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71. 发明专利

JP2001333507A GENERATOR APPARATUS FOR VEHICLE AND CONTROL METHOD THEREFOR 失效
公开(公告)号：JP2001333507A
公开(公告)日：2001-11-30
申请号：JP2000379350
申请日：2000-12-13
申请人： HITACHI LTD
发明人： MAEDA YUJI , MASUNO KEIICHI , SHIMIZU HISAYA , YAMAMOTO TATSUYUKI , FUKASAKU YOSHINORI , TAJIMA SUSUMU , INNAMI TOSHIYUKI , NISHIDATE KEISUKE
IPC分类号： F02D29/02 , B60K6/20 , B60K6/26 , B60K6/40 , B60K6/44 , B60K6/46 , B60K6/52 , B60K6/547 , B60K17/356 , B60L50/15 , B60L50/16 , B60W10/06 , B60W10/08 , B60W20/00 , F02D29/06 , H02K23/06 , H02P9/04 , H02P9/14 , H02P9/30 , B60L11/14 , B60K6/02
摘要： PROBLEM TO BE SOLVED: To provide generator for vehicle and a control method therefor where as full driving force performance as in mechanical 4WD is ensured over a wide driving range with respect to those with their wheels driven by motors. SOLUTION: The generator for vehicle driving gears is provided with a first generator, that is driven by the internal combustion engine of a vehicle and supplies the electrical loads of the vehicle with electric power and a motor that drives the front or rear wheels of the vehicle other than those driven by the internal combustion engine. The generator is further provided with a second generator, that is driven by the internal combustion engine and drives the motor and a controller that controls the second generator and the motor. The controller controls the output of the second generator according to the required driving force for the vehicle, and the motor has its driving force adjusted by the output of the second generator.

72. 发明专利

JP2001251815A COOLING STRUCTURE OF DIRECT-CURRENT MOTOR AND FRONT- AND REAR-SHEET-DRIVE VEHICLE USING THE SAME 失效
公开(公告)号：JP2001251815A
公开(公告)日：2001-09-14
申请号：JP2000061889
申请日：2000-03-02
申请人： HITACHI LTD
发明人： NISHIDATE KEISUKE , YAMAMOTO TATSUYUKI , FUKASAKU YOSHINORI , MASUNO KEIICHI , MAEDA YUJI , INNAMI TOSHIYUKI , SHIMIZU HISAYA , TAJIMA SUSUMU
IPC分类号： B60K1/00 , B60K11/06 , B60L50/16 , H02K5/18 , H02K9/28 , H02K13/00 , B60L11/14
摘要： PROBLEM TO BE SOLVED: To enhance cooling capability for the direct-current motor of a front- and rear-wheel-drive vehicle, where either of front and rear wheels are driven by an engine and the other are driven by the direct-current motor. SOLUTION: The holder plate in direct contact with a brush, that produces heat most in the direct-current motor for front- and rear-wheel drive vehicles is provided with fins. The fins are placed on the periphery of the direct-current motor, in such positions that the direction of the rotational shaft of the direct- current motor is parallel with the axles, so that wind hits at the fins, when the vehicle is being driven.

73. 发明专利

JP2001178198A GENERATOR 失效
公开(公告)号：JP2001178198A
公开(公告)日：2001-06-29
申请号：JP35603299
申请日：1999-12-15
申请人： HITACHI LTD
发明人： MASUNO KEIICHI , SHIMIZU HISAYA , YAMAMOTO TATSUYUKI , MAEDA YUJI , FUKASAKU YOSHINORI , TAJIMA SUSUMU , INNAMI TOSHIYUKI , NISHIDATE KEISUKE
IPC分类号： F02D29/02 , B60K6/20 , B60K6/26 , B60K6/46 , B60K6/485 , B60K6/52 , B60L50/16 , B60W10/08 , B60W20/00 , H02K19/22 , H02K21/04 , H02P9/30 , B60K6/02 , B60L11/14
摘要： PROBLEM TO BE SOLVED: To restrain generation of high voltage by controlling the voltage generated in a generator employing both field windings and permanent magnets together, and to prevent consumption of unnecessary drive by the permanent magnets, in the case that the electrical load on the generator is only a motor, and shortened service life of the motor caused by the current always passing through the motor. SOLUTION: An H-bridge 13 is disposed to set the field current of the field winding 12 in the generator 1 to a negative value. In the case of generating high voltage, polarity switching is conducted to set the field current to a negative value.

74. 发明专利

JPH03222834A BODY VIBRATION REDUCING METHOD AND DEVICE THEREOF 失效
公开(公告)号：JPH03222834A
公开(公告)日：1991-10-01
申请号：JP1634890
申请日：1990-01-27
申请人： HITACHI LTD , NISSAN MOTOR
发明人： MAEDA YUJI , NAKAMURA YOZO , NAKAMURA KENICHI , SAKAMOTO MASAHIDE , KADOMUKAI YUUZOU , FUKUSHIMA MASAO , MURAKAMI AKIRA
IPC分类号： F02D45/00 , B60K5/12 , F02B75/02 , F02D29/02 , F02D29/06 , F16F15/02 , G05D19/02 , H02P9/00
摘要： PURPOSE:To reduce a body vibration effectively by variably controlling the extent of load torque controlled variable in response to the rough degree and engine speed just before the rough occurrence, in a device which controls the load torque of electrical equipment for increment and reduces the body vibration due to a rough idle. CONSTITUTION:In this method, there are provided with a crank sensor 6, an engine speed take-in timing generator 7, a periodic measuring device 8, etc., and each output signal out of these elements is inputted into a microprocessing unit 3 in a control unit 1, then occurrence of a rough idle and its magnitude are detected hereat. At time of this rough idle occurrence, a load torque controlled variable (control pulse) of an alternator or electrical equipment turning to engine load, for checking the generation of engine vibration due to the rough idle is operated from the rough detected value and engine speed just before the rough occurrence, and a pressure-up circuit 9 is driven and controlled by this control pulse. After that, high voltage is impressed on a field coil of this alternator 10 via this pressure-up circuit 9, thereby absorbing the rough idle.

