CO2, the main greenhouse gas, is emitted via combustion as soon as a vehicle is started. This is why Renault engineers are working on optimizing combustion. The objective is to increase performance while cutting consumption and emissions.
Renault created the low pressure EGR (Exhaust Gas Recirculation) system to reduce nitrogen oxide (NOx) emissions from combustion.
Using several injectors in the diesel burning process also optimizes combustion. This multi-injection diesel process reduces pollutant emissions and engine noise.
In the future, the HCCI diesel engine (Homogenous Charge Compression Ignition) and CAI gasoline engine (Controlled Auto Ignition) will emit practically no soot or NOx. The secret: reabsorbing part of the burnt gas to enable “cold” combustion.
Lastly, downsizing, a Renault expertise area, has a two-fold advantage. By reducing engine capacity, it cuts CO2 emissions while increasing performance.