Renault Trucks has revealed its new Euro 6 engines, which it claims delivers reduced pollution and keeps a check on fuel consumption. For its heavy-duty range, the French manufacturer is offering a new six-cylinder 11-litre engine designated the DTI 11.
This will be available with three power ratings: 380 bhp (1800 Nm), 430 bhp (2050 Nm) and 460 bhp (2200 Nm). Although its architecture has much in common with the Euro 5 engine, Renault said this latest model breaks new ground with its injection and depollution systems. Injection is based on a common rail system, which offers the main advantage of supplying extremely accurate and high pressure injection, even at low engine speeds. The DTI 11 engine is combined with an SCR (selective catalytic reduction) aftertreatment system for reducing polluting emissions to comply with the Euro 6 regulation.
To provide optimal performance, this system must operate at a sufficiently high temperature. Renault is meeting this requirement by combining different solutions, such as exhaust gas recirculation (EGR) during engine start-up phases, the use of controlled valves at the intake and the exhaust as well as specific combustion strategies. Finally, the post-treatment system is fitted with a particulate filter, as is the case with all Renault Trucks’ Euro 5 engines. This enables the level of particle emissions to be considerably reduced, capturing virtually all of them, even the very smallest. This technology has also been chosen for the new six-cylinder 13-litre engine.
However, this model features an electronic pump injector system, which is particularly suitable for engines with this displacement. The DTI 13 will be available with the following power ratings: 440 bhp (2200 Nm), 480 bhp (2400 Nm) and 520 bhp (2550 Nm). For its medium-duty range, Renault has developed a new four-cylinder, five-litre engine designated DTI 5. It will be available with 210 bhp (800 Nm) and 240 bhp (900 Nm) versions. As for the DTI 8, this features six-cylinders in line with a displacement of eight litres. It will be available in 250 bhp (950 Nm), 280 bhp (1050 Nm) and 320 bhp (1200 Nm) versions. The five- and eight-litre Euro 6 engines are fitted with an EGR system. This recycles part of the exhaust gases during combustion and reduces the amount of nitrogen oxide (NOx) produced by the engine.
The remaining NOx is then eliminated by catalysis via the SCR system. Finally, the particulate filter enables the vehicle to comply with the very low level of particle emissions demanded by the new standard.
Furthermore, this engine is equipped with a common-rail injection with a maximum pressure of 2000 bars. Thanks to the flexibility offered by multiple injection (up to five injection events per engine cycle), these engines deliver very high levels of performance in terms of consumption, noise and performance.