Cooling System Vent Line Upstream Pump
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Solution Overview
Problem
Existing cooling systems for motor vehicles experience significant flow losses due to the use of Venturi nozzles for venting, which generate negative pressure to remove gas from heat exchangers, leading to inefficiencies in coolant flow and heat transfer.
Innovation Solution
The cooling system design eliminates the Venturi nozzle by positioning the section where the second ventilation line connects to the coolant line upstream of the coolant pump, ensuring a constant flow cross-sectional area, allowing the pump's suction effect to effectively vent the heat exchanger without flow losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a Venturi nozzle is used to generate vacuum for venting gas from the heat exchanger, then gas removal capability is improved, but flow losses increase significantly
Solution Approach 1:
The patent extracts the venting function from the Venturi nozzle by opening the vent line directly into the suction line upstream of the coolant pump. This separates the gas removal function from the flow-constraining Venturi structure, eliminating flow losses while maintaining effective vacuum generation for gas extraction from the heat exchanger
Solution Approach 2:
The suction line upstream of the coolant pump serves as an intermediary medium that provides the necessary vacuum for venting. By utilizing the existing negative pressure in the suction line as a mediator, the system achieves effective gas removal without requiring the additional flow restrictions imposed by a Venturi nozzle
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 configuration minimizes flow losses and maintains effective venting of the heat exchanger, enhancing the cooling system's efficiency and reducing the risk of coolant flow disruptions, thereby improving the overall cooling performance.
Implementation Method 1
a section 9c of the coolant line 9, into which the second vent line 17 opens, is arranged upstream of the coolant pump 6 with respect to the defined delivery direction
Data Source
Figure 1
Figure 2
AI summary
A cooling system 4 for a motor vehicle is provided, comprising at least one cooling circuit 10, into which at least one coolant pump 6 for pumping a liquid coolant 12 in a defined direction within the cooling circuit 10 and a heat exchanger 7 are integrated. The coolant pump 6 and the heat exchanger 7 are connected to each other directly and/or indirectly via coolant lines 9 to form the cooling circuit 10. A first vent line 15 branches off from the cooling circuit 10 and leads to an expansion tank 11 of the cooling system 4, and a second vent line 17 connects the heat exchanger 7 to a section of one of the coolant lines 9. Furthermore, this section of the coolant line 9, into which the second vent line 17 opens, is arranged upstream of the coolant pump 6 with respect to the defined direction of flow and has a constant flow cross-sectional area.Consequently, this section, into which the second vent line opens, should not be designed as a Venturi nozzle, so that flow losses that would occur when the liquid coolant flows through such a Venturi nozzle can be avoided.