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21. 发明专利

JPH03156262A AIR CONDITIONER FOR AUTOMOBILE 失效
公开(公告)号：JPH03156262A
公开(公告)日：1991-07-04
申请号：JP29127789
申请日：1989-11-10
申请人： HITACHI LTD
发明人： OTSU HIDEKAZU
IPC分类号： F25B27/00 , B60H1/32 , F04B49/10 , F25B49/02
摘要： PURPOSE:To secure given performance even though any communication failure is produced among control circuits by controlling the operation of a compressor by judging whether or not the compressor should be interrupted by the control circuits on the basis of two types or more of detection signals from a freezing device, an engine, and an engine control device. CONSTITUTION:An engine control device 3 controls an air conditioner relay 43 supplying a power supply voltage to a magnet clutch 13 for intermittently operating a compressor 10. The air conditioner relay 43 is controlled to its on-state when communication between that and control circuit part 2 is normally effected and it receives an on-command from the control circuit part 2. Even though there is produced any communication failure between the air conditioner control device 2 and the engine control device 3, the failure of the air conditioner control device 2 can be detected and a magnet clutch 13 is turned off, so that an evaporator 9 can be prevented from being frozen. Further, the engine control device 3 and the control circuit part 2 are connected through an SCI terminal for communication of blow-off temperature and sensor temperature therebetween, and further a trouble shooting apparatus 42 is connected to a communication line 41 for communication of information.

22. 发明专利

JPH0379425A AIR CONDITIONING DEVICE FOR AUTOMOBILE 失效
公开(公告)号：JPH0379425A
公开(公告)日：1991-04-04
申请号：JP21292189
申请日：1989-08-21
申请人： HITACHI LTD
发明人： OTSU HIDEKAZU , KITAHARA YUICHI
IPC分类号： B60H1/32
摘要： PURPOSE:To stabilize rotational speed of an engine in idling state, in a system in which air temperature in a downstream of an evaporator is controlled to a set point of temperature through controlling a capacity of a compressor, by shifting the set point of temperature toward high temperature side when a rotational speed of the engine detected by a sensor is lower than a required value. CONSTITUTION:Air introduced into a duct of a temperature regulating device 1 by rotation of a fan 5 is cooled by using an evaporator 9. After that, the air is mixed with air heated during passing through a heater 15. The heated air is drawn into a car room from arbitrary blow out ports 18 to 20 as the air for air conditioning. Because cooling ability of the evaporator 9 is regulated by electric current fed to a control valve 11 contained in a compressor 10, air temperature in a downstream of the evaporator 9 is regulated so as to be a set point of air temperature. In this case, when a rotational speed detected by a rotational speed sensor 39 is lower than a required value, a control circuit portion 2 for controlling the control valve 11 and the like shifts the set point of air temperature in the downstream toward high temperature side.

23. 发明专利

JPH02241819A AIR CONDITIONER FOR AUTOMOBILE AND CONTROL METHOD THEREOF, CONTROL DEVICE, AND MICROCHIP FOR CONTROL 失效
公开(公告)号：JPH02241819A
公开(公告)日：1990-09-26
申请号：JP5969189
申请日：1989-03-14
申请人： HITACHI LTD
发明人： OTSU HIDEKAZU
IPC分类号： B60H3/00 , B60H1/32
摘要： PURPOSE:To make moderate dehumidification, and ensure and a good forward view field, by controlling the outlet air temperature of an evaporator nearly lower than the freezing limit, when an outside air temperature is low, and are liable to take place freezing of an evaporator and/or cloud of a window. CONSTITUTION:In the inlet of a compressor 6 for compressing refrigerant evaporated by an evaporator 3, a control valve 10 serving as an ejection amount adjusting device is arranged. Between a condenser 7 which converts a high temperature and high pressure refrigerant compressed by the compressor 6 to liquefied refrigerant, and a fan 8 for blowing cooling air, a shutter 11 serving as a radiating amount adjusting device is arranged. In this occasion, when the detected value of an inlet air temperature sensor 16 in the evaporator 3 is less than a set value, the control valve 10 is opening/closing controlled by a control circuit 13 so that the detected value of an outlet air temperature sensor 17 may become an approximate value below the freezing limit temperature in the evaporator 3 which is lower than a set value.

