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91. 发明专利

JPH04299084A TORQUE CONTROLLER FOR INTERNAL-COMBUSTION ENGINE 失效
公开(公告)号：JPH04299084A
公开(公告)日：1992-10-22
申请号：JP6491491
申请日：1991-03-28
申请人： HITACHI LTD , NISSAN MOTOR
发明人： YAMAKADO MAKOTO , KADOMUKAI YUUZOU , NAKAMURA YOZO , MAEDA YUJI , NAKAMURA KENICHI , FUKUSHIMA MASAO , MURAKAMI AKIRA
IPC分类号： F02B75/06 , F02D29/06 , F02D45/00 , H02P29/00
摘要： PURPOSE:To suppress disturbance of torque waveform by specifying the fluctuating tendency of output torque from each cylinder and controlling the magnitude of torque which an electric machine impart to or absorbs from an internal-combustion engine. CONSTITUTION:An operating condition detecting section 4 detects the operating condition of an internal-combustion engine based on an output from a sensor 3 detecting the pressure in the cylinder. An output torque fluctuation specifying section 5 arithmetically averages the outputs from the operating condition detecting section 4 for respective cylinders thus specifying the fluctuation of output torque from each cylinder. A torque waveform memory section 6 stores a control torque waveform for canceling the fluctuation of the output torque specified at the output torque fluctuation specifying section 5 according to the operating condition based on a function of crankshaft rotational angle detected through a crank angle sensor 11. A torque control section 7 controls the torque to be generated from or absorbed by a motor generator 2 based on a control torque waveform read from the torque waveform memory section 6.

92. 发明专利

JPH03230798A VEHICLE OSCILLATION DAMPING CONTROLLER 失效
公开(公告)号：JPH03230798A
公开(公告)日：1991-10-14
申请号：JP2041490
申请日：1990-02-01
申请人： HITACHI LTD , NISSAN MOTOR
发明人： KURIYAMA SHIGERU , MAEDA YUJI , NAKAMURA YOZO , NAKAMURA KENICHI , MASUNO KEIICHI , KADOMUKAI YUUZOU , FUKUSHIMA MASAO , MURAKAMI AKIRA
IPC分类号： F02D29/06 , F02D41/08 , F02D41/14 , H02P9/00 , H02P9/14 , H02P101/25 , H02P101/45 , H02P103/20
摘要： PURPOSE:To prevent an automobile from being oscillated due to the fluctuation of the rotational speed of an engine by absorbing torque with a generator to be driven by the engine, when the change of the rotational speed of the engine exceeds a specified value. CONSTITUTION:A device is composed of a battery 1, a + power line 2, a -power line 3, an alternator 4, a stator coil 5, a bridge diode 6, an exciting power source diode 7, an alternator field-coil 8, and the like. When the rotational frequency of an engine is fluctuated, then the output of signal is directed to an S1 command signal terminal. When the input of the S1 command signal is provided, the transistors(TR)2-4 are switched on, and a TR1 is bypassed, and the current of the field coil 8 is increased. After that, when the S1 command signal comes to nothing, then the TR2-4 are switched off, and the working of a step-up circuit 14 is stopped. As a result, the torque of the alternator 4 can be regulated.

93. 发明专利

JPH0378550A CRANK ANGLE SENSOR FOR CONTROL AT EACH CYLINDER OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0378550A
公开(公告)日：1991-04-03
申请号：JP21135489
申请日：1989-08-18
申请人： HITACHI LTD
发明人： MAEDA YUJI , NAKAMURA YOZO , NAKAMURA KENICHI , KADOMUKAI YUUZOU
IPC分类号： G01B21/22 , F02D45/00
摘要： PURPOSE:To detect a combustion condition of respective cylinder by providing a crank angle sensor which generates two pulse signals equal to a crank angle width in every angle with a 720 deg. crank angle divided by a number of cylinders. CONSTITUTION:In a crank angle signal generating mechanism of a four-cycle engine in which combustion is generated in each angle (180 deg. in a four-cylinder engine) with a 720 deg. crank angle divided by a number of cylinders, an interval signal slit 3 corresponding to an interval pulse is provided in a rotary plate 1 rotated by one turn for 720 deg. synchronously with a crankshaft. By detecting the interval by a photointerrupter 2, two interval pulse signals are fed as the third output separately from an angle signal (Pos) for reading one degree and a cylinder discriminating signal (Ref) generated in each cylinder, in the past. A combustion condition classified by the cylinder is detected by processing this interval pulse signal.

