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公开(公告)号：US06250077B1
公开(公告)日：2001-06-26
申请号：US09071242
申请日：1998-05-01
申请人： Takashi Iino , Akihito Okuda , Shigeru Morimoto
发明人： Takashi Iino , Akihito Okuda , Shigeru Morimoto
IPC分类号： F16D3108
CPC分类号： F16H61/46 , F16H47/04 , F16H61/462 , F16H2037/0866
摘要： A hydraulic continuously variable transmission for use on a vehicle comprises a hydraulic variable pump, which is driven by an engine, and a hydraulic variable motor, which is driven by oil discharged from the hydraulic variable pump to drive wheels. In addition, this transmission includes shift position detecting means, which detects a shift position, and vehicle stop detecting means, which detects whether the vehicle is in halt. In this transmission, when the vehicle stop detecting means detects that the vehicle is in halt and the shift position detecting means detects that the shift position is in a forward or rearward drive position, the discharge capacity of the hydraulic variable motor is set to a maximum, and the discharge capacity of the hydraulic variable pump is controlled to a predetermined capacity (first predetermined capacity) in correspondence with the shift position. Thereby, the vehicle is prevented from relapse phenomenon, i.e., being dragged in the direction opposite to the direction set with the shift lever when the vehicle is stopped on a slope.
摘要翻译： 用于车辆的液压无级变速器包括由发动机驱动的液压可变泵和由从液压可变泵排出到驱动轮的油驱动的液压可变电动机。 此外，该变速器包括检测换档位置的换档位置检测单元，以及车辆停止检测单元，其检测车辆是否停止。 在该变速器中，当车辆停止检测单元检测到车辆停止并且变速位置检测单元检测到变速位置处于向前或向后的驱动位置时，液压可变电动机的排出能力被设定为最大 ，并且与变速位置对应地将液压可变泵的排出容量控制在预定容量（第一预定容量）。 因此，当车辆停在斜坡上时，防止车辆复位现象，即在与变速杆设定的方向相反的方向上被拖动。
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公开(公告)号：US5785623A
公开(公告)日：1998-07-28
申请号：US520342
申请日：1995-08-28
申请人： Takashi Iino , Mikihiro Takano , Akihito Okuda
发明人： Takashi Iino , Mikihiro Takano , Akihito Okuda
CPC分类号： F16H47/04 , F16H2037/0866
摘要： A hydraulic/mechanical transmission device for providing variable speed change ratios with a decreased number of parallel shafts and a simplified and compact structure. A hydrostatic continuously variable transmission includes a hydraulic pump 24 with a pump cylinder block 28 and a hydraulic motor 25 with a motor cylinder block 34. An input shaft 9 and first and second output shafts 10.sub.1 and 10.sub.2 of a power dividing device 3 are coaxially disposed. The first output shaft 10.sub.1, is coaxially connected to the pump cylinder block 28 of the hydraulic pump 24. A power collecting shaft 17 is disposed parallel to the first and second output shafts 10.sub.1 and 10.sub.2 and coaxially connected to the motor cylinder block 34 of the hydraulic motor 25.
摘要翻译： 一种液压/机械传动装置，用于提供具有减少数量的平行轴的可变速度变化率和简化且紧凑的结构。 液压无级变速器包括具有泵缸体28的液压泵24和具有电动机缸体34的液压马达25.动力分配装置3的输入轴9和第一和第二输出轴101和102同轴设置 。 第一输出轴101与液压泵24的泵缸体28同轴连接。动力收集轴17平行于第一和第二输出轴101和102设置，同轴地连接到液压泵24的马达缸体34。 液压马达25。
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公开(公告)号：US06442934B1
公开(公告)日：2002-09-03
申请号：US09232654
申请日：1999-01-19
申请人： Akihito Okuda , Shigeru Morimoto , Koichi Fushimi
发明人： Akihito Okuda , Shigeru Morimoto , Koichi Fushimi
IPC分类号： F04B4912
CPC分类号： F16H61/468 , F04B49/002 , F04B49/065 , F16H47/04 , F16H61/46 , F16H2037/0866
摘要： The present invention provides a hydraulic controller for a variable capacity hydraulic transmission. This hydraulic controller reduces the load of the engine to improve fuel efficiency while maintaining a hydraulic pressure which is necessary for the control of the skew angles of the swash plates of the variable capacity type hydraulic pump and hydraulic motor that are incorporated in the transmission. The hydraulic controller adjusts the hydraulic pressure supplied to the servo cylinders 92 and 96 which are to tilt the pump swash plate 32 and the motor swash plate 38, to a minimum necessary pressure on the basis of the pressure Ph of the oil passage which is at the higher pressure in the hydraulic closed circuit 26. The hydraulic controller adjusts the hydraulic pressure also on the basis of the types of the valve plates of the hydraulic pump 24 and the hydraulic motor 25, the skew angles of the swash plates, the rotational speed Np of the hydraulic pump and the rotational speed Nm of the hydraulic motor, and the operational condition of the transmission.
