Cummins Inc.

Westport Power Inc.

Westport Research Inc.

Cummins Emission Solutions Inc.

Cummins Intellectual Property, Inc.

Hydrogenics Corporation

Cummins Ip, Inc.

Cummins Westport Inc.

Westport Fuel Systems Canada Inc.

Richard J Ancimer

Axel Otto Zur Loye

Colin L Norris

Michael Haas

John Franklin Wright

Konstantin Tanin

Thomas M Yonushonis

Aleksey Yezerets

John G Buechler

John K Heichelbech

Gary Charles Salemme

Randy W Nelson

Ousmane Gueye

Nassim Khaled

Michael J Cunningham

Mert Geveci

Krishna Kamasamudram

Sandeep Munshi

Paolo Forte

Greg A Batenburg

Yinghuan Lei

Sumit Tripathi

Arvind Suresh

Duran Cheung

Yuhui Zha

Vivek Anand Sujan

Neal W Currier

David Paul Genter

Timothy P Lutz

David Kalu Mumford

Agneya Turlapati

Ashok Kumar

Jinyong Luo

Jian Huang

Tamas Szailer

Tim Frazier

Sonia Sorbera

Fan Zeng

Ashwin Vyas

Alok A Joshi

Patric Ouellette

Olivier P M Lebastard

Richard Wing

Di Wang

David A Ruthmansdorfer

Jeffrey John Thompson

Joseph P Chandraraj

Abhishek Mehrotra

Guoqiang Li

Yadan Tang

Prabhsimran Malhi

Brian K Landes

Justin Rizzi

Jeff Thompson

Olivier Lebastard

Stewart Whitfield

Mike Baker

Damien Clapa

Mert Zorlu

Salvatore Ranieri

Eero Teene

Hui Xu

Leta Woo

Tyler Rash

Mark Dunn

D Andrew Lew

David Mumford

Jonathan Harris

The present disclosure generally relates to systems and methods for using an energy storage device to assist a venturi or an ejector in a fuel cell or fuel stack system.

Systems and methods of using an energy storage device to assist an ejector

The present disclosure generally relates to systems and methods for determining, managing, and/or controlling excess hydrogen flow in a system comprising a fuel cell or fuel cell stack and ejector based on the internal state of the ejector.

Systems and methods to measure or control fuel cell stack excess hydrogen flow using ejector mixing state

A filtration system for a fuel cell hybrid propulsion system includes a first stage filter, a second stage filter positioned downstream of the first stage filter, and a third stage filter positioned downstream of the second stage filter and configured to be positioned upstream of a fuel cell system. The first stage filter has first pores with a first mean pore size. The second stage filter has second pores with a second mean pore size. The third stage filter has third pores with a third mean pore size. The second mean pore size is less than the first mean pore size. The third mean pore size is less than or equal to the second mean pore size. The first, second, and third stage filter are structured to filter an airflow prior to being received by the fuel cell system.

Multi-stage filtration system for fuel cell hybrid propulsion system

The present disclosure generally relates to systems and methods for fuel cell regeneration after degradation.

Fuel cell regeneration

The present disclosure generally relates to systems and methods for operating a shutdown process in a fuel cell system including connecting a passive electrical load to a fuel cell stack in the fuel cell system before initiating the shutdown process, disconnecting a DC-DC converter by a system controller, initiating nitrogen blanketing after a current passing through the DC-DC converter is reduced to about zero, ensuring water content in the fuel cell stack is about zero, and sending a signal to the system controller to initiate the shutdown process.

Electrode pressure balance for a nitrogen blanketing process

The present disclosure generally relates to systems and methods for managing and/or excess hydrogen flow in a system comprising a fuel cell or fuel cell stack based on humidity measurements.

