The oil pressure inside the lubrication system is controlled primarily by a pressure relief valve.
Controlling Oil Pressure
Maintaining the correct oil pressure is crucial for the proper functioning and longevity of an engine's lubrication system. Pressure that is too low can lead to inadequate lubrication, while pressure that is too high can potentially damage components. The mechanism specifically designed to prevent excessive pressure buildup is the pressure relief valve.
Based on the provided information:
- A pressure relief valve is provided in the path between the oil pump and filter. The relief valve limits the maximum pressure of the oil in the system.
This valve acts as a safety mechanism. When the oil pump generates pressure exceeding a predetermined limit (often set by a spring within the valve), the valve opens. This opening allows excess oil to bypass the filter and the main lubrication galleries, rerouting it back to the oil sump or the pump inlet. This action prevents the system pressure from rising above the desired maximum level, protecting sensitive components and seals from damage due to over-pressurization.
Key components and their roles in pressure:
- Oil Pump: Generates the flow of oil, creating pressure.
- Pressure Relief Valve: Acts as a regulator to limit the maximum pressure generated by the pump.
- Oil Filter: Cleans the oil, typically located after the pump and before the main lubrication points, meaning it is subject to the pressure controlled by the relief valve.
By limiting the maximum pressure, the relief valve ensures a consistent and safe operating pressure range for the entire lubrication circuit.
