Caterpillar Inc.

Bradley W Hodges

Joseph Lee Kennedy

Chad Palmer Koci

Andrew Palmer

Dongming Tan

Scott A Snoble

Ryan Matthew Brown

Albert Yueh-Chang Lee

Zheng Zhang

Chetan Kulkarni

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

This disclosure describes, in part, systems and structures for 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 heat capacity of the volume of the coolant contained within the coolant passage is above a threshold ratio of a heat capacitance of a radiation shield, exhaust tube, and inner shell of the coolant passage to prevent coolant boiling after shutdown.

An exhaust assembly 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 end of the exhaust tube includes one or more holes permitting exhaust gas to flow around the end of the exhaust tube between an outer wall of the exhaust tube and the inner shell of the coolant passage to regulate a temperature of the inner shell of the coolant passage.

Exhaust assembly temperature regulation

Growing community of inventors

Dunlap, IL, United States of America

Bradley W Hodges