Paris, France (April 24, 2006) - Today Cummins Inc. (NYSE:CMI) launched the new QSB3.3 engine at the INTERMAT exhibition (April 24-29) with a power range extending from 80 to 110 hp (60 to 82 kW). Meeting EPA Tier 3 and EU Stage IIIA emissions, the QSB3.3 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 QSB3.3 offers equivalent performance to that of larger 4.0- to 4.5-liter engines - but with the installation advantage and economy of a 3.3-liter-size engine.
"The QSB3.3 doesn't just contradict conventional thinking about compact power - it rewrites the rules," commented Chris Kete, Director of Cummins Light Construction Business. "This new engine moves beyond the capability of other 3.3-liter engines to offer the same 110 hp (82 kW) associated with the 4.0- to 4.5-liter engine class - but now with an engine package over 30% smaller and lighter.
"The QSB3.3 achieves this by combining our compact 3.3-liter platform with the performance-enhancing technology of Quantum electronics and HPCR similar to that found on Cummins 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 the same fuel efficiency as 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 rollers to site dumpers and backhoe loaders," added Kete.
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 rapid diagnostics bring significant operational advantages. The ability to download engine duty cycle data is a useful feature for rental equipment operations.
Improved power delivery across the rpm range is a noticeable feature of the new QSB3.3. 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, extending from 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 re-certified for Tier 3/Stage IIIA well ahead of the 1/1/2008 effect date for the below 100 hp (75 kW) power band. The QSB3.3 meets lower emissions standards without resorting to 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.