摘要翻译： 本发明提供一种用于可变容量液压传动装置的液压控制器。 该液压控制器降低发动机的负载以提高燃料效率，同时保持用于控制可变容量型液压泵和液压马达的斜盘的倾斜角度所必需的液压，该液压压力机和液压马达装在变速器中。 液压控制器根据油路中的压力Ph，将提供给伺服缸92和96的液压压力调整到最小必要压力，使伺服缸92和96倾斜泵斜盘32和马达斜盘38。 液压闭合回路26中的压力越高。液压控制器还根据液压泵24和液压马达25的阀板的类型，斜盘的倾斜角度，转速 液压泵的Np和液压马达的转速Nm，以及变速器的运转状态。
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4.发明授权
公开(公告)号：US06109031A
公开(公告)日：2000-08-29
申请号：US146138
申请日：1998-09-03
CPC分类号： F16H61/423 , F16H47/04 , F16H61/4017 , F16H2037/0866 , F16H2059/6853 , F16H59/24
摘要： A relief pressure controlling device comprises a driving side relief pressure controlling valve, a capacity detector which detects the capacity of a hydraulic pump, and an engine throttle opening detector. When the hydraulic pump and the hydraulic motor which are connected by a first oil passage and a second oil passage constituting a hydraulic closed circuit are driven by an engine, the relief pressure controlling valve controls the relief pressure of the oil passage on the driving side that is either the first oil passage or the second oil passage whose pressure becomes higher than the other, to a target relief pressure. The target relief pressure is determined in correspondence with the engine output and corrected on the basis of the pump efficiency which is predetermined in relation to the capacity of the hydraulic pump and to the throttle opening, and this corrected target relief pressure is set as a driving side target relief pressure. The driving side relief pressure controlling valve performs a relief pressure control so that the relief pressure of the driving side oil passage will become the driving side target relief pressure, which is set in correspondence with the capacity of the hydraulic pump and the engine throttle opening.
摘要翻译： 安全压力控制装置包括驱动侧释放压力控制阀，检测液压泵的容量的容量检测器和发动机节气门开度检测器。 当通过第一油路连接的液压泵和液压马达和构成液压闭合回路的第二油路由发动机驱动时，溢流压力控制阀控制驱动侧油路的溢流压力， 是压力变得高于另一个的第一油路或第二油路，达到目标减压压力。 目标释放压力是根据发动机输出确定的，并根据相对于液压泵的容量和节气门开度而预先确定的泵效率进行校正，该修正后的目标释放压力被设定为行驶 侧目标缓解压力。 驱动侧泄压控制阀进行溢流压力控制，使得驱动侧油路的溢流压力成为与液压泵和发动机节气门开度相对应地设定的驱动侧目标溢流压力。
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公开(公告)号：US5317873A
公开(公告)日：1994-06-07
申请号：US836622
申请日：1992-02-13
CPC分类号： F04B1/2042 , Y10T74/18336
摘要： A swash-plate plunger-type hydraulic device has a cylinder block with a plurality of plungers slidably fitted in cylinder bores, a swash plate confronting one end of the cylinder block, and a distribution valve plate slidably held against the other end of the cylinder block. The cylinder block has an even number of circularly arrayed connecting ports communicating with the cylinder bores and opening at the other end thereof. The distribution valve plate has inlet and outlet ports. The cylinder block is rotatable through an angular displacement .theta.1 in which the hydraulic pressure in one connecting port between the inlet and outlet ports increases from a lower pressure to a higher pressure, through an angular displacement .theta.2 in which the hydraulic pressure in one connecting port between the inlet and output ports decreases from the higher pressure to the lower pressure, and through an angular displacement .theta.3 from a position where the hydraulic pressure starts to increase to a position where the hydraulic pressure starts to decrease. The inlet and outlet ports are defined such that the angular displacements .theta.1, .theta.2, .theta.3 are expressed by:.theta.1=.theta.2 and .theta.3=180.degree..
