JCB has launched new backhoe loaders and telescopic handlers, as well as several mid-sized excavators, which is compliant to the latest Stage IIB/Interim Tier 4 emissions requirements without the use of exhaust aftertreatment systems. This achievement, which is unique in the industry, is owing to the use of JCB's own 4 cylinder Eco Max diesel engine in the machines, which has been specially designed to meet the new standards.
"While most manufacturers chose to reduce particulate matter (PM) with a diesel particulate filter (DPF), JCB chose to innovate and deal with the problem at source," said JCB engine service manager, Ollie Howlett. He added, "The new combustion chamber is where the magic starts to happen. It is a very different burn process - cleaner and more efficient."
The company says there are several advantages to not having to use aftertreatment. The absence of these bulky components reduces cost and often aids visibility for the operator, because engine compartments can be kept small.
In addition, JCB says it has achieved between 5% and 10% fuel economy compared to the Stage IIIA/Tier 3 versions of its engines. Further operational savings come standard oils can be used, rather than the low ash oils that are required with aftertreatment systems. The company says low ash oils are around +30% more expensive than standard lubricants.
There is also no need to periodically clean or replace aftertreatment systems such as the DPF, and there is also no need to use the urea-based diesel exhaust fluids (DEF) that are required by selective catalytic reduction (SCR) aftertreatment systems.
"No DPF means no need to buy costly filters and no aftertreatment means no additives," said group engineering director Mick Mohan.