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1. 发明专利

JPH03103653A CONTROL SYSTEM FOR CONTINUOUSLY VARIABLE TRANSMISSION FOR AUTOMOBILE 失效
公开(公告)号：JPH03103653A
公开(公告)日：1991-04-30
申请号：JP23568289
申请日：1989-09-13
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： HASEGAWA AKIRA , SATO KAZUHIKO , HORIUCHI MICHIMASA
IPC分类号： F16H9/00 , F16H59/40 , F16H59/42 , F16H59/70 , F16H61/00 , F16H61/02 , F16H63/46
摘要： PURPOSE:To perform high-precise continuously variable shift by a method wherein when a moving amount is controlled through detection of the moving position of either of the pulleys of a continuously variable transmission, the hysteresis characteristics of a pulley position detecting value is corrected. CONSTITUTION:By means of a pulley position control output signal from a control part 10, a motor 4a causes rotation of a pulley press plate 4c, a pulley 40 on the drive side is displaced along a drive shaft 43, and a continuously variable transmission 4 is shifted. Since a change gear ratio is detected by a pulley position sensor 21 but the hysteresis thereof is corrected, correction is made from a ratio between the numbers of revolutions of pulleys 40 and 41 on the drive side and the driven side detected by electromagnetic pickup sensors 17 and 16 and the direction of the pulley position control output signal. Since a place where the direction of a change in a pulley position is changed is an insensitive zone to a sensor signal, a ratio between the numbers of revolutions of the pulleys detected by the sensors 16 and 17 is used as a change gear ratio in the insensitive zone. Even when a belt slip occurs, continuity is provided, and through correction of a hysteresis, high-precise control is practicable.

2. 发明专利

JPH03325A TROUBLESHOOTING SYSTEM OF ELECTROMAGNETIC CLUTCH 失效
公开(公告)号：JPH03325A
公开(公告)日：1991-01-07
申请号：JP13264089
申请日：1989-05-29
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： HORIUCHI MICHIMASA , SATO KAZUHIKO , HASEGAWA AKIRA
IPC分类号： F16D48/06
摘要： PURPOSE:To troubleshoot an electromagnetic clutch to protect a driving circuit by connecting a resistor to the one terminal of the electromagnetic clutch through a switch means connected to a power supply and detecting current flown when a semi-conductor element and the switch means are turned on. CONSTITUTION:A transistor T5 and resistance R are used to form a circuit for troubleshooting a clutch 2. When the transistor T5 is turned on and off at regular intervals to flow base current IB5 with a base current IB4 flown into a transistor T4, the slant-lined part of a clutch current Ic is flown into a current detector SH. When a clutch coil 2a is short-circuited, current does not flow into the current detector SH and the voltage VSH detected by a control unit 13 becomes zero. Also, when brushes 2b and 2c are dropped off, the voltage VSH becomes zero. In addition, when contact of the brushes 2b and 2c becomes poor, the dummy internal resistance of the clutch coil 2a becomes large and the voltage VSH becomes small as compared with a normal value. By this, semiconductor elements can be protected by making troubleshooting operation.

3. 发明专利

JPH02267032A CONTROL METHOD OF NON-STAGE TRANSMISSION FOR VEHICLE 失效
公开(公告)号：JPH02267032A
公开(公告)日：1990-10-31
申请号：JP8682289
申请日：1989-04-07
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： HORIUCHI MICHIMASA , SATO KAZUHIKO , HASEGAWA AKIRA , SUGIMOTO SHUNICHIRO
IPC分类号： B60W10/02 , B60W10/08 , B60W10/10 , F16H61/12 , F16H63/46 , B60K41/22
摘要： PURPOSE:To operate a clutch properly for running a vehicle even when transmission control is impossible on account of failure of a D.C. motor drive circuit by separating power supply to a motor driving circuit from power supply to a clutch driving circuit, and connecting a circuit switchgear to each of them. CONSTITUTION:The driving circuit of a clutch 2, constitutes the H bridge of transistors 102-105 through a relay 101 from the plus side of a battery 24, where a current detector 106 is connected thereto, and is connected to the minus side of a battery 24. In the driving circuit of a motor 4a, the H bridge of transistors 202-205 is constructed through a relay 201 from the plus side of the battery 24, where a current detector 206 is connected to connect it with the minus side of the battery 24. The relays 101, 201, the transistors 102-105, 202-205 and a current detection signal are controlled with I/OLSi13. Therefore, in the event of a broken motor driving circuit, namely the transistors 202 and 203 or 204 and 205 are shorted, and when its excessive current is detected by a resistor 206, the relay 201 is opened, and then running by clutch control only is carried out.

