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91. 发明专利

JPH09203339A AIR FUEL RATIO CONTROL DEVICE AND AIR FUEL RATIO CONTROL METHOD 失效
公开(公告)号：JPH09203339A
公开(公告)日：1997-08-05
申请号：JP1295196
申请日：1996-01-29
申请人： HITACHI LTD
发明人： NAKAGAWA SHINJI , KURIHARA NOBUO , FUJIEDA MAMORU
IPC分类号： F02D45/00 , F02D41/04 , F02D41/16 , F02D41/34
摘要： PROBLEM TO BE SOLVED: To obtain a well stabilized air fuel ratio control at the time of idling when it is applied to an in-cylinder injection engine or a lean mixture burning systemengine. SOLUTION: Whether is being an engine idles or not, is judged (STEP 1), whether an absolute value of the difference between a present injection quantity-signal T1 and a fixed time preceding injection quantity-signal TIO exceeds a fixed value or not, is judged (STEP 3), sampling of a signal obtained by an air fuel ratio sensor is performed while the above fixed value is not reached by means of STEP 3, and the frequency-analysis of a signal to be obtained after a fixed time is performed (STEP 6). When the air fuel ratio-signal is frequency-analyzed and a spectrum above a fixed value is detected, the frequency of the spectrum is detected (STEP 6), and a correction factor (f) is calculated based on the detected frequency (STEP 8). A value obtained by adding the correction factor (f) in a direction to cancel the change, to the injection quantitysignal TI, is regarded as a final injection quantity-signal (STEP 9). Thus, a stabilized fuel injection, which is unaffected by noise, can be performed, and the change in the air fuel ratio at the time of idling can be reduced.

92. 发明专利

JPH08277742A CONTROLLER FOR AUTOMOBILE 失效
公开(公告)号：JPH08277742A
公开(公告)日：1996-10-22
申请号：JP5879396
申请日：1996-03-15
申请人： HITACHI LTD
发明人： FUJIEDA MAMORU , OSUGA MINORU , NOGI TOSHIJI , OYAMA TAKASHIGE
IPC分类号： B60G17/015 , B60K28/10 , F01N3/20 , F02D29/02 , F02D41/14 , F02D45/00 , F02P5/152 , F02P5/153 , F16H61/00
摘要： PURPOSE: To coordinate the automobile motion property matching to the sence of a driver by inputting the output signal from a plurality of sensors into the input layer of a hierarchical neuro element, and controlling an actuator for control of an automobile, based on the result of the final output of the neuro element. CONSTITUTION: At the time of operation of an automobile, a controller 53 outputs air-fuel ratio A/F, torque T, and acceleration g, as target values, to a neutral controller. This neutral controller 50 adds the time Tinj of opening a fuel injection valve, the term Tig of ignition, the aperture θ of a throttle, the speed change position Ptr of a transmission, and the pressure OP1 of a line, and output them to each actuator so as to control the operation of an engine. At this time, the actual air-fuel ratio A/Fr, torque Tr, and acceleration gr of an automobile are measured, and these are inputted into an error feedback part 52 together with the target values, and here the error and the correction are computed, and the neutral controller 50 is reconstituted.

93. 发明专利

JPH06117896A MULTIFUNCTIONAL AIR FLOWMETER 失效
公开(公告)号：JPH06117896A
公开(公告)日：1994-04-28
申请号：JP26842692
申请日：1992-10-07
申请人： HITACHI LTD
发明人： NISHIMURA YUTAKA , FUJIEDA MAMORU
IPC分类号： F02D45/00 , G01F1/00 , G01F1/68 , G01F1/698
摘要： PURPOSE:To reduce the size of and number of wires used in this flowmeter by inputting the potentials at a hot-wire probe and between fixed resistances to a computer for arithmetic operation and uniting an air flowmeter and air thermometer in one body. CONSTITUTION:The flowmeter maintains the temperature difference between a hot-wire probe 9 and air temperature probe 10 at a fixed level irrespective of the flow rate of air and uses the then supplied current as an air flow rate signal. Therefore, when the potentials V1 and V2 at both ends of the probe 9 are inputted to an engine controller 103 through zero-span adjusting circuits 101 and 102 and the microcomputer of the controller 103 makes calculation on the potentials, the temperature of the air can be found. Namely, the microcomputer of the controller 103 calculates the resistance of the probe 9 from the potentials V1 and V2 based on a specific formula, reads the outputs V3 and V4 of the circuits 101 and 102, and calculates the ratio V1/V2. Then the controller 103 finds the temperature of the air from the ratio V1/V2 by table look-up. Thus the flowmeter can be reduced in size and number of wires, because it is not necessary to provide any new sensor section for detecting the air temperature.

