GM Medium Diesel engine

Medium diesel engine
Overview
Manufacturer General Motors
Production 2013 (2013)–present
Combustion chamber
Configuration l4
Displacement 1,598 cc (97.5 cu in)
Cylinder bore 79.7 mm (3.14 in)
Piston stroke 80.1 mm (3.15 in)
Cylinder block alloy Aluminium
Cylinder head alloy Aluminium
Valvetrain DOHC
Compression ratio 16:1
Combustion
Fuel system Common rail
Fuel type Diesel
Output
Power output 95 - 160 PS
Torque output 280 - 350 Nm
Chronology
Predecessor Family B/Circle L engine

The Medium Diesel Engine (MDE) is a four-cylinder diesel engine developed by Adam Opel AG and marketed as '1.6 CDTI Ecotec'. Production began in late 2013 at Szentgotthárd, Hungary. It is Opel's first all-aluminum diesel engine that offers power density of 85 hp per liter in its most powerful version with 136 PS. Initially maximum power and torque have been increased versus the 1.7-liter engine, while fuel consumption has been reduced by up to 10 percent compared with similarly powerful 2.0-liter CDTI engine.[1] This new 1.6 CDTI engine will replace the current 1.7-liter and lower-powered 2.0-liter diesel engines in a wide range of Opel models, with more- and less-powerful versions to come. The most powerful version of 1.6 CDTI engine delivering 136 PS (100 kW; 134 hp) at 3,500–4,000 rpm and 320 N·m (236 lbf·ft) at 2,000 rpm was first introduced in 2013 Opel Zafira Tourer[2] and later in 2014 Opel Astra J and restyled 2014 Opel Meriva B. In 2014, new versions emerged: 1.6 CDTI with 110 PS and 95 PS.

The engine displacement is 1.6 L (1,598 cc) and it has bore/stroke ratio of 79.7/80.1 mm with cylinder pressure of 180 bar and compression ratio of 16:1. It uses an aluminum engine block, die-cast aluminum bedplate, and am aluminum cylinder head. A chain-driven dual overhead camshaft valvetrain with dual continuous variable cam phasing, including weight-saving hollow sections and lobes, operates four valves per cylinder with low-friction, hydraulic roller finger followers. The pistons are made from aluminum for reduced reciprocating mass, feature a concave, shallow-bowl profile to facilitate efficient combustion, and are cooled by under-skirt oil spraying. The crankshaft, with four counterweights to minimize mass, and the con-rods are in forged steel. The engine also features improvements to reduce NVH such as a glass-fiber reinforced plastic (GRP) cam cover, fully decoupled from the engine to reduce noise and vibration, while also saving weight compared to aluminum; a composite intake manifold encapsulated in acoustic padding and an external plastic shield, significantly reducing noise emissions; a mechanical crankshaft isolator which reduces radiated noise and torsional vibrations in the accessory drive system; and scissor gears from the crankshaft for the timing drive system incorporating tooth profiles ground with a Low Noise Shifting (LNS) process for optimal noise reduction. More than 150 patented diesel control functions are deployed by the 1.6 CDTI engine's control unit, developed in-house by General Motors. This advanced engine control unit (ECU), jointly engineered in Italy (by GM Powertrain Torino), Germany, and the United States, will be used in all future four-cylinder diesel engines.

Low fuel consumption and Euro 6-standard emissions (effective from September 2015) are also made possible by the use of Opel’s “BlueInjection” selective catalytic reduction (SCR) system, which injects AdBlue® solution (consisting of urea and water) into the exhaust gas. The solution decomposes into ammonia, which is then stored on a catalyst substrate. Nitrogen oxide (NOx) enters the catalyst in the exhaust gas, and is then selectively reduced to nitrogen and water.

Starting in 2013, the engine replaced the turbocharged 1.7 L CDTI, lower-powered 2.0 L CDTI Ecotec with 110 PS and 130 PS engines in Opel cars, and in the near future it will replace the 1.3 CDTI in Corsa, Meriva and Astra.


Bi-turbo version with 160 PS, and 350 Nm (at 1.500 - 2.250 rpm) is used in:

The 136 PS, 320 Nm, version of the engine 1.6 CDTI (code B16DTH) is used in the following Opel vehicles (and their Vauxhall equivalents):

The 120 PS, 320 Nm, version is used in:

The 110 PS, 300 Nm, version is used in:

The 95 PS, 280 Nm, version is used in:

See also

References

  1. ↑ "Vauxhall reveals radical new engine strategy". 2013-04-17. Retrieved 2013-04-17.
  2. ↑ "Vauxhall Zafira Tourer 1.6 diesel". 2013-08-31. Retrieved 2013-08-31.
  3. ↑ "New Opel Astra BiTurbo Hatchback: The Spicy One". 2016-05-11. Retrieved 2016-07-30.

External links

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