Borg Warner Turbocharger

By: Borg Warner News Release

U.S. agricultural and construction equipment manufacturer John Deere relies on turbochargers with variable turbine geometry (VTG) from BorgWarner in keeping its engines fit for strict emissions standards.

The turbocharged PowerTech Plus™ diesel engines are fitted in agricultural and construction machinery, in machines for forestry applications and in OEM applications.

The background to the collaboration between John Deere and BorgWarner Turbo Systems includes the new Interim Tier 4/Stage III B emissions standard for "off-highway applications". This standard stipulated 50 % lower nitrogen oxide emissions than former standards. The boosting technologies from BorgWarner help ensure that John Deere equipment met the new standard.

Many years of successful cooperation.

The key collaboration between John Deere and the turbocharger specialist started back with the development of Tier 3 compliant engines. The two companies have set new standards in the off highway segment with the use of the cooled exhaust gas recirculation (EGR) and VTG turbocharger technology.

With cooled exhaust gas recirculation, the exhaust gases are initially cooled and then fed back to the fresh air feed to reduce the amount of nitrogen oxide. Compared to the turbocharging systems of other manufacturers, BorgWarner's VTG turbochargers offer more accurate control of the exhaust gas recirculation. Precise opening and closing of the turbine vanes allows the exhaust gas pressure and inlet pressure to be optimally balanced.

With Interim Tier 4-compliant engines, all VTG BorgWarner turbochargers were also equipped with the compact brushless actuator (CBA) that is specifically designed for use in highly stressed turbochargers and EGR valves.

John Deere tractor sets new records

The VTG technology from BorgWarner has already allowed John Deere Power Systems to significantly reduce fuel consumption over Tier 2/Stage II engines - even in the toughest of operating conditions.

A good example of this is the PowerTech Plus™ 9.0L engine, which employs a BorgWarner S300V VTG turbocharger. Equipped with this high-tech engine, the John Deere 8430 Tractor was able to achieve an 8.8 % improvement in diesel economy, making it the most fuel efficient row crop tractor ever tested by the famous Nebraska Tractor Test Laboratory.

The turbocharger specialist's commercial vehicle turbochargers with VTG technology are uncompromising designs geared to handling extreme environmental and operating conditions in tough off-highway applications and also offer the excellent reliability that customer in the commercial vehicle segment demand.