Cummins Emission Solutions Inc.

Cummins Filtration Ip, Inc.

Cummins Inc.

Cummins Ip, Inc.

Cummins Filtration Inc.

Cummins Engine Company, Inc.

Fleetguard, Inc.

Cummins Power Generation Ip, Inc.

Daniel D Wilhelm

Xiao Lin

Yuetao Zhang

Thomas A Grana

Jinqian Gong

Tony James Hall

Vikram Sundararajan

Weiwen Wang

Yinghuan Lei

Javier Franco

Kerang Wang

Aleksey Yezerets

Neal W Currier

Baohua Qi

Carlos Alcides Lana

Michael J Ruth

Stephen M Holl

David L Buchanan

Douglas Mitchell

Gregory R White

Daniel R Harshbarger

James A Cramer

Gregory A Weber

Joseph M Brault

Xi Wei

David Samuel Everard

Lisa Farrell

Nick V Halstead

Todd A Corbet

David T Falkowski

David A Bolis

Balbahadur Singh

Andrew C Walseth

David A Olson

Brian P Liimatta

Luke R Staples

Jeff Runde

Ryan A Becker

James Hugh Ross

Jeffrey P Seger

Pradeep Prasad

Charles Wu

Venkata R Lakkireddy

Keith L Musser

Vijay Ramchandra Kadam

Kwadwo O Owusu

April Evans

Robert Kern

Purna Chander Nalla

Nishant Singh

Ernest A Streicher

Edwin M Thurnau

Prakash Bedapudi

Randal D Watts

Douglas A Mitchell

Douglas Alan Mitchell

A system, method, and apparatus for sensor tampering detection are provided. An aftertreatment system comprises a first leg comprising a first Selective Catalytic Reduction (SCR) system, a first doser, and a first NOx sensor, a second leg comprising a second SCR system, a second doser, and a second NOx sensor, and a controller. The controller determines satisfaction of enabling conditions. The controller doses reductant to the first and second SCR systems. The controller determines NOx values of the first SCR system and the second SCR system. The controller adjust the dosing of the first SCR system for a time period. The controller measures NOx values of the first SCR system and the second SCR system. The controller determines a difference between the third and first NOx values and a difference between the fourth and second NOx values. The controller generates an indication regarding whether the first NOx sensor is displaced.

Systems and methods for sensor tampering detection

A controller for controlling regeneration in an aftertreatment system comprising a first leg and a second leg is configured to: determine whether regeneration is permitted by the engine based on engine operating parameters; in response to regeneration being permitted, determine whether regeneration is required in at least one of the first leg or the second leg based on operating parameters of the first leg and the second leg, and whether regeneration is inhibited in either the first leg or the second leg; and in response to determining that (i) regeneration is required in at least one of the first or second leg, and (ii) regeneration is not inhibited in either the first or the second leg, cause insertion of hydrocarbons into the engine to thereby increase the temperature of the exhaust gas to a target temperature and cause regeneration in each of the first and second leg.

Systems and methods for controlling regeneration of aftertreatment systems including multiple legs

A system can include an engine, an aftertreatment system with a particulate filter, and a controller. The controller is configured to compare a time value since a last delta pressure soot load estimate process to a predetermined time threshold. Responsive to the time value being greater than or equal to the predetermined time threshold, the controller decreases a flow threshold value to a lower flow threshold value. If the flow amount is greater than or equal to the lower flow threshold value, then the controller activates a delta pressure soot load estimation process. A combined soot load estimate is then calculated using a delta pressure soot load estimation of the delta pressure soot load estimate process responsive to the lower flow threshold value.

Soot load estimation during idle or low load

A genset comprises an engine; an alternator, an exhaust system, a controller, and at least one of an intake system, an EVAP system, a fuel injector, an EGR system, a SAI system and an aftertreatment system. The controller is configured to control at least a portion of the genset. The controller is in electrical communication with one or more of the alternator, the EVAP system, the EGR system, the SAI system and the aftertreatment system via communication circuitry. Furthermore, the controller is configured to: (a) receive an electrical output from the alternator via the communication circuitry, (b) determine a load on the alternator from the electrical output, which corresponds to mechanical load on the engine, and (c) generate an electrical signal configured to at least partially control operation of at least one of the EVAP system, the EGR system, the SAI system and the aftertreatment system via the communication circuitry.

Genset engine using electrical sensing to control components for optimized performance

A method includes raising a temperature of an SCR catalyst for a predetermined time period while dosing urea. The method further includes maintaining the temperature of the SCR catalyst without dosing urea for a second predetermined time period. The method further includes filtering out at least low frequency data from a first NOsensor upstream of the SCR catalyst and from a second NOsensor downstream of the SCR catalyst, and comparing the filtered data from the first NOsensor and the second NOsensor without dosing urea over a third predetermined time period. The method further includes providing a NOsensor condition index for at least one of the first NOsensor and the second NOsensor in response to the comparing.

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According to one embodiment, an apparatus for controlling regeneration events on multiple diesel particulate filters (DPFs) of an exhaust after-treatment system includes a regeneration event synchronization module and regeneration event termination module. The regeneration event synchronization module is configured to simultaneously initiate a regeneration event on a first DPF and a regeneration event on a second DPF in response to a regeneration event request being triggered for one of the first and second DPFs. The regeneration event termination module is configured to terminate the regeneration event on the first DPF and the regeneration event on the second DPF. Under normal operating conditions, the termination of the regeneration event on the first DPF is performed independently of the termination of the regeneration event on the second DPF.

