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Mercedes-Benz OM617 engine

January 01, 1970

The OM617 engine family is a straight-5 diesel automobile engine from Mercedes-Benz used in the 1970s and 1980s. It is a direct development from the straight-4 OM616. It was sold in vehicles from 1974 to 1991. The OM617 is considered to be one of the most reliable engines ever produced with engines often reaching over 1,000,000 km (620,000 mi) without being rebuilt and is one of the key reasons for Mercedes' popularity in North America in the 1980s, as it was powerful and reliable compared to other automotive diesels of the time. It is also a very popular choice for the use of alternative fuels, mainly straight or waste vegetable oil and biodiesel, although the use of these fuels may cause engine damage over time if not processed properly before use.

Mercedes-Benz OM617 engine
Overview
ManufacturerDaimler-Benz
Production1974–1991
Layout
ConfigurationStraight-5
Displacement3.0 L (2,998 cc)
3.0 L (3,005 cc)
Cylinder bore90.9 mm (3.58 in)
91 mm (3.58 in)
Piston stroke92.4 mm (3.64 in)
Cylinder block materialCast iron
Cylinder head materialCast iron
ValvetrainChain driven SOHC 10-valve
Compression ratio21.0:1
Combustion
Operating principleDiesel
TurbochargerOnly on OM 617.950
Fuel systemIndirect injection
ManagementBosch M or MW pump
Oil systemWet sump
Cooling systemWater-cooled
Output
Power output80–230 PS (59–169 kW; 79–227 hp)
Torque output168–250 N⋅m (124–184 lb⋅ft)
Chronology
SuccessorOM602

OM617 Naturally Aspirated edit

Essentially an OM616 with an extra cylinder, it debuted in 1974 with the W115(240 3.0d) chassis. Bore and stroke was 91 mm × 92.4 mm (3.58 in × 3.64 in). It was originally 80 PS (59 kW; 79 hp). Bosch MW inline injection pumps were used, which had flyweight governors and vacuum shutoff. Previous engines had used pneumatic governors, and "gorilla knob" to start and shut off the engine. The North American engines had ADA device equipped pumps which limited fuel at high altitudes to prevent smoking with less dense air. New engine blocks after the .910 had rear mounted oil filter housings, with a combined full flow and bypass filter element. In August 1978 the precombustion chamber was updated to be similar to the new OM617A design for more swirl and more efficient combustion. The engine capacity was lowered to 3.0 L (2,998 cc) to satisfy engine displacement tax laws in Europe by changing the bore to 90.9 mm (3.58 in). September 1979 saw a new camshaft with greater valve lift let air and exhaust gases have less resistance. Power output rose to 88 PS (65 kW; 87 hp). Torque remained at 172 N⋅m (127 lb⋅ft) @ 2400 rpm.[1] In November 1980 the MW style injection pump was replaced with the M type for non-North American engines. Engines were equipped with series wired loop type glow plugs up until 1980 when replaced by the much more reliable pencil type plugs (these had been already used in the OM617A since 1978). Vehicles sold to the North American market had exhaust gas recirculation equipment fitted.

OM617.910

Canister style oil filter at bottom front of engine. Power output was 80 PS (59 kW; 79 hp) @ 4000 rpm and torque was 172 N⋅m (127 lb⋅ft) @ 2400 rpm.[2]

Applications:

OM617.912

This was introduced with the W123 series. Power originally was 80 PS (59 kW; 79 hp) @ 4000 rpm, torque 172 N⋅m (127 lb⋅ft) @ 2400 rpm. From September 1979 - 88 PS (65 kW; 87 hp) @ 4400 rpm, torque 172 N⋅m (127 lb⋅ft) @ 2400 rpm.

Applications:

OM617.913

This was an adaption of the .912 to the T1 chassis. It had a downward facing oil filter housing.

OM617.931 and OM617.932

This engine was adapted from the .912 to fit the G Class,[3] main difference being oil pan changes.

Applications:

OM617A Turbocharged edit

The year 1976 saw the engine adapted to use a turbocharger. This 190 PS (140 kW; 187 hp) OM617LA was fitted to the C111-IID test vehicle, and set 16 world land speed and endurance records at the Nardo test facility in Italy. In 1978 the engine was upgraded again to 230 PS (169 kW; 227 hp) and installed in the C111-IIID and broke 9 further records.[4] Modifications for production engines included oil jets to cool the underside of the pistons; pistons with oil passages; stronger connecting rods; sodium filled valve stems and a stronger nitride-hardened crankshaft. Also an uprated oil pump with separate chain drive was fitted as the turbocharger lubrication required higher flow. Bosch MW injection pumps were calibrated for greater fuel output and fitted with an ALDA device which prevented overfueling until the turbocharger had begun to provide boost pressure. Pencil glow plugs were provided on all OM617A engines.

