Category: Multi-Slide Guides

The Digest’s 2025 Multi-Slide Guide to A low GHG advanced SI engine that can operate on NG and NG/H2 blends with diesel-equivalent performance for off-road applications

October 19, 2025 | Jim Lane

This project develops an advanced Spark Ignition engine operating on Natural Gas (NG) and NG/Hydrogen blends, targeting 45% BTE (diesel-equivalent). Technical advances include coupled 1D/CFD simulations and a novel in-situ CO2/H2O exhaust gas sensor for fast EGR feedback and H2 ratio estimation. The goal is Stoichiometric operation with near-zero CH4 slip. This results in up […]

The Digest’s 2025 Multi-Slide Guide to Plasma-Assisted Pre-Chamber Ignition System for Highly Dilute Stoichiometric Heavy-Duty Natural Gas Engines

October 16, 2025 | Jim Lane

This research develops a next-generation plasma-assisted pre-chamber ignition system for highly dilute stoichiometric heavy-duty natural gas engines. Key technology includes nano-second pulsed plasma igniters and CFD modeling to optimize prechamber geometry and increase dilution tolerance. The innovation aims to achieve ≥48% Brake Thermal Efficiency, improving efficiency by ≥7% compared to baseline natural gas engines. This […]

The Digest’s 2025 Multi-Slide Guide to Medium Duty Off-Road DME Engine Achieving High Efficiency and Ultra Low Emissions

October 15, 2025 | Jim Lane

This project develops durable fuel injection systems (FIS) and Ducted Fuel Injection (DFI) for rDME Mixing Controlled Compression Ignition (MCCI) combustion in off-road engines. A core technology advance is utilizing dual FIS development pathways to mitigate risk for a planned 200-hour durability demonstration. The technology leverages rDME’s low carbon intensity (as low as -279 gCO2e/MJ), […]

The Digest’s 2025 Multi-Slide Guide to High-Efficiency Mixing Controlled Compression Ignition Combustion of Propane Dimethyl Ether (DME) Blends

October 14, 2025 | Jim Lane

This project develops Mixing Controlled Compression Ignition (MCCI) for propane/DME blends. Technology advances include a high-pressure fuel system capable of over 1100 bar injection and CFD optimization utilizing exhaust rebreathing to stabilize combustion. The impact is achieving diesel-equivalent efficiency (≥37.1%) and enabling a potential 15% reduction in CO2 emissions compared to conventional propane engines, leveraging […]

The Digest’s 2025 Multi-Slide Guide to Ammonia for 4-stroke Marine Dual Fuel and Gas Engines (Retrofits and New)

October 13, 2025 | Jim Lane

This R&D integrates engine experiments and catalytic decomposition to maximize ammonia utilization in 4-stroke marine engines. Technical advances include fully commissioned safety systems and demonstrating over 95% diesel replacement using dual-fuel strategies. The impact is accelerating maritime decarbonization, achieving an 85% reduction in CO2-equivalent emissions by addressing challenging fuel properties and N2O formation.

The Digest’s 2025 Multi-Slide Guide to Biodiesel Poisoning of Close-Coupled SCR

October 12, 2025 | Jim Lane

This research addresses how CC-SCR systems are vulnerable to metal poisoning (Na, K, Ca, Mg) from high-level biodiesel blends. The core technology is utilizing Spaci-MS (Spatial activity/storage mapping) alongside systematic B100-fueled engine aging to link distributed catalyst degradation to specific metal gradients. Key progress includes acquiring the 125 kW genset, establishing fuel infrastructure plans, and […]

The Digest’s 2025 Multi-Slide Guide to Low-Load Cycle Emission Control

October 9, 2025 | Jim Lane

Focused on enhancing low-temperature SCR activity for hard-to-electrify applications, this project leverages Operando EPR and DFT calculations to study Cu-zeolite kinetics. A key finding is that strong Brönsted acid sites (BAS) enhance low-temperature activity by promoting the hydrolysis and transfer of Cu(II) complexes. The team validated that NH3 overdosing inhibits NOx conversion by hindering the […]

The Digest’s 2025 Multi-Slide Guide to Challenges with Renewable Fuels

October 8, 2025 | Jim Lane

This project uses atomic-level insights (HAADF-STEM) to understand catalyst durability against biodiesel poisoning and H2-ICE exhaust. Technologically, highly stable Pd-core Pt/Pd-shell structures were identified in commercial catalysts for oxidation. Key findings show high H2O content increases low-temperature SCR N2O formation, while H2 slip reduces redox-active Cu(II) sites above $200C. H2-SCR concepts are advancing to significantly […]

The Digest’s 2025 Multi-Slide Guide to Low Greenhouse Gas NOx Control

October 7, 2025 | Jim Lane

This research fundamentally clarifies N2O formation mechanisms during low-temperature SCR using Cu-zeolite catalysts and advanced characterization (DRIFTS/EPR). Key findings indicate that N2O formation is driven by the gaseous NO2 pool and that Brönsted acid sites (BAS) catalyze NH4NO3 decomposition. This work supports advanced technological solutions, demonstrating that a multi-component catalyst bed arrangement (Fe-CHA and composite […]

The Digest’s 2025 Multi-Slide Guide to Optimized Low Carbon Fuel Range Extenders (HiREX)

October 6, 2025 | Jim Lane

This project focuses on demonstrating a nonroad series hybrid powertrain to achieve more than 50% LCA GHG reduction. Technological foundations include optimized hybrid engines, high-temperature Motor/Generators/Inverters, and predictive control. Key findings include developing the series hybrid model and defining the Range Extender Electric Vehicle (REEV) architecture. A roadmap is progressing to evaluate future low-carbon powertrains, […]

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