Cummins Inc.

Cummins Ip, Inc.

Cummins Intellectual Property, Inc.

Cummins Emission Solutions Inc.

Phanindra V Garimella

Ming-feng Hsieh

Edmund P Hodzen

John N Chi

Paul V Moonjelly

Joan M Wills

Axel Otto Zur Loye

Timothy P Lutz

Gokul Vishwanathan

C Larry Bruner

Gayatri Adi

J Steven Kolhouse

Richard A Booth

Mark A Rosswurm

Abdul R Ofoli

Robert Charles Borregard

Weiwen Wang

Geomy George

Andrew W Osburn

Joe V Hill

Lester L Peters

Aleksey Yezerets

Neal W Currier

Michael Haas

Timothy R Frazier

Travis Alva Anderson

Jeffrey C Huang

Lisa Farrell

Jing Wang

Andy Osburn

Vivek Anand Sujan

Michael J Cunningham

John Franklin Wright

Robert J Thomas

Anant Puri

Ian W McGiffen

Boopathi Singalandapuram Mahadevan

Patrick J Shook

Aniket Gupta

Ross C Berryhill

Chandan Mahato

Indranil Brahma

Dean H Dringenburg

John L Hoehne

Pagalavan Mathari Bakthavatsalam

Ashwin Vyas

Shankar Kumar

Christopher Pollitt

Randy W Nelson

Ousmane Gueye

Jinghua Zhong

Pallav Pathak

Venkata R Lakkireddy

Howard Bishop

Jacob A Brown

Randall J Johnson

Pranati Yadav

Daniel R Hashbarger

Abdoul Karim Abdoul Azizou

Anita Singhal

James Ryan Hyslop

Venkatramanan Jayaraman

Michael Justin Tammen

Systems, methods and apparatus for controlling operation of dual fuel engines are disclosed that regulate the fuelling amounts provided by a first fuel and a second fuel during operation of the engine. The first fuel can be a liquid fuel and the second fuel can be a gaseous fuel. The fuelling amounts are controlled to improve operational outcomes of the duel fuel engine.

Systems, methods, and apparatus for operation of dual fuel engines

An engine friction monitor uses commanded torque and measured torque to provide a prognostic feature to identify failure modes of an engine that causes the engine from delivering the commanded torque.

Engine friction monitor

Systems, methods and apparatus for controlling operation of dual fuel engines are disclosed that regulate the fueling amounts provided by a first fuel and a second fuel during operation of the engine. The first fuel can be a liquid fuel and the second fuel can be a gaseous fuel. The fueling amounts are controlled to improve operational outcomes of the duel fuel engine.

A system for control of an internal combustion system having subsystems, each with different response times. Subsystems may include a fuel system, an air handling system, and an aftertreatment system, each being operated in response to a set of reference values generated by a respective target determiner. Calibration of each subsystem may be performed independently. The fuel system is controlled at a first time constant. The air handling system is controlled on the order of a second time constant slower than the first time constant. The aftertreatment system is controlled on the order of a third time constant slower than the second time constant. A subsystem manager is optionally in operative communication with each target determiner to coordinate control. Generally, dynamic parameters from slower subsystems are treated as static parameters when determining reference values for controlling a faster subsystem.

Hierarchical engine control systems and methods

Methods and apparatuses for calibration and control of various engine subsystems using a target value approach. Under the target value approach, the control of each engine subsystem is separated or decoupled to include a set of target values, or a reference value set. A subsystem has a corresponding target determiner, which provides a target value set, or reference value set, in response to a basis variable set and optionally an overall subsystem target. The basis variable set includes parameters selected to robustly characterize the variables that affect the operation of the particular subsystem. The target determiner is optionally calibrated to provide a reference value set within specifications of the subsystem. A physical subsystem controller operates in response to the reference value set.

Reference value engine control systems and methods

An apparatus includes an engine module, an in-cylinder content module, and an engine out NOx module. The engine module is structured to interpret engine in-cylinder data regarding an operating condition within a cylinder of an engine, wherein the engine in-cylinder data includes an engine torque, an engine speed, a rail pressure, and a start-of-injection. The in-cylinder content module is structured to interpret at least one additional in-cylinder data point regarding the operating condition within the cylinder of the engine. The engine out NOx module is structured to determine an engine out NOx amount responsive to the engine in-cylinder data and the at least one additional in-cylinder data point.

System and method for determining engine out NOx based on in-cylinder contents

Methods and apparatus relate to air handling for an internal combustion engine system, particularly utilizing premixed air and fuel. The engine system includes an intake air throttle (IAT) having a position set in response to the engine speed and a variable valve timing module having an intake valve timing set in response to the engine load. The variable valve timing module may be a cam phaser having a position at or between full retard and full advance positions. The engine system may operate in a transient mode or a fuel efficiency mode. The IAT position is adjusted in response to an engine speed error value or set at full throttle. The cam phaser position is adjusted in response to a pressure difference across the IAT, the engine speed, or is set to a limit position.

Cooperative cam phaser and air throttle control

A method of controlling a fuel injector comprises measuring a pressure in a cylinder of an engine with a pressure sensor and determining at least one of a crank angle and a crank speed with a crank sensor. The method also comprises calculating a net indicated mean effective pressure of the cylinder from the measured value of the pressure sensor and the determined value of the crank sensor. Also, the method comprises adjusting a fueling parameter of a fuel injector for the cylinder in response to the difference between the calculated net indicated mean effective pressure and a reference mean effective pressure indicates a change in power of the engine. Alternatively, the method may adjust the fueling parameter based on a power feedback signal for the engine.

Selective fuel on time and combustion centroid modulation to compensate for injection nozzle cavitation and maintain engine power output and emissions for large bore high-speed diesel engine

Apparatuses, methods and systems for controlling operation of dual fuel engines are disclosed. One embodiment is a method for controlling operation of a dual fuel engine based upon a combustion index value. The combustion index may be empirically determined to provide desired engine operation at a plurality of ratios of gaseous fuel and liquid fuel. The desired engine operation may include a number of criteria including, for examiner an engine knock criterion and/or an exhaust emissions criterion. The combustion index value may be determined during operation of the engine based upon measured, estimated or predicted engine operating parameters. The combustion index value may be utilized to interpolate between a first engine operating map for a first ratio of gaseous fuel and liquid fuel and a second engine operating map for a second ratio of gaseous fuel and liquid fuel.

Dual-fuel engine combustion mode transition controls

A system for and method of diagnosing operation of a partial filtration filter exhaust aftertreatment system are provided. An upstream exhaust temperature value is determined in an exhaust system upstream of at least one of a diesel oxidation catalyst (DOC) component and a first partial flow filter (PFF) component. A downstream exhaust temperature value is determined in the exhaust system downstream of a second PFF component positioned downstream of the at least one of the DOC component and the first PFF component. A frequency difference is determined between a first frequency content of the upstream exhaust temperature value and a second frequency content of the downstream exhaust temperature value. If the frequency is less than a predetermined threshold, it is determined that at least one of the DOC component and the PFF component are not present in the exhaust system.

On-board diagnostic methods for partial filtration filters

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Bloomington, IN, United States of America

Phanindra V Garimella