24. 发明专利

JPH01278828A AUTOMOBILE AIR-CONDITIONING DEVICE 失效
公开(公告)号：JPH01278828A
公开(公告)日：1989-11-09
申请号：JP10761888
申请日：1988-05-02
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： FUNAZAKI KEN , IIJIMA TOSHIKI , HAYASHIBARA TOSHIO , OKADA TSUGUHIRO , OTSU HIDEKAZU , KUBOTA MASANORI
IPC分类号： B60H1/32
摘要： PURPOSE:To make it possible to give the driver a guide line concerning the change-over between A/C mode and ECONO mode by computing and displaying a ratio between turn-on and -off of a compressor in a predetermined time. CONSTITUTION:A compressor is turned on and off by a temperature sensing element or a thermostat in an evaporator so as to control the temperature of the evaporator or to prevent the evaporator from being frozen. In this arrangement, a microcomputer 32 computes a ratio between turn-on and -off of the compressor in a predetermined time and displays the same on a panel 30 in a bar graph pattern. As a result, the drive may visually confirm the operating condition of the compressor so as to obtain a guide line for selecting A/C mode or ECONO (economy) mode.

25. 发明专利

JPS6390424A CLOUDINESS PREVENTING DEVICE FOR AUTOMOBILE 失效
公开(公告)号：JPS6390424A
公开(公告)日：1988-04-21
申请号：JP23455086
申请日：1986-10-03
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： OTSU HIDEKAZU , OKADA TSUGUHIRO , SHIMIZU SHUICHI
IPC分类号： B60H1/00 , B60H3/00 , B60H3/02
摘要： PURPOSE:To improve a cloudiness preventing effect at the time of accelerating by providing a means of detecting the acceleration of an automobile and increasing the capacity of a dewing preventing means in accordance with the detected acceleration. CONSTITUTION:An inside air temp. TR detected by an automobile room inside air temp. sensor 1 and an inside air humidity detected by a sensor 2 are sent to a humid air chart converting part 4 to obtain a dew-point temp. TD, and the difference DELTATW between the dew-point temp. TD and a glass inner-face temp. TW is obtained by a subtraction pat 6. On the other hand, the difference DELTATR between the temp. TR and an outside air temp. TA detected by a sensor 7 is obtained, and the product of acceleration detected by a sensor 9 and the temp. difference DELTATR is calculated by a multiplication part 10 to obtain a correcting quantity alpha. And, a cloudiness preventing means 12 is controlled based on this value alpha and said value DELTATW and, when reduction in glass temp. due to acceleration is foreseen, the control of cloudiness prevention is enhanced. Thereby, the cloudiness prevention control can be carried out earlier, securing a favorable visibility.

26. 发明专利

JP2003199208A CONTROL DEVICE FOR HYBRID VEHICLE 审中-公开
公开(公告)号：JP2003199208A
公开(公告)日：2003-07-11
申请号：JP2001391371
申请日：2001-12-25
申请人： HITACHI LTD
发明人： OTSU HIDEKAZU , GOTO HIROO
IPC分类号： F01N3/00 , B60K6/20 , B60K6/485 , B60K6/54 , B60K6/547 , B60L50/16 , B60W10/08 , B60W20/00 , F01N3/24 , F02D29/02 , B60L11/14 , B60K6/02
摘要： PROBLEM TO BE SOLVED: To improve exhaust performance by controlling an acceleration assist amount by an electric machine according to the state of a catalyst. SOLUTION: The activating condition of the catalyst 20 that purifies the exhaust gas of an engine is detected from the temperature of engine cooling water, and the acceleration assist amount by a motor generator 2 relative to an acceleration operation amount is increased as the activating condition of the catalyst 20 is lowered. When the charge of a battery 32 becomes low, the acceleration assist amount by the motor generator 2 is restricted. COPYRIGHT: (C)2003,JPO

27. 发明专利

JPH08336299A CONTROLLER AND CONTROL METHOD FOR ELECTRIC VEHICLE 失效
公开(公告)号：JPH08336299A
公开(公告)日：1996-12-17
申请号：JP14206995
申请日：1995-06-08
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： OBARA SANSHIRO , YAMADA HIROYUKI , OTSU HIDEKAZU
IPC分类号： B60L3/00 , H02P21/00 , H02P21/22 , H02P21/36 , H02P23/16 , H02P27/04 , H02P27/06 , H02P27/08 , H02P7/63
摘要： PURPOSE: To obtain a controller for electric vehicle provided with a plurality of encoders in which a motor is controlled based on the output from a normal encoder, if any, when the plurality of encoders produce different outputs. CONSTITUTION: The controller for electric vehicle comprises a detector 50 for detecting the abnormality of encoder by comparing the outputs N1 , N2 from a pair of encoders, and a processing section 60 for deciding whether each encoder is normal or not by comparing the output from each encoder with the output Vs from a vehicle speed sensor. When any encoder is abnormal, the torque of a motor 2 is controlled based on the output from an encoder which is decided to be normal. More specifically, when a part of a plurality of encoders has failed, a decision is made correctly which encoder is faulty and the motor is controlled based on the output of a normal encoder thus running an electric vehicle continuously.

