Mercedes-Benz M 159 petrol engine
|Daimler Benz AG|
|Manufacturer:||Daimler Benz AG|
|displacement:||2594 cm 3|
|Fuel supply:||Solex 32 JFF|
The Mercedes-Benz M 159 is a gasoline engine of Daimler-Benz AG , which was developed for light commercial vehicles up to 1.5 t and large passenger cars.
The M 159 is an uncharged in-line six-cylinder engine with spark ignition , OHV valve control , wet sump lubrication and water cooling , which operates on the four-stroke cycle . With a cylinder bore of 80 mm and a piston stroke of 86 mm, the engine has a total stroke of 2594 cm 3 . Its rated output is 60 hp (44 kW) at 3000 min -1 .
The body of the engine is in three parts: the lowest part is the oil pan made of light metal, which is ribbed for better oil cooling. On the oil pan sits a kind of "frame" that can be separated for maintenance of the engine from the adjacent engine block. This frame is intended to improve the sealing of the crankshaft to the flywheel. The engine block with the cylinders is made of gray cast iron and is mounted on the frame. The crankshaft runs between the frame and the engine block in four steel bowl bearings with white metal spout, the foremost bearing is a foothold. The bearing caps are attached to the engine block with two screws each. The cover of the timing case for the camshaft drive is bolted to the front of the engine. The camshaft is slightly below the center of the engine in the engine block. From the main oil pipe drilled in the engine block, branches lead to the bearings of the camshaft and crankshaft. The pistons are supplied by Mahle and made of light metal. They each have three compression rings and one oil scraper ring. The bearings of the connecting rods are filled with lead bronze . At every crankshaft cranking counterweights are attached, vibration dampers do not exist.
The engine has a cylinder head for all six cylinders. Its aluminum molded cap is rounded to favor the drainage of engine oil. At the top, a channel, which is closed with a lid, is inserted in it for the ignition cables. The intake manifold is housed on the right side of the engine together with the carburetor and is heated by the exhaust manifold with two tubes which are routed across the cylinder head; the exhaust manifold is on the left side of the engine. The combustion chambers in the cylinder head are hemispherical, the valves, each cylinder an inlet and an outlet valve, are opposite each other and are inclined, which allows a large valve disk cross-section. The spark plug is guided between the valves vertically from above into the combustion chamber. It is sealed by means of sheets to the mechanical parts of the cylinder head. The valves are actuated by the roller chain driven camshaft on the side of the crankcase via tappets, inclined bumpers and rocker arms. Like the cylinder head, the rocker shafts are in one piece and run through the entire cylinder head; all rocker arms are stored on them. The rocker shafts themselves are mounted on four blocks. The valves are made of cast iron and are pushed back by a spring into their original position. all rocker arms are stored on them. The rocker shafts themselves are mounted on four blocks. The valves are made of cast iron and are pushed back by a spring into their original position. all rocker arms are stored on them. The rocker shafts themselves are mounted on four blocks. The valves are made of cast iron and are pushed back by a spring into their original position.
The fuel air mixture is treated by a Solex 32 JFF double downflow gasifier . The designed as a diaphragm pump fuel pump is driven by the camshaft. For wet sump lubricationA gear oil pump is mounted above the oil pan, driven by the camshaft via a helical gear and a shaft. The shaft extends from the camshaft obliquely down to the oil pump. The ignition distributor is located on the upper end of the shaft. The oil pump sucks the oil out of the sump and presses it into the cavity between the shaft and its housing, from where it enters the slit filter and then into the main oil line. The water pump is mounted on the cylinder head and, together with the alternator, is driven by the same V-belt from the crankshaft.
|engine design||Line six-cylinder engine|
|principle of operation||gasoline engine|
|mixture preparation||Double downflow gasifier Solex type 32 JFF|
|valve control||OHV valve control , |
1 × inlet, 1 × outlet valve
|Bore × stroke||80 × 86 mm|
|capacity||2594 cm 3|
|Rated speed||3000 min -1|
|rated capacity||60 hp / 44.1 kW|
|Torque at rated speed||140.5 N · m|
|Medium working pressure||6.8 bar|
|Maximum working pressure||8.1 bar|
|compression ratio||6.3: 1|
|Specific fuel consumption||334.5 g / kWh|