公开(公告)号：US09416779B2

公开(公告)日：2016-08-16

申请号：US14223698

申请日：2014-03-24

Applicant: Caterpillar Inc.

Inventor： Corey L. Gorman ,  Adam Nackers ,  Jeremiah C. Johnson ,  John J. Krone

IPC: E02F9/22 ,  F04B49/06 ,  F04B49/08 ,  F04B49/22

CPC classification number: F04B49/065 ,  E02F9/2228 ,  E02F9/2235 ,  E02F9/2292 ,  E02F9/2296 ,  F03C1/0678 ,  F04B1/26 ,  F04B23/06 ,  F04B49/08 ,  F04B49/22 ,  F04B2205/06 ,  F04B2205/09

Abstract: Method of controlling multiple variable displacement hydraulic pumps determined relative to operator commands. If non-second-pump-dominated command, a respective adjusted displacement request is determined based upon the lesser of the operator requested torque limited displacement and an adjusted torque limited displacement that calculated based upon and the torque limited displacement of the respective pump and a scaling factor calculated based upon the first relief valve set pressure and respective pump pressure. If second-pump-dominated command, the set pressure of a relief valve associated with one of the pumps is instead utilized in calculating the scaling factor in the above strategy.

Abstract translation: 控制多个可变排量液压泵相对于操作者指令确定的方法。 如果以非二次泵为主的命令，则基于操作者所要求的扭矩限制位移和基于相应泵的扭矩限制位移计算的调整的转矩限制位移和缩放比例 基于第一安全阀设定压力和相应的泵压力计算的系数。 如果以二泵为主的指令，则在上述策略中计算缩放因子时，代替使用与其中一个泵相关的溢流阀的设定压力。

公开(公告)号：US20140056730A1

公开(公告)日：2014-02-27

申请号：US14072121

申请日：2013-11-05

Applicant: Caterpillar Inc.

Inventor： Wayne Fritz ,  Jeremiah C. Johnson

IPC: F04B1/20

CPC classification number: F04B1/2035 ,  F04B19/025 ,  F04B53/162 ,  Y10T29/49236

Abstract: The present disclosure sets forth an axial piston pump barrel. The axial piston pump barrel is provided with cylinders, antechambers, and fluid flow apertures which are uniquely shaped and dimensioned so as to increase the overall flowability and expulsion rate of a piston pump. By providing curvilinear transition zones and fluid flow apertures, the cylinders can be completely filled and pressurized even at the extremely high pressures and RPMs required by modem machines. Such machines may include front-end loaders, excavators, pipe layers, graders, and the like wherein such pumps can be used to power hydraulic cylinders moving the implements, work arms and other tools associated with such machines.

Abstract translation: 本公开内容提出了一种轴向柱塞泵筒。 轴向柱塞泵筒设置有气缸，前室和流体流动孔，其具有独特的形状和尺寸，以增加活塞泵的整体流动性和排出速率。 通过提供曲线过渡区和流体流通孔，即使在现代机器所需的极高压力和RPM下，气缸也可以完全充满和加压。 这样的机器可以包括前端装载机，挖掘机，管道层，平地机等，其中这种泵可用于为移动工具，工作臂和与这种机器相关联的其它工具的液压缸提供动力。

公开(公告)号：US09151280B2

公开(公告)日：2015-10-06

申请号：US14072121

申请日：2013-11-05

Applicant: Caterpillar Inc.

Inventor： Wayne Fritz ,  Jeremiah C. Johnson

IPC: F04B1/12 ,  F04B1/20 ,  F04B19/02 ,  F04B53/16

CPC classification number: F04B1/2035 ,  F04B19/025 ,  F04B53/162 ,  Y10T29/49236

Abstract: The present disclosure sets forth an axial piston pump barrel. The axial piston pump barrel is provided with cylinders, antechambers, and fluid flow apertures which are uniquely shaped and dimensioned so as to increase the overall flowability and expulsion rate of a piston pump. By providing curvilinear transition zones and fluid flow apertures, the cylinders can be completely filled and pressurized even at the extremely high pressures and RPMs required by modem machines. Such machines may include front-end loaders, excavators, pipe layers, graders, and the like wherein such pumps can be used to power hydraulic cylinders moving the implements, work arms and other tools associated with such machines.

Abstract translation: 本公开内容提出了一种轴向柱塞泵筒。 轴向柱塞泵筒设置有气缸，前室和流体流动孔，其具有独特的形状和尺寸，以增加活塞泵的整体流动性和排出速率。 通过提供曲线过渡区和流体流通孔，即使在现代机器所需的极高压力和RPM下，气缸也可以完全充满和加压。 这样的机器可以包括前端装载机，挖掘机，管道层，平地机等，其中这种泵可用于为移动工具，工作臂和与这种机器相关联的其它工具的液压缸提供动力。

公开(公告)号：US20150267697A1

公开(公告)日：2015-09-24

申请号：US14223698

申请日：2014-03-24

Applicant: Caterpillar Inc.

Inventor： Corey L. Gorman ,  Adam Nackers ,  Jeremiah C. Johnson ,  John J. Krone

IPC: F04B49/06 ,  F04B49/22 ,  E02F9/22 ,  F04B49/08

CPC classification number: F04B49/065 ,  E02F9/2228 ,  E02F9/2235 ,  E02F9/2292 ,  E02F9/2296 ,  F03C1/0678 ,  F04B1/26 ,  F04B23/06 ,  F04B49/08 ,  F04B49/22 ,  F04B2205/06 ,  F04B2205/09

Abstract: Method of controlling multiple variable displacement hydraulic pumps determined relative to operator commands. If non-second-pump-dominated command, a respective adjusted displacement request is determined based upon the lesser of the operator requested torque limited displacement and an adjusted torque limited displacement that calculated based upon and the torque limited displacement of the respective pump and a scaling factor calculated based upon the first relief valve set pressure and respective pump pressure. If second-pump-dominated command, the set pressure of a relief valve associated with one of the pumps is instead utilized in calculating the scaling factor in the above strategy.

Abstract translation: 控制多个可变排量液压泵相对于操作者指令确定的方法。 如果以非二次泵为主的命令，则基于操作者所要求的扭矩限制位移和基于相应泵的扭矩限制位移计算的调整的转矩限制位移和缩放比例 基于第一安全阀设定压力和相应的泵压力计算的系数。 如果以二泵为主的指令，则在上述策略中计算缩放因子时，代替使用与其中一个泵相关的溢流阀的设定压力。