NOx Storage Catalyst (Lean NOx Trap)
A NOx storage catalyst stores nitrogen oxides and periodically converts them.
What is NOx Storage Catalyst (Lean NOx Trap)?
It is used in some diesels and lean-burn petrol engines. It needs short rich phases to regenerate. Sulphur can poison it. Desulphation runs occasionally at high temperature to remove sulphur that collects on the coating. NOx storage catalysts are often combined with SCR systems in modern diesels. A NOx sensor after the catalyst tells the control unit when the storage is full and a regeneration is needed.
How it works
NOx is stored on the coating and reduced during rich phases.
Why it matters for your car
Frequent short trips can hinder regeneration. Low-sulphur fuel is required.
Other terms
- Bird Droppings On Paint
- Brake Bleeding
- Coilover Suspension
- Crankshaft Position Sensor
- Dielectric Grease
- DPF Ash Loading
- Engine Coolant (Antifreeze)
- Engine Surging (Hunting Idle)
- Gasoline Particulate Filter (GPF/OPF)
- Lithium Grease
- Manual Transmission (Manual Gearbox)
- Manufacturer Oil Approval
- Periodic Technical Inspection (MOT, TÜV)
- Pushrod Engine (OHV)
- SAE Levels Of Driving Automation
- Thrust Angle
- Tyre Hotel (Tyre Storage Service)
- Valve Body (Automatic Transmission)
- Window Regulator
- WLTP (Worldwide Harmonised Light Vehicles Test Procedure)