Clean Diesel Engine
The 4N13 1.8-liter / 4N14 2.2-liter diesel engines realize low fuel consumption, low emissions, and low combustion noise. (to European market)
Mitsubishi Motors Corporation (MMC) has developed a Euro 5-regulation 4N13 1.8-liter/4N14 2.2-liter passenger-car diesel engines in which a low compression ratio is combined with the Mitsubishi Innovative Valve timing Electronic Control system (MIVEC). By setting the compression ratio at the lowest of any passenger-car diesel engine (14.9), MMC achieved a superior combination of full-load performance, fuel economy, emissions performance, and combustion noise. To overcome the challenge of achieving stable cold startability and unburned-hydrocarbon emissions, MMC used the MIVEC to advance the closing timing of the intake valves for an increased effective compression ratio; and reduce the lift of one intake valve for enhanced swirl. MMC had started to export passenger cars equipped with this next-generation low-compression-ratio diesel engine to Europe, the 4N13 1.8-liter diesel engine is on May 2010 and the 4N14 2.2-liter one is on July 2010.
MIVEC Realizes a Low Compression Ratio
The 4N1 diesel engine is the first diesel engine in the world to employ a variable valve mechanism (Mitsubishi Motors' unique MIVEC) to resolve the various problems in achieving a low compression ratio. At the same time, it features a structure that also has a swirl control function based on low lift of one intake valve.