公开(公告)号：US5875865A

公开(公告)日：1999-03-02

申请号：US600254

申请日：1996-02-12

申请人： Tatsuo Wakahara ,  Kenichiro Murakami

发明人： Tatsuo Wakahara ,  Kenichiro Murakami

IPC分类号： B60K17/348 ,  B60K17/342 ,  B60K17/344 ,  B60K17/346 ,  B60K17/35 ,  B60K23/08

CPC分类号： B60K17/35 ,  B60K23/0808 ,  B60K17/342 ,  B60K17/3467

摘要： A hydraulic-pressure control system for a four-wheel drive vehicle with a hydraulic-pressure operated transfer clutch, which is responsive to a controlled clutch pressure applied thereto to distribute a driving torque passing from a transmission between main drive wheels and auxiliary drive wheels, comprises a pilot-operated directional control valve connected to the transfer clutch for cutting off a supply of hydraulic fluid of the controlled clutch pressure to the transfer clutch and for directing hydraulic fluid of the controlled clutch pressure to the transfer clutch. The system includes a clutch pressure control valve provided upstream of the directional control valve, which pressure control valve is responsive to an external pilot pressure for producing the controlled clutch pressure, and a duty-ratio controlled solenoid valve for decreasingly adjusting the external pilot pressure to be output to the pressure-reduction valve in accordance with an increase in a duty ratio. A controller is provided for forcibly outputting a duty-cycle controlled exciting current of a predetermined high duty ratio such as 100% to the duty-ratio controlled solenoid valve to reduce the controlled clutch pressure to a low pressure level (preferably a minimum clutch pressure) when the directional control valve is maintained at the cut-off position in case of 4L range wherein the transmission is loaded heavier.

摘要翻译： 一种用于具有液压操作传递离合器的四轮驱动车辆的液压控制系统，其响应于施加到其上的受控离合器压力以分配从主驱动轮和辅助驱动轮之间的变速器传递的驱动扭矩， 包括连接到所述转移离合器的先导操作方向控制阀，用于将所述受控离合器压力的液压流体供给到所述转移离合器，并将所述受控离合器压力的液压流体引导至所述转移离合器。 该系统包括设置在方向控制阀的上游的离合器压力控制阀，该压力控制阀响应于用于产生受控离合器压力的外部先导压力，以及用于逐渐调节外部先导压力的占空比控制电磁阀 根据占空比的增加将其输出到减压阀。 提供了一种控制器，用于强制地向占空比控制的电磁阀输出预定高占空比例如100％的占空比受控激励电流，以将受控离合器压力降低到低压级（优选最小离合器压力） 当在4L范围内方向控制阀保持在切断位置时，其中变速器被装载得更重。

公开(公告)号：US5403242A

公开(公告)日：1995-04-04

申请号：US026153

申请日：1993-03-03

申请人： Tatsuo Wakahara ,  Satoshi Sakakibara ,  Akihiro Ueki

发明人： Tatsuo Wakahara ,  Satoshi Sakakibara ,  Akihiro Ueki

IPC分类号： F16H61/02 ,  F16H61/12 ,  F16H61/21 ,  B60K41/24

CPC分类号： F16H61/12 ,  F16H61/0206 ,  F16H2061/122 ,  F16H2061/1264 ,  F16H2306/00 ,  F16H61/0286 ,  F16H61/686

摘要： Under a higher speed gear position of the transmission, a control valve can drain a hydraulic pressure of a forward clutch to cause the forward clutch to take a disengaged condition. With this, undesired friction of a forward one-way clutch under such higher speed gear position is suppressed. A fail-safe system is employed for recovering an engaged condition of the forward clutch even when the control valve is stuck at such pressure draining position.

