Mercedes-Benz M 110
| Mercedes Benz | |
|---|---|
|
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| M 110 | |
| Manufacturer: | Mercedes Benz |
| Production period: | 1972-1989 |
| Design: | Inline six-cylinder |
| Engines: | 2.8 liters (2746 cm³) |
| Previous model: | M 130 / 114 |
| Successor: | M 103 |
The M 110 is a DOHC - series - six-cylinder - petrol engine from Mercedes-Benz , which was built from 1972 to 1989 in car of the brand. It replaced the M 130 with mechanical Bosch injection and is the last development stage of the "basic engine" M 180 , which was presented in 1951 in the 220 model . Except for the modified block, it no longer bears any resemblance to its ancestor.
The main difference lies in the cross-flow cylinder head made of aluminum, two camshafts and hemispherical combustion chambers, which were introduced in order to be able to position themselves better against competitive vehicles such as the BMW 2800 and the Opel Commodore . Because of this and the use of the Bosch D-Jetronic , the M 110 has an output of 18 kW / 25 PS (from 118 kW / 160 to 136 kW / 185 PS) more than its predecessor M 130 with the same displacement.
history
The engine was presented in the small series / 8 or W 114 in April 1972, the new S-Class was available with it from the beginning (September 1972). From August 1974 it was offered in the SL in addition to the V8 engines. In the G-model , the M 110 was the top engine until 1989. When the decision to mass-produce the M 110 was made in 1971, its successor was already in development. This M 103 engine should actually be presented in 1976 with the 123 series . In the event that it would not be ready by then, the board approved the M 110 for the transition period. However, the M 103 was only introduced in 1984 in the 124 series, and so a five-year provisional solution became a standard for 17 Years.
technology
The M 110 engine has an engine block made of gray cast iron and a crankshaft with seven bearings . It is the first series engine from Daimler-Benz with two overhead camshafts. The V-shaped hanging valves are operated by rocker arms.
Together with the eight-cylinder M 116 V-engine in the 350 series (SL, SLC and SE), which was modernized in 1971 , the M 110 engine in its injection version is also the second Mercedes engine generation with electronic injection technology (Bosch D-Jetronic ); the first Mercedes engine with this injection was the 250CE / 8 from 1969. The previously built injection engines at Mercedes are all mechanically controlled. From 1976 the M 110 was built with the mechanical-hydraulic Bosch K-Jetronic .
Due to the lower moving masses and the better mass balance, the M 110 had become more speed-resistant than its predecessors. The noisy aluminum of the cylinder head and the large number of moving parts such as rocker arms and a guide of the duplex timing chain via a pulley result in strange ticking and clacking noises. The M 110 engines are therefore nicknamed the " Schellenbaum engine".
The structure of the engine with oil sump, cylinder block, cylinder head, camshaft case and valve cover requires a large number of seals.
The motors are more revving and can withstand high speeds over a long period of time. Earlier MB six-cylinder engines were previously criticized for their slowness and reluctance to run at high speeds. This criticism silenced Mercedes-Benz with this engine. In the lower speed range one expects more torque, but in the upper range one is compensated with respectable driving performance. With a specific output of 49.5 kW / l (67.4 PS / l), the 280 E / 8 is over 200 km / h and accelerates from 0 to 100 km / h in 9.5 seconds.
At first the engine type M 110 was built for the parallel models 280 and 280 S (without the "E") with double register carburetor Solex 4A1 (that means without injection system). These carburettor engines quickly fell into disrepute because of their high consumption. The injectors consistently consume around two to three liters less petrol and, depending on the type, also produce 15 to 21 kW more.
meaning
The engine type M 110 is the last and, with the 136 kW (185 hp) models, also the most powerful model of the in-line six-cylinder design concept launched in 1951 for the Mercedes 220 model with the M 180 engine . With a construction period of more than 30 years, it is one of the most successful and longest lasting of all engine families. In 2007 hundreds of thousands of these engines were still on the roads of the world. With its 2.8 liter capacity, which is sufficient even for heavy cars, with its easy turning due to the cylinder head with double camshafts and with its smooth running as a well-balanced six-cylinder, it still has pleasant usage properties today. However, it is measured by today's standards with a consumption of min. 12 liters per 100 km no longer an economical engine. The exhaust gas values are also only acceptable when operated with a catalytic converter. In many oldtimers and youngtimers in various countries, however, the engine continues to enjoy great popularity due to its reliability and power delivery. However , from the point of view of engine specialists and authorized Mercedes-Benz workshops, operating these engines with economical and very clean LPG systems is not recommended, as the valve seats of this engine series are sufficiently hardened for operation with unleaded petrol, but not for operation with LPG are. However, by using a fuel or gas additive, the valve seat lubrication reduced by gas operation and the higher combustion temperatures at the valves can be compensated for.
variants
All variants have in common:
- Hole 86 mm
- Stroke 78.8 mm
- Cubic capacity 2746 cm³
M 110.921 / M 110.931
Use:
M 110.922 / M 110.932
The .932 version is the less compressed version of the .922.
