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71. 发明专利

JPH11183220A HEATING RESISTOR TYPE AIR FLOW RATE MEASUREMENT APPARATUS 失效
公开(公告)号：JPH11183220A
公开(公告)日：1999-07-09
申请号：JP35129297
申请日：1997-12-19
申请人： HITACHI LTD
发明人： OTA KENJI , SUGAYA ATSUSHI
IPC分类号： G01F1/68 , F02D41/18 , F02D41/24 , G01F1/698 , G01F15/04
摘要： PROBLEM TO BE SOLVED: To provide a heating resistor type air flow rate measurement appara tus using an electronic trimming system which prevents the flow rate error due to abnormal flow rate correction data to obtain a flow rate output always adequately corrected for errors. SOLUTION: The flow measurement apparatus, having an air flow rate conversion processor block 30, voltage output correction processor block 31 and flow rate correcting block 32 which corrects an air flow rate QaTbl, signal flow rate error CmQa computed from this flow rate, using trimming flow rate correction data QaMaP (q, a, b) previously prepared in a memory and trims it to compute a flow rate QaRef, comprises a data diagnosis block 33 which diagnoses the trimming flow rate correction data QaMap (q, a, b) to be read when power is set on, and executes a failure process when wrong data are read.

72. 发明专利

JPH11159355A VARIABLE DRIVE CONTROL DEVICE FOR VALVE MECHANISM OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH11159355A
公开(公告)日：1999-06-15
申请号：JP32986997
申请日：1997-12-01
申请人： HITACHI LTD
发明人： SUGAYA ATSUSHI , SHIRAISHI TAKUYA , NOGI TOSHIJI
IPC分类号： F02B29/08 , F02D13/02 , F02D41/20
摘要： PROBLEM TO BE SOLVED: To improve the output efficiency while lowering the pumping loss by controlling the driving pulse of an intake and exhaust valves so that the exhaust valve is driven in the same direction with the intake valve through a lap position of the intake and the exhaust valves before the intake valve arrives at the lap position when the intake valve is being to be opened in the condition that the exhaust valve is opened. SOLUTION: Variable valve mechanism 40, 41 for controlling the opening and closing operation of an intake valve 10 and an exhaust valve 11 are provided, and these are controlled by a variable valve control means 30 on the basis of the signal from an operating condition detecting means 64. At this stage, the valves are controlled so that the lifted variable is maintained for the predetermined period when the valve opening operation of the intake valve 10 starts at a crank angle, at which the exhaust valve 11 is opened yet, and when the valve opening achieves the predetermined value near the maximum lifted variable. Namely, an intake and an exhaust strokes of the intake and the exhaust valves 10, 11 are set at a nearly rectangular shape so as to continuously maintain the predetermined quantity of the lifted variable for the predetermined period near the maximum value, and a buffer area is set at the time of valve unit seating operation, and with this structure, the gas in the combustion chamber can be efficiently exchanged.

73. 发明专利

JPH10300544A METHOD AND APPARATUS FOR MEASUREMENT OF AIR FLOW RATE 失效
公开(公告)号：JPH10300544A
公开(公告)日：1998-11-13
申请号：JP10735697
申请日：1997-04-24
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： SUGAYA ATSUSHI , ISOGAI MASATO , UCHIYAMA KAORU , MAKIE YASUO , KOBAYASHI CHIHIRO
IPC分类号： G01P13/02 , F02D35/00 , F02D41/18 , F02D45/00 , G01F1/00 , G01F1/68 , G01F1/698
摘要： PROBLEM TO BE SOLVED: To obtain a method and an apparatus in which the pulsation of an air current can be measured without delay and precisely by a method wherein, on the basis of a flow-rate detection signal whose response delay is restored, a threshold value is detected and the direction of the flow of the air is estimated on the basis of the crossing of the threshold value with the flow-rate detection signal whose response delay is restored. SOLUTION: A microcomputer 40 compensates the response delay of a flow-rate detection signal which is obtained from a heat-ray probe 11 and which contains a response delay. It sets a threshold value on the basis of the maximum value and the minimum value of the detection signal whose response delay is compensated, and it judges a reverse-flow section. According to the judged reverse-flow section, the detection signal is compensated, and an air flow rate is measured precisely. That is to say, in order to reduce a measuring error at the pulsation of the air flow rate, the response delay of the flow-rate detection signal obtained from the heat-ray probe 11 is restored. A threshold value is computed on the basis of the detection signal whose response delay is restored. The direction of the flow of the air is estimated on the basis of the crossing of the threshold value with the detection signal whose response delay id restored. Thereby, a following-flow section is discriminated from the reverse-flow section without delay. A correction processing operation can be performed, and the measuring accuracy of an average air flow rate can be increased when a reverse flow is generated.

