Crank ventilation systems are a system designed to control the pressure and combustion gases formed during engine operation. These gases, which accumulate in the crankcase of the engine, may cause oil leaks, pressure accumulation and performance decrease in the engine if they are not evacuated correctly. The crank ventilation system directs these gases to the intake manifold in a controlled manner, ensuring re-combustion and thus contributing to the efficient operation of the engine. It reduces environmental emissions by extending engine life.

What are Crank Ventilation Systems?

Crank ventilation systems are an important component of modern internal combustion engines and play a vital role in engine performance and efficiency. The crankshaft is located at the bottom of the engine and is directly related to piston movement. Gases released during the combustion process may leak into the crankcase during the up-and-down movement of the pistons. Accumulation of these gases in the crankcase increases the pressure inside the engine and can cause serious problems. This is where the crank ventilation system comes into play.

This system directs the gases accumulated in the crankcase to the engine's intake manifold and re-introduces them into the combustion cycle. Thus, while the pressure inside the engine is balanced, the release of gases into the environment is prevented. If crank ventilation systems do not work properly, engine performance decreases and problems such as oil leaks and high emissions occur.

Crank Ventilation System Prices

Crank ventilation systems are of critical importance for the engine efficiency and life of the vehicle. Prices may vary depending on the brand of the system, its suitability for the vehicle model and the quality of the materials used. Replacing a faulty crank breather valve or replacing other components in the system can be costly. Therefore, regular checking and maintenance of the system can help reduce costs in the long run.

Duties of Crank Ventilation Systems

The primary task of crank ventilation systems is to balance the excess pressure in the engine crankcase and ensure that the engine operates more efficiently. Gases and oil mist accumulating in the crankcase lead to pressure buildup that can damage the engine over time. In this case, the crankcase ventilation system performs the following functions by keeping the pressure in the crankcase under control:

1. Pressure Compensation: When the gas pressure in the crankcase is not controlled, the pressure inside the engine increases and this can lead to leakage of oil seals or gaskets. The crank ventilation system ensures stable operation of the engine by relieving this pressure.

2. Recycling of Oil Vapor:The oil vapor and gas mixture that occurs during engine operation is directed to the intake manifold and re-introduced into the combustion cycle. In this way, oil loss within the engine is reduced and emissions are kept at a minimum level.

3. Engine Cleanliness and Efficiency: Correctly evacuating the gases accumulated in the crankcase from the engine helps keep the engine clean. Regulating the pressure within the engine provides a better seal between the pistons and cylinder walls, which increases fuel efficiency.

4. Emission Control: The crank ventilation system contributes to the reduction of environmental pollution by preventing the release of harmful gases from the engine directly into the atmosphere. It serves as a part of environmentally friendly emission systems in modern vehicles.

Working Principle of the Crank Ventilation System

The crank ventilation system works by directing the gases formed in the crankcase to the intake manifold of the engine. Several key components come into play in this process:

1. Crank Vent Valve (PCV Valve): The PCV valve, known as Positive Crankcase Ventilation, is a component that directs crankcase gases to the intake manifold. This valve controls gas leaks in the engine by balancing the pressure inside the crankcase and reduces harmful emissions to the environment.

2. Oil Separator: Some crankcase ventilation systems use an oil separator to separate the oil vapor that comes with the gases from the crankcase. This component allows the oil to return to the engine, ensuring that the crankcase gases are directed only to the intake manifold.

3. Intake Manifold: Gases directed back to the engine through the PCV valve enter the intake manifold and are re-included in the combustion process. Controlled combustion of these gases keeps the engine clean and prevents the release of environmentally harmful gases into the atmosphere.

Importance of the Crank Ventilation System

The crank ventilation system has a great impact on engine performance and long life. When the system does not work properly, gases accumulating in the crankcase can damage the internal parts of the engine over time and cause the following problems:

1. Oil Leaks: Malfunctions in the crankcase ventilation system can cause pressure to build up inside the engine. This pressure causes damage to oil seals and gaskets and oil leaks.

2. High Emissions: When crank gases are not properly removed from the engine, gases reaching the intake manifold can cause incomplete combustion. In this case, the risk of releasing harmful gases into the atmosphere increases and the vehicle's impact on the environment changes negatively.

3. Engine Performance and Efficiency Loss: Accumulation of crankcase gases and increase in pressure inside the engine reduce engine performance. This may increase fuel consumption and lead to a decrease in the overall efficiency of the vehicle.

Crank Ventilation System Malfunctions and Symptoms

Failure of the crank ventilation system can lead to serious effects on the engine. Early detection of malfunctions and symptoms that may occur in this system can prevent greater damage to the engine. Here are some symptoms of malfunctions in the crank ventilation system:

1. Leaks in Oil Seals: When the crank ventilation valve does not work properly, the pressure inside the engine increases and may cause leaks in the oil seals. In this case, the engine oil level may decrease rapidly and serious problems may occur in the vehicle's engine.

2. Irregular Engine Operation: When the PCV valve is clogged or malfunctions, excessive gas mixture may enter the intake manifold. This may cause the engine to run irregularly, have idling problems and even stall the engine.

3. High Fuel Consumption: When the crank ventilation system does not work properly, the combustion efficiency inside the engine decreases and this may increase fuel consumption.

Maintenance of the Crank Ventilation System

Regular maintenance of the crank ventilation system is important for the healthy operation of the engine. This maintenance includes cleaning or replacing the PCV valve, checking the oil separator system, and cleaning the intake manifold regularly. Maintenance of the system contributes to the longevity of the vehicle and increases engine performance.

It is recommended to check the crank ventilation system, especially when vehicles have high kilometers or a decrease in engine performance is observed. In this way, possible problems are detected early and further damage to the engine is prevented.