公开(公告)号：US12234845B1

公开(公告)日：2025-02-25

申请号：US18516414

申请日：2023-11-21

Applicant: Caterpillar Inc.

Inventor： Royce E. Leaders ,  Alex M. Fullenkamp

IPC: F15B21/08 ,  E02F9/22 ,  F15B11/16 ,  E02F9/20

Abstract: An electric powertrain for a machine includes an electric power source. The powertrain further includes an implement pump for powering a work implement and an implement pump electric motor. An electric traction motor is operably coupled to a traction device. An electronic controller stores a plurality of rimpull torque curves. The electronic controller is configured to determine if the electric power source is in a power limited condition and upon determining that the electric power source is in a power limited condition act to derate a rimpull torque of the traction device from a first rimpull torque curve of the plurality of rimpull torque curves to a lower second rimpull torque curve of the plurality of rimpull torque curves, wherein the selection of the second rimpull torque curve is based on a power usage by the implement pump electric motor.

公开(公告)号：US20240125381A1

公开(公告)日：2024-04-18

申请号：US17966056

申请日：2022-10-14

Applicant: Caterpillar Inc.

Inventor： Brian E. Lister ,  Michael D. Beyer ,  Alex M. Fullenkamp

IPC: F16H57/04 ,  E02F9/20

CPC classification number: F16H57/0439 ,  E02F9/202 ,  E02F9/2095

Abstract: A mobile machine can include a traction powertrain configured to operate on electrical power and which includes a traction motor coupled to a transmission. To lubricate the transmission, the mobile machine can include a lubrication system having a lubricant pump coupled with a pump motor. The traction motor and the pump motor are electrically arranged in parallel with each other. A powertrain sensor monitors rotational motion in the traction powertrain and an electronic controller can generate a lubricant supply command directing the lubricant pump to deliver a first lubricant quantity to the transmission.