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Timothy J. Jacobs
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Proceedings Papers

Cycle-by-Cycle Modeling of Integral Compressor Engines for Real-Time Emissions Control

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Kevin Wallace, Timothy J. Jacobs
Proc. ASME. ICEF2023, ASME 2023 ICE Forward Conference, V001T01A009, October 8–11, 2023
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2023-110401
https://doi.org/10.1115/ICEF2023-110401
View Paper titled, Cycle-by-Cycle Modeling of Integral Compressor Engines for Real-Time Emissions Control
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Topics: Air pollution control, Compressors, Cycles, Emissions, Engines, Modeling
Proceedings Papers

Study of NO x Formation at Lean Conditions in a Prechamber-Ignited Two-Stroke Natural Gas Engine

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Jacob Nowlin, Mark Patterson, Timothy J. Jacobs
Proc. ASME. ICEF2023, ASME 2023 ICE Forward Conference, V001T01A006, October 8–11, 2023
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2023-109975
https://doi.org/10.1115/ICEF2023-109975
View Paper titled, Study of NO x Formation at Lean Conditions in a Prechamber-Ignited Two-Stroke Natural Gas Engine
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Topics: Emissions, Engines, Gas engines, Nitrogen oxides, Temperature, Cycles, Computational fluid dynamics, Cylinders, Simulation, Combustion chambers
Journal Articles

Combustion Variability Monitoring in Engines Using High-Speed Exhaust Temperature and Pressure Measurements

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Abdullah U. Bajwa, Mark A. Patterson, Timothy J. Jacobs
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2023, 145(6): 061020.
Paper No: GTP-22-1546
https://doi.org/10.1115/1.4056636
Published Online: February 15, 2023
View Articletitled, Combustion Variability Monitoring in Engines Using High-Speed Exhaust Temperature and Pressure Measurements
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Topics: Combustion, Cycles, Engines, Exhaust systems, Pressure, Temperature, Cylinders
Proceedings Papers

Use of a Thermodynamic Cycle Simulation to Identify Fundamental Thermodynamic Factors of NO x Formation in a Natural Gas Engine

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Kevin L. Wallace, Jerald A. Caton, Timothy J. Jacobs
Proc. ASME. ICEF2020, ASME 2020 Internal Combustion Engine Division Fall Technical Conference, V001T01A003, November 4–6, 2020
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2020-2928
https://doi.org/10.1115/ICEF2020-2928
View Paper titled, Use of a Thermodynamic Cycle Simulation to Identify Fundamental Thermodynamic Factors of NO x Formation in a Natural Gas Engine
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Topics: Gas engines, Nitrogen oxides, Simulation, Thermodynamic cycles, Emissions, Compressors, Engines, Temperature, Air pollution control, Combustion
Journal Articles

Estimating Laminar Flame Speed and Ignition Delay for a Series of Natural Gas Mixtures at IC Engine-Relevant Conditions

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Kelsey Fieseler, Taylor Linker, Mark Patterson, Daniel Rem, Timothy J. Jacobs
Journal: Journal of Energy Resources Technology
Publisher: ASME
Article Type: Research Papers
J. Energy Resour. Technol. June 2020, 142(6): 062301.
Paper No: JERT-19-1541
https://doi.org/10.1115/1.4045536
Published Online: December 10, 2019
View Articletitled, Estimating Laminar Flame Speed and Ignition Delay for a Series of Natural Gas Mixtures at IC Engine-Relevant Conditions
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Topics: Engines, Flames, Fuels, Ignition delay, Methane, Natural gas, Pressure, Temperature, Combustion
Proceedings Papers

A Literature Review of NO x Formation Kinetics and a Prediction Method for Lean-Burn, Two-Stroke Natural Gas Engines

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Taylor F. Linker, Mark Patterson, Greg Beshouri, Abdullah U. Bajwa, Timothy J. Jacobs
Proc. ASME. ICEF2019, ASME 2019 Internal Combustion Engine Division Fall Technical Conference, V001T01A003, October 20–23, 2019
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2019-7193
https://doi.org/10.1115/ICEF2019-7193
View Paper titled, A Literature Review of NO x Formation Kinetics and a Prediction Method for Lean-Burn, Two-Stroke Natural Gas Engines
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Topics: Gas engines, Nitrogen oxides, Engines, Emissions, Compressors, Natural gas, Fuels, Pipelines, Chemical properties, Combustion
Proceedings Papers

A New Single-Zone Multi-Stage Scavenging Model for Real-Time Emissions Control in Two-Stroke Engines

