The Cummins M-series engine is a

straight-six The straight-six engine (also referred to as an inline-six engine; abbreviated I6 or L6) is a piston engine with six cylinders arranged in a straight line along the crankshaft. A straight-six engine has perfect primary and secondary engine bal ...

diesel engine The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-ca ...

designed and produced by

Cummins Cummins Inc. is an American multinational corporation that designs, manufactures, and distributes engines, filtration, and power generation products. Cummins also services engines and related equipment, including fuel systems, controls, air ...

. It displaces . Introduced as the M11 in 1994, it was built on the previous L10 engine (same

cylinder bore In a piston engine, the bore (or cylinder bore) is the diameter of each cylinder. Engine displacement is calculated based on bore, stroke length and the number of cylinders: displacement = The stroke ratio, determined by dividing the bore b ...

, but a longer piston stroke compared to the L10's stroke). Later M11's received the electronic CELECT and CELECT Plus fuel systems consisting of a gear pump and solenoid controlled injectors. The M11 CELECT Plus became the ISM when Cummins applied its Interact System (hence the "IS" in ISM) to the M11 CELECT Plus in 1998 to further improve the engine. The ISM is available in four configurations, with slightly-different emphasis on maximum power ( vs. ) and peak

torque In physics and mechanics, torque is the rotational equivalent of linear force. It is also referred to as the moment of force (also abbreviated to moment). It represents the capability of a force to produce change in the rotational motion of t ...

Applications

*Large

transit bus Transit may refer to: Arts and entertainment Film * ''Transit'' (1979 film), a 1979 Israeli film * ''Transit'' (2005 film), a film produced by MTV and Staying-Alive about four people in countries in the world * ''Transit'' (2006 film), a 2006 ...

(40 feet and up).Cummins engine ratings
Cummins website, 2009, accessed 2010-08-18. * Coaches * Large fire truck * Heavy-duty truck * Off-Highway (QSM11)

Popular power ratings

;Urban bus : @ 1200 rpm, (209 kW) electronically governed at 2,100 rpm : @ 1200 rpm, (246 kW) electronically governed at 2,100 rpm ;RV, Truck, Motorcoachhttp://www.cummins-sp.com/document_library/Engine%20Ratings/ISM_engine_ratings.pdf : @ 1200 rpm, (209 kW) electronically governed at 2,100 rpm : @ 1200 rpm, (246 kW) electronically governed at 2,100 rpm : @ 1200 rpm, (209 kW) electronically governed at 2,100 rpm : @ 1200 rpm, (246 kW) electronically governed at 2,100 rpm : @ 1200 rpm, (209 kW) electronically governed at 2,100 rpm : @ 1200 rpm, (246 kW) electronically governed at 2,100 rpm : @ 1200 rpm, (246 kW) electronically governed at 2,100 rpm : @ 1200 rpm, (246 kW) electronically governed at 2,100 rpm : @ 1200 rpm, (246 kW) electronically governed at 2,100 rpm : @ 1200 rpm, (246 kW) electronically governed at 2,100 rpm : @ 1200 rpm, (246 kW) electronically governed at 2,100 rpm

References

External links

Cummins ISM
Cummins diesel engines Diesel engines by model Straight-six engines {{automotive-part-stub