The overall structure of diesel engine mainly includes: engine block, crank-connecting rod mechanism, valve train, fuel system, lubrication system, cooling system and electrical system.
1. Engine block: it is the skeleton of diesel engine, which supports and installs other components, including cylinder block, cylinder liner, cylinder head, cylinder gasket, oil pan, flywheel housing, timing gear housing and front and rear feet.
2. Crank-connecting rod mechanism: it is the main moving part of diesel engine, and it can transform the energy generated by fuel combustion into mechanical energy through piston, piston pin, connecting rod, crankshaft and flywheel. Comprise a crankshaft, a connecting rod, a piston, a piston pin, a piston pin circlip, a piston pin bushing, a piston ring, a main shaft bearing, a connecting rod bearing, front and rear oil seals of the crankshaft, a flywheel, a shock absorber and the like.
3. Valve train: it is to open and close the intake and exhaust valves regularly. Including timing gear, camshaft, tappet, ejector pin, rocker arm, valve, valve spring, valve seat ring, valve guide, valve lock block, intake and exhaust pipe, air filter, muffler, supercharger, etc.
4. Fuel supply system: it supplies diesel fuel to the combustion chamber for combustion regularly and quantitatively according to the needs of diesel engine. Including diesel tank, oil pipeline, diesel filter, fuel injection pump, fuel injector, etc.
5. Lubrication system: it supplies lubricating oil to all moving friction pairs, including oil pump, oil filter, pressure regulating valve, pipeline, instrument and oil cooler.
6. cooling system: it radiates the heat generated when the diesel engine works to the atmosphere. Including water tank, water pump, fan, water pipe, thermostat, water filter, fan belt, water thermometer, etc.
7. Electrical appliances: auxiliary equipment for starting, lighting, monitoring and operation. Including generators, starting motors, batteries, relays, switches, circuits, etc.
Extended information:
In order to prolong the service life of diesel engines, it is necessary to strengthen the maintenance of air filters, lubricating oil filters and fuel filters and give full play to their functions.
when installing the air filter, you must not miss, reverse or misplace all the sealing gaskets and rubber connecting pipes, and ensure the tightness of each fitting. The paper dust cup air filter used should be cleaned once every 5-1 hours, and the surface dust can be brushed off with a soft brush. If the working time exceeds 5 hours or it is damaged, it should be replaced in time.
if the lubricating oil filter is not maintained in time during the use of diesel engine, the filter element will be blocked, the lubricating oil pressure will increase, the safety valve will be opened, and the lubricating oil will directly flow into the main oil passage, which will aggravate the wear of the lubricating surface and affect the service life of diesel engine. Therefore, the lubricating oil filter should be cleaned once every 18-2 hours. If it is found to be damaged, it should be replaced immediately to prevent impurities from entering the lubricating surface.
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