Cummins ISB
The Cummins ISB, introduced in 1997, is an inline 4 or 6 cylinder diesel engine used in passenger vehicles with displacements of 4.5 litres and 6.7 litres respectively. The ISB was the product of applying Cummins' Interact System to the and 4 cylinder B3.9 and 6 cylinder B5.9. In North America, the 2010 ISB, known as the ISB6.7 is now only available in a 6 cylinder engine. The ISB out side of North America, known as the ISBe, is still available in 4 or 6 cylinders. Intially the ISB still had the 3.9 and 5.9 displacements of their predecessors. The displacements were later increased to 4.5 and 6.7 when the ISB was reworked to meet EPA 2007 and Euro 4 standards.
One unusual feature of the ISB is that it is a multi-valve pushrod engine design. The engine displaced 5883 cc with a 102.1 mm bore and 119.9 mm stroke. It is an all-iron engine with forged steel connecting rods, an assembled camshaft, and a cast aluminum intake manifold. The engine is produced in Columbus, Indiana.
In 2001, an optional high output (HO) version of the ISB was introduced, producing 245 hp (183 kW) at 2700 rpm and 505 ft·lbf (686 Nm) from 1600 rpm to 2700 rpm when paired with a heavy duty six-speed transmission, the NV5600. The ISB from previous years remained available, and automatic-equipped engines were now rated the same as manuals.
For the 2003 model year, the ISB was introduced with Bosch high pressure common rail fuel injection and increasing power output. Midway through the 2004 model year, the Cummins 600 was introduced, producing 325 hp (242 kW) at 2900 rpm and 600 ft·lbf (813 Nm)at 1600 rpm. This high torque output gives the engine its name, and also offers a high specific output of 102 ft·lbf (138 Nm) per liter of displacement.
The EPA 2007 ISB comes standard with a variable geometry turbocharger and active particulate filter. To further reduce nitrogen oxide (NOx) levels to EPA 2010 standards, it will use selective catalytic reduction (SCR). The 2010 engine is known as the ISB6.7, with EPA 2010 certification awarded on January 8, 2010.
The ISB, meets Euro 4 and 5 through SCR as well.
Models
The following models are used in buses.
| Model | Max. Power | Max. revs | Max. Torque | Emmissions Certifications |
|---|---|---|---|---|
| ISB 185 | 185 hp | 2600 rpm | 420 lb-ft @ 1600 rpm | EPA 2004 |
| ISB 200 | 200 hp | 2600 rpm | 465 lb-ft @ 1600 rpm | EPA 2004 |
| ISB 200 | 200 hp | 2500 rpm | 520 lb-ft @ 1600 rpm | EPA 2004 |
| ISB 200 | 200 hp | 2600 rpm | 520 lb-ft @ 1600 rpm | EPA 2007, EPA 2010 |
| ISB 215 | 215 hp | 2500 rpm | 520 lb-ft @ 1600 rpm | EPA 2004 |
| ISB 220 | 220 hp | 2600 rpm | 520 lb-ft @ 1600 rpm | EPA 2007, EPA 2010 |
| ISB 230 | 230 hp | 2500 rpm | 520 lb-ft @ 1600 rpm | EPA 2004 |
| ISB 240 | 240 hp | 2600 rpm | 550 lb-ft @ 1600 rpm | EPA 2007, EPA 2010 |
| ISB 240 | 240 hp | 2600 rpm | 560 lb-ft @ 1600 rpm | EPA 2007, EPA 2010 |
| ISB 245 | 245 hp | 2500 rpm | 660 lb-ft @ 1600 rpm | EPA 2004 |
| ISB 260 | 260 hp | 2600 rpm | 550 lb-ft @ 1600 rpm | EPA 2004 |
| ISB 260 (HEV) | 260 hp | 2500 rpm | 660 lb-ft @ 1600 rpm | EPA 2004 |
| ISB 260 | 260 hp | 2600 rpm | 620 lb-ft @ 1600 rpm | EPA 2007, EPA 2010 |
| ISB 260 H | 260 hp | 2600 rpm | 620 lb-ft @ 1900 rpm | EPA 2007, EPA 2010 |
| ISB 275 | 275 hp | 2600 rpm | 660 lb-ft @ 1600 rpm | EPA 2004 |
| ISB 280 | 200 hp | 2600 rpm | 660 lb-ft @ 1600 rpm | EPA 2007, EPA 2010 |
| ISBe | 135-185 hp | 2500 rpm | 650 Nm | Euro 3 |
| ISBe | 140-207 hp | 2500 rpm | 800 Nm | Euro 4 |
| ISBe | 140-207 hp | 2500 rpm | 800 Nm | Euro 5 |
| ISBe | 250-300 hp | 2500 rpm | 1100 Nm | Euro 2 |
| ISBe | 285-275 hp | 2500 rpm | 950 Nm | Euro 3 |
| ISBe | 205-300 hp | 2500 rpm | 1100 Nm | Euro 4 |
| ISBe | 205-300 hp | 2500 rpm | 1100 Nm | Euro 5 |
References
- Cummins ISB EPA 2004, everytime.cummins.com, retrieved on 2009-06-04
- Cummins ISB EPA 2007, everytime.cummins.com, retrieved on 2009-06-04
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