Kubota’s long serving workhorse RK horizontal engine line up has just been strengthened with the release of the RT Plus engine range. The 10, 12.5 and 14 horse power engines mainly used in applications such as water pumps, generators and water propulsion are an engineering advancement, offering increased durability and fuel efficiency. The new RT Plus engines are available in both manual and electric start variants which will be released for sale in Australia in the second half of the year.
All RT Plus engines share the same direct injection combustion system. With the high efficiency of the DI system, fuel is injected directly into the combustion chamber. The subsequent combustion process resulting in heat and pressure is then transformed directly to the force that drives the piston head. This process results in enhanced horse power and improved fuel efficiency.
The pistons utilized in the RT Plus engines employ a unique deep troidal bowl design, engineered to allow the intake air to swirl in the bowl both quicker and smoother. The design also permits the precise ratio of intake air and fuel mixture to take effect. The resultant complete combustion process enhances the engine output, delivering increased levels of torque when operating at low RPM.
The new multi injection port increases the number of nozzle sprayer from 4 to 5, whilst down sizing injector puncture to cooperate with the high efficiency injection pump. Hence, pressure of up to 220 kg/cm can be achieved. Fuel is broken down into small particles and widespread to cover every combustion spot. This results in complete combustion and reduces air pollution. In addition, the nozzles incorporate an internal edge filter to minimize nozzle clogging as a result of dirt accumulation.
The RT Plus range of engines also offers durability advancements in many key areas. Engine valve durability has been addressed with the introduction of stainless steel valves that are more tolerant towards heat and corrosion. Engine pulley and belt durability has also been enhanced via the reduction of internal friction between the fan belt and engine pulley. The raw-edge power flex fan belt reduces internal friction in the rubber sheet via the enhanced ability to cling to the engine pulley. The new fan belt is superior to ordinary drive belts as its edges are made from canvas wrapped with rubber sheet. The filter element material is changed from metal to stainless steel to prevent rust, hence lessening the likelihood of erosion. The fuel tank base fixing bolts are also made more durable with a 30% increase in size, meaning that they are more capable of retaining their tension even under vibration
The RT Plus engine product line up commences with entry level manual start RT100 DI with a maximum output of 10 hp at 2400 RPM. The middle of the pack RT Plus model is the RT125DI which is available in both a manual and electric start variant. These engines have a maximum output of 12.5 hp at 2400 RPM. The range is completed with the electric start RT140DI-ES with a maximum output of 14hp at 2400 RPM.
For more information contact your local Kubota dealership or Kubota Tractor Australia on 1800 334 653 or email sales@kubota.com.au.
