Black smoke from diesel exhaust is soot produced by incomplete combustion of the fuel.

the verdict

SUPPORTED

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Recorded sources

8 sources for · 0 against

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Is it true that black smoke from diesel exhaust is soot produced by incomplete combustion of the fuel?

Yes. A reference article states directly that diesel engines produce black soot and that the black smoke consists of carbon compounds that have not burned because the fuel is not fully atomized. Several other sources equate black exhaust smoke with soot, though they do not themselves explain the incomplete-combustion origin.

Verdict: SUPPORTED · 8 sources for, 0 against · Last checked 3 Oct 2026

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 8

Diesel exhaust

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Diesel exhaust. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Diesel_exhaust

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More for · 7

Combustion of diesel fuel from a toxicological perspective. I. Origin of incomplete combustion products.

1992

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PT, S. & RP, B. (1992). Combustion of diesel fuel from a toxicological perspective. I. Origin of incomplete combustion products.. doi.org. https://doi.org/10.1007/bf00380904

CONCEPT AND MODELS FOR EVALUATION OF BLACK AND WHITE SMOKE COMPONENTS IN DIESEL ENGINE EXHAUST

2017

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CONCEPT AND MODELS FOR EVALUATION OF BLACK AND WHITE SMOKE COMPONENTS IN DIESEL ENGINE EXHAUST. (2017). doi.org. https://doi.org/10.20858/tp.2017.12.3.8

Reduction of Smoke and Soot Formation in a Diesel Engine by Replacing Completely Petroleum Fuel with Methanol and Methyl Ester of Rapeseed Oil

2026

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A., L. V. & P., L. O. (2026). Reduction of Smoke and Soot Formation in a Diesel Engine by Replacing Completely Petroleum Fuel with Methanol and Methyl Ester of Rapeseed Oil. zenodo.org. https://doi.org/10.15507/2658-4123.26362.392-415

Developmental toxicity of diesel exhaust: a review of studies in experimental animals.

2013

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Ema, M., Naya, M., Horimoto, M., & Kato, H. (2013). Developmental toxicity of diesel exhaust: a review of studies in experimental animals.. doi.org. https://doi.org/10.1016/j.reprotox.2013.06.074

Optimization of environmental performance of a car diesel engine running on natural gas by reducing carbon black in the exhaust gas

2020

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Optimization of environmental performance of a car diesel engine running on natural gas by reducing carbon black in the exhaust gas. (2020). doi.org. https://doi.org/10.1088/1757-899x/862/6/062046

The Influence of High Pressure Fuel injection on Performance and Exhaust Emissions of a High Speed Direct injection Diesel Engine

1989

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The Influence of High Pressure Fuel injection on Performance and Exhaust Emissions of a High Speed Direct injection Diesel Engine. (1989). doi.org. https://doi.org/10.4271/890438

菜種油を燃料とするディーゼル機関の性能と排気

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菜種油を燃料とするディーゼル機関の性能と排気. (n.d.). cir.nii.ac.jp. https://cir.nii.ac.jp/crid/1050845763156824064

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