公开(公告)号：US20230347858A1

公开(公告)日：2023-11-02

申请号：US18026709

申请日：2021-09-13

Applicant: Caterpillar SARL

Inventor： Steven Edward JOHNSON ,  Adam J. ADEEB

IPC: B60T13/62 ,  B60T13/68 ,  B60T7/12 ,  B60T7/04

CPC classification number: B60T13/62 ,  B60T13/686 ,  B60T7/12 ,  B60T7/04 ,  B60T2270/10 ,  B60T2270/30 ,  B60T2270/402

Abstract: A brake system for a machine, where an operator brake valve is controllable by an operator input device and an automatic brake valve is controllable by a control system. A control valve is connected to a brake and the operator and automatic brake valves and operated by the control system between an operator brake configuration fluidly connecting the operator brake valve to the brake and an automatic brake configuration fluidly connecting the automatic brake valve to the brake in an operator braking mode, the control valve provides that the brake is controllable in response to an input to the operator input device. In an automatic braking mode the control valve provides that the brake is controllable in response to a control signal from the control system.

公开(公告)号：US20230167760A1

公开(公告)日：2023-06-01

申请号：US17911187

申请日：2021-03-02

Applicant: Caterpillar SARL

Inventor： Steven JOHNSON ,  Adam J. ADEEB ,  Samantha L. SERGOTT ,  Umakanth SAKARAY

IPC: F01P7/04 ,  B60K11/04 ,  B60K11/06 ,  F01P5/04

CPC classification number: F01P7/044 ,  B60K11/04 ,  B60K11/06 ,  F01P5/04

Abstract: Two cooling fans acting on different heat exchangers may be driven via parallel circuits from a variable displacement hydraulic pump. At least one of the circuits includes a two position valve operable by a control system to vary the flow resistance of the circuit to share the flow between the two fan motors responsive to the relative heat load on the heat exchangers. The pump displacement is controlled to provide a constant hydraulic output pressure irrespective of the operational state of the or each valve assembly.

公开(公告)号：US20230166790A1

公开(公告)日：2023-06-01

申请号：US17922744

申请日：2021-04-16

Applicant: Caterpillar SARL

Inventor： Matthew Lee DIXON ,  Steven Edward JOHNSON ,  Adam J. ADEEB

IPC: B62D5/12 ,  B62D12/00 ,  B62D5/06 ,  B62D5/09 ,  F15B15/14

CPC classification number: B62D5/12 ,  B62D5/09 ,  B62D5/061 ,  B62D12/00 ,  F15B15/1447

Abstract: A steering system for an articulated truck. The articulated truck is formed of a tractor and a trailer and an articulation joint. The steering system includes a hydraulic cylinder, with a cylinder barrel and a piston. The steering system provides for changes in angle between the tractor and the trailer. The hydraulic cylinder includes a snubbing tube projecting into the cylinder barrel. A hydraulic fluid passage opens into the cylinder barrel within the snubbing tube. The snubbing tube includes a main slot and a plurality of channels each extending between an interior and an exterior of the snubbing tube. The plurality of channels have a cross sectional area smaller than a cross sectional area of the main slot. When the articulated truck is steered, the piston moves in the cylinder barrel and the snubbing tube dampens the movement to prevent forces generated by the piston damaging the articulated truck.