Oil Pump Pressure Control via Engine Knocking Sensor
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Solution Overview
Problem
Existing engine oil pressure control systems fail to adequately address engine knocking, leading to piston overheating and potential engine damage, especially during sudden vehicle maneuvers, due to insufficient oil supply and lack of efficient pressure regulation.
Innovation Solution
An apparatus that includes a knocking sensor and a control unit to determine engine knocking conditions and adjust oil pump pressure, increasing pressure when knocking occurs to ensure proper piston cooling, using a normal mode or high-pressure mode based on sensed parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a separate check valve and passage improvement are used to control engine oil pressure, then the pressure control capability is improved, but the device complexity increases
Solution Approach 1:
The patent combines the knocking sensor, control unit, and oil pump into an integrated system where the control unit directly regulates oil pump pressure based on knocking detection. This merges multiple previously separate components (check valve, passage improvements, sensor system) into a unified control architecture that achieves pressure control without additional mechanical valves or passage modifications.
Solution Approach 2:
The patent replaces mechanical pressure control methods (check valves, passage improvements) with an electronic control system. The control unit uses electrical signals from the knocking sensor to electronically regulate the oil pump, substituting mechanical pressure regulation components with an electronic feedback control mechanism that directly adjusts pump pressure based on real-time knocking conditions.
2Reliability
If engine oil pressure is increased to prevent knocking, then piston cooling effectiveness is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic oil pressure regulation where the control unit continuously adjusts oil pump pressure based on real-time knocking sensor feedback. Instead of maintaining constantly high pressure, the system adjusts pressure levels dynamically - increasing pressure only when knocking is detected and returning to normal levels when knocking stops, thereby maintaining piston cooling effectiveness only when necessary and reducing energy consumption during normal operation.
Solution Approach 2:
The patent changes the operating parameters of the oil pump based on knocking conditions. The control unit modifies pump pressure parameters in response to knocking sensor signals, transitioning between different pressure states (normal mode vs. high-pressure mode) to match actual cooling needs, thereby optimizing the balance between cooling effectiveness and energy consumption.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus effectively prevents engine knocking and related damage by ensuring adequate oil pressure is maintained at the piston, enhancing engine performance and fuel efficiency by optimizing oil distribution during varying driving conditions.
Implementation Method 1
a sensor for sensing knocking of an engine
Implementation Method 2
the parameter may be one of a voltage value, whether a bit is generated, and whether a preignition signal is generated, which are sensed through the knocking sensor
Implementation Method 3
an oil pump configured to determine a pressure for discharging engine oil toward a piston of the engine
Implementation Method 4
oil is conventionally injected into the piston using a cooling jet to cool the piston through heat exchange between the oil and the piston
Data Source
AI summary
An apparatus for controlling oil pump pressure includes a sensor for sensing knocking of an engine, an oil pump configured to determine a pressure for discharging engine oil toward a piston of the engine, and a control unit configured to control the pressure of the engine oil discharged toward the piston by determining whether the knocking occurs based on a parameter transmitted from the sensor for determining whether the knocking occurs, and by controlling the oil pump based on whether the knocking occurs in the engine.