AMANA, Iowa (August 29, 2006) - Cummins Inc. (NYSE:CMI) showed its new QSB3.3 engine for the first time in North America at the 2006 Farm Progress Show held in Amana, Iowa. The power range of this 3.3-liter engine extends from 80 to 110 hp (60-82 kW) and is the first industrial engine of its size to incorporate full-authority electronic controls and a High Pressure Common Rail (HPCR) fuel system. At 110 hp (82 kW), the Tier 3 QSB3.3 offers equivalent performance to that of larger 4.0- to 4.5-liter engines - but with the fuel economy and installation advantage of a 3.3-liter-size engine.
"The QSB3.3 doesn't just contradict conventional thinking about compact power - it rewrites the rules," commented Marco Rangel, Director of Cummins Agricultural Business." This new engine moves beyond the capability of other 3.3-liter engines to offer the same 110 hp (82 kW) typically found in the 4.0- to 4.5-liter engine class - but now with an engine package over 30% smaller and lighter. And with an optional structural oil pan, this engine is ideal for compact tractors, skid steers and other farm equipment.
"The QSB3.3 achieves this by combining our farm-proven compact 3.3-liter platform with the performance-enhancing technology of Cummins Quantum electronics and HPCR fuel system similar to that found on engines such as the QSB4.5 and QSB6.7. As a result, power is increased by around 30% and peak torque by 40% without impacting fuel consumption. The top-rated 110- hp (82 kW) QSB3.3 meets Tier 3/Stage IIIA emissions levels, yet achieves better fuel efficiency than the lower-rated 85-hp (63 kW) mechanical B3.3 at Tier 2/Stage II. We expect the QSB3.3 to offer an ideal power solution for compact equipment varying from skid steer loaders and mowers to compact tractors," added Rangel.
The QSB3.3 provides a seamless electronic integration with equipment using a CANbus J1939 public data link. With Cummins PowerMatch installation software, the engine can be electronically calibrated with a torque curve and feature set ideally suited to individual applications. Electronic features such as auto-derate engine protection, idle shutdown and diagnostics bring significant operational advantages. The ability to download engine duty cycle and fuel consumption data provides information to help manage the cost of farm equipment operation.
The QSB3.3 has improved power delivery across the rpm range. Cummins HPCR fuel system enables high-pressure fuel injection from 11,600 to 16,000 psi (800 to 1100 bar) to be maintained independent of engine rpm speed. Combined with precision electronic control of fuel metering and timing, this results in easier cold starting, improved idle stability and faster load acceptance.
"The QSB3.3 was specifically designed to offer the strength and durability of a 4.5-liter engine, but within a smaller and lighter envelope," explained Scott Towsley, Chief Engineer of the QSB3.3. "In fact, with a peak torque of 304 lb-ft (412 N•m) - available at 1400 rpm and faster - and electronically controlled load response, the QSB3.3 will outperform some of these larger engines in terms of machine productivity.
"The engine has the advantage of evolving from the proven, reliable B3.3 platform already incorporating heavy-duty features associated with larger Cummins engines. These include a cast-iron parent bore cylinder block with structural ribs; camshaft, crankshaft and rods, all made of forged steel; and a one-piece aluminum piston. The QSB3.3 is a rock-solid and dependable design," added Towsley.
The QSB3.3 is set to establish new standards of engine sociability for compact equipment. Noise has been dramatically reduced to just 75 dBA at idle and only 88.9 dBA at full load for the 110-hp (82 kW) rated QSB3.3. The engine offers exceptionally clean operation with visible smoke reduced as low as 0.6 Bosch opacity at torque peak. Together with low vibration levels, these improvements add up to a more comfortable and productive operating environment.
The 110-hp (82 kW) rated QSB3.3 is ready to meet Tier 3/Stage IIIA emissions standards ahead of the 1/1/2007 effect date for this power output. Four other power ratings are available, including 80 hp (60 kW), 85 hp (63 kW) and 95 hp (71 kW) to 99 hp (74 kW). These ratings will be initially certified to meet current Tier 2/Stage II emissions regulations and then certified for Tier 3/Stage IIIA well ahead of the 1/1/2008 effect date for the engines below 100 hp (75 kW) power band. The QSB3.3 meets lower emissions standards without the complexity of Exhaust Gas Recirculation (EGR) found on many other competitive industrial engines. Cummins advanced in-cylinder combustion formula is a simpler, more robust and proven off-highway solution. It also means that the QSB3.3 can safely operate on fuel with a high sulfur content anywhere in the world.
Cummins Inc., a global power leader, is a corporation of complementary business units that design, manufacture, distribute and service engines and related technologies, including fuel systems, controls, air handling, filtration, emission solutions and electrical power generation systems. Headquartered in Columbus, Indiana (USA), Cummins serves customers in more than 160 countries through its network of 550 company-owned and independent distributor facilities and more than 5,000 dealer locations. Cummins reported net income of $550 million on sales of $9.9 billion in 2005.