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Crankcase ventilation

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12 395 37 S02 oil separator (ProVent² 200)
12 395 37 S02 oil separator (ProVent² 200)
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13 439 08 S02 oil separator (ProVent² 100)
13 439 08 S02 oil separator (ProVent² 100)
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Net price: €112.50
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274-7913 crankcase ventilation
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2992447 crankcase ventilation
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3421725 crank case ventilation Caterpillar
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39 000 67 352 oil separator
39 000 67 352 oil separator
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39 310 70 130 oil separator
39 310 70 130 oil separator
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Net price: €116.70
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Stock: 19
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39 310 70 200 oil separator
39 310 70 200 oil separator
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Net price: €100.60
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39 310 70 470 oil separator
39 310 70 470 oil separator
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39 310 70 550 oil separator (ProVent 200)
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Net price: €158.60
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Delivery time: 2 weeks
39 310 70 700 oil separator (ProVent 400)
39 310 70 700 oil separator (ProVent 400)
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39 310 70 790 oil separator (ProVent 100)
39 310 70 790 oil separator (ProVent 100)
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Net price: €110.90
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39 310 70 791 oil separator (ProVent 100)
39 310 70 791 oil separator (ProVent 100)
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Delivery time: 2 weeks
39 310 70 792 oil separator (ProVent 100)
39 310 70 792 oil separator (ProVent 100)
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Net price: €101.00
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Stock: 19
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Delivery time: 1-2 days
39 310 70 793 oil separator (ProVent 100)
39 310 70 793 oil separator (ProVent 100)
MSRP: €138.30
Net price: €101.00
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39 310 70 800 oil separator (ProVent 800)
39 310 70 800 oil separator (ProVent 800)
MSRP: €1,288.80
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39 310 70 870 oil separator (ProVent 150)
39 310 70 870 oil separator (ProVent 150)
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5801659560 crankcase ventilation CNH
MSRP: €126.00
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Delivery time: 2-3 weeks
5801686484 crankcase ventilation CNH
5801686484 crankcase ventilation CNH
MSRP: €47.40
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5801856860 crankcase ventilation CNH
MSRP: €160.50
Net price: €141.30
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7CPP20-290 separator filter
MSRP: €857.60
Net price: €703.30
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88467A crankcase ventilation
MSRP: €134.46
Net price: €124.00
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93192A crankcase ventilation
MSRP: €2,388.60
Net price: €2,202.30
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93194A crankcase ventilation
MSRP: €1,511.65
Net price: €1,393.80
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Delivery time: 1-2 days
Kurbelgehaeuseentlueftung

How does crankcase ventilation (CCV) work? 

The crankcase ventilation system has the task of removing gases and oil mist from the crankcase and maintaining the vacuum in the crankcase at the required level. It plays a central role in the engine of a motor vehicle. A crankcase ventilation system ensures that the pressure conditions in the combustion chamber of reciprocating piston engines (petrol and diesel engines) are regulated. When the engine is running, so-called blow-by gases are produced inside, which pass the piston rings and enter the crankcase. There they mix with the oil mist created by the crankshaft rotating in the oil. The incoming combustion gases also increase the pressure in the crankcase. However, as there should be a slight vacuum there, the blow-by gases mixed with oil must be discharged. If these gases were not vented, a dangerous increase in pressure could occur, which would damage seals and components. Venting must be carried out in a controlled manner to prevent such damage. 


What systems are available? 

In the past, blow-by gases were discharged directly into the environment using a simple, open system. Although this form of crankcase ventilation was simple and inexpensive, it led to increased environmental pollution and higher oil consumption. As a result, a more or less large oil stain often formed under the stationary vehicle. It was a matter of course for the driver to check the oil level regularly and top up the oil if necessary.

Nowadays, almost exclusively closed systems are used, which are a more environmentally friendly and efficient solution. These reduce emissions, minimise oil consumption and contribute to clean engine operation.

