Issue link: https://read.dmtmag.com/i/393901
Decreased Levels of EGR Diesel Particulate Filter DEF Decomposes Into Ammonia and Mixes with Exhaust Gases, Including NO x DEF Injected Into Exhaust Steam DEF Tank Catalyst Converts Ammonia/NO x Mix to Nitrogen and Water Nitrogen and Water W H AT I S DIE SE L E X H AU S T F LUID (DE F)? • North American emissions standards have greatly limited allowable NO x (oxides of nitrogen) emissions from diesel engines of on‑road vehicles • DEF (Diesel Exhaust Fluid) is the solution required for SCR (Selective Catalytic Reduction) technology to meet these emission standards • DEF is defined as AUS 32 (Aqueous Urea Solution 32%) made from 32.5% high purity urea and 67.5% de‑ionized water • Solution must meet ISO 22241 standards and be API approved DE F R EQUIR E D TO SUPP ORT S CR E NGINE T ECHNOLOGY • Diesel engine manufacturers have chosen SCR (Selective Catalytic Reduction) technology to achieve reduced North American NO x levels standards • SCR requires urea based DEF and a catalytic converter to significantly reduce the oxides of nitrogen (NO x ) emissions • Metered amounts of DEF are injected into the exhaust from the engine, where it vaporizes and decomposes to form ammonia and carbon dioxide. Ammonia (NH c ) together with the SCR catalyst converts the NO x to nitrogen (N 2 ) and water (H 2 O), both harmless which are emitted through the exhaust B A C K N E X T H 2 L A B C H E C K E N G i N E T R A N S M i S S i O N A X L E F i F T H W H E E L & G R E A S E S H 2 B L U S U P E R C L E A N H O M E H Y D R A U L i C F L U i D S A B O U T D i E S E L E X H A U S T F L U i D