Mercedes-Benz OM617 engine

Last updated
Mercedes-Benz OM617 engine
300SD OM617.jpg
Overview
Manufacturer Daimler-Benz
Production1974–1991
Layout
Configuration Straight-5
Displacement 3.0 L (2,998 cc)
3.0 L (3,005 cc)
Cylinder bore 90.9 mm (3.58 in)
91 mm (3.58 in)
Piston stroke 92.4 mm (3.64 in)
Cylinder block material Cast iron
Cylinder head materialCast iron
Valvetrain Chain driven SOHC 10-valve
Compression ratio 21.0:1
Combustion
Operating principle Diesel
Turbocharger Only on OM 617.950
Fuel system Indirect injection
Management Bosch M or MW pump
Oil system Wet sump
Cooling system Water-cooled
Output
Power output 80–230 PS (59–169 kW; 79–227 hp)
Torque output 168–250 N⋅m (124–184 lb⋅ft)
Chronology
Successor OM602

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.

Contents

OM617 Naturally Aspirated

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

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 October 1982 - 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

Related Research Articles

Mercedes-AMG GmbH, commonly known as AMG, is the high-performance subsidiary of Mercedes-Benz AG. AMG independently hires engineers and contracts with manufacturers to customize Mercedes-Benz AMG vehicles. The company has its headquarters in Affalterbach, Baden-Württemberg, Germany.

<span class="mw-page-title-main">Nissan RB engine</span> Reciprocating internal combustion engine

The RB engine is an oversquare 2.0–3.0 L straight-6 four-stroke gasoline engine from Nissan, originally produced from 1985 to 2004. The RB followed the 1983 VG-series V6 engines to offer a full, modern range in both straight or V layouts. It was added to a new engine family name PLASMA.

<span class="mw-page-title-main">Nissan VG engine</span> Reciprocating internal combustion engine

The VG engine is a family of V6 engines designed and produced by Nissan between 1983 and 2004.

<span class="mw-page-title-main">Mitsubishi Sirius engine</span> Reciprocating internal combustion engine

The Mitsubishi Sirius or 4G6/4D6 engine is the name of one of Mitsubishi Motors' four series of inline-four automobile engines, along with Astron, Orion, and Saturn.

<span class="mw-page-title-main">Nissan L engine</span> Reciprocating internal combustion engine

The Nissan L series of automobile engines was produced from 1966 through 1986 in both inline-four and inline-six configurations ranging from 1.3 L to 2.8 L. It is a two-valves per cylinder SOHC non-crossflow engine, with an iron block and an aluminium head. It was the engine of the Datsun 510, Datsun 240Z sports car, and the Nissan Maxima. These engines are known for their reliability, durability, and parts interchangeability.

<span class="mw-page-title-main">Mercedes-Benz M275 engine</span> Reciprocating internal combustion engine

The Mercedes-Benz M275 engine is a twin-turbocharged and intercooled, all-aluminium, 60° V12 automobile piston engine family used in the 2000s to the 2010s. It is loosely based on the M137 naturally aspirated V12 sold between 1998 and 2002, and retains its SOHC, 3 valves per cylinder, twin-spark ignition layout, but differs with the addition of structural reinforcements to the engine block for improved rigidity which in turn yields greater reliability. The M275 V12 Bi-Turbo engine was modified with the addition of larger turbochargers. Several variations of the M275 V12 Bi-turbo engine have powered many top-of-the-range Mercedes-Benz and Maybach models since 2003.

<span class="mw-page-title-main">Mercedes-Benz M112 engine</span> Reciprocating internal combustion engine

The Mercedes-Benz M112 engine is a gasoline-fueled, 4-stroke, spark-ignition, internal-combustion automobile piston V6 engine family used in the 2000s. Introduced in 1996, it was the first gasoline V6 engine ever built by Mercedes. A short time later the related M113 V8 was introduced.

<span class="mw-page-title-main">Mercedes-Benz W123</span> Executive car produced from November 1975 to January 1986

The Mercedes-Benz W123 is a range of executive cars produced by German manufacturer Mercedes-Benz from November 1975 to January 1986. The W123 models surpassed their predecessor, the Mercedes-Benz W114, as the most successful Mercedes, selling 2.7 million units before production ended in the autumn of 1985 for the saloon/sedan versions and January 1986 for coupés and estates/station wagons.

<span class="mw-page-title-main">Mercedes-Benz M110 engine</span> Reciprocating internal combustion engine

The M110 engine family is a DOHC crossflow cylinder head design with 2 valves per cylinder straight-6 automobile engine made by Mercedes-Benz in the 1970s and 1980s.

