Classification of the oil pan

Oil pan is the English name for: OIL PAN GASKET, located in the lower part of the engine: detachable, and seal for axle box oil sump casing. The oil pan is the lower portion of the crankcase, also known as the lower crankcase. Closed crankcase oil sump casing, preventing impurities from entering, and collected and stored by a stream of the frictional surface of diesel engine lubricating oil, part of sanqu heat, preventing oil oxidation. Oil pan is made of a thin sheet metal, and filled with oil baffle to avoid bumps caused by shocks to the right splash of diesel engine and lubricating oil impurities precipitated side equipped with a dipstick to check the oil. In addition, oil pan bottom is also equipped with a drain plug at the bottom.
Market Shang see of most car are is wet type oil late shell, is named for wet type oil late shell is due to engine of crankshaft song turn and Rod butters in crankshaft each rotating a week will immersion oil late shell of lubricants within once, up to lubrication role, while due to crankshaft of high-speed running, song turn each high-speed immersion oil pool within are will provoked must of essential oil and oil fog, on crankshaft and bearing for lubrication, called splash lubrication. Such on lubricants in oil late shell within of liquid surface height on has has must of requirements, if too low has, crankshaft song turn and Rod butters cannot immersion lubricants within, led to missing lubrication and Shun sliding crankshaft and Rod and bearing; if lubricants liquid surface too high and will led to bearing whole immersion, makes crankshaft of rotating resistance increases, eventually led to engine performance declined, while lubricants easy entered cylinder combustion chamber within, led to engine burn oil, spark plug product carbon, problem. This lubrication method is simple in structure, do not need to set up another tank, but the inclination of the vehicle must not be too large, otherwise they will be in oil, oil spills caused by burnt cylinder.
Dry-sump with in many racing engines. It does not store oil in the oil pan, it is more accurate to say that there is no oil pan. In the crankcase of the friction surfaces of these movements through a pore pressure of oil lubricated. Dry-sump engine was cancelled due to the oil pan of the function of storing oil, so oil pan height is greatly reduced, engine height is reduced, the Center is conducive to the benefits of reducing control. The main advantage is to avoid the wet-sump, those due to the intense drive to produce negative phenomenon. However, due to all the pressure comes from the oil pump lubricating oil. Oil pump power is coming through the rotation of the crankshaft through a gear connection. While in the wet-sump engine oil pump to provide pressure to camshaft lubrication is needed. But this pressure is very small, and pump needed momentum is very small. In dry-sump engine, however, the strength of this pressure lubrication needs much better. And oil pump size than wet-sump engine oil pump a lot. So this time to pump the motivation that you need more. This same as the supercharged engine, oil pump need to consume part of engine power. Especially in times of high speed, the engine speed increases, friction parts increases the intensity of need lubricating oils, so they need oil pump provides more pressure, crankshaft power consumption has increased.
Obviously such a design is not suitable for ordinary civilian car engine, because it requires some loss of engine power, will not only affect the power output, and not conducive to improving efficiency. Dry-sump will only be equipped with large or high-power engines, such as those born to competitive driving sports cars. For example Lamborghini is the dry-sump design, for it is, improve the lubricating effect of limits and lower center of gravity is more important, which can power through other aspects make up for improved outcomes, as regards the economy, is that this model does not need to be considered.

The oil pan failure phenomenon

Engine lubricating system and cooling system are independent of the two systems, under normal conditions, engine cooling water will not enter the oil pan. In the practical work, however, often encounter the phenomenon of cooling water into the OIL PAN GASKET. Oil sump water, oil dilution, deterioration or even emulsification. Not resolved in a timely manner can cause mechanical wear, and even lead to axle burned down.

1. engine oil sump water failed primary image
(1) not cooling properly reduced.
(2) the oil pressure decreases. If the oil pressure is reduced at the same speed 100~200kPa should be checked for time reasons.
(3) continuous firing or let stand a few hours later, major increases in oil level in the oil pan, engine oil quantity, not less, increasing, sometimes overflows from the Vernier scale.
(4) the crankcase and breathing apparatus with white mist phenomena, sometimes also of breathing apparatus drops.
(5) the oil pan into the water early in the oil drops, for a long time, the oil will become milky white.
(6) water “boiling” or “double bubble” phenomena. Description cylinder liner cracked, water enters the sump.
2. Reasons for engine inlet
(1) cylinder liner seal ring seal is bad.
(2) the oil cooler is damaged, some cooling water into the lubrication system.
(3) some engine cooling water pump bearing is oil lubrication of the engine, if the water seal, and seal the aging or damaged, water will enter the lubrication system.
(4) cylinder liners has cracks or cylinder “pitting” caused serious holes, water will seep into the cylinders into the oil pan.
(5) cracked the cylinder cover, cooling water directly into the cylinder into the oil pan.
(6) hole at the top of the cylinder cover bulkhead loose due to vibration so that cooling water by putting holes into the oil pan.
(7) the tappet Interior body as Foundry Sand hole, inner cooling water leak out of trachoma, tappet room back into the oil pan, this fault is difficult to check.
(8) the engine cylinder head gasket connecting after being washed with water, cooling water directly into the cylinder flows into the oil pan.
(9) the water seal between the cylinder head and cylinder damage. If the cylinder head bolts is loose, also causes the cooling water into the cylinder.
(10) for dry-type sleeves, if the body was “CAVITATION” grave, water body into cylinder liner, cylinder bore damage due to uneven heating, cooling water still have cylinder liners into the oil pan.