74. 发明专利

JPH08261753A OPTICAL RADAR DEVICE 失效
公开(公告)号：JPH08261753A
公开(公告)日：1996-10-11
申请号：JP6778195
申请日：1995-03-27
申请人： HITACHI LTD
发明人： KURODA KOJI , SUGAYA ATSUSHI , KURAGAKI SATOSHI , ARIMOTO AKIRA
IPC分类号： G01B11/00 , G01C3/06
摘要： PURPOSE: To realize an optical radar device for vehicles with high resolution with a simple optical system. CONSTITUTION: This device has a light transmission part 100 emitting pulse- modulated light signal in beam in the air, a light reception part 106 for receiving the reflection light from a reflective object and a distance measuring part 107 measuring the existence of a reflective object and the distance and the like from the outputs of the light transmission part 100 and the light reception part 106. The laser beam emitted from the luminous element 104 of the light transmission part 100 is reflected with a polygon mirror 101 and scanned, and the luminous element 104 is made em,t at a timing gradually delayed from the synchronized signal 200 of motor 102 rotation using an emission timing controller, which is scanned with smaller angle divisions than the spread angle of the emitted laser beam.

75. 发明专利

JPH07332966A DISTANCE-MEASURING APPARATUS FOR VEHICLE 失效
公开(公告)号：JPH07332966A
公开(公告)日：1995-12-22
申请号：JP12729494
申请日：1994-06-09
申请人： HITACHI LTD
发明人： KURODA KOJI , SUGAYA ATSUSHI , KOMACHIYA MASAHIRO , ISHII JUNICHI
IPC分类号： G01C3/06 , B60R21/00 , B60W30/00 , G01S11/12 , G01S17/89 , G01S17/93 , G08G1/16
摘要： PURPOSE:To measure a distance with few errors by correctly catching a preceding vehicle or the like even when other obstacles are present in the neighborhood. CONSTITUTION:An image of the front of a vehicle is taken by an image sensor 13. A target 2 a distance of which is to be measured, e.g. a preceding vehicle or the like is extracted from the image data. Then, laser light is cast on the target 2, whereby the distance is measured. The image sensor 13 taking images is used as a photodetecting part 12 for receiving the laser light, thereby to measure the distance to the target according to the principle of triangulation.

76. 发明专利

JPH04261344A PWM CONTROL OSCILLATOR AND SEMICONDUCTOR CHARGE CONTROLLER APPLIED WITH THE OSCILLATOR 失效
公开(公告)号：JPH04261344A
公开(公告)日：1992-09-17
申请号：JP1974591
申请日：1991-02-13
申请人： HITACHI LTD
发明人： SUGAYA ATSUSHI , MARUMOTO KATSUJI , MASUNO KEIICHI , MORI YUICHI , TAKAMATSU SHIYUUICHI
IPC分类号： H02J7/24 , H02M1/08
摘要： PURPOSE:To reduce loss of an entire semiconductor power switch by reducing switching loss at a maximum duty in a controller for PWM-control by using the switch. CONSTITUTION:A semiconductor power switch 3 is connected between a load 4 and a ground side of a power source. The switch 3 pulse-converts an analog input voltage signal VIN of a terminal 1a to a terminal 1b via a PWM control oscillator 1, and switches between a power source VB and a ground by a driving circuit 2 according to a PWM signal output from the oscillator. In this case, the entire loss power of the switch 3 is reduced at 0% and 100% side of a duty by varying a PWM frequency (f) to square functional characteristic. An effect at the l00% side of severe loss is particularly increased, and loss power design of an entire system becomes convenient, and rating of the switch 3 can be reduced as compared with the case of constant frequency control.

