Deere unveils Tier 4 technology, terminology
| April 22, 2009 |
Intermat Day 2, written by John Latta.
John Deere brought new engines to Intermat in Paris to show off the technology solutions it will use to meet the stringent Interim Tier 4/Stage III B mobile off-highway emissions regulations in the company’s complete lineup of industrial diesel engines. The engines are literally fresh out of the box. Before Paris, the technology involved has been known but not seen installed on actual power plants.
For all of its engines 56 kW (75 hp) and above, Deere will start with its Tier 3/Stage III A PowerTech Plus engine platform, which includes cooled exhaust gas recirculation (EGR) for NOx control, and add an exhaust filter for reducing particulates. Displacements in this power range include the 4.5L, 6.8L, 9.0L and 13.5L in-line, four- and six-cylinder engines, all of which feature a four-valve cylinder head, high-pressure fuel system, turbocharging and an air-to-air aftercooling system.
John Piasecki, director of worldwide marketing, sales and customer support for John Deere Power Systems said that the company elected not to use SCR. It may be an appropriate technology for the future, he said, when the technology is more developed for off-highway applications. ” The single-fluid approach of cooled EGR means the technology will be easy for operators to use, and they won’t have to incur the cost of diesel fuel plus the urea required by SCR systems. We are using the most operator-friendly technology available today,” Piasecki said.