摘要翻译： 在变速器的较高档位下，控制阀可以排出前进离合器的液压，使前进离合器处于脱离状态。 由此，可以抑制在这种高速档位下的前进单向离合器的不希望的摩擦。 即使当控制阀被卡在这样的排出压力位置时，采用故障保护系统来恢复前进离合器的接合状态。

公开(公告)号：US5103692A

公开(公告)日：1992-04-14

申请号：US709604

申请日：1991-06-05

申请人： Shigeki Shimanaka ,  Yuji Kato ,  Tatsuo Wakahara ,  Hiroshi Asano ,  Shinsuke Nakazawa ,  Hiroshi Sasaki ,  Hiroshi Yamaguchi ,  Kazuhiro Ishigami ,  Shinichi Takenouchi

发明人： Shigeki Shimanaka ,  Yuji Kato ,  Tatsuo Wakahara ,  Hiroshi Asano ,  Shinsuke Nakazawa ,  Hiroshi Sasaki ,  Hiroshi Yamaguchi ,  Kazuhiro Ishigami ,  Shinichi Takenouchi

IPC分类号： B60W10/02 ,  B60K26/00 ,  B60K28/10 ,  B60W10/00 ,  B60W10/04 ,  B60W10/06 ,  B60W10/10 ,  B60W10/103 ,  B60W10/11 ,  F02D29/00 ,  F02D29/02 ,  F02D41/04 ,  F02D41/22 ,  F02D45/00 ,  F02P5/15 ,  F16H41/24 ,  F16H59/14 ,  F16H59/36 ,  F16H59/38 ,  F16H61/00 ,  F16H61/04

CPC分类号： F02D41/22 ,  B60W10/04 ,  B60W10/06 ,  B60W10/11 ,  B60W10/115 ,  B60W30/1819 ,  B60W30/19 ,  F16H61/12 ,  F16H63/502 ,  B60W2510/0638 ,  F16H2059/385 ,  F16H2061/1208 ,  F16H2061/122 ,  F16H2061/126 ,  F16H59/14 ,  F16H59/36 ,  F16H61/0021 ,  Y10S477/906 ,  Y10T477/677 ,  Y10T477/693958

摘要： In order to determine a malfunction which results in the loss of torque reduction control, the engine speed and the torque converter characteristics are monitored when a torque down signal is issued. The maximum engine torque which should be produced under such circumstances is used to derive a corresponding maximum engine speed value. If the actual engine speed exceeds the estimated value, appropriate torque down control can be assumed to have been lost. In response a fail safe such as boosting line pressure to switching to an alternative source of torque control can implemented. A suitable warning signal can also be generated.

摘要翻译： 为了确定导致失去转矩降低控制的故障，当发出转矩降低信号时，监视发动机转速和变矩器特性。 在这种情况下应该产生的最大发动机扭矩用于得出相应的最大发动机转速值。 如果实际的发动机转速超过了估计值，则可以假设适当的转矩下降控制已经丢失。 作为响应，可以实现诸如提高管路压力以切换到替代的转矩控制源的故障安全。 也可以产生合适的警告信号。

公开(公告)号：US5651752A

公开(公告)日：1997-07-29

申请号：US417045

申请日：1995-04-04

申请人： Tatsuo Wakahara ,  Koichi Hayasaki

发明人： Tatsuo Wakahara ,  Koichi Hayasaki

IPC分类号： F02D29/00 ,  B60W10/04 ,  B60W10/10 ,  B60W10/11 ,  F02D41/04 ,  F16H59/18 ,  F16H61/14 ,  F16H61/21 ,  F16H45/00

CPC分类号： F16H61/143 ,  F16H2045/0294 ,  F16H2059/186 ,  F16H61/21 ,  Y10T477/635 ,  Y10T477/679 ,  Y10T477/753 ,  Y10T477/79

摘要： A lock-up controller of a lock-up control system reads-in a vehicle speed V, a throttle opening degree TVO, an engine speed Ne, and a turbine speed Kt from sensors and outputs a fuel-out command and a fuel-supply restart command to an engine controller, to operate a lock-up clutch in a torque converter of an automatic transmission for an automotive vehicle in an accelerator-off (coasting) state of the vehicle. The lock-up control system makes it possible to realize locking-up of the torque converter providing an improved fuel consumption ratio of the engine and a large braking force from the engine, even when a vehicle speed increases due to running down a downward slope while the accelerator-off state continues, or when an up-shifting speed change occurs due to the accelerator-off state.