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Abdullah U. Bajwa, Mark Patterson, Taylor Linker, Timothy J. Jacobs
Proc. ASME. ICEF2019, ASME 2019 Internal Combustion Engine Division Fall Technical Conference, V001T01A004, October 20–23, 2019
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2019-7198
https://doi.org/10.1115/ICEF2019-7198
View Paper titled, A New Single-Zone Multi-Stage Scavenging Model for Real-Time Emissions Control in Two-Stroke Engines
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Topics: Air pollution control, Two-stroke engines, Gases, Cylinders, Combustion, Boundary-value problems, Combustion chambers, Cycles, Displacement, Emissions
Journal Articles

Comparison of Diesel Engine Efficiency and Combustion Characteristics Between Different Bore Engines

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Jue Li, Timothy J. Jacobs, Tushar Bera, Michael A. Parkes
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. October 2018, 140(10): 102807.
Paper No: GTP-17-1225
https://doi.org/10.1115/1.4040092
Published Online: June 25, 2018
View Articletitled, Comparison of Diesel Engine Efficiency and Combustion Characteristics Between Different Bore Engines
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Topics: Combustion, Cylinders, Engines, Fuels, Stress, Heat transfer, Pressure
Journal Articles

Kinematics of an Articulated Connecting Rod and Its Effect on Simulated Compression Pressures and Port Timings

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Kelsey Fieseler, Timothy J. Jacobs, Mark Patterson
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2018, 140(9): 092803.
Paper No: GTP-18-1087
https://doi.org/10.1115/1.4039831
Published Online: May 24, 2018
View Articletitled, Kinematics of an Articulated Connecting Rod and Its Effect on Simulated Compression Pressures and Port Timings
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Topics: Compression, Compressors, Cylinders, Engines, Pistons, Simulation, Kinematics, Modeling
Proceedings Papers

Kinematics of an Articulated Connecting Rod and its Effect on Simulated Compression Pressures and Port Timings

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Kelsey Fieseler, Timothy J. Jacobs, Mark Patterson
Proc. ASME. ICEF2017, Volume 2: Emissions Control Systems; Instrumentation, Controls, and Hybrids; Numerical Simulation; Engine Design and Mechanical Development, V002T07A013, October 15–18, 2017
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2017-3670
https://doi.org/10.1115/ICEF2017-3670
View Paper titled, Kinematics of an Articulated Connecting Rod and its Effect on Simulated Compression Pressures and Port Timings
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Topics: Compression, Kinematics, Pistons, Engines, Cylinders, Compressors, Pressure, Exhaust systems, Geometry, Hinges
Proceedings Papers

Zero Dimensional Quasi-Predictive Thermodynamic Simulation for Establishing Initial Cylinder Conditions for CFD Simulation of Diesel Combustion

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Ryan A. Bandura, Timothy J. Jacobs
Proc. ASME. ICEF2015, Volume 2: Emissions Control Systems; Instrumentation, Controls, and Hybrids; Numerical Simulation; Engine Design and Mechanical Development, V002T06A020, November 8–11, 2015
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2015-1166
https://doi.org/10.1115/ICEF2015-1166
View Paper titled, Zero Dimensional Quasi-Predictive Thermodynamic Simulation for Establishing Initial Cylinder Conditions for CFD Simulation of Diesel Combustion
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Topics: Combustion, Computational fluid dynamics, Cylinders, Diesel, Simulation, Temperature, Heat, Pressure, Sprays, Fuels
Proceedings Papers

Combustion Characteristics of a 2-Stroke Large Bore Natural Gas Spark-Ignited Engine

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Aaron A. Griffin, Timothy J. Jacobs
Proc. ASME. ICEF2015, Volume 1: Large Bore Engines; Fuels; Advanced Combustion, V001T01A002, November 8–11, 2015
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2015-1010
https://doi.org/10.1115/ICEF2015-1010
View Paper titled, Combustion Characteristics of a 2-Stroke Large Bore Natural Gas Spark-Ignited Engine
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Topics: Combustion, Engines, Natural gas, Stress, Cycles, Emissions, Pressure, Compression, Cylinders, Pressure measurement
Proceedings Papers

Combustion Trajectory Visualization Model for Study of Conventional and Advanced Direct Injection Combustion Modes

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Joshua A. Bittle, Timothy J. Jacobs
Proc. ASME. ICEF2015, Volume 1: Large Bore Engines; Fuels; Advanced Combustion, V001T03A004, November 8–11, 2015
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2015-1031
https://doi.org/10.1115/ICEF2015-1031
View Paper titled, Combustion Trajectory Visualization Model for Study of Conventional and Advanced Direct Injection Combustion Modes
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Topics: Combustion, Trajectories (Physics), Visualization, Cylinders, Engines, Temperature, Pressure, Sprays, Diesel, Fuels
Journal Articles

Waste Heat Recovery Potential of Advanced Internal Combustion Engine Technologies

