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1. (WO2018128772) LUBRICATION SYSTEM FOR A GEARBOX OF A TRANSMISSION SYSTEM

Pub. No.:    WO/2018/128772    International Application No.:    PCT/US2017/066650
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Sat Dec 16 00:59:59 CET 2017
IPC: F16H 61/4139
F16H 57/04
Applicants: CATERPILLAR INC.
Inventors: SOMERS, Trevor, W.
MOBERG, Carl, J.
VOβ, Dirk
KÜHNEMUND, Frank, K.
Title: LUBRICATION SYSTEM FOR A GEARBOX OF A TRANSMISSION SYSTEM
Abstract:
A lubrication system for a gearbox of a transmission system includes an outlet line (206, 208) that is configured to allow an egress of oil from the gearbox (202). The lubrication system also includes a scavenging pump (218, 220) that is fluidly coupled with the outlet line and configured to draw oil from the gearbox via the outlet line. The lubrication system further includes a pressure sensor (264, 266) that is disposed in the outlet line and located upstream of the scavenging pump. The pressure sensor is configured to measure a pressure of fluid entering the scavenging pump. The lubrication system further includes a controller (262) that is communicably coupled to the pressure sensor and the scavenging pump. The controller is configured to vary a displacement of fluid from the scavenging pump based on a comparison of the pressure of fluid entering the scavenging pump as measured by the pressure sensor with at least one pre-determined threshold value.