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US 2026/0160195 A1Published application
EXHAUST SYSTEM HAVING NOx SAMPLING DEVICE AND EXHAUST CONDUIT ASSEMBLY
AssigneeCaterpillar Inc.
InventorNathan Folger
Life of this patent
Estimating the term…
Abstract
An exhaust system for an internal combustion engine includes an exhaust conduit, and a NOx sampling device arranged to sample a stream of exhaust fed through the exhaust conduit to an exhaust outlet. The NOx sampling device will be coupled with a NOx sensor having a sensor probe fluidly connected to a mixing chamber in the NOx sampling device. A plurality of sampling flutes each form an exhaust feed passage to sample the exhaust at locations providing improved sensor reading accuracy.
Claims20
An exhaust system comprising:
- an exhaust conduit extending to an exhaust outlet;
- a NOx sampling device arranged to sample a stream of exhaust fed through the exhaust conduit to the exhaust outlet;
- and
- the NOx sampling device forming a mixing chamber, and including a plurality of sampling flutes each forming an exhaust feed passage extending from a respective at least one exhaust admission opening to the mixing chamber.
1 more element
A NOx sampling device comprising:
- a device body extending circumferentially around a center axis, and including an inner surface forming an exhaust conduit section for feeding exhaust to an exhaust outlet, and an outer surface;
- the device body further forming a mixing chamber arranged radially between the inner surface and the outer surface;
- and
- a plurality of sampling flutes positioned to be exposed to a feed of exhaust through the exhaust conduit section, and each forming a feed passage extending from a respective at least one exhaust admission opening to the mixing chamber.
1 more element
An exhaust conduit assembly comprising:
- a NOx sampling device including a device body extending circumferentially around a center axis, and having an inner surface forming an exhaust conduit section, and an outer surface;
- the device body further forming a mixing chamber, and including a plurality of sampling flutes arranged to feed exhaust from the exhaust conduit section to the mixing chamber;
- and
- a NOx sensor coupled to the device body and including a sensor probe fluidly connected to the mixing chamber.
1 more element
Dependencies are inferred from the claim text.