2.0L diesel engine
1. Oil level gauge; 2. Fan; 3. Top dead center mark; 4. Belt pulley of the crankshaft; 5. Oil pump drive chain; 6. Oil pan; 7. Oil pump; 8. Crankshaft; 9. Flywheel 10. Piston; 11. Cylinder; 12. Oil filter; 13. Removal of the inlet pipe; 14. Glow plug; 15. Nozzle; 16. Hydraulic poppet; 17. Double roller chain
2.0L diesel engine
1. Camshaft; 2. Hydraulic poppet; 3. Inlet channel; 4. Outlet pipe outlet; 5. Thermostat (coolant regulator); 6. Piston; 7. Connecting rod; 8. Oil pan 9. Engine oil drain plug; 10. Oil pump; 11. Crankshaft; 12. Fuel pump gear; 13. Control circuit; 14. Fuel pump; 15. Removal of the inlet pipe; 16. Throttle cable (throttle cable)
2.0L engine
80. Camshaft bearing cap; 81. Camshaft bearing cap; 82. Camshaft bearing cap; 84. Hex head bolts, 25 Nm; 84a. Washers; 125. Cylinder head cover; 185. Camshaft; 186. Lock washer; 187. Cylindrical pin; 188. Camshaft gear; 189. Washer; 190. Dodecagon head bolt, 25 Nm + 90°; 203. Valve pusher; 210. Control circuit; 224. Chain tensioner; 237. Gasket o-ring; 400. Pressure oil pump
Mercedes C-class is equipped with in-line, 4- or 5-cylinder diesel engines.
In diesel engines, clean air is sucked into the cylinder and subjected to strong compression there. Due to this, the temperature in the cylinders rises to the ignition temperature of diesel fuel (about 600°C). When the piston is near top dead center, fuel is injected into the compressed air and self-ignites, so there is no need for spark plugs. But in a very cold engine, compression cannot lead to ignition temperature. Therefore, for heating in each swirl chamber of the diesel engine there is a glow plug, which is powered by voltage supplied through the preheating relay.
Fuel pump (injector pump) receives fuel from the fuel pump. Diesel fuel is supplied to the fuel pump, where the high pressure necessary for its injection is created (100–125 bar). The fuel pump regulator controls the amount of fuel injected according to the actuation of the accelerator pedal. At the right moment, fuel is injected through nozzles into the prechamber of the corresponding cylinder. Before the fuel enters the fuel pump, it passes through the heat exchanger. There, the fuel is preheated so that it does not thicken much and does not create plugs in the fuel lines and filter. The fuel filter retains mechanical impurities and water, and therefore it is extremely necessary to change the filter in accordance with the maintenance instructions.
The fuel and fuel priming pumps are maintenance-free. Both pumps are driven by the crankshaft through a control circuit that also drives the camshaft. An opening in the cylinder head provides lubrication of each of the two pumps with engine oil.
Engine model | |||
C200 | C220 | C250 | |
Release time from | 6/93 | 6/93 | 6/93 |
Type | 202.120 | 202.121 | 202.125 |
Engine | 601.913 | 604.910 | 605.910 |
Working volume, cm3 | 1997 | 2155 | 2497 |
Power, kW at rpm hp at rpm | 55/4600 75/4600 | 70/5000 95/5000 | 83/5000 113/5000 |
Torque, N·m at rpm. | 130/2000 | 150/3100 | 170/2800 |
Cylinder diameter, mm | 87,0 | 89,0 | 87,0 |
Piston stroke, mm | 84,0 | 86,6 | 84,0 |
Compression ratio | 22 | 22 | 22 |
Number of cylinders | 4 | 4 | 5 |
Number of valves per 1 cylinder | 2 | 4 | 4 |
Fuel pump / control | 4-speed /arf | EVE | 5-speed /ere |
The order of operation of the cylinders | 1–3–4–2 | 1–3–4–2 | 1–2–4–5–3 |
Filling capacities: | |||
- engine oil (with filter), l | 6,0 | 6,5 | 7,0 |
– coolant, l | 8,0 | 7,0 | 7,5 |
ARF - exhaust gas recirculation
EVE - injection system with electronically controlled distributor
ERE - electronic sequential injection system