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Cars

Vehicle systems, components and the ideas behind them.

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Cars

SCR and AdBlue: dosing in the exhaust system

SCR is a process for reducing nitrogen oxides. AdBlue is a reagent for the exhaust system and should be different from fuel and from particle filtration.

Published22 Oct 2026
Cars

Spark plug: the place where the spark is created

The candle is involved in the ignition of the mixture in a spark engine. It works with the rest of the ignition system and should not be mixed with a glow plug.

Published22 Oct 2026
Cars

Start-stop: why the engine sometimes stays on

The automatic braking and re-starting of the engine depends on the conditions and handling of the vehicle. Refusal to activate is not a self-diagnosis for a damaged battery.

Published22 Oct 2026