75. 发明专利

JPH0381544A METHOD AND APPARATUS FOR DETECTING COMBUSTION STATUS OF INTERNAL COMBUSTION ENGINE AND METHOD AND APPARATUS FOR CONTROLLING INTERNAL COMBUSTION ENGINE USING THE SAME 失效
公开(公告)号：JPH0381544A
公开(公告)日：1991-04-05
申请号：JP21736489
申请日：1989-08-25
申请人： HITACHI LTD
发明人： NAKAMURA KENICHI , NAKAMURA YOZO , MAEDA YUJI , NAGANO MASAMI , KADOMUKAI YUUZOU
IPC分类号： G01M15/04 , F02B75/02 , F02D41/14 , F02D41/22 , F02D45/00 , F02P5/15 , G01M15/11
摘要： PURPOSE:To accurately detect a combustion state by a method wherein when the combustion state is to be detected by monitoring a fluctuation in a crankshaft rotation as per cylinder, a degree of irregular combustion is determined according to an amount of a fluctuation in a rotation. CONSTITUTION:Pluses indicating explosion stroke are generated from a rotation number measuring block pulse generating unit A composed of a crank angle sensor housed in a distributor or the like, while block time of generated pulses is measured by a pulse width measuring unit B. The measured time is converted into a rotation speed in an arithmetic unit C, and by monitoring a fluctuation in a rotation of a crankshaft per cylinder, a control unit D detects an acceleration and combustion state of every cylinder from difference in acceleration. A degree of irregular combustion is determined at this time according to an amount of the fluctuation in rotation thereby controlling an ignition time and a fuel supply amount of each cylinder in an internal combustion engine accordingly. This control of the internal combustion engine can be accurately performed according to the combustion state.

76. 发明专利

JPH0315645A ENGINE CONTROL DEVICE 失效
公开(公告)号：JPH0315645A
公开(公告)日：1991-01-24
申请号：JP14841189
申请日：1989-06-13
申请人： HITACHI LTD
发明人： MAEDA YUJI , NAKAMURA YOZO , NAKAMURA KENICHI , NAGANO MASAMI
IPC分类号： F02B1/04 , F02B75/02 , F02D41/14 , F02D41/34 , F02D45/00 , F02P5/04 , F02P5/15 , F02P5/155
摘要： PURPOSE:To enable high precision control by sequentially detecting the rotational angular velocities of a crankshaft with each cylinder in a plurality of cylinders at the same predetermined stroke position, and calculating rotational speed data per each cylinder on the basis of the detected results. CONSTITUTION:During the operation of an engine 7, a control unit 15 operates and processes output signals from operation mode detecting sensors including an airflow meter 3, a crank angle sensor in a distributor 16, a throttle sensor 18 and the like. Then, the control unit 15 outputs each type of control signals, thereby driving and controlling a fuel injection valve 13 and an ignition coil 17. In this case, the rotational angular velocities of a crankshaft with each piston in a plurality of cylinders respectively at the same predetermined stroke position are independently detected in sequence for detecting an engine speed. Rotational speed data per cylinder is calculated on the basis of the detected results, and the calculated data is used to generate a control signal per cylinder.

77. 发明专利

JPS6490853A BRAKE DISTANCE INDICATOR 失效
公开(公告)号：JPS6490853A
公开(公告)日：1989-04-07
申请号：JP24787587
申请日：1987-10-02
申请人： HITACHI LTD
发明人： MAEDA YUJI , HORIKOSHI SHIGERU
IPC分类号： B60T8/58 , B60T8/00 , B60T8/172 , B60T8/1763 , B60T8/88
摘要： PURPOSE:To avoid collision upon emergency braking and to enable safe driving by operating a slip rate based on a wheel speed of driving wheels and a body speed then operating a body brake distance based on the slip rate and indicating the operation result on an indicator. CONSTITUTION:An optical or a radar doppler type body speed sensor 3 is fixed to the body 15 of an automobile and a wheel speed sensor 5 is fixed to a driving wheel 4. Furthermore, a torque detector 21 is provided and an output signal therefrom is fed together with output signals from the sensors 3, 5 to an arithmetic unit 1. The arithmetic unit 1 operates a slip rate based on the body speed signal and the wheel speed signal then estimates a drive torque T based on an output signal from the torque detector 21, thereafter estimates friction coefficient between the surface of road and tyre based on the slip rate and the driving torque. Then a brake distance is operated based on brake force or decelerating speed which are operated based on the friction coefficient or the driving torque, and indicated on an indicator 2.

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