28. 发明专利

JPH08313548A DEVICE FOR DETECTING SPEED OF MOTOR 失效
公开(公告)号：JPH08313548A
公开(公告)日：1996-11-29
申请号：JP12109895
申请日：1995-05-19
申请人： HITACHI LTD
发明人： TAKAMOTO YUSUKE , MASAKI RYOZO , WATANABE MASAHIKO , OTSU HIDEKAZU
IPC分类号： G01P3/489
摘要： PURPOSE: To provide a speed detecting device the circuit of which can be reduced in size and which can eliminate the error of motor speed calculated values even when the data of a counter and register are updated while the data are fetched. CONSTITUTION: A microcomputer 1 is incorporated with a first counter 2, second counter 3, and register 4 which keeps the output value of the second counter 3. A pulse generator 5 generates a pulse train of a frequency proportional to the rotating speed of a motor 6. The first counter 2 counts the output pulse mpls of the generator 5 and the second counter 3 counts the internal clock of the microcomputer 1. The count value of the second counter 3 is latched to the register 4 at the leading and trailing edges of the output pulse mpls of the pulse generator 5.

29. 发明专利

JPH08214402A PROTECTIVE DEVICE AND CONTROL METHOD OF MOTOR CAR 失效
公开(公告)号：JPH08214402A
公开(公告)日：1996-08-20
申请号：JP1665595
申请日：1995-02-03
申请人： HITACHI LTD , HITACHI CAR ENGINEERING KK
发明人： OTSU HIDEKAZU , NAITO SHOTARO , MATSUDAIRA NOBUNORI , OBARA SANSHIRO , YOSHIHARA SHIGEYUKI , YAMADA HIROYUKI
IPC分类号： B60L3/00 , B60L9/18
摘要： PURPOSE: To provide a protective device capable of preventing failure owing to the erroneous control of a driving motor and an inverter owing to the disconnection of a temperature sensor in a motor car by deciding the disconnection of the temperature sensor without mounting a circuit for detecting the disconnection. CONSTITUTION: A protective device for a motor car has a signal generating means 5 for receiving the command value of a torque command means 1 and generating a control signal, an inverter 6 for receiving the signal of the signal generating means and driving a motor 3, and temperature detecting means 8-11, 16 for detecting the temperatures of the motor and the inverter, and the signal generating means is controlled in response to outputs from the temperature detecting means and the motor and the inverter are protected so as not to reach a high temperature. A motor- temperature sensor short-circuit disconnection decision section 5A and an inverter- temperature sensor short-circuit disconnection decision section 5B are provided, the temperature detecting means under the state of a short circuit and disconnection are decided, when outputs from the temperature detecting means reach a set value or more at a high temperature, where normal operation cannot reach, and a temporary value is substituted for outputs from the temperature detecting means.

30. 发明专利

JPH0438219A AIR CONDITIONER FOR CAR 失效
公开(公告)号：JPH0438219A
公开(公告)日：1992-02-07
申请号：JP13821690
申请日：1990-05-30
申请人： HITACHI LTD
发明人： OTSU HIDEKAZU
IPC分类号： B60H1/00 , F24F11/02
摘要： PURPOSE:To improve quick responsiveness of a car room inside blowoff temperature under the condition that clouding of a window glass or a white smoke of car room inside blowoff air is not generated by heightening the upper limit of a target temperature rise speed as a heating amount of a heating unit of evaporator downstream air comes to be larger. CONSTITUTION:An electronic controller 2 for air conditioning controls a heat exchanger 1 so that a car room is to be at a target temperature given by a volume 21. And an electronic controller 4 for a compressor controls a magnet clutch 31 and a control valve coil 32 of the compressor 3 in accordance with an information received from the electronic controller 2 for air conditioning, a detected value of an inlet temperature sensor 28 of an evaporator 12, a detected value of an outlet air temperature sensor 29 and a detected value of a rotation speed sensor 30. In this case, the above controller 2 heightens the upper limit of target temperature rise speed as the heating amount of a heater 16 to heat air in the downstream of the evaporator 12 becomes larger.

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