Output .922: 118 kW (160 PS) at 5500 rpm.
Output .932: 107 kW (145 PS) at 5500 rpm.
Use:
- 1972-1980 280 pp
M 110.923
Output: 115 kW (156 hp) at 5500 rpm, or 105 kW (143 hp) at 5500 rpm for the lower compression variant.
Use:
M 110.924
Output: 115 kW (156 hp) at 5500 rpm, or 105 kW (143 hp) at 5500 rpm for the low-compression variant.
Use:
- 1979-1985 280 pp
M 110.926
Output: 115 kW (156 hp) at 5500 rpm, or (105 kW) 143 hp at 5500 rpm for the low-compression variant.
Use: 09 / 1972-09 / 1980 in the 116 | series 280 S 10 / 1980–1985 Mercedes-Benz in the 126 | series 280 p
In the last variant of the M 110 carburettor engine, improvements to the engine and carburetor reduced fuel consumption by 10%.
| Working method | Four-stroke - Otto |
| arrangement | standing lengthways in front |
| Type / model | M 110 V28 /110.924M from 10.81 110.926 |
| Number and arrangement of cylinders | 6 / row |
| Bore × stroke | 86.0 x 78.8 mm |
| Total displacement | 2746 cm³ (according to tax formula 2717 cm³) |
| Compression ratio | 9.0: 1 |
| Crankshaft bearings | 7th |
| power | 156 hp / 115 kW at 5500 rpm |
| Torque | 223 Nm at 4000 rpm |
| Number and arrangement of valves | 1 inlet valve, 1 outlet valve, V-shaped hanging |
| Valve control | two overhead camshafts ( DOHC ) |
| Camshaft drive | Duplex roller chain |
| Mixture formation | 1 double register carburetor Solex type 4A1 |
M 110.981 / M 110.991
The M 110.981 contains the Bosch D-Jetronic injection system. This system determines on the basis of the values of ambient temperature, engine temperature, negative pressure in the intake tract and throttle valve position, and uses an analog control unit to calculate the injection duration of the electromagnetically controlled injection valves.
The .991 is the low-compression version of the .981.
Output .981: 136 kW (185 hp) at 6000 rpm
.991: 125 kW (170 hp) at 6000 rpm
Use:
M 110.982 / M 110.992
The .992 is the low-compression version of the .982.
Output .982: 136 kW (185 hp) at 6000 rpm.
Output .992: 125 kW (170 hp) at 6000 rpm.
Use:
M 110.983 / M 110.993
The .993 is the low-compression version of the .983.
Output of the .983: 136 kW (185 hp) at 6000 rpm.
Output of the .993: 125 kW (170 hp) at 6000 rpm.
Use:
M 110.984
The M 110.984 was the first engine with the new Bosch K-Jetronic injection.
Compression ratio 8.7: 1
output: 130 kW (177 hp) at 6000 rpm up to April 1978; 185 hp (136 kW) at 5800 rpm from April 1978.
Torque: 234 Nm at 4500 rpm
Use:
M 110.985
Output: 130 kW (177 hp) at 6000 rpm until April 1978; 185 hp (136 kW) at 5800 rpm from April 1978
Use:
M 110.986
Output: 130 kW (177 hp) at 6000 rpm until April 1978; 136 kW (185 PS) at 5800 rpm from April 1978.
Use:
M 110.987
Output: 136 kW (185 hp) at 5800 rpm.
Use:
M 110.988
Output: 136 kW (185 PS) at 5800 rpm
Torque: 240 Nm at 4500 rpm
Compression: 9.0: 1
Maximum speed: 6600 rpm
Consumption: 12.5 l / 100 km
Use:
M 110.989
Output: 136 kW (185 hp) at 5800 rpm
Use:
M 110.990
Output: 136 kW (185 hp) at 5800 rpm.
Use:
- 1981–1985 280 SL
- in exchange also called M 110.010
M 110.994
Especially for G-Class / K-Jetronic .
Output: 115 kW (156 hp) at 5250 rpm up to 1984; 110 kW (150 PS) at 5250 rpm from 1984. Torque: 226 Nm at 4250 rpm
Use:
- 1981-1989 280 GE
Individual evidence
- ↑ http://mb.faq.t4media-agency.de/fileadmin/pdf/100153_Index_3.pdf (PDF no longer available)
