Massey-Ferguson: a new tractor of 370 hp

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Massey-Ferguson: a new tractor of 370 hp
Tuesday, July 15, 2008Description :
The new MF 8690 with 370 hp is equipped with the all-new 8.4-liter Citius Sisu Diesel engine, equipped with 4 valves per cylinder and common rail injection. It develops 370 hp of maximum power and is the first agricultural engine on the market to have Selective Catalytic Reduction (SCR) that reduces emissions of nitrogen monoxide.

SCR technology would be widely recognized as the most fuel-efficient method to meet future emission standards. Today it is the solution chosen by the main manufacturers of commercial truck tractors such as DAF, Mercedes-Benz, Volvo and Renault Trucks.

The two main exhaust emissions are NOx and particulate matter. All governments today agree to work towards reducing NOx emissions, responsible for high concentrations of acid rain, severe respiratory problems and possible visual problems. It is also a greenhouse gas.

While emissions have already been reduced by half, the introduction of the Tier 4 / Stage 4 standard in 2014 will require an additional 75% reduction in NOx emissions.

The challenge in terms of engineering that must be won is to meet emission standards for cleaner air while meeting the strong demand for fuel economy.

After considering all possible options, SISUDiesel and Massey Ferguson engineers selected Selective Catalytic Reduction (SCR) because it would allow for significant fuel savings and allow for cleaner emissions compared to alternative solutions.

The SCR system of SisuDiesel Citius engines treats exhaust gases using the AdBlue fluid. AdBlue is a registered trademark but the same liquid is also known as AUS32 or DEF (Diesel Exhaust Fluid). AdBlue is no more than a water-based urea solution that is precisely dosed and then injected via a Bosch® control system into the exhaust system with a catalytic reactor. The AdBlue is stored in a separate tank and is consumed at a rate of about 3% AdBlue / Diesel.

AdBlue is easily found at many distributors. One of the recommended suppliers is Brenntag through its Air1 brand.

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