94. 发明专利

JPH031517B2 失效
公开(公告)号：JPH031517B2
公开(公告)日：1991-01-10
申请号：JP5124382
申请日：1982-03-31
申请人： HITACHI LTD
发明人： KAWASHIMA KENICHI , NAKAMURA YOZO , TAKAO KUNIHIKO , HAYASE ISAO
IPC分类号： F04C18/344

95. 发明专利

JPH02304955A COOLING DEVICE 失效
公开(公告)号：JPH02304955A
公开(公告)日：1990-12-18
申请号：JP12433789
申请日：1989-05-19
申请人： HITACHI LTD
发明人： MAEDA NAOKI , NAKAMURA YOZO , ASHIWAKE NORIYUKI
IPC分类号： H01L23/473
摘要： PURPOSE:To obtain a high cooling effect and to prevent damage of an electrical heating element due to contamination around the electrical heating element by providing a contact surface for pressing and sliding a cooling member and a surface which contacts the cooling member through a gap where a thermally conductive liquid exists at a thermally conductive element which allows the heat to be conducted to the cooling member by pressing the electrical heating element elastically. CONSTITUTION:A thermally conductive heat-absorbing member 4 is pressed against an electrical heating element 5 which is fixed to a substrate 6 and a thermally conductive liquid 7 is filled into the gap to reduce thermal resistance on the surface of the electrical heating element 5. Heat of the electrical heating element 5 is propagated to a cooling member 2 through a heat-absorbing part 4 and an interlocking member 3 and is further propagated to a cooling member 9 and a cooling fluid 8 toward the outside finally. The interlocking member 3 is interlocked to the thermally conductive member cooling member 2 and the heat-absorbing member 4 so that it can rotate. Thus, the entire heat resistance can be reduced and damage of the electrical heating element due to wear powder can be prevented.

96. 发明专利

JPH02277967A DISTRIBUTOR FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH02277967A
公开(公告)日：1990-11-14
申请号：JP9733689
申请日：1989-04-19
申请人： HITACHI LTD
发明人： SHIMADA JUNICHI , KOBAYASHI KAZUTOSHI , FUJIWARA HIROSHI , ITO TOMOO , NAKAMURA YOZO
IPC分类号： F02P7/10
摘要： PURPOSE:To prevent the occurrence of noises by connecting a shaft rotated synchronously with the rotation of an engine and a gear transmitting the rotation with a pin, providing a gap between the pin connection section of the gear and the pin, and reducing the shock force of the rotation fluctuation on the engine side with the sliding of the gear. CONSTITUTION:The rotation of a driving gear 2 rotated and driven by an internal combustion engine is transmitted to a shaft 4 from a driven gear 3. The shaft 4 and the driven gear 3 are connected by a pin 5. The shaft 4 and the pin 5 are fixed by the shrink fit via press-in, a gap is provided between the pin hole diameter of the driven gear 3 and the pin 5, and it can be slightly slid against the shaft 4. When a fluctuation occurs on the rotating force from the internal combustion engine, it is transmitted to the driven gear 3 as a shock force, the driven gear 3 is slid against the shaft 4, thus the shock force is damped, and the occurrence of the shock sound is reduced.

