The Cummins M-series engine is a

straight-six A 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 balanc ...

diesel engine The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...

designed and produced by

Cummins Cummins Inc. is an American multinational corporation, multinational corporation that designs, manufactures, and distributes engines, electric vehicle components, and power generation products. Cummins also services engines and related equipmen ...

. 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 Power may refer to: Common meanings * Power (physics), meaning "rate of doing work" ** Engine power, the power put out by an engine ** Electric power, a type of energy * Power (social and political), the ability to influence people or events Math ...

( vs. ) and peak

torque In physics and mechanics, torque is the rotational analogue of linear force. It is also referred to as the moment of force (also abbreviated to moment). The symbol for torque is typically \boldsymbol\tau, the lowercase Greek letter ''tau''. Wh ...

Applications

* Large

transit bus A transit bus (also big bus, commuter bus, city bus, town bus, urban bus, stage bus, public bus, public transit bus, or simply bus) is a type of bus used in public transport bus services. Several configurations are used, including low-floo ...

es (40 feet and up).Cummins engine ratings
Cummins website, 2009, accessed 2010-08-18. *

Coaches Coach may refer to: Guidance/instruction * Coach (sport), a director of Athletes' training and activities * Coaching, the practice of guiding an individual through a process ** Acting coach, a teacher who trains performers Transportation * Coac ...

* Large

fire truck A fire engine or fire truck (also spelled firetruck) is a vehicle, usually a specially designed or modified truck, that functions as a firefighting apparatus. The primary purposes of a fire engine include transporting firefighters and water t ...

s * Heavy-duty trucks * 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