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1. 发明专利

JP2001214776A AUTOMOTIVE CONTROL DEVICE 失效
公开(公告)号：JP2001214776A
公开(公告)日：2001-08-10
申请号：JP2000032650
申请日：2000-02-03
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： MATSUMURA TAKASHI , MIYAZAKI ATSUSHI , SASAKI SHOJI , ZAITSU MASAHIRO , WATABE MITSURU , ASANO MASAHIKO
IPC分类号： F02D35/00
摘要： PROBLEM TO BE SOLVED: To mount a pressure sensor on the inner part of the sealed case of an automotive control device without loosing the function of pressure measurement. SOLUTION: An engine control circuit board 15 and the pressure sensor 20 are housed in one control unit case (for example, ECU case) 11. The ECU case 11 (or the cover thereof) comprises a hole 18 for guiding a pressure to be detected. The pressure sensor 20 has a sensor case 22 for housing a gauge chip 21, and installed in the ECU case 11 together with the sensor case 22. The gauge chip 21 is opposed to the hole 18. The sensor case 22 is adhered to the inside of the ECU case 11 or the cover thereof so as to interrupt the hole 18 from the inner part of the ECU case 11. A cover 14 is also adhered to the ECU case.

2. 发明专利

JP2001051023A ENGINE CONTROL APPARATUS 失效
公开(公告)号：JP2001051023A
公开(公告)日：2001-02-23
申请号：JP22844499
申请日：1999-08-12
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： MIYASHITA KIMIO , NAKAZURU KUNIHITO , ZAITSU MASAHIRO , ONO KOICHI
IPC分类号： F02D45/00 , G01R31/26 , G01R31/28
摘要： PROBLEM TO BE SOLVED: To provide an engine control apparatus provided with an output- voltage adjusting circuit which screens a semiconductor integrated circuit mounted on a circuit board in a bare chip state, which reduces the mounting size, which enhances the electric characteristic and whose production costs can be reduced or the like, with a simple constitution. SOLUTION: This engine control apparatus 107 is provided with the control device of integrated circuits 112, 113 such as processor modules or the like used to compute a control program. The engine control apparatus is provided with output-voltage adjusting circuits 150, 150a which change over a rated voltage used to screen the integrated circuits. The output-voltage adjusting circuits are formed in such a way that a plurality of resistors are installed across a power-supply line on the output side of the rated voltage and the side of a ground.

3. 发明专利

JPH07293403A SENSOR INTEGRAL ENGINE CONTROLLER 失效
公开(公告)号：JPH07293403A
公开(公告)日：1995-11-07
申请号：JP9218794
申请日：1994-04-28
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： KASHIMURA YUICHI , SASAKI SHOJI , NAKAZURU KUNIHITO , ZAITSU MASAHIRO
IPC分类号： F02P11/00 , F02D35/00 , F02D41/18 , F02D41/22 , F02M35/10 , F02M69/48 , F02P5/15
摘要： PURPOSE:To miniaturize an intake air quantity sensor integrated type engine controller, and enhance reliability thereof. CONSTITUTION:A storage part 35 covered with a cover 34 is formed in the body wall 33 of the intake passage 3 of an engine, and the sensor unit 3A of an air flow quantity meter is inserted to be freely attached/detached to/form the intake passage 3 from the radial direction of the passage through the storage part 35. The output circuit 38 of the air flow quantity meter and an engine control unit 30 to generate the control signal of the engine based on an output signal, from the output circuit 38 are storaged in the circuit substrate 29 of the storage part 35. Hereby, the installation structure of the sensor and a wiring substrate is simplified so as to miniaturize the engine controller and enhance reliability thereof.

4. 发明专利

JPH07293239A CRANK ANGLE SENSOR INTEGRATED TYPE ENGINE CONTROLLER 失效
公开(公告)号：JPH07293239A
公开(公告)日：1995-11-07
申请号：JP9218894
申请日：1994-04-28
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： NAKAZURU KUNIHITO , SASAKI SHOJI , KASHIMURA YUICHI , ZAITSU MASAHIRO
IPC分类号： F02P7/067 , F01P1/06 , F02D35/00 , F02D41/22 , F02P11/00 , F02P15/00
摘要： PURPOSE:To improve an antinoise property and reliability and enable the display of the necessary lowest limit function even if an engine control unit is failured in a sensor integrated type engine controller. CONSTITUTION:An engine control unit 30 is provided on the same base plate as that of a crank angle sensor 26 disposed in an engine room. A failure detecting circuit and back-up circuit in the failure of the engine control unit 30 together with a power transistor circuit for driving an injector 70 and ignition system are built in an actuator of the engine, for example, the injector 70 and ignition system. When a crank angle sensor 26 united with engine control unit 30 is mounted on the base plate, about several mms of length of a conductor between both will do. Thus, the control of the engine is hardly influenced by the engine ignition noise mixed from this short conductor to provide the engine control device excellent in anti-noise property. The function of the engine control unit can be backed up by the respective actuators of the engine.

