The 2.0 dCi (M9R) 4-cylinder diesel engine (launched in July 2005) features the latest technologies developed for the diesel market. Co-developed by Renault and Nissan, this 1,995 cc engine is the most efficient in its category, regardless of power levels. Smooth, powerful, silent and efficient with strong environmental credentials, it redefines the standards of diesel engines.
With its high torque, the 2.0 dCi delievers unrivalled driving pleasure at all engine speeds. Maximum torque is reached rapidly, providing smooth dynamic performance from the lowest engine speeds through to the highest, thanks to:
The 2.0 dCi ranks among the engines with the strongest environmental credentials. All versions comply with the European Euro 4 standard. Pollutant emissions of the 2.0 dCi are limited by: optimized fuel injection management; the exhaust gas recycling system. Some of the gas leaving the combustion chamber is immediately recovered and reinjected at intake. The temperature of this gas is also controlled (cooling). Result:
Positioned on the exhuast line, the filter traps the particles of soot produced by burning diesel fuel. When the filter is clogged with particles, the engine runs a regeneration cycle (every 300 - 1,200 km approimately). A second post-injection raises the temperature of the exhaust gases, burning off and destroying soot at around 600C. This leaves the filter clean and ready to resume its role as a particle trap!
The 2.0 dCi was designed to achieve minimum noise levels. An aluminum bed plate in the engine absorbs vibrations on the most powerful version, two crankshaft-driven balancer shafts rotate in opposite directions. This minimizes vertical oscillation of the engine caused by the movement of alternative weights (pistons, rod) and moving parts (rod, pistons) to reduce vibration linked to the 4-cylinder architecture. A twin-mass engine flywheel acts as an acoustic filter to reduce boom at low engine speeds.