The first closed systems were often inadequate separators that did not separate the contained oil from the gas at all or only insufficiently. However, this type of oil led to new problems, so the idea arose of filtering the gases before introducing them into the combustion air. The tightening of exhaust gas legislation led to pressure on the industry to make such improvements.

In modern turbocharged engines, such as turbo engines, ventilation is additionally supported by the increased pressure. Modern crankcase ventilation filters therefore serve to remove oil droplets from the exhaust gases and return the separated oil to the oil circuit.Optimised crankcase ventilation ensures that as few of the small droplets as possible hit the hot and fast-rotating rotor of the turbocharger.An accumulation of particles on the hot vanes would lead to a change in the geometry of the turbocharger vanes due to the oil crust that forms.This would result in a deterioration in the efficiency of the turbocharger and thus of the entire engine. A further consequence would be a deterioration in exhaust gas quality, reduced performance and higher fuel consumption.


What are the advantages of crankcase ventilation? 

Let's assume that the engine works like a high-performance steam boiler. Each combustion process in the cylinder generates immense pressures, some of which escape into the crankcase. Uncontrolled ventilation would lead to a permanent pressure load on important components such as seals. The crankcase ventilation ensures that the blow-by gases are drained off, separating the oil that is carried along.

In a new engine, the crankcase ventilation system is not yet fully utilised. However, as the engine ages, the importance of crankcase ventilation increases. As the engine wears internally, the gaps become larger, which leads to an increase in the amount of blow-by. If the filter is optimally designed and a high-performance medium is used, it can reliably separate even the smallest and most finely dispersed droplets. The pressure control ensures that the vacuum in the crankcase does not increase too much or is always kept within the optimum range.

A flow-optimized geometry and a corresponding design of the KGE in conjunction with the appropriate filter medium reduce the entry of oil droplets into the combustion to a minimum. This ensures that the legal requirements and requirements are met safely and reliably.

Compared to an open system, the oil deposited in the KGE reduces the oil level in the engine to a much lesser extent. Oil consumption is reduced, resulting in savings on refilling oil. A high-quality KGE filter thus ensures optimal engine performance and exhaust quality, as well as lower oil consumption.  


What must be considered when designing a KGE system? 

The design of KGE systems requires a high level of technical know-how as well as detailed knowledge of the engine involved. In addition, a corresponding level of experience in adapting a KGE is required. In many cases, testing and measurements are essential. 


How to detect a defective crankcase vent? 

A malfunctioning KGE is usually not visible to the user at first glance, as corresponding monitoring systems such as a vacuum meter are not installed in practice. In a modern car, this can be detected as part of the exhaust gas test. However, this depends on the age and mileage as well as the condition of the engine.

A crankcase vent defect is often due to porous or leaking components, such as hoses or seals. The high pressure, high temperatures and aggressive composition of the blow-by gases lead to premature aging of these parts. Such a defect has similar effects to a leaky valve cover gasket, as the system draws in false air and as a result cannot operate efficiently.

In this context, the valve cover seal is crucial. It not only ensures the protection of the engine oil, but also supports crankcase venting by ensuring the necessary negative pressure in the system. A defective valve cover seal means that the blow-by gases can no longer be discharged efficiently. This leads to an increase in crankcase pressure and potentially engine damage.

Crankcase pressure also plays a critical role in engine performance and efficiency. Too high pressure causes oil to get into areas where it doesn't belong, such as the combustion chambers or intake tract. This leads to increased oil consumption, stress on the catalyst and deposits that affect engine performance. Too low pressure, on the other hand, can damage the seals and disrupt the oil supply. Modern vehicles are therefore equipped with sensors that monitor the crankcase pressure and ensure that it is always in the optimal range.  


When should the filter element be replaced? 

Please note that the replacement of the filter element is individually regulated by the engine and should be carried out according to the engine manufacturer's interval specifications. Generally, the intervals are linked to the replacement of the air filter. Please refer to the engine's operating manual for details.