摘要翻译： 斜盘式柱塞式液压装置具有气缸体，其具有可滑动地装配在气缸孔中的多个柱塞，面对气缸体一端的斜盘和可滑动地保持抵靠气缸体的另一端的分配阀板 。 气缸体具有与气缸孔连通并且在其另一端开口的圆形排列连接口的偶数。 分配阀板有入口和出口。 气缸体可旋转通过角位移θ1，其中入口端口和出口端口之间的一个连接口中的液压压力从较低压力增加到较高压力，通过角位移θ2，其中一个连接中的液压 入口端口和输出端口之间的端口从较高的压力降低到较低的压力，并且通过从液压开始增加到液压开始减小的位置的角位移θ3。 入口端口和出口端口被定义为使得角位移θ1，θ2，θ3由以下表示：θ1 =θ2和θ3 = 180°。
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公开(公告)号：US4891944A
公开(公告)日：1990-01-09
申请号：US132481
申请日：1987-12-14
IPC分类号： F16H39/14
CPC分类号： F16H39/14
摘要： A hydraulically operated continuously variable transmission comprises a hydraulic motor coupled to an output shaft, a hydraulic pump coupled an input shaft, and a closed hydraulic circuit interconnecting the hydraulic motor and the hydraulic pump. The hydraulic motor has an annular array of slidable motor plungers disposed around an axis of rotation thereof and slidably disposed in respective cylinder holes defined in the motor cylinder. The hydraulic motor also has a distribution ring supported on the fixed shaft and rotatable relatively to and slidable against an end face of the motor cylinder for introducing high-pressure oil successively into the cylinder holes and discharging oil successively from the cylinder holes in response to rotation of the motor cylinder. The transmission also includes a hydraulic pump coupled to an input shaft, at least one of the hydraulic pump and the hydraulic motor being of the variable-displacement type, and a closed hydraulic circuit interconnecting the hydraulic pump and the hydraulic motor. The distribution ring is held in engagement with the fixed shaft for preventing the distribution ring from rotating with respect to the fixed shaft.
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7.发明授权Piezoelectric ceramic, method for producing piezoelectric ceramic, and piezoelectric oscillator 有权压电陶瓷，制造压电陶瓷的方法和压电振荡器公开(公告)号：US06479923B1
公开(公告)日：2002-11-12
申请号：US09321243
申请日：1999-05-27
申请人： Akihito Okuda , Akinobu Takamura , Masataka Kida , Yoshiaki Kohno
发明人： Akihito Okuda , Akinobu Takamura , Masataka Kida , Yoshiaki Kohno
IPC分类号： H01L41187
CPC分类号： H03H9/178 , H01L41/187 , H03H9/0207
摘要： A piezoelectric ceramic comprising lead titanate as a primary component, wherein the primary component contains a titanium oxide crystalline phase. Methods for producing the ceramic, and piezoelectric oscillators making use of the ceramic are also disclosed.
摘要翻译： 一种包含钛酸铅作为主要成分的压电陶瓷，其中所述主要组分含有氧化钛结晶相。 还公开了制造陶瓷的方法和利用陶瓷的压电振荡器。
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公开(公告)号：US6039666A
公开(公告)日：2000-03-21
申请号：US8351
申请日：1998-01-16
申请人： Akihito Okuda , Koichi Fushimi , Hiroshi Terayama
发明人： Akihito Okuda , Koichi Fushimi , Hiroshi Terayama
IPC分类号： F16H3/46 , F16H47/04 , F16H61/40 , F16H61/4139
CPC分类号： F16H47/04 , F16H2037/0866 , F16H3/46
摘要： A power of an input shaft driven by an engine is divided by a power dividing device and transmitted to first and second output shafts and a hydraulic pump of a hydrostatic continuously variable transmission is driven by the first output shaft, whereas a hydraulic motor is driven by the second output shaft through a mechanical transmission device and also by the hydraulic pump. A main oil pump is provided at the input shaft which rotates at the same speed as an engine speed, and a subsidiary oil pump is provided at the first output shaft which decreases rotational speed thereof to zero with an increase in the engine rotational speed. In a low rotational speed region of the engine, oil is supplied by both the main oil pump and the subsidiary oil pump, whereas in a high rotational speed region of the engine, oil is supplied by only the main oil pump. With this construction, it is possible to prevent a waste of energy required to drive the oil pump in the high rotational speed region of the engine while ensuring the quantity of oil supply from the oil pump in the low rotational speed region of the engine.