The series-production turbocharged OM 617 A was fitted with a fixed-turbine-geometry wastegate turbocharger developed by Garret. It has a compressor efficiency of <74 per cent and a pressure ratio of ca. 3.0, delivering a corrected airflow of up to 200 g·s−1. Its maximum turbine speed is 2550 s−1,[5] and it delivers a boost pressure of up to 170 kPa.[6] Daimler-Benz did not equip the OM 617 A with an intercooler. Still, the turbocharger improves the engine's thermal efficiency, resulting in a BSFC of 245 g/(kW·h), an improvement of ca. 20 g over the naturally aspirated version.[7] The original performance figures for the 2998 cm3 unit were 85 kW at 4200/min[8] and a BMEP of 1.0 MPa,[6] equivalent to a maximum torque of ca. 235 N·m at 2400/min.[8]

OM617.950

In 1978, the OM617.950 was used in the Mercedes-Benz W116 to produce the North American market-only 300SD, the world's first production turbodiesel sedan. These engines pre-dated tighter emissions laws, so did not have exhaust gas recirculation (EGR). Power originally was 111 PS (82 kW; 109 hp) @ 4200 rpm, torque 228 N⋅m (168 lb⋅ft) @ 2400 rpm. From October 1979 - 121 PS (89 kW; 119 hp) @ 4350 rpm, torque 230 N⋅m (170 lb⋅ft) @ 2400 rpm.[9]

Applications:

OM617.951

The .951 was introduced for 1981 and displaced 3.0 L (2,998 cc), using a 90.9 mm × 92.4 mm (3.58 in × 3.64 in) bore and stroke. Power originally was 121 PS (89 kW; 119 hp) @ 4350 rpm, torque 230 N⋅m (170 lb⋅ft) @ 2400 rpm. From August 1984 - 125 PS (92 kW; 123 hp) @ 4350 rpm, torque 250 N⋅m (184 lb⋅ft) @ 2400 rpm.[10] Vehicles sold to the North American market had EGR equipment fitted.

Applications:

OM617.952

The .952 is identical to the .951 apart from minor changes to fit the North American 123 chassis. It was also fitted to the European market W123 wagon, the 300TD. This was the only turbocharged OM617 fitted to a European W123. Power originally was 121 PS (89 kW; 119 hp) @ 4350 rpm, torque 230 N⋅m (170 lb⋅ft) @ 2400 rpm. From October 1982 - 125 PS (92 kW; 123 hp) @ 4350 rpm, torque 250 N⋅m (184 lb⋅ft) @ 2400 rpm.[11] Vehicles sold to the North American market had EGR equipment fitted.

Applications:

See also edit

References edit

  1. ^ "Mercedes-Benz W123 300D Archive". mercedes-benz-publicarchive.com.
  2. ^ "Mercedes-Benz W115 240D 3.0 Archive". mercedes-benz-publicarchive.com.
  3. ^ "Mercedes-Benz W460 300GD Archive". mercedes-benz-publicarchive.com.
  4. ^ "Mercedes-Benz C 111 History". mercedes-benz.com.
  5. ^ Obländer, Kurt; Fortnagel, Manfred; Feucht, Hans-Juergen; Conrad, Ulrich (1978). The Turbocharged Five-Cylinder Diesel Engine for the Mercedes-Benz 300 SD. p. 20. doi:10.4271/780633.
  6. ^ a b Obländer, Kurt; Fortnagel, Manfred; Feucht, Hans-Juergen; Conrad, Ulrich (1978). The Turbocharged Five-Cylinder Diesel Engine for the Mercedes-Benz 300 SD. p. 24. doi:10.4271/780633.
  7. ^ Obländer, Kurt; Fortnagel, Manfred; Feucht, Hans-Juergen; Conrad, Ulrich (1978). The Turbocharged Five-Cylinder Diesel Engine for the Mercedes-Benz 300 SD. p. 25. doi:10.4271/780633.
  8. ^ a b Obländer, Kurt; Fortnagel, Manfred; Feucht, Hans-Juergen; Conrad, Ulrich (1978). The Turbocharged Five-Cylinder Diesel Engine for the Mercedes-Benz 300 SD. p. 3. doi:10.4271/780633.
  9. ^ "Mercedes-Benz W116 300SD Archive". mercedes-benz-publicarchive.com.
  10. ^ "Mercedes-Benz W126 300SD Archive". mercedes-benz-publicarchive.com.
  11. ^ "Mercedes-Benz W123 300D Turbo Archive". mercedes-benz-publicarchive.com.