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Timothy J. Jacobs
Journal: Journal of Energy Resources Technology
Publisher: ASME
Article Type: Research-Article
J. Energy Resour. Technol. July 2015, 137(4): 042004.
Paper No: JERT-14-1379
https://doi.org/10.1115/1.4030108
Published Online: July 1, 2015
View Articletitled, Waste Heat Recovery Potential of Advanced Internal Combustion Engine Technologies
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Topics: Biodiesel, Combustion, Engines, Exergy, Exhaust gas recirculation, Exhaust systems, Flow (Dynamics), Fuels, Internal combustion engines, Temperature
Proceedings Papers

Validation and Results of a Pseudo-Multi-Zone Combustion Trajectory Prediction Model for Capturing Soot and NOx Formation on a Medium Duty Diesel Engine

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Joshua A. Bittle, Zhiming Gao, Timothy J. Jacobs
Proc. ASME. ICEF2013, Volume 1: Large Bore Engines; Advanced Combustion; Emissions Control Systems; Instrumentation, Controls, and Hybrids, V001T03A009, October 13–16, 2013
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2013-19069
https://doi.org/10.1115/ICEF2013-19069
View Paper titled, Validation and Results of a Pseudo-Multi-Zone Combustion Trajectory Prediction Model for Capturing Soot and NOx Formation on a Medium Duty Diesel Engine
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Topics: Combustion, Diesel engines, Nitrogen oxides, Soot, Trajectories (Physics), Engines, Emissions, Low temperature, Calibration, Temperature
Proceedings Papers

Cyclic Variability in Diesel/Gasoline Dual-Fuel Combustion on a Medium-Duty Diesel Engine

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Jiafeng Sun, Joshua A. Bittle, Timothy J. Jacobs
Proc. ASME. ICEF2013, Volume 1: Large Bore Engines; Advanced Combustion; Emissions Control Systems; Instrumentation, Controls, and Hybrids, V001T03A011, October 13–16, 2013
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2013-19095
https://doi.org/10.1115/ICEF2013-19095
View Paper titled, Cyclic Variability in Diesel/Gasoline Dual-Fuel Combustion on a Medium-Duty Diesel Engine
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Topics: Combustion, Diesel, Diesel engines, Fuels, Gasoline
Proceedings Papers

Improvement in Lean Homogenous Spark-Ignition Combustion With Pulsed Energy Spark Plug

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Timothy J. Jacobs, Louis J. Camilli, Joseph E. Gonnella
Proc. ASME. ICEF2012, ASME 2012 Internal Combustion Engine Division Fall Technical Conference, 439-445, September 23–26, 2012
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2012-92165
https://doi.org/10.1115/ICEF2012-92165
View Paper titled, Improvement in Lean Homogenous Spark-Ignition Combustion With Pulsed Energy Spark Plug
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Topics: Combustion, Ignition, Internal combustion engines, Fuels, Bombs, Capacitors, Energy transformation, Engines, Homogeneous charge compression ignition engines, Ignition delay
Proceedings Papers

An Analytical Model to Predict Nitric Oxide Concentration and Soot Emissivity in a Diesel Engine

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Hoseok Song, Brandon T. Tompkins, Timothy J. Jacobs
Proc. ASME. ICEF2011, ASME 2011 Internal Combustion Engine Division Fall Technical Conference, 883-891, October 2–5, 2011
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2011-60112
https://doi.org/10.1115/ICEF2011-60112
View Paper titled, An Analytical Model to Predict Nitric Oxide Concentration and Soot Emissivity in a Diesel Engine
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Topics: Diesel engines, Emissivity, Soot, Temperature, Combustion, Cylinders, Emissions, Engines, Gases, Modeling
Proceedings Papers

Particulate Matter Emissions From Late Injection High EGR Low Temperature Diesel Combustion

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Brandon T. Tompkins, Hoseok Song, Timothy J. Jacobs
Proc. ASME. ICEF2011, ASME 2011 Internal Combustion Engine Division Fall Technical Conference, 373-381, October 2–5, 2011
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2011-60067
https://doi.org/10.1115/ICEF2011-60067
View Paper titled, Particulate Matter Emissions From Late Injection High EGR Low Temperature Diesel Combustion
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Topics: Combustion, Diesel, Emissions, Exhaust gas recirculation, Low temperature, Particulate matter, Soot, Blocks (Building materials), Diesel engines, Engines
Proceedings Papers

Efficiency Considerations of Later-Phased Low Temperature Diesel Combustion

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Bryan M. Knight, Joshua A. Bittle, Timothy J. Jacobs
Proc. ASME. ICEF2010, ASME 2010 Internal Combustion Engine Division Fall Technical Conference, 359-368, September 12–15, 2010
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2010-35070
https://doi.org/10.1115/ICEF2010-35070
View Paper titled, Efficiency Considerations of Later-Phased Low Temperature Diesel Combustion
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Topics: Combustion, Diesel, Low temperature, Brakes, Fuels, Exhaust systems, Friction, Heat transfer, Carbon, Diesel engines