Mercedes-Benz M23 engine

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Mercedes-Benz M23
Overview
Manufacturer Mercedes-Benz
Production1933-1936
Layout
Configuration Inline-4
Displacement 1.3–1.7  L (79–104  cu in)
Cylinder bore 70–72  mm (2.8–2.8  in)
Piston stroke 85–92  mm (3.3–3.6  in)
Valvetrain 16-valve, DOHC, two-valves per cylinder
Compression ratio 6.0:1 [1]
Combustion
Fuel system Carburetor
Fuel type Gasoline
Oil system Dry sump
Output
Power output 25–55  hp (19–41  kW)
Torque output 74  lb⋅ft (100  N⋅m)

The Mercedes-Benz M23 engine is a naturally-aspirated, 1.3-liter, inline-4 gasoline engine, designed, developed and produced by Mercedes-Benz; between 1933 and 1936. [2] [3] [4] [5] [6] [7] [8] [9]

Contents

Development and prototype engines (W17/W25D)

At the beginning of the 1930s, there were attempts to move car engines from the forward compartment to the rear of the car. Such a move allows a reduction in the volume of the front compartment. At the same time, the voluminous rear provides a lot of space above and behind the rear axle. Moreover, when engines are rear-mounted, the drive shaft is eliminated.

In 1930, Daimler-Benz entrusted Hans Nibel with the development of a small rear-engined car, starting from the same principles. In 1931, working with Max Wagner, the type W17 or 120(H) was created, a two-door, equipped with a four-cylinder boxer engine in the rear with a displacement of 1200 cc and a power of 25 hp (18.4 kW). There were also attempts with transverse four-cylinder inline engines. In 1932/1933 Mercedes built a prototype with a front similar to the later VW Beetle, and a longer tail. [10]

Mercedes-Benz 130 (W23) engine

Created in 1931 by Nibel, it had the 1.3 liter sidevalve [11] four-cylinder engine mounted at the back, hence the "H", from German heck (rear), [12] With the fan between the rear coil springs, [13] it drove a transmission with three forward speeds, plus a semi-automatic overdrive which did not require the use of a clutch. [11]

Mercedes-Benz 150 (W30) engine

It was derived in 1935 from the 130, and a more powerful engine. Displacing 1498 cc and a power of 55 PS (40 kW). The engine powered the car to a top speed of 125 km/h.

Created in 1934 by Nibel and chassis engineer Max Wagner. [12] the 150H was a two-seat sports roadster. [12] It featured transverse leaf spring front and coil-sprung swing axle rear suspension. A water-cooled 1,498  cc (91.4  cu in ) OHC four-cylinder engine, producing 55 hp (41 kW), was mounted in back, hence the "H", from German heck (rear). [12] The radiator was behind that, above the transaxle, with a squirrel-cage blower [12] (reminiscent of the VW Type 1) feeding both radiator and carburetor. [12]

The gas tank, which in the case of the Mercedes-Benz 130 was installed over the engine, was transferred to the front compartment.

Mercedes-Benz 170 H (W28) engine

In 1936, in parallel to the classical front-engine Mercedes-Benz 170 V, Daimler-Benz AG introduced the Mercedes-Benz 170 H which had the same engine as the 170 V, with an architecture derived from the one of the 130, its predecessor. The 170 H was powered by a four-cylinder 1697 cc engine with a power of 38 PS (28 kW). The "H" stood for "Heckmotor", or rear engine. [14]

Applications

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The Mercedes-Benz M30 engine is a naturally-aspirated, 1.5-liter, inline-4 gasoline engine, designed, developed and produced by Mercedes-Benz; between 1934 and 1939.

The Mercedes-Benz M21 engine is a naturally-aspirated, 2.0-liter, straight-6, internal combustion piston engine, designed, developed and produced by Mercedes-Benz; between 1933 and 1936.

The Mercedes-Benz M11 engine is a naturally-aspirated, 2.6-liter, straight-6, internal combustion piston engine, designed, developed and produced by Mercedes-Benz; between 1929 and 1935.

The Mercedes-Benz M03 engine is a naturally-aspirated, 3.0-liter, straight-6, internal combustion piston engine, designed, developed and produced by Mercedes-Benz; between 1926 and 1927.

The Mercedes-Benz M02 engine is a naturally-aspirated, 2.0-liter, straight-6, internal combustion piston engine, designed, developed and produced by Mercedes-Benz; between 1926 and 1933.

Hans Nibel was a German mechanical engineer.

References

  1. ↑ "Mercedes-Benz M23 Engine". Sportlich-Leicht.
  2. ↑ Greene, Nik (September 27, 2021). Mercedes-Benz Saloon Coupe: The Complete Story. Crowood Press. ISBN   9781785009341 – via Google Books.
  3. ↑ "Mercedes-Benz M23 Engine". Sportlich-Leicht.
  4. ↑ "MERCEDES BENZ Typ 150 Sport Roadster (W30) specs & photos - 1934, 1935, 1936". autoevolution.
  5. ↑ "Mercedes-Benz 150 Sport Roadster (W 30 series, 1934 - 1936)". marsMediaSite.
  6. ↑ "Mercedes-Benz 150 Sport Saloon (W 30 series, 1934)". marsMediaSite.
  7. ↑ "Mercedes-Benz 170 H (W 28 series, 1936 - 1939)". marsMediaSite.
  8. ↑ "MERCEDES BENZ Typ 170 H (W28) specs & photos - 1936, 1937, 1938, 1939". autoevolution.
  9. ↑ "Mercedes 170 H: The Beetle Before the Beetle". dyler.com.
  10. ↑ "DKW Auto-Union Project: DKW's 1933 Rear Engine Streamliner". April 1, 2017.
  11. 1 2 Setright, L. J. K. "Mercedes-Benz: The German Fountain-head", in Northey, Tom, ed. World of Automobiles (London: Orbis, 1974), Vol. 11, p.1311.
  12. 1 2 3 4 5 6 Lyons, Pete. "10 Best Ahead-of-Their-Time Machines", in Car and Driver, 1/88, p.73.
  13. ↑ Setright, p.1311 photo.
  14. ↑ Osborne, Donald (December 2013). "1936 Mercedes-Benz 170H Saloon". Sports Car Market . 25 (12): 56–57.
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