5. 发明专利

JPH0579397A CAR CONTROL DEVICE 失效
公开(公告)号：JPH0579397A
公开(公告)日：1993-03-30
申请号：JP23928691
申请日：1991-09-19
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： ZAITSU MASAHIRO , SHIDA MASAMI
IPC分类号： F02D45/00
摘要： PURPOSE:To prevent any mis-writing caused by the instant drop of a battery voltage and a sudden noise and the like occurred during EEPROM writing by providing a EEPROM in a serial data transmission type and a battery backup RAM, in a car control device providing CPU. CONSTITUTION:During engine running, the most favorable fuel injection amount and an ignition timing and the like are calculated based on an engine running status and a control parameter is studyed by an aging change, a solid difference and the like so as to memorize to EEPROM 1 in CPU2. Meantime, when the control parameter is written in EEPROM 1, a written data and address are firstly stored in a battery backup RAM 4 temporarily and a written flag is set. Then, the data is written in EEPROM 1 and also whether its written in operation is finished or not is judged and after finish judging, the data is read out from the written same address. The content of EEPROM 1 is compared with the content of the battery backup RAM 4 and its process is finished in the case of the same each other.

6. 发明专利

JPH05225049A CONTROLLER 失效
公开(公告)号：JPH05225049A
公开(公告)日：1993-09-03
申请号：JP2499392
申请日：1992-02-12
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： MIYADACHI TAKAYUKI , SHIDA MASAMI , ZAITSU MASAHIRO
IPC分类号： F02D45/00 , G06F12/06
摘要： PURPOSE:To shorten the transfer time of control data and to shorten the program processing time by reading in data from an EEPROM to write it in a RAM by a CPU. CONSTITUTION:When a program is reset and is started, control data is written in a RAM 5 from a serial communication system EEPROM 7, and a CPU 3 executes the program; and if control data is required, the CPU 3 reads in control data from the RAM 5 to perform the processing of the program. Control data obtained by execution of the program is written in the EEPROM 7 and the RAM 5. Therefore, the CPU 1 can read in control data from the RAM 5 when the program is reset and is started to write control data in the RAM 5 from the serial communication system EEPROM 7. Since a learnt value is written in the RAM 5 as well as the EEPROM 7 in this case, it can be sent from the EEPROM 7 to the RAM 5 at the time of reset start.

7. 发明专利

JPH0579379A CONTROL METHOD 失效
公开(公告)号：JPH0579379A
公开(公告)日：1993-03-30
申请号：JP23927491
申请日：1991-09-19
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： EBATA KOJI , SHIDA MASAMI , HASUNUMA TAKASHI , ZAITSU MASAHIRO
IPC分类号： F02D41/14
摘要： PURPOSE:To control learning with a new learned parameter at the time of breaking of back up power supply by writing every parameter learned every constant period of time into an EEPROM, in an engine control system provided with a back up RAM and the EEPROM. CONSTITUTION:In an engine control device, a input signals from various kinds of sensors and switches are taken in a microcomputer 2, and a fuel injection amount, an ignition timing, and the like are calculated in a CPU 3, and also learned parameters which are obtained thereby are stored at any time into a back up RAM 4 which is connected to the CPU 3 by a parallel communication system. The back up RAM 4 is connected to an EEPROM 5 through a serial communication system, and the learned parameters are transferred from the back up RAM 4 to the EEPROM 5 every constant period of time. At this time, the times of writing into the EEPROM 5 is counted, and writing the times into the EEPROM 5 is prohibited when it reaches a guaranteed writing times. It is thus possible to prevent any trouble caused by any excessive times of writing.

8. 发明专利

JPH06102283A ABNORMALITY DETECTOR FOR ENGINE 失效
公开(公告)号：JPH06102283A
公开(公告)日：1994-04-15
申请号：JP24952392
申请日：1992-09-18
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： KATOUGI KOUZOU , SANO YUKINORI , IKEDA YUJI , KAWATSU MASAYOSHI , NAGAOKA HARUHIKO , ZAITSU MASAHIRO
IPC分类号： G01M15/04 , G01M15/00 , G01P3/42 , G01P3/44
摘要： PURPOSE:To detect abnormality in an engine by fixing a position sensor in the vicinity of a ring gear thereby detecting fluctuation in the rotation of the ring gear. CONSTITUTION:A position sensor is fixed in the vicinity of a ring gear and detects fluctuation of magnetic flux, caused by the crests and roots of the gear thus producing a periodic voltage output. Output from the position sensor is fed to a shaping circuit in an engine control unit where it is converted into a square wave. A position counter counts the signal from the position sensor while a timer determines a time difference T1 between start and end of time measurement for each cylinder thus calculating the fluctuation in the number of revolutions accompanied with combustion of each cylinder. Fluctuation dx of the number of revolution is then compared with a predetermined misfire decision value and an alarm is produced if the predetermined value is exceeded. Time T2 corresponding to the ridge of the position sensor signal is also measured and a decision is made that a gear is missing if T2 is shifted more than a predetermined value from a time T1 corresponding to the valley of the position sensor signal. Furthermore, the position sensor signal is passed to a differentiating circuit in order to measure a time interval corresponding to the flank of the gear and abrasion/deformation of gear is alarmed if the difference between rising time T3 and falling time T4 exceeds a predetermined value.

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