Mercedes-Benz M950F

Wankelmotor fra slutten av 60tallet.

Daimler-Benz
Damler-Benz M950F
1969 - 1970
Bensin
Motor	M950F
Variant	Wankel
Vekt tørr	Kg
Byggeår	1969 - 1970
Ytelse	350 Hk @ 7000 o/min
Dreiemoment	Nm @ o/min
Innsprøytning
Sylindre	3/4 Rotor
Slagvolum	600 ccm pr rotor
Borring	mm
Slag	mm
Kompresjon
Turbo	Kompressor
Ladeluftkjøler	Nei
Kjøling	Vann
Dieselpumpe	-
Dysespiss	-
Dieselfilter	-
Oljefilter	-
Stempelhastighet	- m/s
Stempelprodusent	-
Startmotor	-

Mercedes-Benz M 950 er en prototype Wankel-motor. Den ble først beskrevet i Wolf-Dieter Bensingers essay "Der heutige Entwicklungsstand des Wankelmotors" fra 1969, publisert i januar 1970.

Motoren ble utviklet av Daimler-Benz sin Wankel-motoravdeling, ledet av Bensinger. Rundt 100 enheter ble bygget, hvorav noen 3- og 4-rotorenheter ble installert i Mercedes-Benz C 111 eksperimentelle sportsbil, fra 1969 til 1970, som en midtmotor.

Selv om M 950 var planlagt for kommersiell introduksjon i 1970 som en 2-rotormotor, hadde ikke M 950 nådd serieproduksjonsstadiet i 1972.

Daimler-Benz utviklet deretter en etterfølger til M 950, M 951, men Daimler-Benz sin Wankel-motorutvikling ble forlatt i 1976.

Engine type M 950 F

Number of cylinders / arrangement three-rotor Wankel engine

Total displacement chamber volume 3 x 600 cc

Compression ratio 9.3

Rated output 280 hp / 206 kW at 7000 rpm

Rated torque 294Nm at 4000 - 5500 rpm

Fuel system direct injection, mechanically controlled; Bosch 3-plunger injection pump

Cooling water cooling / pump; radiator in the car's front

Lubrication pressure circulation lubrication

Electric system 12 V

Generator three-phase AC

Starter electrical

Ignition transistor ignition

Fuel tank: position / capacity in the lateral frame side rails / 2 x 60 litre

Fuel supply piston pump as part of the injection pump

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The extremely rare (12 total built) Mercedes-Benz M950F was a normally aspirated Wankel engine mounted in experimental Mercedes-Benz C111 vehicles, built in 1969-70. There were two versions: 3-rotor engine (600 cc each) with power output of 280 hp at 7000/min, and a later version 4-rotor engine (600 cc each) with power output of 350 hp at 7000/min.

The experimental Mercedes-Benz C111 containing the (code named M950F) engine was shown to the public at the 1969 Frankfurt International Motor Show.

This was a totally experimental car from Daimler-Benz, and they gave up on the rotary due mainly to poor fuel consumption.

C 111 Specifications (First Version) Combustion principle Wankel Configuration in front of rear axle (mid engine) Engine type M 950 F Number of cylinders / arrangement three-rotor Wankel engine Total displacement chamber volume 3 x 600 cc Compression ratio 9.3 Rated output 280 hp / 206 kW at 7000 rpm Rated torque 294Nm at 4000 - 5500 rpm Fuel system direct injection, mechanically controlled; Bosch 3-plunger injection pump Cooling water cooling / pump; radiator in the car's front Lubrication pressure circulation lubrication Electric system 12 V Generator three-phase AC Starter electrical Ignition transistor ignition Fuel tank: position / capacity in the lateral frame side rails / 2 x 60 litre Fuel supply piston pump as part of the injection pump Gearing 5-speed manual transmission ZF 5 DS-25/1 Shifting central floor gear shift lever Clutch dry single-disc clutch Synchromesh gears I - V Final drive ratio 3.166 Maximum speed 260 km/h Acceleration 0-100 km/h 5 sec (2 occupants)

C 111 Specifications (Second Version) Combustion principle Wankel Configuration in front of rear axle (mid engine) Engine type M 950 F Number of cylinders / arrangement four-rotor Wankel engine Total displacement chamber volume 4 x 600 cc Compression ratio 9.3 Rated output 350 hp / 257 kW at 7000 rpm Rated torque 392Nm at 4000 - 5500 rpm Fuel system direct injection, mechanically controlled; Bosch 4-plunger injection pump Cooling water cooling / pump; radiator in the car's front Lubrication pressure circulation lubrication Electric system 12 V Generator three-phase AC Starter electrical Ignition transistor ignition Fuel tank: position / capacity in the lateral frame side rails / 2 x 60 litre Fuel supply piston pump as part of the injection pump Gearing 5-speed manual transmission ZF 5 DS-25/1 Shifting central floor gear shift lever Clutch dry double-disc clutch Syncromesh gears I - V Final drive ratio 2.975 Maximum speed 300 km/h Acceleration 0-100 km/h 4.8 secs (2 occupants)

Technical specifications

Technical specifications

	3-rotor engine (M 950 F)	4-rotor engine (M 950/4)
Eccentricity <math>e</math>	15 mm
Generating radius <math>R</math>	99 mm
Equidistant <math>a</math>	4 mm
Width <math>B</math>	75 mm
Chamber volume <math>V_k</math>	600 cm3
Displacement <math>V_h</math>	3600 cm3	4800 cm3
Compression <math>\varepsilon</math>	9.3
Rated power <math>P_e</math>	205 kW	260 kW
Rated speed <math>n_e</math>	7,000 min−1	6,000 min−1
BMEP <math>p_e</math>	1.05 MPa	1.1 MPa
Mass <math>m</math>	150 kg	180 kg
Source

Power diagram of the M 950/4