Patent ID: 11920677
Assignee: CATERPILLAR INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A system, the system comprising:
a gearbox, the gearbox including:
a gearbox housing having a first gearbox fluid passage and a second gearbox fluid passage, the first and second gearbox fluid passages being integrated into the gearbox housing, and
a plurality of clutch members; and

a hydraulic machine connected to the gearbox by a working fluid circuit, the hydraulic machine including:
a case having a first hydraulic machine fluid passage and a second hydraulic machine fluid passage, the first and second hydraulic machine fluid passages being integrated into the case, and
a set of rotating elements enclosed within the case,

wherein the first gearbox fluid passage and the first hydraulic machine fluid passage are aligned in one-to-one correspondence to form a feed passage, the feed passage configured to conduct fluid at a first pressure from a first source to the set of rotating elements, wherein the second gearbox fluid passage and the second hydraulic machine fluid passage are aligned in one-to-one correspondence to form a charge passage, the charge passage configured to conduct fluid at a second pressure from a second source to the set of rotating elements, and wherein the first pressure is less than the second pressure.