Why diesel engines produce black smoke
Visible diesel smoke is normally a sign that part of the fuel has not oxidised cleanly during combustion. The result is soot, unburned hydrocarbons and carbon-rich exhaust particles that appear as black smoke or high opacity.
This is especially common in older diesel engines, low-speed operation, high-idle cycles, poor fuel quality, heavy acceleration and engines operating below optimal temperature.
O3 Protegelo works before the exhaust system. It improves the combustion behaviour of the fuel before the smoke and soot are formed.
How O3 Protegelo helps
As the fuel passes through the O3 catalytic core, active iron-oxide nanoparticles are generated in the fuel. During combustion, these particles support faster and more complete oxidation of the fuel.
- Less incomplete combustion
- Reduced soot formation
- Lower visible smoke and opacity in suitable applications
- Cleaner exhaust conditions for aftertreatment systems
Typical applications
This page is especially relevant for trucks, buses, port equipment, construction machinery, diesel generators, older marine engines and any diesel application where visible smoke is a concern.
What to measure
The most useful before/after checks are opacity, smoke coefficient, HC, CO, NOx, O₂ and CO₂, measured under comparable engine conditions before and after installation.
FAQ
Does O3 Protegelo mask smoke?
No. It does not hide smoke with an additive or exhaust treatment. It is designed to reduce the combustion by-products that create smoke at source.
Will every engine show the same smoke reduction?
No. Results depend on the engine condition, baseline smoke level, fuel quality, duty cycle and installation configuration.