School Bus Transportation News at STN Media

John Deere Power Systems 8.1L Natural Gas Engine Backgrounder

John Deere Power Systems recently announced their 8.1L natural gas engine has been certified to Environmental Protection Agency (EPA) emissions levels and California Air Resources Board (CARB) optional low NOx standards 1.2 g/bhp-hr for MHHD, HHDD, and urban bus vehicles. John Deere 8.1L natural gas engines offer a power range of 250 hp - 280 hp and feature 735 ft-lb - 900 ft-lb of torque. The 8.1L engine is available in compressed natural gas or liquid natural gas .

John Deere will also offer a 9.0L natural gas engine in 2007. The new engine will be certified to 2010 emissions levels of 0.2 g/bhp-hr for MHHD, HHDD, and urban bus vehicles. This engine will offer an expanded power range of 250 hp - 300+ hp and a peak torque of 1050 ft-lbs at the maximum rating, which will help optimize vehicle low-end performance. The 9.0L engine will be available in compressed natural gas or liquid natural gas.

Since entering the natural gas market, John Deere has developed many features to deliver reliability, performance, and cost-effectiveness. The fuel-management system delivers diesel-like fuel economy and drivability, and the high-torque engines have plenty of power for pulling grades and carrying heavy loads. The engines also offer drivers great acceleration and handling, even under load and at higher altitudes. In addition, advanced electronics and excellent engine-management controls work with other technologies to enable John Deere natural gas engines to offer extended oil maintenance intervals.