<span class="mw-page-title-main">Nissan MR engine</span> Kind of engine made by Nissan

The Renault-Nissan MR engine family consists of straight-four 16-valve all-aluminium and water cooled automobile engines with variable valve timing co-developed by Renault and Nissan. Renault calls it the M engine. Other noteworthy features of this engine family include acoustically equal runner lengths and a tumble control valve for the intake manifold, a "silent" timing chain, mirror finished crankshaft and camshaft journals, and offset cylinder placement in an attempt for increased efficiency.

<span class="mw-page-title-main">Nissan HR engine</span> Reciprocating internal combustion engine

The HR is a family of straight-3 12-valve and straight-4 16-valve automobile engines with continuously variable valve timing, involving development by Nissan and/or Renault, and also Mercedes-Benz in the case of the H5Ht/M282. The designation of H engine is used by Renault, and M28x by Mercedes-Benz, to classify the family. There are three basic specifications of engine involving variations in engine architecture, or all-new architecture, with 72.2 mm (2.84 in), 75.5 mm (2.97 in) and 78 mm (3.07 in) bore diameter.

<span class="mw-page-title-main">Mercedes-Benz M137 engine</span> Reciprocating internal combustion engine

The Mercedes-Benz M137 engine is a naturally aspirated, SOHC 60° V12 engine, with three valves per cylinder, 2 intake and 1 exhaust. It was built to replace the larger and heavier, yet more powerful, DOHC, four valves per cylinder, naturally aspirated, 6.0 L M120 V12 unit. The M137 was used briefly between 1998 and 2002 for the W220 S-Class and C215 CL-Class. The architecture is similar to M112 and M113 engines, and is designed to match the overall dimensions of a V8 unit with undersquare internal measurements. The crankcase was cast in a lightweight alloy with "Silitec" (silicon/aluminium) cylinder liners to save weight. The M137 is 80 kg lighter than its predecessor and features cylinder deactivation technology. Both displacement variants have 10:1 compression ratio.

<span class="mw-page-title-main">Mercedes-Benz OM603 engine</span> Reciprocating internal combustion engine

The OM603 engine was a straight-6 Diesel automobile engine from Mercedes-Benz used from 1984 through 1999. The 603 saw limited use in the W124, W126 and W140 model vehicles.

<span class="mw-page-title-main">Mercedes-Benz M111 engine</span> Reciprocating internal combustion engine

The M111 engine family is a straight-4 automobile engine from Mercedes-Benz, produced from 1992 to 2003. Debuted in the 1992 Mercedes-Benz E-Class (W124), this engine family is relatively oversquare and uses 4 valves per cylinder. All engines in the family use a cast iron engine block and aluminum alloy cylinder head.

<span class="mw-page-title-main">Mercedes-Benz M276 engine</span> Reciprocating internal combustion engine

The Mercedes–Benz M276 engine is a direct injected, gasoline automotive piston V6 engine.

<span class="mw-page-title-main">Mercedes-Benz C-Class (W202)</span> Car model

Mercedes-Benz W202 is the internal designation for a compact sedan/saloon manufactured and marketed by Mercedes-Benz between 1992–2001, as the first generation of the C-Class, now in its fifth generation. Replacing the 190 series/W201 in June 1993, the C-Class sedan was Mercedes' entry-level model until 1997, when the company launched the A-Class. Production reached 1,847,382 over model years 1994–2000.

<span class="mw-page-title-main">Subaru FA engine</span> Reciprocating internal combustion engine

The Subaru FA engine is a gasoline boxer-4 engine used in Subaru and Toyota automobiles. It is a derivative of the FB engine, with efforts to reduce weight while maintaining durability as the main design goals. Although the FA and FB engines share a common platform, the FA shares very little in dedicated parts with the FB engine, with a different block, head, connecting rods, and pistons.

<span class="mw-page-title-main">Mercedes-Benz M176/M177/M178 engine</span> Reciprocating internal combustion engine

The M176/M177/M178 is a petrol V8 engine range designed by Mercedes-AMG, replacing the M278 and M157 engines, and is based on the M133 engine.

<span class="mw-page-title-main">Mercedes-Benz C-Class (W206)</span> Motor vehicle

The Mercedes-Benz C-Class (W206) is the fifth generation of the Mercedes-Benz C-Class which is produced by Mercedes-Benz Group AG since 2021. It replaces the W205 C-Class which has been produced since 2014. The fifth-generation C-Class is available in sedan (W206), station wagon/estate (S206), and long-wheelbase sedan (V206) body styles. The W206 C-Class is based on the Mercedes MRA II rear-wheel drive modular platform also used by the W223 S-Class.

References

  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. 1 2 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. 1 2 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.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.