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1. 发明专利

JPH05303387A 失效
公开(公告)号：JPH05303387A
公开(公告)日：1993-11-16
申请号：JP10999392
申请日：1992-04-28
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG , NISSAN MOTOR
发明人： SAKURAI YOSHIHIRO , NAKAMURA MITSURU , SATO KENJI , ONO KOICHI , HASEGAWA SATOSHI
IPC分类号： B60R11/02 , G10K11/16 , G10K11/178
摘要： PURPOSE:To provide a constant performance in which engine sounds in a compartment are actively muffle controlled despite of the production dispersion of a speaker driving amplifier gain. CONSTITUTION:Expected output powers of an adaptive filter in each number of revolution region of an engine 1 which is the source of vibration, are beforehand set in a ROM 31 and obtain the total sum of the deviations between actually measured powers and the expected values. And in accordance with the total sum, change the threshold value of the filter output power which judges whether a divergence condition exists or not. Having this, an erroneous judgement, in which a divergence condition exists so as to stop a muffle control, is prevented and unpleasant noises are stably cancelled for the passengers.

2. 发明专利

JPH07247890A OPENING CONTROL DEVICE FOR ELECTRONIC THROTTLE VALVE 失效
公开(公告)号：JPH07247890A
公开(公告)日：1995-09-26
申请号：JP3556094
申请日：1994-03-07
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： HAMAZAKI HIROYUKI , SUGAWARA HAYATO , SATO KENJI , SHIMADA KOSAKU
IPC分类号： F02D9/02 , F02D41/14 , F02D45/00
摘要： PURPOSE:To improve precision of control of a throttle valve opening by a method wherein when a throttle valve is in a given initial region, a current real full closed position is learnt and in following, control is effected as a changing actual full closed position is corrected. CONSTITUTION:A traction control system is directly operated by an accelerator pedal 101 and a throttle valve 100 opening and closing of which are controlled by a motor 102 is provided. Through traction control, opening and closing of a throttle valve 100 are controlled. The throttle valve 100 is forcibly driven to a full closed position by the motor 102, and a means to learn a full closed position where control of opening and closing by the motor 102 is practicable by a motor position sensor 109 is provided. The full closed position where the hourly changing throttle valve 100 is controllable by a sensor 108 to detect the opening of the accelerator pedal 101 is learnt through updating of a minimum value. A computing means 106 to reflect a result in the full closed position of the motor position sensor 109 is provided.

3. 发明专利

JPH0731121A STEPPING MOTOR 失效
公开(公告)号：JPH0731121A
公开(公告)日：1995-01-31
申请号：JP16988193
申请日：1993-07-09
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： ISHIKURA HISATSUGU , SATO KENJI
IPC分类号： H02K37/12 , H02K37/14
摘要： PURPOSE:To provide a high torque, low cost stepping motor for wide application by extending the axial length of a pectinated tooth pole without increasing the leakage flux. CONSTITUTION:The poles of a stator comprises an inner stator 6, i.e., a hollow tubular inductor pectinated on the opposite sides, and two cup-like outer stators 4, 11, i.e. inductors pectinated on side, disposed on the opposite sides of the inner stator 6. The pectinated tooth poles of the inner stator 6 and the outer stators 4, 11 have tips opposing each other. Since the adjacent tooth poles do not oppose each other over the entire length thereof, leakage flux 21 is reduced. Leakage flux 21 does not occur at the root of tooth pole where the flux density is high, because the tooth poles are not arranged contiguously thereat.

4. 发明专利

JPH0735186A CONTROL UNIT AND METHOD OF STEP MOTOR AVAILABLE IN THOSE OF VIBRO-DAMPER, DAMPING FORCE VARIABLE TYPE VIBRO-DAMPING MECHANISM, AUTOMOBILE DAMPING FORCE VARIABLE TYPE SHOCK ABSORBER, MOVABLE BODY EQUIPPED WITH VIBRO-DAMPER, AND DAMPING FORCE VARIABLE SHOCK ABSORBER 失效
公开(公告)号：JPH0735186A
公开(公告)日：1995-02-03
申请号：JP18242993
申请日：1993-07-23
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： SUGAWARA HAYATO , TAJIMA FUMIO , SATO KENJI , MUTO MAKOTO
IPC分类号： B60G17/015 , F16F9/50 , G05D19/02
摘要： PURPOSE:To ensure switching responsiveness in reducing a shock in time of a changeover without lessening the angle of a step motor available in switching the damping force of a shock absorber. CONSTITUTION:The extent of damping force in a shock absorber is switched to more than two steps by the power of a step motor 4. In this case, a motor current is controlled so as, not to make a velocity at the initial stage (within the step angle) in time of transition exceed an angular velocity limit value thetas as detecting an actual position theta. At this time, two processing elements 54 and 56 are selected by two switches SW1 and SW2, and both A- and B-phase currents Ia and Ib are controlled so as to become such an equation as Ia=jXthetasXKXsintheta, Ib=jXthetasXKXsin(theta+90 deg.), and other than this, another processing element 52 is selected, whereby such a current as doing step drive is supplied. In this connection, j is a sign (+ or -1) showing a current direction and K is gain. In place of closed loop control, a transfer velocity may be limited by a constant motor current control pattern.