摘要翻译： 锁定控制系统的锁定控制器从传感器读取车速V，节气门开度TVO，发动机转速Ne和涡轮转速Kt，并输出燃油输出指令和燃料供给 重新启动命令到发动机控制器，以在车辆的加速器（滑行）状态下的机动车辆的自动变速器的变矩器中操作锁止离合器。 锁定控制系统使得可以实现变矩器的锁定，从而提供发动机的改进的燃料消耗率和来自发动机的大的制动力，即使当车辆速度由于沿向下的斜坡下降而增加时， 加速器关闭状态继续，或者当由于加速器关闭状态而发生升档速度变化时。

公开(公告)号：US5501311A

公开(公告)日：1996-03-26

申请号：US319047

申请日：1994-10-06

申请人： Tatsuo Wakahara

发明人： Tatsuo Wakahara

IPC分类号： B60K17/348 ,  B60K23/08 ,  F16D48/02

CPC分类号： B60K23/0808

摘要： A four wheel drive motor vehicle is of a type which has a variable torque transfer through which the driving force distribution between front and rear wheels is varied in accordance with the magnitude of a fluid pressure supplied to the transfer. A fluid pressure control device for producing the fluid pressure comprises a first hydraulic circuit which is arranged to have a first operation mode wherein the first hydraulic circuit outputs, for the transfer, a fluid pressure which is varied continuously; a second hydraulic circuit which is arranged to have a second operation mode wherein the second hydraulic circuit outputs, for the transfer, a fluid pressure which is varied stepwisely; a piping for connecting the first and second hydraulic circuits to constitute a united hydraulic circuit; and shutters arranged in given portions of the piping to selectively open and close the given portions for allowing the united hydraulic circuit to have the first and second operation modes selectively.

摘要翻译： 四轮驱动机动车辆是具有可变转矩传递的类型，根据提供给传送装置的流体压力的大小，前轮和后轮之间的驱动力分布通过该扭矩传递而变化。 一种用于产生流体压力的流体压力控制装置包括：第一液压回路，其被布置成具有第一操作模式，其中第一液压回路输出用于输送连续变化的流体压力; 第二液压回路，其设置成具有第二操作模式，其中所述第二液压回路输出用于转移的逐步变化的流体压力; 用于连接第一和第二液压回路以构成联合的液压回路的管道; 以及布置在管道的给定部分中的百叶窗，以选择性地打开和关闭给定部分，以允许联合液压回路选择性地具有第一和第二操作模式。

公开(公告)号：US5146891A

公开(公告)日：1992-09-15

申请号：US625998

申请日：1990-12-12

申请人： Shinsuke Nakazawa ,  Yuji Kato ,  Tatsuo Wakahara ,  Shigeki Shimanaka ,  Hiroshi Asano ,  Hiroshi Sasaki ,  Hiroshi Yamaguchi ,  Kazuhiro Ishigami ,  Shinich Takenouchi

发明人： Shinsuke Nakazawa ,  Yuji Kato ,  Tatsuo Wakahara ,  Shigeki Shimanaka ,  Hiroshi Asano ,  Hiroshi Sasaki ,  Hiroshi Yamaguchi ,  Kazuhiro Ishigami ,  Shinich Takenouchi

IPC分类号： F02D41/12

CPC分类号： F02D41/126 ,  Y10T477/675

摘要： A system and method for controlling an operation of an internal combustion engine of a vehicle having an automatic transmission in which at least one of predetermined fuel supply recovery engine revolution speed or predetermined fuel supply cut-off engine revolution speed is varied during the engine deceleration condition according to a state of operation of the automatic transmission. In the first preferred embodiment, a downshift operation of the automatic transmission is detected. In the second preferred embodiment, an overrun clutch solenoid is turned on (energized). In the latter case, both fuel supply recovery and fuel supply cut-off engine revolution speeds are set to higher values than those when the clutch solenoid is turned off (deenergized).

