September 16, 2012

Renault Trucks Euro-6 engines: Reliable and controlling fuel consumption

The new Euro-6 engines from Renault Trucks deliver reduced pollution and keep a check on fuel consumption. By combining different technologies, and selecting the one best adapted to the vehicles' different applications, the manufacturer offers its customers high-performance
engines that are reliable and deliver competitive fuel consumption.

Renault Trucks will present its Euro-6 compliant engines at the IAA show in Hanover. These will equip its trucks when the new standard becomes compulsory in January 2014 (January 2013 for new homologations). Considerably cutting polluting emissions, the new Renault Trucks Euro-6 engines will deliver high performance, reliability and optimised consumption. To comply with the new regulation, the manufacturer is using different technologies, choosing the most appropriate and efficient in regards to the engine's size and future application. This strategy will enable Renault Trucks to pursue a number of different aims: supply its customers with Euro-6 compliant engines, while at the same time offering competitive fuel economy, reliability and maintainability similar or superior to the previous Euro-5 engines.

Engines for the heavy-duty range (11 L and 13 L)
For its heavy-duty range, Renault Trucks will offer a new six cylinder 11 L engine to be known as the DTI 11. This will be available with three power ratings: 380 hp (1,800 nm), 430 hp (2,050 nm) and 460 hp (2,200 nm). Although its architecture has much in common with the Euro-5 engine, 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 post treatment system for reducing polluting emissions to comply with the Euro-6 regulation. In order to provide optimal performance, this system must operate at sufficiently high temperature. Renault Trucks meets this requirement by combining different solutions, such as exhaust gases recirculation during engine start-up phases, the use of controlled valves at the intake and the exhaust as well as specific combustion strategies.

The post treatment system is fitted with a particulate filter, as is the case with all Renault Trucks Euro-6 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 L 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 hp (2,200 nm), 480 hp (,2400 nm) and 520 hp (2,550 nm).

Engines for the medium-duty range (5 and 8 L)
For its medium-duty range, Renault Trucks has developed a new four cylinder, 5 L engine, to be known as the DTI 5. It will be available with 210 hp (800 nm) and 240 hp (900 nm) versions. As for the DTI 8, this features six cylinders in line with a displacement of 8 L. It will be available in 250 hp (950 nm), 280 hp (1,050 nm) and 320 hp (1,200 nm) versions.

The 5 and 8 L 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 type of injection with a maximum pressure of 2,000 bars. Due to the flexibility offered by multiple injections (up to 5 injection events per engine cycle) these engines deliver very high levels of performance in terms of consumption, noise and performance.

The new Renault Trucks engines comply with the Euro-6 standard while maintaining their high levels of performance, reliability and optimised consumption to serve the brand's customers even better.


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