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11. 发明专利

JPH06288290A ENGINE CONTROL DEVICE AND AIR FLOW METER USED THEREIN 失效
公开(公告)号：JPH06288290A
公开(公告)日：1994-10-11
申请号：JP8186993
申请日：1993-04-08
申请人： HITACHI LTD
发明人： NISHIMURA YUTAKA , SUGAYA ATSUSHI
IPC分类号： F02D11/10 , F02D41/18 , F02D41/24 , F02D45/00 , G01D3/02 , G01F1/696 , G01F1/698 , G01F1/72 , G01F25/00
摘要： PURPOSE:To obtain high measuring accuracy by simple matching when an air flow meter is connected to an engine control unit, and also correspond a renewal parts to the engine control unit easily even if the air flow meter is changed. CONSTITUTION:A memory means 4 having memorized the real air flow amount of an air flow meter 11, a data in relation to output characteristic or the correction data of air flow amount calculation is provided together with an electrical circuit 6 for measuring an air flow amount on the air flow meter 11 which is a part of the intake passage in an engine. In an engine control unit 7, the output signal of the air flow meter 11 is digital-calculated using an air flow amount read from the memory means 4 of an air flow meter body 11 side - output characteristic or an air flow amount correction data so as to find out a real air flow amount as the calculating data of a fuel supplying amount.

12. 发明专利

JPH0622470A SEMICONDUCTOR CHARGE CONTROLLER 失效
公开(公告)号：JPH0622470A
公开(公告)日：1994-01-28
申请号：JP17991992
申请日：1992-07-07
申请人： HITACHI LTD
发明人： SUGAYA ATSUSHI , MARUMOTO KATSUJI , MASUNO KEIICHI , MAEDA YUJI
IPC分类号： H02J7/24 , H02P9/30
摘要： PURPOSE:To provide a semiconductor charge controller adapted to be integrated with a small circuit scale to prevent a switching loss and an increase in an electromagnetic induction noise by temporarily enhancing a switching frequency due to switching noise and disturbance if a field current of a generator for a vehicle is PWM-controlled by a semiconductor power switching element. CONSTITUTION:The semiconductor charge controller comprises a latching circuit 1 to be operated by a basic pulse 1a of a PWM from a PWM generator 2 to limit a pulse change of the PWM for driving a field current controlling semiconductor power switch 52. Thus, an increase of the switching frequency to a PWM frequency or more is suppressed, and a switching loss of the switch due to a high speed switching and electromagnetic induction noise can be reduced.

13. 发明专利

JPH0477844B2 失效
公开(公告)号：JPH0477844B2
公开(公告)日：1992-12-09
申请号：JP19249483
申请日：1983-10-17
申请人： HITACHI LTD
发明人： SASAYAMA TAKAO , OBO SHIGERU , SUGAYA ATSUSHI , SHIBATA TAKANORI , ENDO AKIRA
IPC分类号： G01C19/00 , G01B9/02 , G01C19/64 , G01C19/72 , G01J3/45 , G02B6/44 , G02F1/125 , G02F1/225

14. 发明专利

JPH04197100A CURRENT CONTROL CIRCUIT FOR SEMICONDUCTOR POWER SWITCH AND GENERATOR CONTROL METHOD EMPLOYING THE CIRCUIT 失效
公开(公告)号：JPH04197100A
公开(公告)日：1992-07-16
申请号：JP32314290
申请日：1990-11-28
申请人： HITACHI LTD
发明人： SUGAYA ATSUSHI , MARUMOTO KATSUJI , MASUNO KEIICHI , MORI YUICHI
IPC分类号： G05F1/56 , G05F1/10 , H02J7/24 , H02P7/29 , H02P7/291 , H02P9/30 , H02P101/25 , H02P101/45 , H02P103/20
摘要： PURPOSE:To obtain a current control circuit for continuously controlling the load current of an inductive load regardless of the conducting/nonconducting state of a semiconductor power switch without requiring a special external component by providing means for holding a current detection value under conducting state of the semiconductor power switch and means for correcting thus held current value to a value under nonconducting state. CONSTITUTION:When current control is performed, e.g. a load current if is controlled continuously to a constant level, flywheel current if (off) at the time of turn OFF of a semiconductor power switch 1 is detected. In other words, an analog switch 9 is turned ON when a PWM output e0 is turned ON and a current detection voltage value VKK(on) is outputted, as it is, as a sample and hold voltage Vff(on) whereas when the PWM output e0 is turned OFF, the analog switch 9 is turned OFF and the final value of the current detection voltage value VKK(on) is sampled and held in a capacitor 10 and then it is outputted as a sample and hold voltage Vff(off). The sample and hold voltage Vff(off) is then reduced through a discharge circuit 17 thus producing an output waveform 106 equivalent to the load current if(off).

