Daimler Benz
M 189
Manufacturer:	Mercedes Benz
Production period:	1957 to 1967
Style:	Line six-cylinder
Combustion principle:	petrol

The Mercedes-Benz M 189 is based on a series of inline six-cylinder petrol engines that Daimler-Benz produced from 1957 to 1967.

The engine not only replaced its predecessor, the Mercedes-Benz M 186 (the founder of Daimler-Benz 3-liter engines from the 1950s), but also shaped most of the models of the next decade. The M 189 is basically the injection variant of the M 186 and was the longest produced engine in the family. He was in the course of his production time with changes provided, such. B. 1961 by the introduction of a new base alloy of aluminum instead of cast iron.

Properties 

• 6 cylinders in row
• Cylinder head made of aluminum alloy
• Bore and stroke: 85 × 88 mm
• Displacement: 2996 cc
• Single camshaft in the cylinder head
• Two valves per cylinder
• Injection, Bosch, mechanical control
• Crankshaft with seven main bearings

Technical Overview 

Mercedes-AMG
M 133
Manufacturer:	Mercedes Benz
Production period:	since 2013
How it works:	Otto
Style:	Line four-cylinder
Engines:	2.0 liters (1991 cm³)
Successor:	M 139

The M 133 is a petrol engine with four cylinders arranged in series by Mercedes-AMG , which is available since June 2013 in the third generation of the A-Class (W 176) as A 45 AMG on the market. The production takes place by hand at MDC Power GmbH in Kölleda . With a displacement capacity of 140 kW / l, it is the third largest mass-produced four-cylinder engine, which was previously installed in an approved for use on public roads car model factory (motor 4B11T in the Mitsubishi Lancer Evolution X : 150 kW / and 161 kW ).

When M 133 is a four-cylinder - Series - petrol engine with a displacement of 1991 cc. In the original version the power was 265 kW (360 hp) at 6000 rpm (maximum speed: 6700 rpm) and the torque 450 Nm at 2250 to 5000 rpm. Since 2015 the power is 280 kW (381 hp) at 6000 rpm and the maximum torque 475 Nm at 2250 to 5000 rpm.

At best, the engine achieves a specific fuel consumption of 234 g / kWh. The maximum effective mean pressure is over 28 bar. 

The engine is based on the M 270 front-to-rear serial aggregate from which it takes on all the basic structural dimensions, such as bore (83 mm), stroke (92 mm) and cylinder spacing (90 mm), since the aim is to achieve the greatest possible blocking . To achieve the high specific power, however, the engine was adapted for higher ignition pressures of up to 150 bar. The compression ratio is 8.6: 1. 

The in mold Kippgussverfahren prepared crankcase of M 133 is in closed-deck design carried out and consists of the aluminum alloy AlSi7Mg. The cylinder head is made of the aluminum alloy AlSi10MgZr, where the addition of zirconium has increased the thermal conductivity . 

The charge cycle is controlled by four valves per cylinder and two overhead camshafts driven by a timing chain . For both the intake and the exhaust camshaft a camshaft adjustment of 40 ° crank angle is possible. 

The crankshaft drive with a forged steel crankshaft (44MnSiVS6) with inductively hardened bearing surfaces, gray cast iron crankshaft bearing caps and forged pistons made of a racing alloy with friction-optimized piston rings also contribute to a weight- optimizing function. The M 133 weighs 147.8 kg according to the DIN standard. 

The entire air gap from the air inlet to the inlet channels into the cylinders is very short, with a total length of less than 1.2 m, to allow a spontaneous response. The motor is with a twin-scroll - turbocharger equipped, whereby the torque build-up takes place quickly, even at low speed ranges. The maximum boost pressure is 1.8 bar relative to the atmospheric pressure. The intercooler is indirectly via a separate low-temperature cooling circuit, whereby the charge air temperature is a maximum of 25 K above the ambient temperature. 