77. 发明专利

JPH0412640A CONTROLLER AND CONTROL METHOD FOR GENERATION ON VEHICLE 失效
公开(公告)号：JPH0412640A
公开(公告)日：1992-01-17
申请号：JP11007290
申请日：1990-04-27
申请人： HITACHI LTD
发明人： MARUMOTO KATSUJI , SUGAYA ATSUSHI , MORI YUICHI , MASUNO KEIICHI
IPC分类号： H02J7/24 , H02P9/04
摘要： PURPOSE:To stabilize voltage control properties by providing the voltage feedback loop of an AC generator for battery charge with a compensating circuit. CONSTITUTION:The output voltage of an AC generator 1 for battery 3 charge is controlled so that the deviation between the set voltage value VBC and the feedback value of battery voltage VB may be zero even in the case where a load 11 current has changed sharply, so the voltage fluctuation width can be controlled small. Moreover, even in the case that the power supply wiring becomes long, and that the voltage drops greatly, it is controlled so that the voltage deviation may be zero, so output fluctuation width can be controlled without being affected by wiring. Moreover, even in the transient properties that the load 11 added to generator output changes suddenly, the output voltage can be controlled stably by a compensating circuit 13.

78. 发明专利

JPH02105333A OPTICAL RECORDING SHEET, METHOD AND DEVICE FOR REPRODUCING SUCH RECORDING SHEET 失效
公开(公告)号：JPH02105333A
公开(公告)日：1990-04-17
申请号：JP25860088
申请日：1988-10-14
申请人： HITACHI LTD
发明人： OYAMA SHINJI , IBAMOTO MASAHIKO , SUGAYA ATSUSHI , INUZUKA TATSUKI , KOSAKA MASAHIRO , TSUBOI NOBUYOSHI
IPC分类号： B42D15/10 , G06K1/14 , G06K19/06 , G11B7/00 , G11B7/0033 , G11B7/24
摘要： PURPOSE:To simply and accurately recognize the address of a data row that is presently read out by a line sensor by adding the row markers to an optical recording sheet to discriminate the data rows. CONSTITUTION:A pattern of the dot information includes an area 10 storing the main data showing the voices and pictures and the marker areas 6-1 and 6-2 prepared at the right and left sides of the area 10. While the row addresses 32 and the row markers 33 are set opposite to each data row in the area 10. Then the output voltage obtained from a scanning action of a CCD line sensor 21 is converted into the binary or multi-level digital signals via a waveform shaping circuit 25 and stored in a buffer memory 22. The contents of the memory 22 undergo various correction and arithmetic operations via an arithmetic unit 23. Thus the reproduction picture/voice signals are produced.

79. 发明专利

JPS60171251A MANUFACTURE OF MULTIFOCUS LENS 失效
公开(公告)号：JPS60171251A
公开(公告)日：1985-09-04
申请号：JP2643384
申请日：1984-02-15
申请人： HITACHI LTD
发明人： SONOBE HISAO , OKADA TEIGO , SUGAYA ATSUSHI , KUWABARA KAZUHIRO , MIYAZAKI ROKUROU
IPC分类号： C03C27/06 , C03C27/00 , G02C7/06
摘要： PURPOSE:To form easily a multifocus lens having high accuracy by polishing a transparent plate consisting of tentatively fixed plural transparent bodies to form a single focus lens than dividing the transparent bodies, combining the same into a prescribed arrangement and fixing the lenses. CONSTITUTION:Plural pieces (e.g.; four pieces) of plate-shaped transparent bodies 1 consisting of a transparent material (e.g.; glass, plastic) are adhered and tentatively fixed by an adhesive agent 2 consisting of alpha-cyanoacrylate, etc. and thereafter both surfaces of the resultant transparent plate are polished to form a single focus lens. The lens is then treated with a solvent such as acetone to decrease the adhesive force of the agent 2 and the lens is divided to plural lens pieces 3. The lens pieces 3 are adhered and finally fixed by an epoxy adhesive agent, etc. 8 via spacers 4 to form a multifocus lens having focuses 6a, 6b, 6c, 6d in different positions (a symbol 5 is incident light).

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