MAN Unveils Advanced Common Rail Injection System for Medium-Speed Engines

MAN Energy Solutions has introduced a new generation of its Common Rail injection system for its medium-speed, four-stroke engine lineup. The system includes an optimized high-pressure pump and a newly developed injector, enhancing overall coherence. Initially launched with the MAN 49/60DF engine, the CR 2.2 system offers up to 38% increased rail pressure and over 33% longer intervals between overhauls for most components. With 35% fewer high-pressure connections, the system reduces the risk of leaks and improves serviceability.

Stefan Eefting, Senior Vice President of MAN PrimeServ Germany, highlighted a key development in bringing production in-house to reduce dependency on subcontractors. This shift simplifies the technical aspects and results in a modular system adaptable to various engine sizes. The new system has undergone successful testing with over 30,000 engine hours on different fuels. The CR 2.2 system will eventually replace the CR 1.6 predecessor, which has accumulated over 17 years of field experience on numerous engines and cylinders.

The CR 2.2 common-rail fuel-injection system offers increased system pressure up to 2,200 bar to meet future emission standards while optimizing fuel consumption. It features an electronically-controlled injector with an accumulator for flexibility in multiple injections and stability during injection events. The modular design simplifies service and maintenance, accommodating various fuels like HVO and FAME. With proven technology and safety functions from the CR 1.6 system, the CR 2.2 system reduces fuel-oil consumption, soot emissions, mechanical load, vibration, and noise.

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