Injection

The M 133 belongs to the family of BlueDirect direct injection engines with piezo injectors in all four combustion chambers. When the engine is warm, it injects up to three times per cycle (two pre-injections for better mixture preparation), while the engine warms up to five injections per cycle to reduce particulate emissions. The M 270 base engine took over the injector and spark plug position, the inlet duct geometry and the entire combustion chamber roof configuration.

Cooling system 

The cooling system is largely based on the M 159 engine used in the SLS AMG sports car , but has been expanded to include a low-temperature cycle for air-to-water intercooling . There is also an additional radiator in the wheel arch. The water coolers are flown through by an electric pump and the series-connected intercooler. The cooling of the transmission oil is coupled to the engine-side high-temperature cooling circuit, however, the coolant removed therefrom is additionally cooled by a lying, installed in front of the radiator pack auxiliary cooler before it enters the gearbox mounted on the heat exchanger.

The redesign of the cooling system allows water temperatures below 110 ° C to be achieved over the entire map range and under all climatic conditions. Among other things, the delivery rate of the coolant pump was increased by 15%. 

M 133 DE 20 AL

Mercedes Benz
M 115
Manufacturer:	Daimler Benz
Production period:	1968-1985
Style:	Four-cylinder inline engine
displacement:	2.0 liters  2.2 liters  2.3 liters
Previous model:	M 121
Successor:	M 102

The M 115 Daimler -Benz designated a series of four cylinder inline engines .

The Mercedes-Benz 200/220 / 230.4 (W 115 "stroke-eight", to 1976) or 200/230 W 123 (from 1976), the SUV 230 G (W 460, 1979 to 1985), and the Mercedes-Benz vans 408/409 T 2 "Transporter" from 1968 and 208/308 T 1 "Transporter" from 1977 all had petrol engines with displacements of 2.0, 2.2 and 2.3 litres.

The engine is a slightly modified successor to the M 121, with a countercurrent aluminium alloy cylinder head and a five-bearing crankshaft in a cast iron engine block. The overhead camshaft (overhead camshaft) is driven by a roller chain and activated by two valves per cylinder through rocker arms. The M 115 was superseded by the newly developed M 102 with Crossflow cylinder head in the Mercedes 200/230 of the W 123 series in 1980.

Mercedes Benz
M 114
Manufacturer:	Mercedes Benz
Production period:	1967-1972
Style:	Line six-cylinder
Engines:	2.5 liters (2496 cc)
Previous model:	M 108
Successor:	M 110

The M 114 is a gasoline engine with six cylinders in series used by Mercedes-Benz , which was produced from 1967 to 1972 in the Mercedes-Benz Models: 230-280/C/E

M114.920

This version was almost identical to the Mercedes-Benz M 108 , the unit differs by the timing, which allow higher torque at low speeds.

• 6 cylinders in series, cast iron engine block, cylinder head aluminum
• Bore and stroke: 82 mm × 78.8 mm
• Displacement: 2496 cc
• an overhead camshaft
• two valves per cylinder
• two Zenith carburetors Type 35 INAT 
• Compression ratio: 9: 1
• seven crankshaft bearings
• Max. Power: 96 kW (130 hp) at 5400rpm
• Max. Torque: 199 Nm at 3600rpm

Use 

• Mercedes-Benz 250 (W 114) (1968-1972)
• Mercedes-Benz 250 C (W 114) (1969-1972)

M114,980 

This engine is equipped with electronic fuel injection, a Bosch D-Jetronic . The M114 was the first Mercedes-Benz engine to be equipped with this technology after mechanical systems were introduced in the 1950s.

Electronic injection Bosch D-Jetronic; Compression ratio: 9.5: 1; Maximum power: 110 kW (150 hp) at 5500rpm Maximum torque: 211 Nm at 4500rpm

Used: Mercedes-Benz 250 CE (W 114) (1969-1972)