JCB has been producing many of its own engines since 2004 and this year went into production with the JCB Ecomax engine, which meets EU Stage IIIB/US Tier 4 Interim emissions standards without the need for a diesel particulate filter (DPF) or external exhaust after treatment.
However, it does not have a complete range of sizes and so still uses engines from other manufacturers as well for some machines.
JCB has now announced it is adopting a range of Stage IIIB/Tier 4 Final engines from Kohler’s Global Power Group for many of its compact machine lines. The water-cooled Kohler Direct Injection (KDI) engines, being branded JCB Diesel by Kohler, meet the next stage of emissions regulations without the need for a diesel particulate filter (DPF).
The first JCB machine to be fitted with the new engine is a JCB 35D 4x4 Teletruk. This was previously powered by a Deutz 2011-L04W engine.
JCB director of engine programmes Alan Tolley said: “The decision to partner with Kohler to develop engines for JCB compact machines was driven by the synergy in the technologies used by JCB and Kohler to achieve stringent Tier 4 Final emissions legislation. Kohler’s achievement of Tier 4 Final without the need for a bulky DPF is fully in line with our own engine strategy and allows our designers maximum flexibility when it comes to meeting machine design and packaging requirements. These highly efficient engines will offer our customers improved performance and lower fuel consumption.”
The European-built engines will be progressively introduced in JCB products, including midi excavators, the Teletruk TLT35D, 406 and 409 compact wheeled loaders, the 190 and 205 skid steers and 190T and 205T compact tracked loaders, smaller 135, 155 and 175 skid steers and TM180 and TM220 articulated wheeled loading shovels.
The KDI engines use a common rail fuel injection system working at 2,000 bar pressures, cooled exhaust gas recirculation (EGR), four valves per cylinder and a diesel oxidation catalyst (DOC) within the exhaust system. Fuel consumption is up to 15% better than a similar output engine equipped with lower injection pressures and a DPF, JCB says.
There are two 1.9-litre three-cylinder engines, the KDI 1903M and the KDI 1903TCR, delivering 31kW (41hp) with 133Nm of torque and 42kW (56hp) with 225Nm of torque respectively. The 2.5-litre, four-cylinder KDI 2504M and KDI 2504TCR (pictured below) deliver 36.4kW (48.8hp) with 170Nm and 55.4kW (74hp) with 300Nm. The engines meet all JCB standards, with 500 hour maintenance intervals available on all models.
Kohler Engines president Tom Cromwell said: “Kohler is extremely proud to be appointed as JCB’s engine supply partner for a wide range of construction equipment with the Kohler KDI engines. Reflecting the significant investment made by Kohler within diesel engine innovation and technology, these compact engines enable the machines to meet the stringent EU Stage IIIB and EPA Tier 4 Final emission regulations without the use of a DPF, while delivering significant fuel savings for JCB customers. This aligns perfectly with JCB’s wider engine strategy.”