Ausgabe zur AGRITECHNICA 2019

30 Ausg.Nr._20/2019 innovations F or years, Agritechnica has been regarded as the world's most important platform for innovations in ag- ricultural machinery, not least because of the Agritechnica In- novation Awards. In the run-up to the 2019 trade fair, numerous products have once again been presented by manufacturers and registered for this innova- tion competition. The following contribution aims to provide an overview of the most important innovations and the trends that can be determined from them. Exhaust emission legislation remains a technology driver Since January 2019, diesel en- gines in new tractors of more than 130kW have been required to adhere to Stage V exhaust emission limits; from January 2020, this will also be the case for the output class from 56- 130kW. In terms of particulate emissions, the tighter weight limit values (g/kWh) have been joined by an additional limit for the number (total particles/ kWh), making closed-loop par- ticulate filter systems unavoida- ble. Some tractor manufacturers have completed the shift to ex- haust emission Stage V engines on existing model series with- out a great deal of fuss in 2019, whereas others coupled this to the development and presenta- tion of new models. Common rail fuel injection, four- valve technology, turbochargers, charge air cooling, viscous fans and electronic engine manage- ment remain the engine technol- ogy mainstays for reconciling the requirements of power output, consumption and emissions. Familiar technologies are also being implemented in terms of exhaust emission technologies. The diesel oxidation catalytic converter (DOC), diesel particu- late filter (DPF) and selective catalytic reduction (SCR) exhaust gas aftertreatment systems are always fitted in exhaust emission Stage V engines on agricultural tractors; as regards exhaust gas recirculation (EGR), differences are now only to be found in the form of internal engine technol- ogy for the avoidance of nitrogen oxide formation. On the whole, a trend towards reduced recir- culation rates, or even complete omission, is now emerging. Be- sides CNH, as a long-standing advocate of SCR-only, Fendt, for example, is now also doing away with EGR in its new Vario 900 large tractor model series. The DOC, DPF and SCR exhaust gas aftertreatment systems are increasingly being contained in compact single modules and po- sitioned outside of the engine area. A typical example of this is the all-in-one solution from Mas- sey Ferguson for the 6700S and 7700S model series. CNH is us- ing new SCRoF systems in which the DPF has an SCR coating and therefore partly undertakes ni- trogen oxide reduction. The com- plete exhaust gas aftertreatment system, consisting of DOC, a coated DPF and smaller SCR thus takes up barely more installation space than the previous Stage IV exhaust emission systems with DOC/SCR. The medium-size class model series with four- and six- cylinder engines from all three CNH Group brands have now also been joined by the re-engineered Case IH Magnum AFS Connect large tractor model series with SCRoF technology (six-cylinders, 8.7 litre engines). A paradigm shift is taking place in the topic of power boosts. Previously falling squarely in the non-boost camp, Fendt is now im- plementing a sensor-controlled solution called “Fendt Dynamic Performance” in its new Vario 314, thanks to which the same ba- sic output is always available for actual work. This boost power is activated variably depending on the power required by ancillary consumers such as the fan, al- ternator, air conditioning system and air compressor. As a propo- nent of abundant power boost, Case IH is shifting in the opposite direction and ensuring that the rated and maximum power (397hp and 435hp) are available under all operating conditions in its new Magnum 400 model. Numerous tractor prototypes with gas engines have been presented in the past, but none of them ever made it to the market. New Hol- land is now the first manufacturer to present a tractor with a gase- ous fuel drive that is fit for series production among the brand’s T6 series. Additional CNG tanks are planned to extend the operating time; these are carried in a spe- cial frame on the front hydraulics and can be connected to the main tanks on the tractor by means of quick couplings. In terms of the drive, the manufacturer is imple- menting the 'Natural Power' unit with six cylinders and a displace- ment of 6.0 litres from its sib- ling company FPT. This operates according to the spark ignition principle, and is therefore pow- ered exclusively with gas. First gearbox with electro- mechanical power split Thanks to their high full load effi- ciencies and longevity, powershift gearboxes continue to hold their ground, particularly on farms with high percentages of heavy pulling work. New or improved partial and full powershift gearboxes have therefore been presented time and again in the recent past. Case IH is now also extending the familiar 18/4 and 19/4 versions Trends in tractors