Variable Coolant Flow Paths for EGR and Engine Thermal Management
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Solution Overview
Problem
Existing EGR cooling systems can negatively impact engine operations and fuel efficiency by affecting engine temperatures, leading to inefficient engine performance and other undesirable effects.
Innovation Solution
A cooling system with variable coolant flow paths that includes a coolant pump and a plumbing system with multiple branches, allowing for configuration changes between series and parallel connections to optimize coolant flow for efficient cooling of the engine and EGR system components, thereby minimizing negative impacts on engine operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the EGR cooling system operates continuously to cool EGR components, then EGR component temperature is reduced, but engine operating temperature deteriorates leading to inefficient engine operation and degraded fuel efficiency
Solution Approach 1:
The cooling system dynamically switches between series and parallel configurations based on operating conditions. The system uses flow control devices to adjust coolant distribution, enabling adaptive cooling that optimizes both EGR component temperature control and engine efficiency under different operating conditions
Solution Approach 2:
The cooling system is divided into separate controllable branches - an engine cooling branch and an EGR cooling branch. This segmentation allows independent control of coolant flow to each branch, enabling the system to prioritize engine cooling or EGR cooling based on current operational requirements without compromising overall system performance
2Productivity
If coolant flow is directed through the engine to maintain engine temperature, then engine operation efficiency is maintained, but EGR component cooling is insufficient
Solution Approach 1:
The system dynamically adjusts the coolant flow distribution between engine and EGR branches using flow control devices. When EGR cooling demand is high, the system increases coolant allocation to the EGR branch while maintaining adequate engine cooling, achieving balanced thermal management under varying load conditions
3Adaptability or versatility
If a fixed cooling configuration is used, then system complexity is reduced, but the system cannot adapt to different operating conditions optimizing both engine and EGR cooling
Solution Approach 1:
The cooling system incorporates dynamic flow control capabilities through valves and flow control devices that can adjust coolant distribution in real-time. This dynamic configuration allows the system to adapt to different operating conditions (idle, acceleration, steady-state, high load) while managing complexity through electronic control integration
Solution Approach 2:
The cooling system is designed with multi-functionality, where the same coolant circulation system serves both engine cooling and EGR cooling purposes. By implementing a universal cooling architecture with adjustable flow distribution, the system achieves versatile adaptability without requiring separate dedicated cooling loops for each function
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 effectively cools EGR system components without compromising engine efficiency, allowing for adaptive operation based on temperature conditions to enhance overall vehicle performance.
Implementation Method 1
coolant flows to cool the engine... coolant flows to cool the EGR component
Implementation Method 2
circulate coolant pumped by the coolant pump through the cooling system
Data Source
AI summary
A cooling system selectively cools an engine and an exhaust gas recirculation (EGR) component of the engine. The cooling system includes a plumbing system with a plurality of flow branches, including an engine branch, an EGR branch, and a feed branch. The engine branch defines an engine flow passage through which the coolant flows to cool the engine. The EGR branch defines an EGR flow passage through which the coolant flows to cool the EGR component. The feed branch defines a feed flow passage. The cooling system has a first operating configuration in which the EGR flow passage is configured to receive coolant flow from the engine flow passage. The cooling system has a second operating configuration in which the EGR flow passage is configured to receive coolant flow from the feed flow passage instead of the engine flow passage.