摘要翻译： 一种用于控制具有自动变速器的车辆的内燃机的操作的系统和方法，其中在发动机减速条件期间，预定燃料供给恢复引擎转速或预定燃料供给切断发动机转速中的至少一个变化 根据自动变速箱的运转状态。 在第一优选实施例中，检测自动变速器的降档操作。 在第二优选实施例中，超速离合器螺线管被接通（通电）。 在后一种情况下，燃料供应恢复和燃料供应切断发动机转速都设定为比离合器电磁阀关闭（断电）时更高的值。

公开(公告)号：US5145045A

公开(公告)日：1992-09-08

申请号：US797194

申请日：1991-11-25

申请人： Tatsuo Wakahara

发明人： Tatsuo Wakahara

IPC分类号： F16H61/14

CPC分类号： F16H61/143

摘要： A control system for a lock-up clutch of an automatic transmission is provided which serves to change a variation rate of control pressure between partial engagement operation and full engagement operation, which adjusts a degree of lock-up clutch engagement. The system includes a lock-up control valve and a switching valve. The lock-up control valve is responsive to hydraulic pressure input to a first pilot port which is lower than a preselected threshold level to vary a pressure difference between apply and release chambers gradually at a first rate to establish disengagement or partial engagement of the lock-up clutch. The switching valve is responsive to hydraulic pressure input to a pilot port which is higher than a preselected threshold level to provide pilot pressure of a preselected level to a second pilot port of the lock-up control valve. The lock-up control valve is responsive to input of pressure into first and second pilot ports to vary the pressure difference between the apply and release chambers at a second rate greater than the first rate to establish full engagement of the lock-up clutch.

摘要翻译： 提供一种用于自动变速器的锁止离合器的控制系统，其用于改变部分接合操作和完全接合操作之间的控制压力的变化率，其调节锁止离合器接合程度。 该系统包括锁定控制阀和切换阀。 锁定控制阀响应于低于预先选择的阈值水平的第一先导口的液压输入，以逐渐以第一速率改变施加室和释放室之间的压力差，以建立锁定 - 离合器。 切换阀响应于高于预选阈值水平的先导端口的液压输入，以向锁定控制阀的第二先导端口提供预选级别的先导压力。 锁定控制阀响应于将压力输入到第一和第二先导端口中，以以大于第一速率的第二速率改变施加和释放室之间的压力差，以建立锁止离合器的完全接合。

公开(公告)号：US5115694A

公开(公告)日：1992-05-26

申请号：US727246

申请日：1991-07-11

申请人： Hiroshi Sasaki ,  Shinsuke Nakazawa ,  Yuji Kato ,  Tatsuo Wakahara ,  Shigeki Shimanaka ,  Hiroshi Asano ,  Hiroshi Yamaguchi ,  Kazuhiro Ishigami ,  Shinichi Takenouchi

发明人： Hiroshi Sasaki ,  Shinsuke Nakazawa ,  Yuji Kato ,  Tatsuo Wakahara ,  Shigeki Shimanaka ,  Hiroshi Asano ,  Hiroshi Yamaguchi ,  Kazuhiro Ishigami ,  Shinichi Takenouchi

IPC分类号： F16D48/02 ,  F16H59/72 ,  F16H59/78 ,  F16H61/00 ,  F16H61/04

CPC分类号： F16H59/72 ,  F16H61/0021 ,  F16H59/78 ,  Y10T477/653

摘要： A hydraulic pressure, i.e., a line pressure, of a hydraulic fluid supplied from an engine driven pump toward a hydraulically actuable coupling of an automatic transmission is held at the maximum pressure value when a temperature of an automatic transmission oil is less than a predetermined temperature value. However, the hydraulic pressure is temporarily decreased from the maximum pressure value to the minimum pressure value for a period of time after cranking of the engine when the transmission oil temperature is lower than the predetermined temperature value. Owing to a decreased load on the engine by the oil pump, smooth cranking and subsequent warming-up operation of the engine is assured under cold whether condition when the automatic transmission oil temperature is lower than the predetermined temperature value.

