Cummins B series
| Cummins engine | |
|---|---|
 5.9 liter engine, valve cover removed |
|
| Cummins B-series, type 6BT | |
| Production period: | since 1984 |
| Manufacturer: | Cummins engine |
| Working principle: | diesel |
| Motor design: | Row -6 |
| Valve control: | OHV |
| Displacement: | 5890 cm 3 |
| Mixture preparation: | Mechanical direct injection |
| Engine charging: | turbocharger |
| Power: | 119 kW |
| Max. Torque: | 542 Nm |
| Previous model: | none |
| Successor: | none |
The Cummins B-series engine is an in-line six-cylinder diesel engine manufactured by Cummins Engine since 1984. Since then, the engine has been continuously developed, the displacement has been increased from 5.9 to 6.7 liters. Designed as an industrial engine for use in commercial vehicles, the B-series gained fame through its use in ram pickup trucks from 1989. The B-series was manufactured by Consolidated Diesel Company in North Carolina. With an average mileage of 483,000 km until the first engine overhaul, the B-series is considered to be durable in ram trucks. In the following, the first engine of the B series, the type 6BT, is discussed.
Technology, type 6BT (1984–1991)
The original 6BT engine, built until 1991, is a water-cooled, long-stroke 5.9-liter in-line six-cylinder diesel engine with a gray cast iron engine block . The cylinder bore is 102.11 mm (4.02 inches) and the stroke is 119.89 mm (4.72 inches). The power is transmitted from the pistons to a crankshaft made of forged steel via connecting rods with an I-shaped shaft. The crankshaft drives an underlying camshaft via spur gears , which actuates two hanging valves per cylinder via tappets , push rods and rocker arms . The cast iron cylinder heads are designed as individual cylinder heads , the valve covers can be removed individually. All of the engine's ancillary components are driven by a belt from the engine's crankshaft. The engine has a mechanically controlled distributor injection pump from Bosch for mixture preparation , the fuel is injected directly . The engine's intake manifold is made of aluminum, and the air required for combustion is forced into the combustion chambers by a turbocharger .
Technical specifications
| Parameters | 6BT |
|---|---|
| Engine design | Six-cylinder in-line engine |
| Working principle | Diesel engine |
| Mixture preparation | Mechanical direct injection |
| Charging | 1 × turbocharger |
| Valve control |
OHV valve control , 1 × inlet, 1 × outlet valve |
| Bore × stroke | 102.108 x 119.888 mm |
| Displacement | 5890 cc |
| Nominal power SAE (gross) | 160 bhp (119.31 kW) at 2500 min -1 |
| Torque SAE (gross) | 400 lb-ft (542.33 N · m) at 1700 min -1 |
| Compression ratio | 17: 1 |
Remarks
- ↑ a b The power is given in gross horse power (bhp) and the torque in pound feet and measured according to SAE standards; The alternator, water pump, hydraulic power steering pump and exhaust system were dismantled for the measurement. In the case of a measurement according to DIN, which is common in Germany, the values would be lower.
source
- Curtis Redgap: Cummins 5.9 liter and 6.7 liter inline six-cylinder diesel engines . June 2015