Caterpillar Inc.

Scott A Snoble

Thomas L Atwell

Thomas Alan Brosowske

Aaron J Weber

Joseph R Derk

Dongming Tan

Joseph Lee Kennedy

Dwight V Stone

Bradley W Hodges

Albert Yueh-Chang Lee

Zheng Zhang

Cristian V Striletchi

This disclosure describes an exhaust assembly that includes an exhaust tube and a coolant passage. The exhaust tube is oriented about an axis and an exhaust gas is configured to flow through the exhaust tube in a direction away from an end of the exhaust tube. The coolant passage is oriented about the axis radially outward of the exhaust tube, the coolant passage having an inner shell and an outer shell. The exhaust assembly further includes an expansion reservoir positioned vertically (relative to a gravitational reference) above the coolant passage. The expansion reservoir and coolant passage are fluidly coupled by a conduit having a first diameter. The expansion reservoir is coupled with a coolant reservoir by a second conduit having a diameter less than the first diameter. Vapor after a hot shutdown travels up the first conduit and is replaced by coolant flowing down the first conduit.

Exhaust assembly temperature regulation for shutdown

A compliant gear assembly for a gear train of an internal combustion engine includes a hub subassembly having a first hub component and a second hub component. The first hub component defines a first axis, and the compliant gear assembly includes a gear ring rotatable relative to the hub subassembly and defining a gear ring axis of rotation. The second hub component is movable relative to the first hub component in a direction normal to the first axis between a first stop position at which the gear ring axis of rotation is co-linear with the first axis and a second stop position at which the gear ring axis of rotation is parallel to but not co-linear with the first axis. A compliance mechanism is coupled between the first hub component and the second hub component and biases the second hub component toward the first stop position. Translating the second hub component relative to the first hub component in a direction normal to the first axis attenuates torque spikes induced for example via fuel injector actuation and/or cylinder firing in an engine gear train employing the compliant gear assembly.

Compliant gear assembly, engine and gear train operating method

A compliant gear assembly includes a gear ring positioned about a hub and configured to translate responsive to a torque on the gear assembly, and biased toward co-axial alignment with the hub via at least one actuator. A method of managing loads on an idler gear in the gear train is still further provided including translating the gear ring responsive to the torque on the idler gear. A work machine includes an engine having a housing and a geartrain mounted thereon, the geartrain including a crank gear, a cam gear and a compliant idler gear assembly.

Compliant gear assembly and work machine using same

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Pekin, IL, United States of America

Scott A Snoble