Variable Delivery Pump Cooling Circuit for Motor Vehicle
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Solution Overview
Problem
Existing cooling systems for motor vehicles, particularly electric vehicles, face inefficiencies in pump operation and energy consumption, leading to inadequate temperature control and potential damage from overheating, as they rely on constant flow rates that do not adapt effectively to changing conditions.
Innovation Solution
A cooling device with a command system that adjusts the flow rate of liquid coolant pumps based on real-time temperature measurements, vehicle speed, thermal losses, and external conditions, using a proportional-integral corrector and internal models to maintain a set point temperature, ensuring optimal pump operation and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If constant flow rate pumps are used in cooling systems, then the system structure is simple, but energy consumption increases and temperature control precision deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from constant flow rate pumps to variable flow rate pumps that can dynamically adjust their operation based on real-time temperature conditions. The command system continuously monitors temperatures of the power train components and adjusts pump flow rates accordingly, optimizing energy consumption while maintaining effective cooling.
Solution Approach 2:
The patent implements feedback through a command system that receives temperature information from sensors monitoring the power train components. This feedback loop allows the system to adjust pump flow rates based on actual thermal conditions, preventing both energy waste from excessive cooling and overheating from insufficient cooling.
2Reliability
If variable flow rate pumps with command systems are used, then energy consumption is reduced and temperature control is improved, but device complexity increases
Solution Approach 1:
The command system is designed to be multi-functional, managing multiple pumps and cooling circuits simultaneously. It can control different pumps for different power train components (electric machine, inverter, battery) using a unified control architecture, which reduces overall system complexity despite the advanced control capabilities.
Solution Approach 2:
The cooling system incorporates self-service through automatic temperature monitoring and pump control. The command system autonomously adjusts flow rates based on sensor inputs without requiring manual intervention, and the system can detect and respond to thermal conditions independently, reducing the need for complex external control mechanisms.
3Temperature
If flow rate is increased to prevent overheating, then temperature control improves, but energy consumption increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the flow rate parameter of the coolant based on real-time temperature conditions. The command system modifies pump operation parameters (flow rate) according to the thermal state of power train components, ensuring optimal cooling efficiency while minimizing energy consumption.
Solution Approach 2:
The system implements partial action by providing cooling only when and where needed. Instead of continuously running pumps at high flow rates, the command system activates and adjusts pump flow rates based on actual thermal requirements, avoiding excessive cooling action that would waste energy.
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 maintains a stable coolant temperature, reducing energy consumption and preventing overheating by dynamically adjusting flow rates, thus enhancing the safety and efficiency of the cooling process.
Implementation Method 1
a cooling circuit capable of cooling an engine unit using a liquid coolant
Implementation Method 2
a radiator, which is a heat exchanger used to cool the liquid
Data Source
AI summary
A cooling device for a motor vehicle, including a cooling circuit configured to cool an engine assembly using a liquid coolant circulated by at least one variable delivery pump, the delivery output by each pump being controlled by a control system. The control system is configured to regulate the delivery of each pump so that the temperature of the liquid coolant does not exceed a fixed datum temperature.