Systems and methods to measure or control fuel cell stack excess hydrogen flow using humidity

A fuel ejector assembly includes a nozzle structured to receive fuel from a fuel conduit and eject the fuel therethrough, and an exhaust gas recirculation ('EGR') conduit structured to communicate a recirculated exhaust gas therethrough. A mixing portion is disposed downstream of the nozzle and the EGR conduit, the nozzle and the EGR conduit fluidly coupled to the mixing portion such that the mixing portion receives each of the fuel and the recirculated exhaust gas. A diffuser is disposed downstream of the mixing portion and is configured to be fluidly coupled to an engine to communicate a mixture of the fuel and the recirculated exhaust gas to the engine.

Fuel ejector assembly for fuel assisted EGR flow

Systems, apparatuses, and methods include predicting a sulfur exposure of one or more copper-zeolite catalysts deployed in an exhaust aftertreatment system; comparing the predicted sulfur exposure to a predefined sulfur exposure threshold; and responsive to the determination, heating the exhaust aftertreatment catalyst to a predefined heat treatment temperature for a predefined time period to desulfate the one or more copper-zeolite catalysts.

Systems and methods for selective catalytic reduction and/or ammonia slip catalyst sulfur protection

An aftertreatment system comprises a first passageway having a first temperature and a second passageway having a second temperature different than the first temperature. A turbine is disposed downstream from the first passageway and upstream from the second passageway. The turbine is in fluidic communication with the first passageway and the second passageway. The turbine is structured to receive an exhaust gas from the first passageway, generate energy using the exhaust gas flowing through the turbine and communicate the exhaust gas to the second passageway. The aftertreatment system also includes an insertion device structured to insert an exhaust reductant into the first passageway. A selective catalytic reduction system is configured to receive the exhaust gas from the second passageway and treat the exhaust gas. The first temperature can be higher than the second temperature.

Reductant injection in exhaust manifold

A method for diagnosing feedgas generation capacity of an oxidation catalyst in an exhaust aftertreatment system includes: determining a first temperature value at a first location in the exhaust aftertreatment system upstream of an oxidation catalyst, the oxidation catalyst being upstream of a selective catalytic reduction catalyst; determining a space velocity of the exhaust in the oxidation catalyst; determining an estimated exotherm value of the oxidation catalyst based on the first temperature value and the space velocity; instructing a doser of the aftertreatment system to dose hydrocarbon into the oxidation catalyst; determining an in-use exotherm value of the oxidation catalyst upon insertion of the hydrocarbon into the oxidation catalyst; and determining a fault condition based upon a comparison between the estimated exotherm value and the in-use exotherm value.

Systems and methods for SCR feedgas diagnostics

An exhaust aftertreatment system includes a diesel oxidation catalyst in exhaust gas receiving communication with an engine. A selective catalytic reduction catalyst on filter (SCR on filter) is positioned downstream of the diesel oxidation catalyst. A hydrocarbon doser is configured to inject hydrocarbons into a flow of the exhaust gas upstream of the diesel oxidation catalyst. A reductant doser is configured to inject reductant into the flow of the exhaust gas upstream of the SCR on filter and downstream of the diesel oxidation catalyst. An aftertreatment controller is operatively coupled to the hydrocarbon doser. The aftertreatment controller is configured to control a dosing rate at which the hydrocarbon doser injects hydrocarbons into the flow of the exhaust gas so as to cause regeneration of the SCR on filter.

Sensor configuration for aftertreatment system including SCR on filter

Systems and methods are provided for feedgas diagnostics in a selective catalytic reduction (SCR) system. An example electronic system may be part of on-board diagnostic (OBD) functionality in a diesel fuel vehicle and may comprise circuits for defining and managing system conditions for hydrocarbon dosing, adjusting the dosing to a diesel oxidation catalyst (DOC) while the system is in operation, and defining a diagnostic framework based at least on exothermic properties of various components of a DOC such that a DOC may be monitored for failure and/or end of useful life (EUL). The electronic system may include a tuning circuit for calibrating the diagnostic framework.

Reductant injection exhaust manifold

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Toronto, Canada

Richard J Ancimer