| Hercules DFXE | |
|---|---|
 The DFXE powered the Diamond T Models 980 and 981 tank transporter | |
| Overview | |
| Manufacturer | Hercules Engine Company |
| Layout | |
| Configuration | Straight-6 |
| Displacement | 895 cu in (14.666 L) |
| Cylinder bore | 5+5⁄8 in (143 mm) |
| Piston stroke | 6 in (152 mm) |
| Compression ratio | 14.8:1 |
| Combustion | |
| Fuel type | Diesel |
| Output | |
| Power output | 201 bhp (150 kW) at 1600 rpm |
| Torque output |
|
The Hercules DFXE was an American diesel truck engine produced by the Hercules Engine Company.
Part of the Hercules DFX series, the DFXE is a naturally aspirated, direct injection,overhead valve, inline six-cylinder engine. [1] [2] The engine had a displacement of 895 cu in (14.666 L), with a bore of 5+5⁄8 in (143 mm), a stroke of 6 in (150 mm) and a compression ratio of 14.8:1. [3] [4] It developed 201 bhp (150 kW) at 1,600 rpm and a maximum 685 ft⋅lbf (929 N⋅m) of torque at 1150 rpm; 660 ft⋅lbf (890 N⋅m) at 1600 rpm. [5] [6]
The DFXE was designed to requirements of the British Purchasing Commission for use in the Diamond T Model 980 tank transporter. As the Diamond T Model 980 was later adopted by the US, the DFXE was one of the few diesel engines used by US tactical trucks during World War II. [7] [8]
The engine was used in upright or horizontal configurations. [9]
It was used in the Diamond T Models 980 and 981 trucks in World War Two, the Le Tourneau Model B29 Tournapull earthmover (introduced in 1945), [10] and the Oliver OC-18 crawler tractor (introduced in 1952), [11] among others.