Fluid Delivery System with Displacement Control for Constant Flow
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Solution Overview
Problem
Current hydraulic fluid delivery systems in heavy machines, such as hydraulic mining shovels, face inefficiencies and instability in maintaining a constant hydraulic flow rate due to varying engine speed and load, leading to operational delays and reduced efficiency.
Innovation Solution
A fluid delivery system comprising a pump, a valve module, and a displacement control module that maintains a constant flow rate by varying the pump's displacement based on engine speed, using a modulating valve and piston assembly to ensure consistent fluid flow to the motor, thereby stabilizing the HVAC system operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If load sense system with hydraulic lines is used to control HVAC system, then the system can operate the compressor unit, but the increased length of hydraulic lines causes delays and inefficiencies in maintaining uniform hydraulic flow rate
Solution Approach 1:
The patent extracts the flow control function from the traditional load sense system and implements it directly at the pump through a displacement control module. This eliminates the need for long hydraulic lines and complex load sensing circuitries, removing the source of delays while maintaining the ability to control HVAC system operation.
Solution Approach 2:
The displacement control module acts as an intermediary between the engine and the HVAC system, directly regulating pump displacement to maintain constant flow rate. This intermediary control mechanism eliminates the need for reactive load sensing through long hydraulic lines, providing immediate flow rate maintenance.
2Reliability
If traditional load sense system is used, then the HVAC system can be operated, but it faces challenges in maintaining stability with changing load and motor speed
Solution Approach 1:
The patent removes the complex load sensing circuitry from the system and replaces it with a displacement control module that directly manages pump output. This extraction of the control function simplifies the system while improving stability by providing direct control over flow rate regardless of load variations.
Solution Approach 2:
The displacement control module incorporates feedback mechanisms that monitor engine speed and adjust pump displacement accordingly. This feedback loop maintains constant flow rate to the motor even when load conditions change, ensuring HVAC system stability without complex external sensing circuitry.
3Adaptability or versatility
If engine speed varies, then the pump output flow rate changes, but this causes instability in motor speed and HVAC system operation
Solution Approach 1:
The patent implements a dynamic displacement control module that continuously adjusts pump displacement in response to engine speed variations. This dynamic adjustment maintains constant flow rate output despite changes in engine speed, ensuring stable motor operation and HVAC system performance across varying operational conditions.
Solution Approach 2:
The control module changes the physical parameter of pump displacement to compensate for engine speed variations. By varying the displacement parameter in real-time based on engine speed feedback, the system maintains consistent flow rate output, decoupling HVAC system stability from engine speed fluctuations.
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 system ensures a constant flow rate and stable operation of the HVAC system, reducing downtime and increasing the reliability and efficiency of the compressor unit, eliminating the need for complex load sensing circuitries and enhancing the overall performance and lifespan of the system.
Implementation Method 1
The pump is operatively coupled with an engine and is adapted to provide a flow of a fluid
Implementation Method 2
The valve module is provided in fluidic communication with the pump. The valve module is adapted to control the flow of the fluid
Implementation Method 3
The motor is provided in fluidic communication with the valve module and is adapted to receive the flow of the fluid and generate mechanical power
Implementation Method 4
The displacement control module is provided in fluidic communication with the pump and the valve module. The displacement control module is adapted to control a displacement of the pump for maintaining a constant flow rate of the fluid from the pump based, at least in part, on an engine speed
Data Source
AI summary
A fluid delivery system for an engine is disclosed. The fluid delivery system comprises a pump, a valve module, a motor, and a displacement control module. The pump is operatively coupled with an engine and is adapted to provide a flow of a fluid. The valve module is provided in fluidic communication with the pump to control the flow of the fluid. The motor is provided in fluidic communication with the valve module to receive the flow of the fluid and generate mechanical power. The displacement control module is provided in fluidic communication with the pump and the valve module and is provided downstream of the pump and upstream of the valve module. The displacement control module controls a displacement of the pump for maintaining a constant flow rate of the fluid from the pump based, at least in part, on an engine speed regardless of compressor load.