4. 发明专利

JPS63302305A ROTATION ANGLE DETECTOR 失效
公开(公告)号：JPS63302305A
公开(公告)日：1988-12-09
申请号：JP13809887
申请日：1987-06-03
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： HASEGAWA AKIRA , MAEDA YUJI
IPC分类号： G01D5/30 , G01B11/00
摘要： PURPOSE:To obtain a detector small with high resolutions free from effect of a high temperature and electromagnetic noise, by inserting an optical fiber between a light emitting element and a photodetector and a rotary disc as separated therefrom. CONSTITUTION:An optical fiber is inserted between light emitting element and photodetector 76 and 78 and a disc 32 as separated therefrom 76 and 78. In other words, light radiated from the light emitting element 76 is introduced near the disc 32 with a first optical fiber 54 to irradiate the disc 32 with light emitted at an end face of the fiber 54. The reflected light from the disc 32 is introduced with second optical fibers 56a-56f to the photodetector 78. On the other hand, light emitted from the optical fiber 54 expands and hits the disc 32 based on numerical aperture determined by refractive indexes of a core and a clad composing the optical fiber. The reflected light expands more than doubling the angle of expansion of the emitted light toward the optical fibers 56a-56f. To receive the reflected light efficiently, the fiber 54 is selected in a smaller numerical aperture while the optical fibers 56a-56f in a larger numerical aperture.

5. 发明专利

JPH03107623A POWER TRANSMISSION DEVICE FOR VEHICLE 失效
公开(公告)号：JPH03107623A
公开(公告)日：1991-05-08
申请号：JP24225289
申请日：1989-09-20
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： SATO KAZUHIKO , HASEGAWA AKIRA , HORIUCHI MICHIMASA
IPC分类号： F16D48/06 , F16D37/02 , F16H59/08
摘要： PURPOSE:To enable to control a car with ease and smoothly by mounting such a means that can be selected by a driver himself depending on situation to judge where creep exists or not or degree of creep. CONSTITUTION:A creep SW 24 which determines degree of creep connects resistance of different values at each contact and judges contacts 1, 2, 3 by reading changes of each voltage at contacts 1, 2, 3 by an A/D converter. The device is set to each conduction ratio, D1, D2, D3, via a straight line 50 at the condition of contacts 1, 2, 3, and when the conduction ratio advances from D1 to D3, the conduction ratio increases and degree of creep becomes hard. Next, it judges which contact is on when the creep SW is on and outputs conduc tion ratio combined at the time of each contact. It is possible for a driver to recognize degree of creep by the SW depending on situation by this kind of operation.

6. 发明专利

JPH0320160A CONTROLLER FOR CAR AUTOMATIC TRANSMISSION 失效
公开(公告)号：JPH0320160A
公开(公告)日：1991-01-29
申请号：JP14841489
申请日：1989-06-13
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： SATO KAZUHIKO , HORIUCHI MICHIMASA , HASEGAWA AKIRA
IPC分类号： B60W10/02 , B60W10/08 , B60W10/10 , F16H9/00 , F16H59/06 , F16H59/70 , F16H61/00 , F16H61/12
摘要： PURPOSE:To promote protection for a system and secureness for reliability by narrowing a shift allowable range successively when the deviation between a shift command value to a transmission gear ratio controlling DC motor and an actual shift value will not become unchanged of more than the specified time. CONSTITUTION:A controller 10 inputs each signal out of various sensors and outputs a shift command to a transmission gear ratio controlling DC motor 4a, thereby controlling a transmission gear ration of a belt type continuously variable transmission mechanism 4. This controller 10 is provided with a shift allowable range calculating means which sets a shift allowable range depending on by at least one side of both upper and lower limit values specified, in response to an actual transmission gear ratio being calculated out of each signal of speed sensors 16, 17. When a driving force lock is produced in the DC motor 4a and the deviation between a shift command value and an actual shift value becomes unchanged as long as more than the specified time, the shaft allowable range is narrowing successively, so that an electric current flowing in the DC motor 4a is convergently controlled to the specified value including zero. Thus, it is surely protected from an overcurrent.

7. 发明专利

JPH02270644A VEHICLE TRANSMISSION 失效
公开(公告)号：JPH02270644A
公开(公告)日：1990-11-05
申请号：JP9071589
申请日：1989-04-12
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： HASEGAWA AKIRA , SATO KAZUHIKO , HORIUCHI MICHIMASA , SUGIMOTO SHUNICHIRO
IPC分类号： B60K31/00 , F16D48/06 , F16H61/00 , F16H61/02 , F16H61/20 , F16H61/662 , F16H63/46
摘要： PURPOSE:To enhance the operatability at the time of a road being jammed, a thing in which an electromagnetic clutch connecting condition is controlled by means of control data operated on the basis of a plurality of operation data, by controlling the electromagnetic clutch connecting condition so that the speed of a vehicle may become a minute one which is predetermined, at the time of an accelerator being operated. CONSTITUTION:At a thing in which the rotation force of an engine 1 is transmitted to the drive wheels of a vehicle through an electromagnetic clutch 2, a reduction gear portion 3, a continuously variable transmission 4 and a differential gear portion 6, an engine rotation number sensor 18, a rotation number sensor 16 detecting the number of the rotation of the driven pulley 41 of the continuously variable transmission 4 and the speed of the vehicle, a throttle sensor 19 and a water temperature sensor 20 or the like, are equipped, and these output signals are inputted into a controller 10. An electromagnetic clutch 2 connecting condition is controlled by means of control data operated according to the condition of operation. That is, the electromagnetic clutch 2 is cut off at the time of the detection of a vehicle stop condition, while the electromagnetic clutch 2 connecting condition is controlled so that the speed of the vehicle may become a minute one which is predetermined, at the time of the detection of an accelerator being stepped on.

