Vehicle Control Device for Cabin Pre-Conditioning Power Management
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Solution Overview
Problem
During pre-air conditioning in electric vehicles, the combined use of an air conditioner and auxiliary heating devices often exceeds permissible electric power consumption, leading to insufficient cabin temperature improvement when the user enters the vehicle, resulting in reduced comfort.
Innovation Solution
A vehicle control device that prioritizes the operation of the air conditioner over auxiliary heating devices by stopping the auxiliary device when power consumption exceeds limits and restricting the air conditioner's compressor speed when auxiliary devices are not in use, ensuring continued pre-air conditioning and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the air conditioner and auxiliary device operate simultaneously during pre-air conditioning, then the temperature environment in the vehicle cabin is improved, but the consumed electric power exceeds the permissible electric power consumption value
Solution Approach 1:
The control device changes the operational parameters of the auxiliary device based on power consumption conditions. When the consumed electric power exceeds the permissible value, the control device stops the auxiliary device, thereby reducing power consumption while maintaining air conditioner operation to ensure cabin temperature improvement
2Use of energy by moving object
If the rotation speed of the electric compressor is reduced to reduce power consumption, then the consumed electric power is reduced, but the temperature in the vehicle cabin is not sufficiently improved
Solution Approach 1:
The control device dynamically adjusts the operation status of the auxiliary device based on real-time power consumption conditions. Instead of reducing compressor speed, the system maintains compressor operation at optimal levels and dynamically stops or restarts the auxiliary device to balance power consumption with cabin temperature requirements
3Use of energy by moving object
If the auxiliary device is stopped to reduce power consumption, then the consumed electric power is reduced, but the comfort in the vehicle cabin is reduced
Solution Approach 1:
The control device acts as an intermediary that manages the interaction between the air conditioner and auxiliary device. It prioritizes the air conditioner operation and uses the auxiliary device only when power consumption permits, thereby mediating between power conservation and comfort requirements
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 approach effectively improves the vehicle cabin temperature environment during pre-air conditioning, ensuring user comfort by prioritizing air conditioner operation over auxiliary heating, thereby reducing power consumption and preventing battery power depletion.
Implementation Method 1
an electric compressor that is operated by electric power from a battery
Implementation Method 2
a heat pump air conditioner
Implementation Method 3
an auxiliary device that is operated by the electric power from the battery and that is configured to directly apply heat to or remove heat from an occupant in the vehicle cabin
Data Source
AI summary
During pre-air conditioning in a vehicle cabin, when consumed electric power exceeds use permission electric power while an auxiliary heating device is operating, an operation of the auxiliary heating device is stopped. In contrast, when the consumed electric power exceeds the use permission electric power while the auxiliary heating device is not operating, a rotation speed of an electric compressor of an air conditioner is restricted. Therefore, the temperature environment in the vehicle cabin is improved by continuing the pre-air conditioning of the air conditioner while reducing the consumed electric power by stopping the operation of the auxiliary heating device.