15. 发明专利

JPH03212200A GENERATOR CONTROLLER, CONTROL METHOD AND APPLICATION THEREOF ON VEHICLE GENERATOR CONTROLLER AND CONTROL METHOD 失效
公开(公告)号：JPH03212200A
公开(公告)日：1991-09-17
申请号：JP612390
申请日：1990-01-17
申请人： HITACHI LTD
发明人： MARUMOTO KATSUJI , MIYASHITA KUNIO , TAWARA KAZUO , MASUNO KEIICHI , SUGAYA ATSUSHI , SAITO AKIHIRO
IPC分类号： H02J7/14 , H02J7/24 , H02P9/30
摘要： PURPOSE:To control generator output according to demand of the load over a wide range by determining a current command value, to be fed to a field winding, based on a signal corresponding to a differential voltage signal and a current actually flowing through the field winding, and then feeding a current to the field winding based on thus determined command value. CONSTITUTION:A field winding current command value generating means A generates a field current command value epsilon1 based on a signal Ifo, corresponding to a voltage difference epsilon2 between a battery 6 voltage and a predetermined set voltage, and a signal Iff provided from a field current signal generating means B, and then a field winding current supply means C supplies a predetermined current to a field winding 2 based on thus generated current command value epsilon1. Consequently, when a load connected to the battery 6 is thrown in to cause battery 6 voltage to drop, the current command value epsilon1 increases correspondingly thus increasing field winding current iCH. As a result, output of a generator 1 increases and the battery 6 is charged upto a predetermined voltage.

16. 发明专利

JPS6455066A VOLTAGE CONTROL POWER IC 失效
公开(公告)号：JPS6455066A
公开(公告)日：1989-03-02
申请号：JP21010387
申请日：1987-08-26
申请人： HITACHI LTD
发明人： IBAMOTO MASAHIKO , SUGAYA ATSUSHI , SUZUKI MASAYOSHI , TANAKA TOMOYUKI
IPC分类号： H02H3/027 , H02M1/08 , H02M1/32
摘要： PURPOSE:To improve functions of an automobile electrical equipment system by adding a timer, a conduction ratio controller, an operating conditions setter and others to a power IC logic part. CONSTITUTION:An N-type MOS switch 1 is a power transistor formed on a silicon chip 2, and a drain D is connected with the plus side of a battery voltage and a source S, with the load side thereof. Said switch 1 is also composed of a gate circuit 3, a charge pump 4, an oscillator 5, various protection circuits 7-9, a diagnosis circuit 12, a voltage detection circuit 13 and others. In this case, there are provided a timer, a conduction ratio control circuit 14, and an operating conditions setter 15. Said operating conditions setter 15 not only sets a period and pattern repeatedly for the timer 6 according to a signal from the outside given to an input terminal 17 but also sets a conduction ratio for the conduction ratio controller 14 and gives, as occasion demands, a command for constant-current control or a command for constant-voltage control.

17. 发明专利

JPS5858801A RETREAT DETECTING SYSTEM FOR INDUCTION MOTOR TYPE ELECTRIC MOTOR VEHICLE 失效
公开(公告)号：JPS5858801A
公开(公告)日：1983-04-07
申请号：JP15368181
申请日：1981-09-30
申请人： HITACHI LTD
发明人： IBAMOTO MASAHIKO , TANAMACHI TOKUNOSUKE , SUGAYA ATSUSHI , OKAMATSU SHIGETOSHI , JINBO YOSHIJI
IPC分类号： B60L3/00 , B60L9/18
摘要： PURPOSE:To enable to detect the reversely rotating state of an induction motor without providing a rotating direction discriminating pulse generator by detecting the reversely rotating state of the motor by measuring and judging the internal impedance of the motor. CONSTITUTION:A deviation signal between a signal fi obtained by adding a slip frequency fa to a rotor frequency fr, a current instructing value IP and a motor current IM is applied to the frequency control input 5 and the voltage control input 6 of a modulator 4 for controlling an inverter 2. Further, the deviation between a voltage command VP obtained by converting the signal fi via a f/V converter 12 and a motor voltage is applied to a voltage limiting input 7. A pattern generator 10 outputs a signal responsive to the command VP, and a comparator 11 outputs a reverse rotation signal when the output signal of the generator 10 becomes larger than the motor voltage VM.

