Caterpillar Inc.

Anil Raina

Steven J Funke

John Parker Timmons

Cornelius Nicolae Opris

Cho Y Liang

Michael Paul Withrow

Gregory Wayne Tomlins

Mari Lou Balmer-Millar

Chandini Muniratnam Ammineni

Daniel W Crosby

A method of operating an engine system includes compressing intake air, restricting exhaust flow from the engine via a flow restriction device, and supplying compressor air to a compressed air subsystem of the engine during restricting exhaust flow. Supplying of compressor air may occur by selectively actuating a pressure control device to fluidly connect an inlet of a compressed air subsystem with the compressor. An associated machine and engine system include a compressor, a flow restriction device, a compressed air subsystem and a pressure control device to selectively fluidly connect the compressed air subsystem with the compressor when the flow restriction device is in a relatively more closed configuration.

Machine, engine system and operating method

A method for altering an operating condition of a filter includes actively increasing the temperature of the filter to a desired temperature below a regeneration temperature and sensing a filter operating condition at about the desired temperature. The method also includes comparing the sensed filter operating condition to an expected filter operating condition range and actively increasing the temperature of the filter to the regeneration temperature in response to the comparison.

Regeneration strategy

An exhaust treatment system of a power source includes a filter having a housing with an inlet and an outlet, and a regeneration device disposed outside of the housing of the filter. The regeneration device is fluidly connected to the inlet of the housing. The exhaust treatment system also includes an exhaust line configured to assist in directing a portion of a filtered flow of exhaust from the filter outlet to the power source.

Exhaust treatment system

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Chillicothe, IL, United States of America

Anil Raina