January 01, 1970
mercedes, benz, om617, engine, this, article, multiple, issues, please, help, improve, discuss, these, issues, talk, page, learn, when, remove, these, template, messages, this, article, possibly, contains, original, research, please, improve, verifying, claims. This article has multiple issues Please help improve it or discuss these issues on the talk page Learn how and when to remove these template messages This article possibly contains original research Please improve it by verifying the claims made and adding inline citations Statements consisting only of original research should be removed February 2019 Learn how and when to remove this message This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Mercedes Benz OM617 engine news newspapers books scholar JSTOR February 2019 Learn how and when to remove this message Learn how and when to remove this message The OM617 engine family is a straight 5 diesel automobile engine from Mercedes Benz used in the 1970s and 1980s It is a direct development from the straight 4 OM616 It was sold in vehicles from 1974 to 1991 The OM617 is considered to be one of the most reliable engines ever produced with engines often reaching over 1 000 000 km 620 000 mi without being rebuilt and is one of the key reasons for Mercedes popularity in North America in the 1980s as it was powerful and reliable compared to other automotive diesels of the time It is also a very popular choice for the use of alternative fuels mainly straight or waste vegetable oil and biodiesel although the use of these fuels may cause engine damage over time if not processed properly before use Mercedes Benz OM617 engineOverviewManufacturerDaimler BenzProduction1974 1991LayoutConfigurationStraight 5Displacement3 0 L 2 998 cc 3 0 L 3 005 cc Cylinder bore90 9 mm 3 58 in 91 mm 3 58 in Piston stroke92 4 mm 3 64 in Cylinder block materialCast ironCylinder head materialCast ironValvetrainChain driven SOHC 10 valveCompression ratio21 0 1CombustionOperating principleDieselTurbochargerOnly on OM 617 950Fuel systemIndirect injectionManagementBosch M or MW pumpOil systemWet sumpCooling systemWater cooledOutputPower output80 230 PS 59 169 kW 79 227 hp Torque output168 250 N m 124 184 lb ft ChronologySuccessorOM602 Contents 1 OM617 Naturally Aspirated 2 OM617A Turbocharged 3 See also 4 ReferencesOM617 Naturally Aspirated editEssentially an OM616 with an extra cylinder it debuted in 1974 with the W115 240 3 0d chassis Bore and stroke was 91 mm 92 4 mm 3 58 in 3 64 in It was originally 80 PS 59 kW 79 hp Bosch MW inline injection pumps were used which had flyweight governors and vacuum shutoff Previous engines had used pneumatic governors and gorilla knob to start and shut off the engine The North American engines had ADA device equipped pumps which limited fuel at high altitudes to prevent smoking with less dense air New engine blocks after the 910 had rear mounted oil filter housings with a combined full flow and bypass filter element In August 1978 the precombustion chamber was updated to be similar to the new OM617A design for more swirl and more efficient combustion The engine capacity was lowered to 3 0 L 2 998 cc to satisfy engine displacement tax laws in Europe by changing the bore to 90 9 mm 3 58 in September 1979 saw a new camshaft with greater valve lift let air and exhaust gases have less resistance Power output rose to 88 PS 65 kW 87 hp Torque remained at 172 N m 127 lb ft 2400 rpm 1 In November 1980 the MW style injection pump was replaced with the M type for non North American engines Engines were equipped with series wired loop type glow plugs up until 1980 when replaced by the much more reliable pencil type plugs these had been already used in the OM617A since 1978 Vehicles sold to the North American market had exhaust gas recirculation equipment fitted OM617 910Canister style oil filter at bottom front of engine Power output was 80 PS 59 kW 79 hp 4000 rpm and torque was 172 N m 127 lb ft 2400 rpm 2 Applications 1974 1976 240D 3 0 300D OM617 912This was introduced with the W123 series Power originally was 80 PS 59 kW 79 hp 4000 rpm torque 172 N m 127 lb ft 2400 rpm From September 1979 88 PS 65 kW 87 hp 4400 rpm torque 172 N m 127 lb ft 2400 rpm Applications 1977 1985 300D 1977 1981 300D North American 1977 1985 300D Long 1977 1981 300CD North American 1978 1985 300TD OM617 913This was an adaption of the 912 to the T1 chassis It had a downward facing oil filter housing 1982 1988 209 D 309 D 409 D OM617 931 and OM617 932This engine was adapted from the 912 to fit the G Class 3 main