Cummins Inc.

Cummins Emission Solutions Inc.

Cummins Engine Company, Inc.

Fleetguard, Inc.

Cummins Filtration Inc.

James A Cramer

Aleksey Yezerets

Michael J Cunningham

Junhui Li

Salil H Marathe

Pourash G Patel

Daniel D Wilhelm

James C Clerc

Patrick Klein

Thomas A Grana

Yuetao Zhang

Joseph M Brault

Francois Ntone

Weiwen Wang

Emrah Arslanturk

Jeremiah C Nethercutt

Dipchand V Nishar

J David Dixon

Venkata R Lakkireddy

An aftertreatment system for reducing constituents of an exhaust gas having a sulfur content includes: an oxidation catalyst; a filter disposed downstream of the oxidation catalyst; and a controller configured to, in response to determining that the filter is to be regenerated and a desulfation condition being satisfied: cause a temperature of the oxidation catalyst to increase to a first regeneration temperature that is greater than or equal to 400 degrees Celsius and less than 550 degrees Celsius, cause the temperature of the oxidation catalyst to be maintained at the first regeneration temperature for a first time period, and after the first time period, cause the temperature of the oxidation catalyst to increase to a second regeneration temperature equal to or greater than 550 degrees Celsius.

Systems and methods for desulfation of catalysts included in aftertreatment systems

An aftertreatment system for reducing constituents of an exhaust gas having a sulfur content includes: an oxidation catalyst; a filter disposed downstream of the oxidation catalyst; and a controller configured, in response to determining that the filter is to be regenerated and a desulfation condition being satisfied, to: cause a temperature of the oxidation catalyst to increase to a first regeneration temperature that is greater than or equal to 400 degrees Celsius and less than 550 degrees Celsius; cause the temperature of the oxidation catalyst to be maintained at the first regeneration temperature for a first time period; and after the first time period, cause the temperature of the oxidation catalyst to increase to a second regeneration temperature equal to or greater than 550 degrees Celsius.

A method, controller, and internal combustion engine including the controller and operable in accordance with the method by: determining a temperature of a working liquid in an engine block circuit () of the internal combustion engine (), the working liquid comprising a cooling liquid or a lubrication liquid; operating the internal combustion engine (); engaging a thermal load responsive to the temperature of the liquid being below a first temperature threshold, wherein engaging the thermal load comprises at least one of increasing a pumping load of the internal combustion engine (), or changing an air/fuel ratio, thereby adding heat to the engine block circuit (); controlling the thermal load as a function of the temperature of the liquid; and disengaging at least a portion of the thermal load responsive to the temperature of the liquid being above the low temperature limit.

Internal combustion engine and method to increase the temperature of a liquid in the internal combustion engine

A system includes an exhaust aftertreatment system operatively coupled to an engine. The exhaust aftertreatment system includes an exhaust aftertreatment component. A flow sensor is structured to provide an exhaust flow rate value of exhaust gas exiting the engine. A temperature sensor is structured to provide an exhaust temperature value of the exhaust gas proximate the exhaust aftertreatment component. A controller includes an exhaust conditions circuit structured to interpret the exhaust flow rate value via operative communication with each of the flow sensor, and to interpret the exhaust temperature value via operative communication with the temperature sensor. A regeneration time circuit is structured to determine a regeneration time value based on each of the exhaust flow rate value and the exhaust temperature value via a regeneration time lookup table. A regeneration control circuit is structured to control regeneration of the exhaust aftertreatment component based on the regeneration time value.

Aftertreatment regeneration with variable time and temperature

A system, method and computer operable code is disclosed for reducing HC and liquid accumulation in an exhaust gas treatment system. A timer is used to monitor the amount of time the system spends in either absorption mode or desorption mode. If the exhaust gas temperature at the inlet of a oxidation catalyst device is below an absorption threshold, the timer is instructed to count up. If the exhaust gas temperature is above a desorption threshold, the timer is instructed to count down. At a predetermined timer threshold value, the engine is instructed to enter a thermal management mode operable to reduce accumulation of HC and liquid in the exhaust gas management system.

Adsorbed substance accumulation reduction for exhaust treatment equipment

A lobed exhaust diffuser apparatus, system, and method configured to cool exhaust gases from an internal combustion engine comprises a diffuser having a proximal end, configured to receive exhaust gases from the engine, and a distal end, configured to expel the exhaust gases into the atmosphere. A plurality of lobes are disposed on the distal end such that at least a portion of the exhaust gases pass through the lobes, increasing the interaction surface area between the exhaust gases and the atmosphere, allowing for more rapid diffusion and entrainment between exhaust gases and atmospheric gases, resulting in more rapid cooling of the exhaust gases.

Lobed exhaust diffuser apparatus, system, and method

An electronic air compressor control system and method including an actuator connected to an air compressor for regulating the loading and unloading of the air compressor based on predetermined conditions, a power supply electrically connected to the actuator for supplying a voltage thereto and a plurality of switches electrically coupled to the actuator and power supply for controlling the supply of voltage from the power supply to the actuator in order to control the operation of the air compressor based on a predetermined air compressor exhaust temperature threshold and minimum and maximum pressure thresholds. The unloading and loading of the air compressor is based on a predetermined air compressor exhaust temperature when the pressure within the wet tank is between the minimum pressure threshold and the maximum pressure threshold.

System and method for electronic air compressor control

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Columbus, IN, United States of America

James A Cramer