Engine Coolant Pump Speed Control for Backpressure Compensation
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Solution Overview
Problem
Existing engine coolant systems in vehicles with internal combustion engines face challenges in efficiently managing coolant flow and backpressure, which can lead to excessive heating and reduced engine component lifespan.
Innovation Solution
A coolant control system that includes a target speed module for determining the engine coolant pump's target speed, a speed adjustment module that adjusts based on valve position and backpressure, and a speed control module that controls electrical power to achieve an adjusted target speed, thereby optimizing coolant flow and compensating for backpressure variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the coolant pump speed is increased to improve cooling efficiency, then heat dissipation improves, but energy consumption increases
Solution Approach 1:
The patent implements dynamic coolant pump speed control that adjusts pump operation based on real-time engine temperature, coolant flow requirements, and backpressure conditions. The controller continuously modifies pump speed rather than maintaining a fixed high speed, optimizing the balance between cooling efficiency and energy consumption.
Solution Approach 2:
The system changes operational parameters (pump speed, flow rate) based on detected backpressure and temperature conditions. When backpressure is high, the system adjusts pump speed to maintain effective coolant circulation while minimizing unnecessary energy expenditure.
2Reliability
If the coolant pump speed is increased to compensate for high backpressure, then coolant flow improves, but system complexity increases
Solution Approach 1:
The patent employs a feedback control system where a sensor detects backpressure conditions and temperature, and the controller uses this information to automatically adjust pump speed. This closed-loop feedback mechanism maintains reliable coolant circulation while using a relatively simple control architecture that processes sensor data and modifies pump operation accordingly.
3Measurement precision
If valve position is monitored to adjust pump speed, then cooling precision improves, but measurement precision requirements increase
Solution Approach 1:
The system uses an intermediary approach where rather than directly measuring valve position with high-precision sensors, the controller infers backpressure conditions from coolant flow characteristics and temperature data. This indirect measurement method achieves the necessary control precision while avoiding the complexity of direct high-precision valve position sensing.
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
This system effectively manages coolant flow and backpressure, enhancing engine cooling efficiency and extending the lifespan of engine components by ensuring optimal coolant circulation and heat transfer.
Implementation Method 1
The engine coolant absorbs heat from the engine and carries the heat to the radiator
Implementation Method 2
The radiator transfers heat from the engine coolant to air passing the radiator
Data Source
AI summary
A target speed module determines a target speed of an engine coolant pump of the vehicle. A speed adjustment module determines a speed adjustment based on a position of a valve, wherein a backpressure of the engine coolant pump changes when the position of the valve changes. An adjusted target speed module determines an adjusted target speed for the engine coolant pump based on the target speed and the speed adjustment. A speed control module controls a speed of the engine coolant pump based on the adjusted target speed.