difference being oil pan changes Applications 1979 1991 W460 W461OM617A Turbocharged editThe year 1976 saw the engine adapted to use a turbocharger This 190 PS 140 kW 187 hp OM617LA was fitted to the C111 IID test vehicle and set 16 world land speed and endurance records at the Nardo test facility in Italy In 1978 the engine was upgraded again to 230 PS 169 kW 227 hp and installed in the C111 IIID and broke 9 further records 4 Modifications for production engines included oil jets to cool the underside of the pistons pistons with oil passages stronger connecting rods sodium filled valve stems and a stronger nitride hardened crankshaft Also an uprated oil pump with separate chain drive was fitted as the turbocharger lubrication required higher flow Bosch MW injection pumps were calibrated for greater fuel output and fitted with an ALDA device which prevented overfueling until the turbocharger had begun to provide boost pressure Pencil glow plugs were provided on all OM617A engines The series production turbocharged OM 617 A was fitted with a fixed turbine geometry wastegate turbocharger developed by Garret It has a compressor efficiency of lt 74 per cent and a pressure ratio of ca 3 0 delivering a corrected airflow of up to 200 g s 1 Its maximum turbine speed is 2550 s 1 5 and it delivers a boost pressure of up to 170 kPa 6 Daimler Benz did not equip the OM 617 A with an intercooler Still the turbocharger improves the engine s thermal efficiency resulting in a BSFC of 245 g kW h an improvement of ca 20 g over the naturally aspirated version 7 The original performance figures for the 2998 cm3 unit were 85 kW at 4200 min 8 and a BMEP of 1 0 MPa 6 equivalent to a maximum torque of ca 235 N m at 2400 min 8 OM617 950In 1978 the OM617 950 was used in the Mercedes Benz W116 to produce the North American market only 300SD the world s first production turbodiesel sedan These engines pre dated tighter emissions laws so did not have exhaust gas recirculation EGR Power originally was 111 PS 82 kW 109 hp 4200 rpm torque 228 N m 168 lb ft 2400 rpm From October 1979 121 PS 89 kW 119 hp 4350 rpm torque 230 N m 170 lb ft 2400 rpm 9 Applications 1978 1980 300SD Turbo OM617 951The 951 was introduced for 1981 and displaced 3 0 L 2 998 cc using a 90 9 mm 92 4 mm 3 58 in 3 64 in bore and stroke Power originally was 121 PS 89 kW 119 hp 4350 rpm torque 230 N m 170 lb ft 2400 rpm From August 1984 125 PS 92 kW 123 hp 4350 rpm torque 250 N m 184 lb ft 2400 rpm 10 Vehicles sold to the North American market had EGR equipment fitted Applications 1981 1985 300SD Turbo 1981 300TD Turbo OM617 952The 952 is identical to the 951 apart from minor changes to fit the North American 123 chassis It was also fitted to the European market W123 wagon the 300TD This was the only turbocharged OM617 fitted to a European W123 Power originally was 121 PS 89 kW 119 hp 4350 rpm torque 230 N m 170 lb ft 2400 rpm From October 1982 125 PS 92 kW 123 hp 4350 rpm torque 250 N m 184 lb ft 2400 rpm 11 Vehicles sold to the North American market had EGR equipment fitted Applications 1981 1985 300D Turbo North American 1981 1985 300CD Turbo North American 1982 1985 300TD Turbo Military Hagglund Bv206 BandvagnSee also editList of Mercedes Benz enginesReferences edit Mercedes Benz W123 300D Archive mercedes benz publicarchive com Mercedes Benz W115 240D 3 0 Archive mercedes benz publicarchive com Mercedes Benz W460 300GD Archive mercedes benz publicarchive com Mercedes Benz C 111 History mercedes benz com Oblander Kurt Fortnagel Manfred Feucht Hans Juergen Conrad Ulrich 1978 The Turbocharged Five Cylinder Diesel Engine for the Mercedes Benz 300 SD p 20 doi 10 4271 780633 a b Oblander Kurt Fortnagel Manfred Feucht Hans Juergen Conrad Ulrich 1978 The Turbocharged Five Cylinder Diesel Engine for the Mercedes Benz 300 SD p 24 doi 10 4271 780633 Oblander Kurt Fortnagel Manfred Feucht Hans Juergen Conrad Ulrich 1978 The Turbocharged Five Cylinder Diesel Engine for the Mercedes Benz 300 SD p 25 doi 10 4271 780633 a b Oblander Kurt Fortnagel Manfred Feucht Hans Juergen Conrad Ulrich 1978 The Turbocharged Five Cylinder Diesel Engine for the Mercedes Benz 300 SD p 3 doi 10 4271 780633 Mercedes Benz W116 300SD Archive mercedes benz publicarchive com Mercedes Benz W126 300SD Archive mercedes benz publicarchive com Mercedes Benz W123 300D Turbo Archive mercedes benz publicarchive com Retrieved from https en wikipedia org w index php title Mercedes Benz OM617 engine amp oldid 1217930114, wikipedia, wiki, book, books, library,

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