John Deere releases 8.1L and 9L natural gas engines 
(15/08/2007)
John Deere Power Systems has launched the 8.1L natural gas engine will soon release the 9.0L natural gas engine.
The 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 and 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.
The 9.0L engine was unveiled at the APTA conference in September 2005 and will be available 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 offers 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.
John Deere began exploring natural gas engine technology in 1995, and since then, the number of John Deere natural gas engines in the United States has continued to expand. They have been installed in school and transit buses, as well as refuse and utility trucks. Natural gas engines release significantly less harmful emissions, dont have the unpleasant smell associated with other fuels, and they produce less noise. In fact, the noise generated by running nine natural gas engines equals the noise generated by one diesel engine.
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, and they 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.
In addition to the on-highway natural gas engines, John Deere Power Systems manufactures 30 kW 448 kW (40 hp 600 hp) engines for use in a variety of non-road applications.
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