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BMW M44

FieldValue
nameBMW M44 engine
imageBMW 1998 318ti engine bay.jpg
production1996–2000
configurationInline-4
headAluminium
blockCast iron
valvetrainDOHC
fueltypePetrol
displacement1895 cc
bore85 mm
stroke83.5 mm
predecessorBMW M42
successorBMW N42

The BMW M44 is a DOHC four-cylinder petrol engine which replaced the BMW M42 and was produced from 1996 to 2000 at the Steyr factory. It was produced alongside the BMW M43 SOHC four-cylinder engine, with the M44 being the higher performance engine. In 2000, the M44 was replaced by the BMW N42 engine.

Design

Compared with the M42, the M44 has roller rocker arms, a hot-wire MAF, displacement increased from 1.8 to and other detail changes such as a grey cast iron crankshaft replacing the forged steel item from the previous M42. As per the final versions of the M42, the M44 has a dual length intake manifold ("DISA"). Peak power is the same as the M42, however mid-range power is increased significantly and peak torque is increased by 5 Nm at 200 rpm lower. There was also a 70% reduction in valve train friction which contributed to the engine being more quiet and fuel efficient than its predecessor.

The M44 has a cast iron block and aluminium cylinder head, as per its predecessor.

Versions

VersionDisplacementPowerTorqueYears
M44B191895 cc103 kW
at 6,000 rpm180 Nm
at 4,300 rpm1996–2000

M44B19

The M44B19 has a displacement of 1895 cc, which is achieved through a bore of 85.0 mm and a stroke of 83.5 mm. A compression ratio of 10.0:1 is used, along with the Bosch Motronic 5.2 engine management system.

The crankshaft has an increased stroke from the M42's 81 mm and is cast instead of forged. Also revised were the valve actuators which are of a roller pivoting arm type.

Applications:

  • 1996-2000 E36 318i (North America only), 318is and 318ti
  • 1996-1999 Z3 1.9

With time this engine was replaced by BMW N42 engine.

References

References

  1. "BMW M44B19 automotive engine". bmw-grouparchiv.de.
  2. (11 December 2008). "M42 vs M44".
  3. "Whats a quick way to tell a M44 engine from a M42 engine?".
  4. "BMW M42 and M44 Four Cylinder Engines".
  5. "Japanese BMW M44 engine document".
  6. "BMW M44 Engine Technical Information (1996)".
  7. "BMW M44 engine".
  8. "BMW Heaven Specification Database | Engine specifications for M44 engines".
  9. "Motronic 5.2 (M44)".
  10. "BMW M44 Engine Technical Information (1996)".
  11. "Whats the difference between M44 and M42?".
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

bmw-engines straight-four-engines gasoline-engines-by-model
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