Vehicle Control Device Cooling Priority Mode
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Solution Overview
Problem
In vehicle air-conditioning systems, the discharge of heat from a refrigerant to cooling water for strong electrical equipment becomes insufficient when the temperature of the cooling water rises, leading to a decrease in cooling capacity and air-conditioning performance.
Innovation Solution
A vehicle control device that switches from a normal control mode to a cooling priority control mode by adjusting the output of the motor and engine, increasing the engine output and reducing the motor output, and optimizing the water pump's circulation to maintain effective heat discharge and refrigerant cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the motor output is increased to provide more cooling capacity, then the cooling performance improves, but the heat generated by the motor increases the cooling water temperature, reducing heat discharge efficiency
Solution Approach 1:
The system dynamically switches between motor-driven cooling mode and engine-driven cooling mode based on real-time temperature conditions. When cooling water temperature exceeds a predetermined threshold, the system transitions from motor output to engine output, enabling adaptive response to thermal conditions and resolving the contradiction between cooling capacity and heat discharge efficiency
Solution Approach 2:
The system changes the operating parameters by switching the power source (from motor to engine) and adjusting water pump output based on temperature conditions. This parameter change allows the system to operate in different modes optimized for different thermal conditions, maintaining effective heat discharge while providing sufficient cooling capacity
2Temperature
If the water pump output is increased to improve heat discharge, then the refrigerant cooling efficiency improves, but the energy consumption increases
Solution Approach 1:
The water pump output is dynamically adjusted based on temperature conditions. When cooling water temperature is within the normal range, the pump operates at standard output. When temperature exceeds the threshold and the system switches to engine-driven mode, the pump output is increased to maximize heat discharge efficiency, thereby optimizing energy consumption relative to the cooling need
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 solution maintains air-conditioning performance by ensuring sufficient heat discharge from the refrigerant to the cooling water, preventing a drop in cooling capacity and ensuring reliable cooling of the passenger compartment.
Implementation Method 1
a water cooling condenser exchanging heat between a refrigerant for air-conditioning use and cooling water for water cooling use cooling strong electrical equipment
Data Source
AI summary
A vehicle control device 40 of a vehicle 200 provided with a cooling circuit 20 using a circulating cooling liquid to cool motors 112, 114 for driving a vehicle or a PCU 118 and a refrigerant circuit 30 discharging heat of the circulating refrigerant for air-conditioning a passenger compartment to the cooling liquid of the cooling circuit 20 and driven by jointly using the outputs of the motors 112, 114 and the output of an engine 12, which control device comprising a cooling mode switching part 42 switching a cooling mode from a normal control mode to a cooling priority control mode cooling the passenger compartment with priority when a predetermined condition stands and a vehicle control part 43 making the outputs of the motors 112, 114 decrease and making the output of the engine 12 increase when the normal control mode is switched to the cooling priority control mode.