Cummins Emission Solutions Inc.

Cummins Inc.

David Lee Dunnuck

Z Gerald Liu

Achuth Munnannur

Niklas M Schmidt

Apoorv Kalyankar

Sumit Bhargava

A vane swirl mixer for exhaust aftertreatment includes: a vane swirl mixer inlet; a vane swirl mixer outlet; a first flow device including: a Venturi body; a plurality of upstream vanes positioned within the Venturi body; a plurality of upstream vane apertures interspaced between the plurality of upstream vanes; a plurality of downstream vanes positioned within the Venturi body; and a plurality of downstream vane apertures interspaced between the plurality of downstream vanes. At least one of the upstream vane hub and the downstream vane hub is radially offset from a Venturi center axis, thereby causing individual ones of the plurality of vanes coupled to the radially offset vane hub to differ in their geometry.

Systems and methods for mixing exhaust gases and reductant in an aftertreatment system

A humidity compensation system for an internal combustion engine includes a humidity sensor sensing relative humidity of intake air, a temperature sensor sensing intake air temperature, a pressure sensor sensing intake air pressure and a control circuit computing a specific humidity (SH) value based on the sensor outputs. The control circuit is configured to compute one or more of an adjusted air-to-fuel ratio command as a function of SH and a default air-to-fuel ratio command, an adjusted ignition timing command as a function of SH, engine speed and a default ignition timing command and an adjusted boost pressure command as a function of SH and a default boost pressure command. The control circuit is operable to control any of fueling, ignition timing and boost pressure based on the corresponding adjusted air-to-fuel ratio, ignition timing and boost pressure commands to thereby compensate for humidity effects on engine operation.

Humidity compensation system for an internal combustion engine

Growing community of inventors

Columbus, IN, United States of America

David Lee Dunnuck