Lean-burn gasoline engines are approximately 10% more fuel efficient than conventional,
stoichiometric-burn ones. Although relatively modest, if implemented across the entire US …

This paper charts the development of three three-way catalyst (TWC) and four lean-NOx trap
(LNT) formulations in four vehicle systems over a four-year period. All LNTs were installed in …

The two most common NOx reducing technologies, in an oxygen abundant exhaust stream,
are urea selective catalytic reduction urea-SCR and lean NOx trap (LNT) catalysts. Each …

The push for environmental protection and sustain-ability has led to strict emission
regulations for automotive manufacturers as evident in EURO VII and 2026 EPA …

Three-way catalysts (TWCs) are extremely effective at converting emissions such as carbon
monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx) at the stoichiometric air/fuel …

This study extends research previously reported from our laboratory [SAE 2009-01-0285] on
diesel NOx control utilizing a new generation of Lean NOx Trap (LNT) plus insitu Selective …

The 2007 emission standards for both light-duty and heavy-duty diesel vehicles remain a
challenge. A level of about 90% NOx conversion is required to meet the standards …

For fuel economy improvement by lean-burn gasoline engines, extension of their lean
operation range to higher loads is desirable as more fuel is consumed during acceleration …

Spark-Ignited Direct-Injection (SIDI) engines, such as the Mitsubishi GDI family of engines,
are being used by automobile manufacturers to improve fuel economy and reduce CO2 …

Lean gasoline engines offer greater fuel economy than common stoichiometric gasoline
engines. However, excess oxygen prevents the use of the current three-way catalyst (TWC) …