Detroit Diesel Series 50

The Detroit Diesel Series 50 is an 8.5 litre, inline, four cylinder, diesel engine. Introduced in 1993, the Series 50 was built off of the existing block of the Detroit Diesel Series 60. The Series 50 engine was used as a major bus engine in the United States and Canada and was used for trucks, motor homes, and construction and industrial equipment.

The Series 50 engine was fully electronically controlled and used DDECIII and later DDECIV electronics. The overhead cam engine featured electronic unit injectors and was turbocharged and air-to-air intercooled. Being built off the Series 60, it shared the same cylinder kits, bearings, gear train, rocker arms, valves, and pumps.

In response to the EPA 2004 emissions standards, Detroit Diesel announced in March 2000 revisions to the Series 50 for 2000. This included the addition of an exhaust gas recirculation (EGR) system and a variable geometry turbocharger (VGT). These components were controlled by the DDEC IV engine controls. Though the EPA 2004 emissions standard didn't take affect until October 2002, the engine was made available before that time. To further reduce particulate emissions to lower than 2007 levels of 0.01 g/bhp-hr, there is an option to use ultra low sulfur diesel and particulate filter.

In September 2004, Detroit Diesel ceased production of the Series 50 for on highway applications.

Models

Model	Max. Power	Max. revs	Max. Torque	Emmissions Certifications
DD50	250HP	2100 rpm	735 lb-ft @ 1200 rpm	EPA 2004, EPA 2007
DD50	275HP	2100 rpm	890 lb-ft @ 1200 rpm	EPA 2004, EPA 2007
DD50	320HP	2100 rpm	1150 lb-ft @ 1200 rpm	EPA 2004, EPA 2007

References

v·d·e Detroit Diesel Current Products DD13 - DD15 - DD16 Former Products MBE 900 - MBE 4000 - Series 40 - Series 50 - Series 50G (CNG/LNG) - Series 60 - Series 53 - Series 71 - Series 92