Exhaust treatment system
AssigneeCaterpillar Inc.
InventorsCornelius N. Opris, John P. Timmons, Mari Lou Balmer-Millar, Cho Y. Liang, Anil Raina
Life of this patent
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Abstract
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.
Claims45
An exhaust treatment system of a power source, comprising:
- a filter having a housing with an inlet and an outlet;
- a regeneration device disposed outside of the housing of the filter and fluidly connected to the inlet of the housing;
- a supply line configured to assist in directing a flow comprising recirculated exhaust and ambient air to the regeneration device;
- and
- an exhaust line configured to assist in directing a portion of a filtered flow of exhaust from the filter outlet to the power source.
An exhaust treatment system of a combustion engine, comprising:
- a filter;
- a regeneration device fluidly connected to the filter and configured to selectively assist in increasing the temperature of an entire exhaust flow of the combustion engine to a desired temperature;
- a supply line configured to assist in directing a flow comprising recirculated exhaust and ambient air to the regeneration device;
- and
- an exhaust line configured to direct a portion of a filtered flow of exhaust from the filter to the combustion engine.
A method of removing matter from a filter of a combustion engine, comprising:
- reducing the pressure of an exhaust flow of the engine;
- injecting a combustible substance into the exhaust flow upstream of the filter;
- igniting the combustible substance;
- filtering the exhaust flow and directing at least a first portion of the filtered flow to an inlet of the engine;
- and
- directing a supply flow to a regeneration device disposed upstream of the filter, the supply flow comprising a second portion of the filtered flow and ambient air.
Dependencies are inferred from the claim text.