摘要翻译： 由发动机驱动的输入轴的动力由动力分配装置分开，传递到第一输出轴和第二输出轴，液压无级变速器的液压泵由第一输出轴驱动，液压马达由 第二输出轴通过机械传动装置和液压泵。 主输油轴设置在与发动机转速相同的速度旋转的输入轴上，并且在第一输出轴处设置有辅助油泵，其随着发动机转速的增加而将其转速降至零。 在发动机的低转速区域中，油由主油泵和辅助油泵两者供油，而在发动机的高转速区域中，仅由主油泵供油。 通过这种结构，能够在确保从发动机的低转速区域的油泵供油量的同时，防止在发动机的高转速区域内驱动油泵所需的能量的浪费。
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公开(公告)号：US5333453A
公开(公告)日：1994-08-02
申请号：US834925
申请日：1992-02-13
CPC分类号： F04B1/2042
摘要： A swash-plate plunger-type hydraulic device has a cylinder block with a plurality of plungers slidably fitted in cylinder bores, a swash plate confronting one end of the cylinder block, and a distribution valve plate slidably held against the other end of the cylinder block. The cylinder block has an odd number of circularly arrayed connecting ports communicating with the cylinder bores and opening at the other end thereof. The distribution valve plate has inlet and outlet ports. The cylinder block is rotatable through an angular displacement .theta.1 in which the hydraulic pressure in one connecting port between the inlet and outlet ports increases from a lower pressure to a higher pressure, through an angular displacement .theta.2 in which the hydraulic pressure in one connecting port between the inlet and output ports decreases from the higher pressure to the lower pressure, and through an angular displacement .theta.3 from a position where the hydraulic pressure starts to increase to a position where the hydraulic pressure starts to decrease. The inlet and outlet ports are defined such that the angular displacements .theta.1, .theta.2, .theta.3 are expressed by:.theta.1=.theta.2=360.degree./Z.times.kwhereZ: the number of the plungers (odd number) andk=1, 2, 3, . . . (integer) , and .theta.3=180.degree..
摘要翻译： 斜盘式柱塞式液压装置具有气缸体，其具有可滑动地装配在气缸孔中的多个柱塞，面对气缸体一端的斜盘和可滑动地保持抵靠气缸体的另一端的分配阀板 。 气缸体具有与气缸孔连通的奇数个圆形连接端口，并在其另一端开口。 分配阀板有入口和出口。 气缸体可旋转通过角位移θ1，其中入口端口和出口端口之间的一个连接口中的液压压力从较低压力增加到较高压力，通过角位移θ2，其中一个连接中的液压 入口端口和输出端口之间的端口从较高的压力降低到较低的压力，并且通过从液压开始增加到液压开始减小的位置的角位移θ3。 入口和出口定义为角位移θ1，θ2，θ3由以下表示：θ1 =θ2 = 360°/ Zxk其中Z：柱塞的数量（奇数）和k = 1 ，2，3，。 。 。 （整数），θ3 = 180°。
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10.发明授权
公开(公告)号：US4959959A
公开(公告)日：1990-10-02
申请号：US268693
申请日：1988-11-08
申请人： Akihito Okuda , Yoshihiro Katagiri , Hiromi Aoki
发明人： Akihito Okuda , Yoshihiro Katagiri , Hiromi Aoki
CPC分类号： F16H39/14
摘要： A hydraulically operated continuously variable transmission comprising a hydraulic motor of the variable displacement type having a motor cylinder coupled to an output shaft and including motor plungers slidably disposed respectively in a number of cylinder holes defined in an annular pattern surrounding the axis of rotation of the motor cylinder, and a hydraulic pump coupled to an input shaft. The hydraulic motor and hydraulic pump are interconnected by a closed hydraulic circuit in which the flow of working oil is controlled by a distribution ring which is relatively rotatably and slidably held against an end surface of the motor cylinder for successively switching the introduction of working oil into the cylinder bores and the discharge of working oil from the cylinder bores in response to rotation of the motor cylinder. The distribution ring has an asymmetrical hydraulic pressure bearing area in order to minimize forces tending to tilt the distribution ring relative to the motor cylinder end surface.
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