公开(公告)号：US11174905B1

公开(公告)日：2021-11-16

申请号：US17101173

申请日：2020-11-23

Applicant: Caterpillar Inc.

Inventor： Konrad Garrett ,  Aaron Benjamin Crabtree ,  Michael David Beyer ,  Gaurav Vasudeva ,  Brian Eugene Lister

IPC: F16D48/02 ,  F16H61/12 ,  F16H61/28

Abstract: A transmission for a machine is disclosed. The transmission may comprise a first torque path for transmission of torque from an input shaft to an output shaft, and a single clutch element along the first torque path. The transmission may further comprise a clutch actuator configured to actuate engagement of the clutch element, and a clutch pressure control (CPC) valve configured to permit a flow of hydraulic fluid to the clutch actuator when in an open position to cause the clutch actuator to actuate engagement of the clutch element. The transmission may further comprise a FMR valve having a failure position obstructing flow of the hydraulic fluid from the CPC valve to the clutch actuator when the CPC valve is in the open position. The FMR valve actuated by pilot pressure from a CPC valve that controls actuation of other clutch elements that are not on the first torque path.

公开(公告)号：US08920276B2

公开(公告)日：2014-12-30

申请号：US13785781

申请日：2013-03-05

Applicant: Caterpillar Inc.

Inventor： Russell Ross Henderson, Jr. ,  Abdul Karim Maoued ,  Aaron Benjamin Crabtree

IPC: F16H47/04 ,  F16H47/08

CPC classification number: F16H47/04 ,  F16H3/722

Abstract: A controller is provided for varying gear ratios in a transmission system including at least one planetary gear train disposed within a housing. The controller includes a ratio control gear set, a ratio control pump, and a relief valve. The ratio control gear set includes a sun gear, a planet carrier, and a ring gear. The planet carrier is configured to rotatably connect to an output shaft of an engine. The ring gear is configured to mesh with a sun gear of the planetary gear train. The ratio control pump includes a body configured to rigidly connect to the housing, and a rotor rigidly coupled to the sun gear of the ratio control gear set. The rotor is configured to co-act with the body to pump fluid. The relief valve is configured to restrict fluid egress from the ratio control pump.

Abstract translation: 提供了一种控制器，用于在包括设置在壳体内的至少一个行星齿轮系的传动系统中变化齿轮比。 控制器包括比率控制齿轮组，比率控制泵和安全阀。 比率控制齿轮组包括太阳齿轮，行星架和齿圈。 行星架被构造成可旋转地连接到发动机的输出轴。 齿圈构造成与行星齿轮系的太阳轮啮合。 比率控制泵包括构造成刚性地连接到壳体的主体和刚性地联接到比率控制齿轮组的太阳齿轮的转子。 转子构造成与身体共同泵送流体。 减压阀被配置为限制流量从比率控制泵排出。

公开(公告)号：US20140256491A1

公开(公告)日：2014-09-11

申请号：US13785781

申请日：2013-03-05

Applicant: CATERPILLAR INC.

Inventor： Russell Ross Henderson, JR. ,  Abdul Karim Maoued ,  Aaron Benjamin Crabtree

IPC: F16H47/04

CPC classification number: F16H47/04 ,  F16H3/722

Abstract: A controller is provided for varying gear ratios in a transmission system including at least one planetary gear train disposed within a housing. The controller includes a ratio control gear set, a ratio control pump, and a relief valve. The ratio control gear set includes a sun gear, a planet carrier, and a ring gear. The planet carrier is configured to rotatably connect to an output shaft of an engine. The ring gear is configured to mesh with a sun gear of the planetary gear train. The ratio control pump includes a body configured to rigidly connect to the housing, and a rotor rigidly coupled to the sun gear of the ratio control gear set. The rotor is configured to co-act with the body to pump fluid. The relief valve is configured to restrict fluid egress from the ratio control pump.

Abstract translation: 提供了一种控制器，用于在包括设置在壳体内的至少一个行星齿轮系的传动系统中变化齿轮比。 控制器包括比率控制齿轮组，比率控制泵和安全阀。 比率控制齿轮组包括太阳齿轮，行星架和齿圈。 行星架被构造成可旋转地连接到发动机的输出轴。 齿圈构造成与行星齿轮系的太阳轮啮合。 比率控制泵包括构造成刚性地连接到壳体的主体和刚性地联接到比率控制齿轮组的太阳齿轮的转子。 转子构造成与身体共同泵送流体。 减压阀被配置为限制流量从比率控制泵排出。