5. 发明专利

JPH08329385A COMPOSITE BEACON RECEIVER 失效
公开(公告)号：JPH08329385A
公开(公告)日：1996-12-13
申请号：JP13072795
申请日：1995-05-29
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： ARAKI HIROSHI , HORII SHIRO , SATO KENJI
IPC分类号： G01C21/00 , G01S1/68 , G01S5/02 , G01S19/05 , G01S19/14 , G01S19/35 , G08G1/09 , G08G1/0968
摘要： PURPOSE: To obtain the composite beacon receiver wherein communication media are integrated by integrating and providing a transmission and reception part for a light signal and a reception part for a radio wave signal in the same housing. CONSTITUTION: A common antenna 1 for both the GPS(global positioning system) and radio wave beacon receive the radio wave signal sent from a GPS satellite and the radio wave signal sent from the radio wave beacon of VICS at the same time. A photodetection part 2 and a projection part 3 send and receive the infrared light of the light beacons of VICS(vichole information a communication system) (universal traffic magnament system) and UTMS. Those common antenna 1 for the GPS and radio wave beacon, photodetection part 2, and projection part 3 are incorporated in a head unit 4 as a storage case. Signals of the GPS, radio wave beacon, and light beam, etc., sent and received by the head unit 4 are connected to a control unit 8 through a coaxial cable 5. In the control unit 8, an amplifier 6 and a data decoder 7 for GPS are provided.

6. 发明专利

DE69622504T2 未知
公开(公告)号：DE69622504T2
公开(公告)日：2003-03-27
申请号：DE69622504
申请日：1996-11-06
申请人： HITACHI LTD
发明人： MATSUDA YUTAKA , KONUMA NOBUHIRO , SATO KENJI
IPC分类号： H04N5/74 , H04N9/31
摘要： In a liquid crystal projector using a reflective and scattering or reflective type liquid crystal panel, a plurality of light sources are used, thereby securing sufficient brightness of an image, increasing the F-number of a projection lens, and miniaturizing and lightening the projector. A light source is arranged right next to the projection lens and an exhaust port is arranged on the front face of the projector, thereby preventing hot heat discharged from the exhaust port from being discharged toward peripheral equipment or the operator.

7. 发明专利

DE68912146D1 未知
公开(公告)号：DE68912146D1
公开(公告)日：1994-02-24
申请号：DE68912146
申请日：1989-01-27
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： SHIOMI MAKOTO , OHSAWA MICHITAKA , SAKAMOTO TOSHIYUKI , MATSUMI KUNINORI , OZEKI KOSUKE , YUKI IKUO , SATO KENJI
IPC分类号： H04N9/28 , H04N3/23 , H04N9/31
摘要： A convergence correcting apparatus is used in a projection television receiver including a CRT (1010) having an aspherical fluorescent screen (P1) and a projection lens apparatus which is attached to the display screen of the CRT and has aspherical plastic lenses (101, 103, 104). In the digital convergence correcting apparatus, a digital memory (8) stores digital correction data corresponding to correction values of convergence adjustment points (201) indicative of a plurality of points on the display screens divided in the horizontal and vertical directions. A multiplexer (15) reads out predetermined digital correction data from the digital memory (8) and time sharingly multiplexes. At least one digital/analog converter (19) receives the time sharingly multiplexed data from the multiplexer (15) and generates an analog signal. Sample and hold circuits (26, 26 min ) extract a predetermined correction signal from the analog output of the digital/analog converter (19) and sample and hold them. The convergence correcting apparatus is driven in accordance with the respective correction signals held by the sample and hold circuits (26, 26 min ).

8. 发明专利

DE68912146T2 未知
公开(公告)号：DE68912146T2
公开(公告)日：1994-07-07
申请号：DE68912146
申请日：1989-01-27
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： SHIOMI MAKOTO , OHSAWA MICHITAKA , SAKAMOTO TOSHIYUKI , MATSUMI KUNINORI , OZEKI KOSUKE , YUKI IKUO , SATO KENJI
IPC分类号： H04N9/28 , H04N3/23 , H04N9/31
摘要： A convergence correcting apparatus is used in a projection television receiver including a CRT (1010) having an aspherical fluorescent screen (P1) and a projection lens apparatus which is attached to the display screen of the CRT and has aspherical plastic lenses (101, 103, 104). In the digital convergence correcting apparatus, a digital memory (8) stores digital correction data corresponding to correction values of convergence adjustment points (201) indicative of a plurality of points on the display screens divided in the horizontal and vertical directions. A multiplexer (15) reads out predetermined digital correction data from the digital memory (8) and time sharingly multiplexes. At least one digital/analog converter (19) receives the time sharingly multiplexed data from the multiplexer (15) and generates an analog signal. Sample and hold circuits (26, 26 min ) extract a predetermined correction signal from the analog output of the digital/analog converter (19) and sample and hold them. The convergence correcting apparatus is driven in accordance with the respective correction signals held by the sample and hold circuits (26, 26 min ).

9. 发明专利

GB2259223A Apparatus for actively reducing noise for interior of enclosed space 未知
公开(公告)号：GB2259223A
公开(公告)日：1993-03-03
申请号：GB9218395
申请日：1992-08-28
申请人： NISSAN MOTOR , HITACHI LTD
发明人： HAMABE TSUTOMU , KINOSHITA AKIO , DOI KAZUHIRO , MURAOKA KENICHIRO , SATO KENJI
IPC分类号： B64C1/40 , G10K11/178 , G10K11/16
摘要： The apparatus uses an FIR adaptive digital filter 13. A control circuit 16 outputs drive signals to a plurality of loud speakers 7 which generate control sounds to be interfered with a noise sound propagated in the interior of the space so that a performance function including terms of residual noise signals output from residual noise signal detecting microphones 8 and drive signals to the loud speakers is minimized and contributivity of the drive signals to the performance function is changed according to an occurrence of divergence in the noise reducing apparatus. The apparatus is suitable for use with vehicles.

10. 发明专利

DE102006006587A1 未知
公开(公告)号：DE102006006587A1
公开(公告)日：2006-08-24
申请号：DE102006006587
申请日：2006-02-13
申请人： HITACHI LTD
发明人： SATO KENJI , SUGA SEIJI
IPC分类号： F01L1/34

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