8. Glossary – Definitions
Biogas
Raw gas resulting from the fermentation of organic waste, whose composition can vary widely.
Biomethane
Biogas purified to the minimum quality required for injection into the natural gas network.
Close-Coupled
The positioning of an aftertreatment system as close as possible to the engine to limit heat loss, rather than under the vehicle floor.
OBD (On Board Diagnostic )
On-board system (hardware and software) to monitor the correct operation of all processes involved in controlling exhaust pollutant emissions.
Lean burn
Combustion in which the mass quantity of air consumed is greater than the quantity corresponding to stoichiometry: in this case, we speak of...
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Glossary – Definitions
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