Apparatus, system, and method for controlling multiple diesel particulate filters

According to one embodiment, described herein is an apparatus for mitigating on-board diagnostic (OBD) faults generated by an OBD system of an internal combustion engine (ICE) system having a selective catalytic reduction system with a diesel exhaust fluid (DEF) decomposition tube. The apparatus includes a fault mitigation module that is configured to monitor at least one OBD signal of the OBD system and issue a request for regenerating the DEF decomposition tube when a value of the at least one OBD signal reaches a predetermined regeneration threshold corresponding with the at least one OBD signal. The regeneration threshold is reachable prior to an OBD fault threshold corresponding with the at least one OBD signal. The apparatus also includes a regeneration module that is configured to regenerate the DEF decomposition tube according to the issued request.

Apparatus, system, and method for mitigating diesel exhaust fluid deposits and associated conditions

In a system, an engine includes an exhaust system with a particle filter operable to collect particulate matter in exhaust produced by the engine, a sensor arrangement, a controller, and one or more engine control devices. The sensor arrangement provides a first sensor signal representative of oxygen in the exhaust and a second sensor signal representative of a temperature of the particle filter. The controller regulates operation of the particle filter in response to the sensor arrangement. The controller is structured to generate one or more output signals corresponding to a minimum exhaust flow rate as a function of the first and second sensor signals. The control devices are responsive to the one or more output signals to provide the minimum exhaust flow rate to the filter.

Control of filter regeneration

An apparatus for determining a deterioration of a NOsensor response rate in an internal combustion engine system includes an engine control module configured to stop fueling to an internal combustion engine during motoring of the internal combustion engine. The apparatus also includes a signal monitoring module configured to monitor a NOsensor signal after the engine control module stops fueling to the internal combustion engine during motoring of the engine and store NOsensor signal data corresponding to the monitored NOsensor signal. Additionally, the apparatus includes a time constant module that is configured to determine a time constant of the NOsensor response after the engine control module stops fueling. The apparatus further includes a response rate deterioration module configured to determine a response rate deterioration value of the NOsensor based at least partially on the determined time constant.

Apparatus, system, and method for estimating deterioration of a NOx sensor response rate

A method for improving the effectiveness of filters by increasing accuracy of an estimate of particulate matter loading remaining in the filter after cleaning. In one embodiment, the disclosed method includes removing soot from the DPF by cleaning, and measuring parameters for a set of predetermined criteria. The amount of soot present in the DPF is then estimated based on delta pressure. The resulting estimated soot load value accounts for the noise factors such as ash loading after extended operation. The value is then used to adjust for future measurements of soot loading in the DPF after subsequent regeneration treatments and/or used to diagnose the effectiveness of the cleaning. The method can also be applied to diagnostics of the DPF. When discrepancies between DPSLE and model-based soot load estimate are observed in healthy regenerations, failure modes such as plugged filter, extreme ash loading or substrate melting can be detected.

Methods of increasing accuracy of soot load estimates

A real time, average pressure difference method for monitoring doser efficiency is described that determines the difference between the average pressure when the doser is not injecting and the average pressure when the doser is injecting at a predetermined commanded injection rate. The average pressure difference method results in improved doser efficiency monitoring. The method can be implemented in a number of areas. For example, in a diesel truck application, the doser efficiency can be monitored accurately in real time.

Real time doser efficiency monitoring

A real time doser efficiency monitoring method is described that measures the average instant pressure difference within one duty cycle of the doser injector. The disclosed method results in improved doser efficiency monitoring. The disclosed method can be implemented in a number of areas. For example, in a diesel truck application, the doser efficiency can be monitored accurately, for example within 5% error, all the time, no matter whether the truck is in a transient or steady state.

Real-time doser efficiency monitoring

A method includes providing a system having a fluid flow, a fuel injector and an oxygen sensor disposed in the fluid flow, where the oxygen sensor is downstream of the fuel injector. The method includes determining a first air fuel ratio, changing an injection rate of the fuel injector and determining a second air fuel ratio, and determining a fault value for the fuel injector from the first air fuel ratio and the second air fuel ratio. The method further includes determining the fault value for the fuel injector by determining a difference between the first air fuel ratio and the second air fuel ratio, and by determining that the fault value is positive in response to the difference being lower than a passing threshold value. The method includes changing injection rates of the fuel injector for specified periods of time short enough to significant disruption of system temperatures.

System, method and apparatus for fuel injector diagnostics

Methods of monitoring replacement of a diesel particulate filter (DPF) by a non-particulate matter filter. The disclosed methods takes into account a change in delta pressure based soot load estimates (DPSLE) over time to detect whether the DPF has been replaced. The estimate, which is measured by the delta pressure drop across the filter, can be used to determine whether a device that does not have the capability of trapping soot, such as a muffler, has been inserted.

Methods of detecting replacement of a particulate matter filter

Growing community of inventors

Nashville, IN, United States of America

Daniel D Wilhelm