| | | The ultimate in emissions compliance, performance, and fuel economy John Deere PowerTech Plus engines include cooled EGR and VGT technologies for the ultimate in Tier 3/Stage III A efficiency and performance. The higher an engine's peak combustion temperature, the greater the amount of NOx created. Cooled EGR is an effective method of lowering peak combustion temperature. The concept is simple: With cooled EGR, measured amounts of exhaust gas are cooled and mixed with incoming fresh air to lower peak combustion temperatures, thereby reducing NOx. Another key feature of our Tier 3/Stage III A engines is the VGT, which helps drive cooled EGR. The VGT tailors the amount of recirculated exhaust gas that mixes with the fresh air. The amount of cooled EGR required is determined by load and speed. Thus, when the engine load increases, the engine control unit adjusts the VGT vanes to the appropriate pitch. | | High performance PowerTech Plus engines meet Tier 3/Stage III A emissions without sacrificing performance or fuel economy, which is best-in-class. John Deere has maintained or increased power output from all PowerTech Plus models. In many cases, power bulge, peak torque levels, transient response time, low-speed torque, and cold-weather starting have actually been improved compared to Tier 2/Stage II. Durability 1 PowerTech Plus Tier 3/Stage III A industrial diesel engines are designed for rugged off-highway operation, with features such as new power cylinder materials for unparalleled durability. Ease of installation Because we maintained our Tier 2/Stage II engine package size without derating power, changing over to Tier 3/Stage III A models is easier. John Deere PowerTech Plus models industrial take up less engine envelope space than many competitive diesel engines with similar horsepower. | | |
| | | To offset the increase in particulate matter caused by the reduction of NOx, we've taken the following steps: • Increased fuel injection pressure by utilizing HPCR fuel systems and electronic unit injector technology • Improved power cylinder components, resulting in reduced oil consumption • Adopted VGT to control transient smoke • Improved shape of the combustion bowl to maximize air/fuel mixing and optimize the combustion process, reducing the amount of emissions New technology The new ECU electronically controls the air-to-fuel ratio, multiple fuel injections, the amount of cooled EGR, and VGT output. Our patented ECU has twice the memory and five times the computing power of units found on other Tier 2/Stage II engines. This ECU also features snapshot diagnostics, which can record and store up to seven different sets of diagnostic data. | | |
| | | PowerTech Plus 4.5L 111 - 129 kW (149 - 173 hp) | | PowerTech Plus 6.8L 134 - 205 kW (180 - 275 hp) | | PowerTech Plus 9.0L 168 - 298 kW (225 - 400 hp) | | PowerTech Plus 13.5L 261 - 448 kW (350 - 600 hp) | | |