97. 发明专利

JPH02241929A ROTATION FLUCTUATION REDUCING APPARATUS 失效
公开(公告)号：JPH02241929A
公开(公告)日：1990-09-26
申请号：JP6221889
申请日：1989-03-16
申请人： HITACHI LTD
发明人： KURIYAMA SHIGERU , NAKAMURA YOZO , NAKAMURA KENICHI , MASUNO KEIICHI , KADOMUKAI YUUZOU
IPC分类号： F02B75/06 , F16F15/22
摘要： PURPOSE:To prevent a car body from being repeatedly vibrated by 0.5 order vibration caused by uneven combustion only in a certain cylinder, by detecting the rotational vibration of the 0.5 order vibration, etc. to control a current supply time to the magnetic field coil of an alternator according to the detecting value. CONSTITUTION:These are provided a means for detecting the rotational frequency in every cylinder during idling and a means for calculating from the detecting value the reference rotational frequency throughout all cylinders. A difference between the reference rotational frequency and rotational frequency in every cylinder is obtained to judge the rotational frequency lower than the reference one. When this judgement is continuously repeated predetermined times more than two times for the identical cylinder, the next rotational frequency is also forecast to be lower than the reference rotational frequency, and a magnetic field coil 8a of a voltage regulator 9 is shut off or reduced for a predetermined time. Thus, the rotational vibration such as 0.5 order vibration is detected and a current supply time to the magnetic field coil 8A of an alternator 4 can be controlled according to that detecting value to reduce the rotational fluctuation in individual cylinders.

98. 发明专利

JPH02134793A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH02134793A
公开(公告)日：1990-05-23
申请号：JP28745688
申请日：1988-11-14
申请人： HITACHI LTD
发明人： MAEDA NAOKI , NAKAMURA YOZO
IPC分类号： G11B33/08
摘要： PURPOSE:To improve the positioning accuracy and to reduce noise and vibration by cancelling the resultant force of drive reactions of a positioning mechanism of a combined disk device. CONSTITUTION:When a read/write instruction is given from a control circuit 10, a positioning mechanism of a relevant magnetic disk device single body 12a applies read/write or positioning operation and the same operation signal is sent to the positioning mechanism of other single body 12b arranged intentionally from the single 12a. Thus, the drive reaction forces of the positioning mechanism moved acceleratingly are cancelled. The drive reaction forces are delivered via a link spring 18 and balanced, then the relative displacement of the drive reaction force of the single bodies 12A, 12B is reduced by selecting the spring constant of a spring 18.

99. 发明专利

JPH0211752B2 失效
公开(公告)号：JPH0211752B2
公开(公告)日：1990-03-15
申请号：JP15626681
申请日：1981-10-02
申请人： HITACHI LTD
发明人： TAKAO KUNIHIKO , KAWASHIMA KENICHI , KISHI ATSUO , NAKAMURA YOZO
IPC分类号： F04C18/344 , F04C29/12

100. 发明专利

JPH0221068A PISTON DEVICE 失效
公开(公告)号：JPH0221068A
公开(公告)日：1990-01-24
申请号：JP16872288
申请日：1988-07-08
申请人： HITACHI LTD
发明人： ISHIYAMA AKIHIKO , NAKAMURA YOZO , TOJO KENJI , OGINO KENJI , ABE NOBUO , MATSUURA ISAO
IPC分类号： F04B39/00 , F16J1/22
摘要： PURPOSE:To have a high reliability and make an assembly quality excellent, by having a press-fitting spring whose contact portion with a spherical body is a high rigid portion of an approximate annular shape of a semi-circular section and the tip of whose start up portion which is along a piston shaft direction in continuation of the high rigid portion and has elasticity, is engagingly stopped at a projection at the inside diameter of a piston. CONSTITUTION:A spherical body 2 and an engagement-stop spring 5 come into a line contact due to the tip portion of the engagement-stop spring 5 being a high rigid portion 51 of an approximate annular shape of a semi-circular section. Also, a start up portion 52 having elasticity is provided with inclination surfaces at more than 2 places, so the force of spring in a direction in which the spherical body 2 is press- fitted and the force of spring in a direction in which the start up portion 52 is closely fitted to the inner surface of a piston 3, are simultaneously obtained, and also, the start up portion 52 is provided at more than 3 places, so the force of spring acts upon in a direction in which the spherical body 2 is always retained at a piston 3 center. Accordingly, the spherical body 2 can be stopped engagingly in stabilization at a spherical seat portion 4, and in addition, an excellent assembly quality can be obtained due to the elasticity of the start up portion 52.

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