Perfect engine from John Deere: PowerTech ™ PWL 4.5L engine
According Engine Diesel John Deere Power Systems tore the mask from its newest PowerTech ™ PWL 4,5L engine which meets environmental standards of Final Tier 4/Stage IV. The motor is added to the previously demonstrated range of John Deere engines Final Tier 4/Stage IV with power output ranging from 48 to 600 hp.
Interestingly, that the engine is not equipped with a diesel particulate filter. The need for it has disappeared due to the increased efficiency of the SCR technology and the optimization of the combustion system.
PowerTech PWL with working volume at 4.5 L has the third generation of Integrated Emission Control system. This technology implies a selective catalytic reduction system (SCR), diesel oxidation catalyst (DOC) and cooled exhaust-gas recirculation (CEGR). This system will be installed only on engines with power ratings 75 - 140 hp. Engines with lower power output (48 - 74 hp) will be equipped with a DOC only, without SCR and CEGR.
John Deere motors, referred to manufacturer, will has a small consumption of diesel exhaust fluid per liter of fuel, namely 1 - 4%, depending on the circumstances. This gives the advantage to use a smaller DEF-tank and to extend the life of the exhaust filters.
By the way, here`s a transcript of John Deere abbreviations for you. This refers to the three letters after the name of the motor model. The first letter indicates the technology:
The second letter symbolizes the type of turbocharger:
The last symbol means PM aftertreatment: