream from a throttle valve 4 and the number of revolutions of the internal combustion engine 1 respectively, and moreover a means 400 for computing the ignition timing of the internal combustion engine 1 on each of detecting signals issued from the means 100-300. In addition to that, the above formation is provided with a compensating means 500 for intake temperature in a cylinder to compensate the ignition timing computed by the means 400 within a knocking limit which fluctuates according to change in the intake air quantity of the internal combustion engine 1 or pressure in the intake pipe 2. Thus, when the intake air in a cylinder 9 of the internal combustion engine 1 changes in its temperature, the ignition timing can be therefore compensated to value compensated for the above-mentioned temperature change.

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