John Deere Power Systems Putting Forth The Naming Convention

John Deere Power Systems (JDPS) has recently announced both the naming convention and the power ratings for the company’s Final Tier 4/Stage IV mobile off-highway diesel engine line-up.
Referring to previous tier terminology, John Deere Final Tier 4/Stage IV engine names will commence with the PowerTech™ brand and then add a three - letter suffix in order to specify the engine’s technology package. In case of Final Tier 4/Stage IV engine, the three letters are supposed to identify the mechanism’s technology platform, the turbocharger and aftertreatment. The exemplary name of John Deere Final Tier4/Stage IV engine would be PowerTech PSS 6.8L.
 

All John Deere Final Tier 4/Stage IV engines with power ratings 56 kW (75hp) and these have been designated “P” which indicates the Tier 3/Stage III A Power Plus technology platform, featuring 4-valve cylinder heads, full – authority electronic controls, cooled exhaust gas recirculation and air-to-air aftercooling. These engines utilize a variable geometry turbocharger, series turbochargers or a waste turbocharger ( designated “V”, “S” and “W” respectively). The afterteatment technology for engines 56 kW (75 hp) involves the exhaust filter and selective catalytic reduction, which gives the combination designated “S”.