94. 发明专利

JPH06117319A CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH06117319A
公开(公告)日：1994-04-26
申请号：JP26575492
申请日：1992-10-05
申请人： HITACHI LTD
发明人： OYAMA TAKASHIGE , OSUGA MINORU , NOGI TOSHIJI , FUJIEDA MAMORU , KURIHARA NOBUO
IPC分类号： F02B17/00 , F02B31/00 , F02D45/00 , F02M25/07 , F02P5/15
摘要： PURPOSE:To improve operability by preventing the step difference of torque caused by the change of an excess air ratio and the sudden change of torque by the depression of an accelerator pedal. CONSTITUTION:When an excess air ratio is made lambda, the air quantity is made Ga, and the fuel quantity is made Gf, the relation of Gf=Ga/lambda is materialized. When lambda changes from 1.0 to 1.4, Ga is increased to 1.4 times according to the target value of torque being in the same state. Then Gf does not change, and the step difference of torque is eliminated. Ga is controlled using an air valve by-passing a throttle valve or an electronically controlled throttle valve. In relation to the depression quantity alpha of an accelerator pedal, the air quantity Ga entering an engine is measured instead of controlling Gf directly. Since Gf is delayed in relation to alpha according to the volume ratio of an intake pipe, Gf is controlled on the basis of this Ga. The sudden change of torque is thereby prevented, and the operability of the internal combustion engine is improved by avoiding the sudden change of torque.

95. 发明专利

JPH0642434A FUEL INJECTION VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0642434A
公开(公告)日：1994-02-15
申请号：JP28020692
申请日：1992-10-19
申请人： HITACHI LTD
发明人： OYAMA TAKASHIGE , FUJIEDA MAMORU , YAMAUCHI TERUO , OSUGA MINORU
IPC分类号： F02D41/04 , F02D41/14 , F02M61/18 , F02M69/00 , F02M69/04
摘要： PURPOSE:To provide a fuel injection valve device for an internal combustion engine which prevents the flow-in of the fuel jetted into the cylinder of an engine, into an air passage for feeding the auxiliary air and prevents the deflection of the fuel mist due to the air stream. CONSTITUTION:A plurality of air passages 142 are formed on the downstream side of the ball valve 139 of an injection valve 109 fixed on an intake pipe 107, and allowed to communicate to an air passage 137 formed in an annular form on the outer peripheral surface of the injection valve body which communicates to an air passage 136 communicating to a three-way valve, and the upper and lower parts are sealed by O-rings 141, 141', etc., and the air which flows into, passing through the air passage 142 is mixed with fuel in a nozzle part 140, and discharged.

96. 发明专利

JPH05133282A EGR DEVICE 失效
公开(公告)号：JPH05133282A
公开(公告)日：1993-05-28
申请号：JP29288791
申请日：1991-11-08
申请人： HITACHI LTD
发明人： FUJIEDA MAMORU , OSUGA MINORU , OYAMA TAKASHIGE
IPC分类号： F02D21/08 , F02D13/02 , F02M25/07
摘要： PURPOSE:To enable EGR control with high accuracy by considering air concentration fluctuation on a downstream side volume of a valve accompanied with pressure fluctuation caused by EGR inside an engine (contraflow EGR from an intake valve of the engine) and a throttle valve opening. CONSTITUTION:An air flowmeter 5 provided on an intake pipe 1 obtains an air flow rate Go passing a throttle valve. A pressure detection value Pm from a pressure detector 9 provided on a downstream side of a throttle valve 6 and an EGR conduit outlet 10b formed in the intake valve 1 is multiplied by a cylinder volume efficiency to calculate a cylinder air inflow rate Gc. An air increasing/decreasing amount k.dpm/dt on a downstream side volume of the throttle valve 6 is calculated from fluctuation of the detection value Pm of the pressure detector 9. A control circuit 4 calculates an EGR rate Ge through the following equation: Ge=Gc+k.dpm/dt-Go. Based on deviation between the resultant value and a target EGR rate, an EGR valve 8 is feedback- controlled.

97. 发明专利

JPH04143443A COMBUSTION CONTROL METHOD AND DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH04143443A
公开(公告)日：1992-05-18
申请号：JP26525990
申请日：1990-10-04
申请人： HITACHI LTD
发明人： OSUGA MINORU , NOGI TOSHIJI , FUJIEDA MAMORU , OYAMA NOBUSHIGE
IPC分类号： F02P17/12 , F02D45/00 , F02P3/045 , F02P17/00
摘要： PURPOSE:To secure an accurate combustion control by judging a generating status of diffuse combustion in a combustion chamber from the detected result of combustion light, and according to this judged result, setting a burning state controlling parameter. CONSTITUTION:Light detected at a light deriving part of a spark plug 2 is conducted into a light signal processing part 4 by way of a light transmission line 3, extracting information on a burning state from a light signal hereat, and it is fed to a controller 5. Here the light signal processing part 4 converts the light signal such as a luminous flame due to fuel liquid drips in a combustion chamber 1 into an electric signal and is fed to the controller 5. Then, this controller 5 judges a generating state of diffuse combustion in this combustion chamber 1 on the basis of this electric signal, setting burning state controlling parameter according to this judged result. With this constitution, since an accurate burning state is always graspable, proper combustion control is easily and accurately securable.

98. 发明专利

JPH0491348A AUTOMOBILE CONTROL DEVICE 失效
公开(公告)号：JPH0491348A
公开(公告)日：1992-03-24
申请号：JP20240190
申请日：1990-08-01
申请人： HITACHI LTD
发明人： FUJIEDA MAMORU , OSUGA MINORU , NOMOTO TOSHIJI , OYAMA TAKASHIGE
IPC分类号： B60W10/00 , B60W10/04 , B60W10/06 , B60W10/10 , F02D41/22 , F02D45/00 , F02P17/00 , F02P17/12
摘要： PURPOSE:To always attain adequate control by inputting signals, related to an engine speed, knocking, exhaust temperature, air-fuel ratio, cooling water temperature and lubricating oil temperature, to a story type nerve circuit model, and outputting information for showing possibility of generating burning in an engine cylinder wall surface. CONSTITUTION:A predetermined arithmetic process is executed to create a control signal by fetching necessary signals from detectors of engine speed detector 3, O2 sensor 4, air flow meter 5, knocking sensor 6, cooling water temperature sensor 7, exhaust temperature sensor 8, oil temperature sensor 9, etc., to an engine main unit 1. In an engine control circuit 2, a nerve circuit model 15 is additionally provided. A signal D for showing possibility of generating burning in a cylinder wall surface is generated from each signal for respectively showing cooling water temperature, knocking generation, oxygen concentration, exhaust gas temperature, engine speed and lubricating oil temperature. A rotational speed of a cooling fan 13 is increased by the engine control circuit 2 in accordance with this signal D, and generation of seizure of the engine 1 is prevented by increasing heat radiating power of a radiator 22 to decrease the cooling water temperature.

99. 发明专利

JPH0454275A INJECTION VALVE INSIDE CYLINDER 失效
公开(公告)号：JPH0454275A
公开(公告)日：1992-02-21
申请号：JP16413190
申请日：1990-06-25
申请人： HITACHI LTD
发明人： FUJIEDA MAMORU
IPC分类号： F02M57/06
摘要： PURPOSE:To conduct the integration of an ignition plug and an injection valve without any performance change, and install them at the optimum positions of a cylinder, respectively by placing a one way valve within an ignition plug center electrode, and arranging the lower stream passages of the one way valve within a plug body constituting and earth electrode. CONSTITUTION:The center electrode of an ignition plug is divided into a cylinder side electrode 10 and a distributor side electrode 13, and both are covered with insulators 12. Also, insulators 12 are fixed by means of a plug body 11, and also an earth electrode 15 is projected through the body 11. In this instance, a one way valve 16 is tightly adhered to a valve seat 19 by the ensile strength of a spring 17, and also the spring 17 gives tensile strength to the valve 16 through a spring receiver 18. The valve 16 is opened when air is supplied to a passage 20, and air is jetted out into the inside of a cylinder through passages 21, 22a, 22b. In addition, fuel is also supplied into the passage 20, and injected into the cylinder together with the current of air through passages 20, 21, 22a, 22b.

100. 发明专利

JPH02153257A FUEL FEED DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH02153257A
公开(公告)日：1990-06-12
申请号：JP30414188
申请日：1988-12-02
申请人： HITACHI LTD
发明人： FUJIEDA MAMORU , OYAMA TAKASHIGE
IPC分类号： F02M67/02 , F02B75/12 , F02M69/08
摘要： PURPOSE:To prevent the delay of a fuel feed timing despite of an increase in the number of revolutions by a method wherein, in a device which feed fuel by means of an air pressure with the aid of a one-way valve in a cylinder, a member to vary a pressure in an air passage is provided in order to correct the compression delay of the air passage. CONSTITUTION:During running of an engine, fuel is previously fed on the upper stream side of a one-way valve 6 by means of a fuel injection valve 5. When air is distributed to distribution pipes 12a - 12d by means of a rotary valve 8 of an air distributor 9 driven in linkage with the crank shaft of an engine 15, the one-way valve 6 is forcibly opened by means of an air pressure, and fuel and air are fed to the engine 15. The distributing pipes 12a - 12d are communicated with a common groove 16, and the common groove 16 is communicated to a discharge pipe 14 in the middle of which a control valve 10 is provided. Through introduction of a pressure in the discharge pipe 14 to a fuel pressure regulator 51 through a conduit 55, control of the delivery pressure of a fuel pump 52 is performed.

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