8. 发明专利

JPH03244860A CONTROL SYSTEM FOR AUTOMOBILE 失效
公开(公告)号：JPH03244860A
公开(公告)日：1991-10-31
申请号：JP3844990
申请日：1990-02-21
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： HASEGAWA AKIRA , HORIUCHI MICHIMASA , SATO KAZUHIKO , SATO SUSUMU
IPC分类号： B60W10/00 , B60W10/02 , B60W10/08 , B60W10/10 , F16H9/00 , F16H59/24 , F16H59/36 , F16H59/44 , F16H59/50 , F16H59/52 , F16H59/74 , F16H61/00 , F16H61/02 , F16H61/28 , F16H63/46 , G01G19/03
摘要： PURPOSE:To make improvements in responsiveness and control stability by estimating the gross weight of an automobile from the detected data of throttle opening, car speed, engine speed of the like at a transient period, and compensating the controlled variable of these data. CONSTITUTION:An arithmetic control part 10 inputs each signal of a select position detecting sensor 14, an accelerator detecting sensor 15a, a brake detecting sensor 15b, a car speed sensor 16, an engine speed sensor 18, a throttle opening sensor 19, etc., and it controls a DC motor for a continuously variable transmission 4 and a solenoid clutch 2 according to a driving state. In this case, the gross weight of a vehicle is estimated from the magnitude of a transient response of the detected data on throttle opening, car speed, engine speed or the like at a transient period (acceleration and deceleration) at time of car running, and on the basis of this estimated weight, the controlled variable is compensated. Thus improvements in responsiveness and control stability at time of actual driving are promotable.

9. 发明专利

JPH02240418A CONTROL DEVICE FOR AUTOMOBILE CONTINUOUSLY VARIABLE TRANSMISSION 失效
公开(公告)号：JPH02240418A
公开(公告)日：1990-09-25
申请号：JP5772889
申请日：1989-03-13
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： HASEGAWA AKIRA , SATO KAZUHIKO , HORIUCHI MICHIMASA , SUGIMOTO SHUNICHIRO
IPC分类号： B60W10/02 , B60W10/04 , F16D37/02 , F16D48/02 , F16D48/06 , F16H59/08 , F16H59/38 , F16H59/44
摘要： PURPOSE:To start an engine by turning force of a drive wheel by constituting a device using a continuously variable transmission, provided with an electromagnetic clutch, controlling it being based on information of a select lever position, engine speed and a car speed. CONSTITUTION:Turning force of an engine 1 is interrupted by an electromagnetic clutch 2 and transmitted through a reduction gear 3, continuously variable transmission mechanism part 4 and a differential gear part 6 to a drive wheel 7 of a vehicle made possible to run. The electromagnetic clutch 2, by a control unit 10 controlling a vehicle transmission, trarnsmits torque by allowing an electric current to flow in a coil 2a in the inside of the clutch. The constitution is such that the electromagnetic clutch 2 is conducted by an arbitrary rate of conduction by the control unit 10 when a select lever is placed in a forward running position with the engine 1 in stopping further when a car speed satisfies a condition holding not less than a preset value. Thus by the drive wheel 7 rotating the engine 1, it can be started without using a starter.

10. 发明专利

JP2009124744A Video display device 有权
标题翻译：视频显示设备
公开(公告)号：JP2009124744A
公开(公告)日：2009-06-04
申请号：JP2009011514
申请日：2009-01-22
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OKA NAOYA , HASEGAWA AKIRA , TSURU YASUTAKA , AOKI KOJI , SAKAMOTO HIROFUMI
IPC分类号： H04N9/64 , H04N5/66 , H04N9/12
摘要： PROBLEM TO BE SOLVED: To improve the contrast sensation, by applying gamma correction processing corresponding to the case where there are a plurality of feature regions which number large in the frequency of a detected luminance histogram.
SOLUTION: APL of an input video signal and a luminance histogram calculation result are used to perform gamma correction processing, corresponding to the brightness of the input video signal, and gradation expansion processing is performed on a plurality of and a large number of feature regions in the frequency of the detected luminance histogram detected so that contrast sensation is improved, by applying an optimal processing according to the input video signal.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了改善对比度感觉，通过对与检测到的亮度直方图的频率中具有大数量的多个特征区域的情况相对应的伽马校正处理来应用伽马校正处理。解决方案：输入视频信号和亮度直方图计算结果的APL用于执行与输入视频信号的亮度对应的伽马校正处理，并且对多个和多个检测到的检测到的亮度直方图的频率的特征区域，通过根据输入的视频信号应用最佳处理，从而改善对比度感觉。版权所有（C）2009，JPO＆INPIT

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