EV Air Conditioning Blend Door Control in FATC OFF State
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Solution Overview
Problem
Conventional air conditioning systems in electrified vehicles cannot effectively control the blend door when the full automatic temperature control (FATC) is in an OFF state, leading to potential temperature discrepancies between driver preferences and actual air output, and lack preemptive battery temperature control.
Innovation Solution
An air conditioning control apparatus and method that automatically controls the blend door based on environmental and indoor conditions, even when the air conditioning system is deactivated, by using a processor to determine the operation mode of the blend door and ventilation holes, incorporating artificial intelligence and user preferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the air conditioning control apparatus is deactivated (OFF state), then energy consumption is reduced, but the blend door cannot be controlled leading to temperature discrepancies
Solution Approach 1:
The system performs preliminary action by controlling the blend door in advance before the air conditioning apparatus is fully activated. The processor determines the appropriate blend door position based on indoor temperature and preset temperature requirements, ensuring temperature control is maintained even when the system appears to be in OFF state. This preliminary control prevents temperature discrepancies from developing.
Solution Approach 2:
The system implements self-service by autonomously managing the blend door position based on temperature sensors and preset parameters. When the air conditioning control apparatus is deactivated, the processor continues to monitor indoor temperature and automatically adjusts the blend door to maintain appropriate temperature conditions without requiring user intervention or full system activation.
2Productivity
If the blend door position is fixed in high or low temperature modes, then the air conditioning system operates efficiently, but hot or cold air different from driver request may be introduced when FATC is OFF
Solution Approach 1:
The system applies dynamics by making the blend door position adjustable and adaptive rather than fixed. The processor dynamically determines the blend door position based on real-time indoor temperature measurements and preset temperature requirements. This dynamic control allows the system to adapt to different driving conditions and temperature preferences even when the air conditioning control apparatus is in OFF state, eliminating the rigidity of fixed high/low temperature modes.
3Loss of energy
If the battery temperature control waits for set temperature thresholds, then the cooling/heating system operates only when necessary, but preemptive temperature control is not possible
Solution Approach 1:
The system performs preliminary action by controlling battery temperature in advance before threshold temperatures are reached. The processor monitors battery temperature continuously and activates the cooling or heating system preemptively when temperature trends indicate approaching threshold conditions. This preliminary intervention prevents extreme temperature deviations, reducing the need for intensive cooling/heating operations and improving battery performance before problems arise.
Data Source
AI summary
An air conditioning control apparatus and method for an electrified vehicle includes a processor configured to automatically switch to an outdoor mode when a replacement battery is mounted in a state in which the air conditioning control apparatus is deactivated and then to determine an operation mode of a blend door depending on an indoor temperature and a preset temperature in the vehicle; and a storage connected to the processor and configured to store data and algorithms driven by the processor.