摘要翻译： 当自动变速器油的温度低于预定温度时，从发动机驱动泵向自动变速器的可液压致动的联接器供应的液压油的液压，即管路压力保持在最大压力值 值。 然而，当变速器油温度低于预定温度值时，液压在发动机起动之后的一段时间内从最大压力值暂时降低到最小压力值。 由于油泵在发动机上的负载减小，因此，无论自动变速箱油温度是否低于规定的温度值，在冷空气的情况下，能够平稳地起动发动机的加热运转。

公开(公告)号：US06419059B1

公开(公告)日：2002-07-16

申请号：US09688243

申请日：2000-10-16

申请人： Hisao Nobu ,  Tatsuo Wakahara

发明人： Hisao Nobu ,  Tatsuo Wakahara

IPC分类号： F16H6114

CPC分类号： F16H57/04 ,  F16H61/143 ,  F16H2045/021

摘要： A lock-up control device controls a lock-up clutch in a torque converter. The lock-up clutch is engaged by supplying a lock-up control pressure. The torque converter transmits torque via oil in a torque converter chamber when the lock-up clutch is disengaged, and transmits torque directly when the lock-up clutch is engaged. In the lock-up state, the oil pressure in the torque converter chamber is decreased by discharging oil in the torque converter chamber. By providing a circuit which leads oil discharged from the torque converter chamber to a lubricating part of the transmission, the balance between the inflowing oil amount and outflowing oil amount is improved, and oil insufficiency is prevented.

摘要翻译： 锁定控制装置控制变矩器中的锁止离合器。 锁止离合器通过提供锁定控制压力接合。 当锁止离合器分离时，变矩器在变矩器室中通过油传递扭矩，并且当锁止离合器接合时，转矩直接传递。 在锁定状态下，通过在变矩器室中排出油来减小变矩器室中的油压。 通过设置将从变矩器室排出的油引导到变速器的润滑部的回路，能够提高流入油量与流出油量之间的平衡，防止油不足。

公开(公告)号：US06375591B1

公开(公告)日：2002-04-23

申请号：US09691847

申请日：2000-10-18

申请人： Tatsuo Wakahara ,  Kenichiro Murakami

发明人： Tatsuo Wakahara ,  Kenichiro Murakami

IPC分类号： F16H6112

CPC分类号： F16H61/12 ,  F16H59/68 ,  F16H2059/683 ,  F16H2061/0209 ,  F16H2061/1208 ,  F16H2061/1264 ,  F16H2061/1268

摘要： A valve (13, 14) causes fluid pressures to act individually on plural frictional elements (A, B) of an automatic transmission so as to selectively lock the rotation of the frictional elements (A, B). A control unit (21) determines that the automatic transmission has an interlock tendency when the fluid pressures acting on the frictional elements (A, B) detected by pressure sensors (24, 25) are both equal to or greater than a predetermined pressure. Completion of a gear position change-over is detected by a sensor (23, 26), and the control unit (21) does not determine the interlock tendency until a predetermined time &Dgr;t has elapsed after the gear position change-over is complete. In this way, an incorrect determination is prevented by avoiding the determination in a period when the pressures are unstable in a period immediately after the gear position change-over of the automatic transmission.

摘要翻译： 阀（13,14）使得流体压力分别作用在自动变速器的多个摩擦元件（A，B）上，以便选择性地锁定摩擦元件（A，B）的旋转。 当由压力传感器（24,25）检测到的作用在摩擦元件（A，B）上的流体压力均等于或大于预定压力时，控制单元（21）确定自动变速器具有互锁倾向。 通过传感器（23,26）检测到齿轮位置切换的完成，并且控制单元（21）在齿轮位置转换完成之后直到经过了预定时间DELTAt之后才确定联锁倾向。 以这种方式，通过避免在自动变速器的档位切换之后的时间段内的压力不稳定的期间中，可以防止错误的判定。