The new engines are found in the Komatsu 901, Komatsu 911, Komatsu 931, and Komatsu 951 harvesters.
Komatsu Forest's new harvester engines comply with the latest emission control requirements of Stage IV and Tier 4 Final. This enables the engines to have low emission levels and still achieve reduced fuel consumption without compromising on engine power. The new engines are all being exhibited at Skogsnolia, taking place from 11 to 13 June 2015 in Umea, Sweden. The new harvester engines feature Selective Catalytic Reduction (SCR) technology with high injection pressure, exact timing, and effective charge air cooling. Komatsu indicate that this creates a strong engine, rapid engine response, low particulate emissions, and low fuel consumption. The interaction between the harvester's engine, control system, and transmission is able to better utilise the new engine's high performance and improves handling on steep terrain. Komatsu also claims that the system is able to automatically increase traction at lower speeds, enabling the harvesters to pass obstacles with greater ease compared to machines with conventional hydrostatic transmission systems, while reducing fuel consumption. The result is productivity maximisation through efficient engine power utilisation and low fuel consumption. Komatsu have indicated that will also be unveiling a new head at Skogsnolia, along with the new ProAct 2.0 service and maintenance system and the MaxiFleet fleet management system. Source: http://www.komatsuforest.com/default.aspx?id=1848&newsid=135024