The Cummins Engine Company was founded in Columbus, Indiana, in 1919 by William Glanton Irwin and Clessie Cummins, a local mechanic. It focused on developing the diesel engine invented 20 years earlier. Cummins designs, manufactures, and distributes engines, filtration, and power generation products. By 2013, Cummins had operations in 197 countries and territories.
| No. | Engine Family | Output Range (Prime Power Applications) | Number of Cylinders | |
|---|---|---|---|---|
| kVA | kWE | |||
| 1 | B Series | 20 - 140 | 16 - 112 | 4 - 6 (In Line) |
| 2 | C Series | 160 - 200 | 128 - 160 | 6 (In Line) |
| 3 | L Series | 250 - 285 | 200 - 228 | 6 (In Line) |
| 4 | M Series | 250 - 300 | 200 - 240 | 6 (In Line) |
| 5 | NTA855 Series | 225 - 400 | 180 -320 | 6 (In Line) |
| 6 | QSZ Series | 450 - 500 | 360 - 400 | 6 (In Line) |
| 7 | KTA19 Series | 450 - 650 | 360 - 480 | 6 (In Line) |
| 8 | KTA38 Series | 750 - 1135 | 600 - 800 | 12 (V) |
| 9 | KTA50 Series | 1250 - 1400 | 1000 - 1360 | 16 (V) |
| 10 | QSK38 Series | 1000 - 1275 | 800 - 1020 | 12 (V) |
| 11 | QSK50 Series | 1400 - 1800 | 1120 - 1440 | 16 (V) |
| 12 | QSK60 Series | 1875 - 2000 | 1500 - 1600 | 16 (V) |
| 13 | QSK78 Series | 2750 | 2200 | 18 (V) |
| 14 | QSK95 Series | 3750 | 3000 | 16 (V) |