18. 发明专利

JP2006307863A Engine control unit 有权
标题翻译：发动机控制单元
公开(公告)号：JP2006307863A
公开(公告)日：2006-11-09
申请号：JP2006160867
申请日：2006-06-09
申请人： Hitachi Car Eng Co Ltd , Hitachi Ltd , 株式会社日立カーエンジニアリング , 株式会社日立製作所
发明人： IGARASHI SHINYA , SUGAYA ATSUSHI , MINAMITANI RINTARO , NAKADA KEIICHI , WATANABE IZUMI
IPC分类号： F02D45/00 , G01F1/68 , G01F1/698
摘要： PROBLEM TO BE SOLVED: To provide an air-flow rate measuring device which minimizes the influence of matters attaching onto an exothermic resistor or the like, during stoppage of an engine so as to improve the measurement accuracy. SOLUTION: A flow rate of air sucked into the internal combustion engine is detected by using the exothermic resistor 1. After the internal combustion engine is stopped, a power management circuit 4 keeps the temperature of the exothermic resistor 1, at a level equal to or higher than the same during driving the internal combustion engine, until the temperatures of devices mounted on the internal combustion engine and an intake air system thereof become equal to or lower than the temperature, at which a volatile gas, such as oil vapor, is generated. The power management circuit 4 detects the air temperature by a heat-sensitive resistor 2 for detecting the temperature of the air sucked into the internal combustion engine. Based on the detected temperature, the power management circuit also keeps the temperature of the exothermic resistor at a level equal to or higher than the same during driving the internal combustion engine, after the stoppage of the internal combustion engine. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种使发动机停止期间附着在放热电阻器等上的物质的影响最小化的空气流量测量装置，以提高测量精度。解决方案：通过使用放热电阻器1检测吸入内燃机的空气的流量。在内燃机停止之后，电力管理电路4将放热电阻器1的温度保持在一定水平在内燃机的驱动期间等于或高于相同，直到安装在内燃机上的装置及其进气系统的温度变得等于或低于挥发性气体，例如油蒸汽，被生成。电力管理电路4通过用于检测吸入内燃机的空气的温度的热敏电阻器2来检测空气温度。基于检测到的温度，在内燃机停止之后，功率管理电路还在驱动内燃机期间将放热电阻器的温度保持在等于或高于其的水平。版权所有（C）2007，JPO＆INPIT

19. 发明专利

JP2006090830A Heating resistor type flow measurement apparatus and control system using it 有权
标题翻译：加热电阻式流量测量装置和使用它的控制系统
公开(公告)号：JP2006090830A
公开(公告)日：2006-04-06
申请号：JP2004276484
申请日：2004-09-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： IGARASHI SHINYA , SUGAYA ATSUSHI , KOBAYASHI CHIHIRO
IPC分类号： G01F1/696 , F02D41/04 , F02D45/00
摘要： PROBLEM TO BE SOLVED: To achieve a heating resistor type flow measurement apparatus which can reduce minus flow measurement errors when a fluid to be measured pulses caused by the nonlinearity and delay in response of output voltage characteristics. SOLUTION: An output voltage V1 in accordance with a heating current passing through a heating resistor 3 in an air passage 4 is output from a drive circuit section 1a. The output voltage V1 is supplied to a flow signal value conversion section 1b, is converted into a second output voltage V2 to be an inverted nonlinear characteristic curve, and is supplied, as an air flow signal, to an input circuit 2a of an engine control unit 2. An engine throttle valve opening signal TV and an engine rpm signal Ne are also supplied to the input circuit 2a and are converted into digital signals to be supplied to a CPU 2b. The CPU 2b, on the basis of the air flow signal Q, the throttle valve opening signal TV, and the engine rpm signal Ne, calculates a fuel injection amount to be supplied to an injector. The fuel injection amount is supplied, as a fuel injection amount signal Tp, to the injector from the CPU 2b through an output circuit 2c. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：实现一种加热电阻器型流量测量装置，其可以在由输出电压特性响应的非线性和延迟引起的待测流体脉冲时减小负流量测量误差。解决方案：从驱动电路部分1a输出根据通过空气通道4中的加热电阻器3的加热电流的输出电压V1。输出电压V1被提供给流量信号值转换部分1b，被转换为第二输出电压V2作为反相非线性特性曲线，并作为空气流量信号被提供给发动机控制器的输入电路2a 发动机节气门打开信号TV和发动机转速信号Ne也被提供给输入电路2a，并被转换成数字信号以提供给CPU 2b。 CPU 2b基于空气流量信号Q，节流阀开启信号TV和发动机转速信号Ne计算要供给到喷射器的燃料喷射量。燃料喷射量作为燃料喷射量信号Tp通过输出电路2c从CPU 2b供给到喷射器。版权所有（C）2006，JPO＆NCIPI

20. 发明专利

JP2000356539A THERMAL TYPE AIR FLOWMETER 失效
公开(公告)号：JP2000356539A
公开(公告)日：2000-12-26
申请号：JP16929299
申请日：1999-06-16
申请人： HITACHI LTD
发明人： SUGAYA ATSUSHI , OTA KENJI
IPC分类号： G01P5/12 , F02D45/00 , G01F1/68 , G01F1/698
摘要： PROBLEM TO BE SOLVED: To reduce exhaust gas when an engine is started by improving response in the case of the rising of air flow rate when a power is turned on and by rapidly measuring the air flow rate when the engine of an automobile is started even in the case of a thermal type air flowmeter using a heat generation resistor especially with a large heat capacity. SOLUTION: A bridge circuit means for composing a constant-temperature drive circuit by a heat generation resistor 11 and a temperature-compensating resistor 12, and a switch circuit means for applying a 12 V battery voltage and a voltage that differs from the 12 V battery voltage to the bridge circuit are provided, and a voltage that is higher than the battery voltage is applied to a bridge circuit, thus increasing the response of a sensor when the power is turned on even if the heat capacity of the heat generation resistor 11 is large.

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