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公开(公告)号：US07891458B2
公开(公告)日：2011-02-22
申请号：US12303288
申请日：2007-12-07
IPC分类号： B62D5/06
摘要： A priority valve 7 is disposed between a hydraulic pump 2 and a steering valve 4 and is used to supply priority steering cylinders 103a and 103b with pressurized oil discharged from the hydraulic pump 2 by controlling the differential pressure across a meter-in hydraulic line of the steering valve 4 such that the differential pressure is kept at a target value. A pressure sensor 31 for detecting the load pressures of the steering cylinders 103a and 103b is provided. On the basis of the detected load pressures, the target value set for the priority valve 7 is modified by devices including a controller 32, a solenoid valve 33, a pilot hydraulic line 29, and a pressure receiving unit 24c of the priority valve 7. The above configuration enables suppression of a shock occurring at the start of turning of the steering wheel.
摘要翻译： 优先阀7设置在液压泵2和转向阀4之间，并且用于通过控制液压泵2的流入液压管路中的压差来向液压泵2排出的加压油供应优先转向缸103a和103b。 转向阀4使差压保持在目标值。 设置有用于检测转向缸103a，103b的负载压力的压力传感器31。 基于检测到的负载压力，通过包括优先阀7的控制器32，电磁阀33，先导液压管路29和压力接收单元24c的装置来改变对优先阀7设定的目标值。 上述结构能够抑制在方向盘转动开始时发生的冲击。
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公开(公告)号：US20090255750A1
公开(公告)日：2009-10-15
申请号：US12303288
申请日：2007-12-07
摘要： A priority valve 7 is disposed between a hydraulic pump 2 and a steering valve 4 and is used to supply priority steering cylinders 103a and 103b with pressurized oil discharged from the hydraulic pump 2 by controlling the differential pressure across a meter-in hydraulic line of the steering valve 4 such that the differential pressure is kept at a target value. A pressure sensor 31 for detecting the load pressures of the steering cylinders 103a and 103b is provided. On the basis of the detected load pressures, the target value set for the priority valve 7 is modified by devices including a controller 32, a solenoid valve 33, a pilot hydraulic line 29, and a pressure receiving unit 24c of the priority valve 7. The above configuration enables suppression of a shock occurring at the start of turning of the steering wheel.
摘要翻译： 优先阀7设置在液压泵2和转向阀4之间，并且用于通过控制液压泵2的流入液压管路中的压差来向液压泵2排出的加压油供应优先转向缸103a和103b。 转向阀4使差压保持在目标值。 设置有用于检测转向缸103a，103b的负载压力的压力传感器31。 基于检测到的负载压力，通过包括优先阀7的控制器32，电磁阀33，先导液压管路29和压力接收单元24c的装置来改变对优先阀7设定的目标值。 上述结构能够抑制在方向盘转动开始时发生的冲击。
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公开(公告)号：US07841307B2
公开(公告)日：2010-11-30
申请号：US11909325
申请日：2006-10-24
IPC分类号： F01P7/02
CPC分类号： E02F9/226 , F01P7/044 , F01P2023/08 , F01P2025/62 , F01P2025/66
摘要： In a cooling fan drive system for a travel type working machine, the rotational speed of a cooling fan is controlled to the optimum rotational speed in accordance with temperature increase of the temperature of an engine cooling water, and the engine rotational speed is smoothly increased when the engine rotational speed is increased under travel acceleration. A fourth fan target rotational speed calculator 35e and a minimum value selector 35f are provided, and under non-operation, the fan target rotational speed is set to a low rotational speed irrespective of the temperature. When an acceleration pedal 12 is depressed to increase the rotational speed of the engine under travel acceleration, the increase of the drive pressure of a hydraulic motor 23 due to increase of the rotation of the cooling fan 9 is suppressed, and the load on the engine 1 is reduced.
摘要翻译： 在用于行驶式加工机的冷却风扇驱动系统中，根据发动机冷却水的温度升高将冷却风扇的转速控制到最佳转速，并且当发动机转速为 发动机转速在行驶加速度下增加。 提供第四风扇目标转速计算器35e和最小值选择器35f，并且在不工作的情况下，将风扇目标转速设定为低转速而与温度无关。 当加速踏板12被按压以增加发动机在行驶加速度下的转速时，由于冷却风扇9的旋转增加而导致的液压马达23的驱动压力的增加被抑制，并且发动机上的负荷 1减少。
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公开(公告)号：US20090025661A1
公开(公告)日：2009-01-29
申请号：US11909325
申请日：2006-10-24
IPC分类号： F01P7/04
CPC分类号： E02F9/226 , F01P7/044 , F01P2023/08 , F01P2025/62 , F01P2025/66
摘要： In a cooling fan drive system for a travel type working machine, the rotational speed of a cooling fan is controlled to the optimum rotational speed in accordance with temperature increase of the temperature of an engine cooling water, and the engine rotational speed is smoothly increased when the engine rotational speed is increased under travel acceleration. A fourth fan target rotational speed calculator 35e and a minimum value selector 35f are provided, and under non-operation, the fan target rotational speed is set to a low rotational speed irrespective of the temperature. When an acceleration pedal 12 is depressed to increase the rotational speed of the engine under travel acceleration, the increase of the drive pressure of a hydraulic motor 23 due to increase of the rotation of the cooling fan 9 is suppressed, and the load on the engine 1 is reduced.
摘要翻译： 在用于行驶式加工机的冷却风扇驱动系统中，根据发动机冷却水的温度升高将冷却风扇的转速控制到最佳转速，并且当发动机转速为 发动机转速在行驶加速度下增加。 提供第四风扇目标转速计算器35e和最小值选择器35f，并且在不工作的情况下，将风扇目标转速设定为低转速而与温度无关。 当加速踏板12被按压以增加发动机在行驶加速度下的转速时，由于冷却风扇9的旋转增加而导致的液压马达23的驱动压力的增加被抑制，并且发动机上的负荷 1减少。
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