Variable Displacement Pump Pressure Regulation via Dual Decrease Ports
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Solution Overview
Problem
Current oil pump technologies lack control over discharge pressure, providing high pressure at all engine conditions, even when lower pressure is sufficient, which can be inefficient and wasteful.
Innovation Solution
A variable displacement pump system with a housing, actuator member, and solenoid valve that controls fluid flow through separate decrease ports to adjust pressure applied to an eccentric ring, allowing for precise control of flow rate and pressure based on engine needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed pressure regulation system is used in oil pumps, then the pump provides high oil pressure at all engine operating conditions, but this results in energy waste when lower pressure would be sufficient
Solution Approach 1:
The patent applies dynamics by making the pump's displacement variable rather than fixed. The actuator member adjusts the pump elements' displacement based on operating conditions, allowing the pump to deliver appropriate pressure and flow dynamically. This resolves the contradiction by enabling high pressure when needed while reducing pressure and flow when lower levels suffice, thereby maintaining reliability while reducing energy waste.
Solution Approach 2:
The patent changes the parameter of pump displacement from fixed to variable. By adjusting the displacement parameter based on engine operating conditions through the actuator member and pressure regulation mechanism, the system can optimize energy consumption while ensuring adequate oil pressure supply. This directly addresses the contradiction by allowing pressure adaptation to actual demands.
2Ease of operation
If a variable displacement pump system with actuator member and decrease ports is implemented, then precise control of flow rate and pressure is achieved, but the device complexity increases
Solution Approach 1:
The patent segments the pressure control function into multiple components: the actuator member, first decrease port, second decrease port, and valve. This segmentation allows each component to perform a specific function in the pressure regulation process, making the overall system more manageable and controllable despite the increased complexity. The segmented approach enables precise pressure control through coordinated action of individual components.
Solution Approach 2:
The actuator member serves as an intermediary between the valve and the pump elements. It translates valve positioning into actuation forces that adjust the pump's displacement. This intermediary mechanism enables precise control of flow rate and pressure while providing a clear control pathway, balancing the need for ease of operation with the inherent complexity of the variable displacement system.
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
Enables optimized engine oil pressure control by adjusting flow rate and pressure according to engine operating conditions, reducing energy consumption and wear by matching pressure to specific demands.
Implementation Method 1
A valve is connected to the second decrease port for controlling the flow of fluid to the second decrease port
Implementation Method 2
A first decrease port is connected to the housing and has a surface area in operable contact with the actuator member. A second decrease port is connected to the housing and has a surface area that is operable contact with the actuator member
Data Source
AI summary
A pump having a housing with an actuator member positioned inside for controlling the flow generated by the pump. A first decrease port is connected to the housing and has a surface area in operable contact with the actuator member. A second decrease port is connected to the housing and has a surface area that is operable contact with the actuator member. A valve is connected to the second decrease port for controlling the flow of fluid to the second decrease port. A suction passage is connected to the housing and drawings fluid to the housing using the actuator member. A discharge passage is connected to the housing so that fluid providing an exit for fluid that has been pressurized by the actuator member.