Vehicle Electrical System Wireless Control Signal Transmission
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Solution Overview
Problem
Conventional vehicle electrical systems face challenges in downsizing and efficiently supplying power to sliding doors, particularly when the door is open, and suffer from reduced power supply efficiency due to the use of capacitors and electromagnetic induction.
Innovation Solution
A vehicle electrical system that includes a wire harness with a power supply line for wired power delivery and a wireless transmission/reception unit for control signals, with the first transmission/reception unit mounted on the vehicle and the second on the sliding door, allowing reliable power supply to the sliding door at all times without capacitors and reducing cable size by wireless communication of control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If electromagnetic induction is used to supply power wirelessly, then cable size is reduced, but power supply efficiency deteriorates
Solution Approach 1:
The system segments power supply and control signal transmission into separate channels: power is supplied through wired connection (power supply line) while control signals are transmitted wirelessly. This segmentation allows each channel to be optimized independently, maintaining high power supply efficiency while reducing cable requirements for control signals.
Solution Approach 2:
The system replaces wireless electromagnetic induction with wired power supply for the power delivery channel, ensuring high efficiency. Meanwhile, it applies wireless communication (electromagnetic waves) to the control signal channel, substituting physical cable connections with electromagnetic transmission for control purposes.
2Adaptability or versatility
If a capacitor is used to supply power when the door is open, then power can be supplied in all states, but device complexity increases
Solution Approach 1:
The system dynamically adapts the power supply mode based on door state: when the door is closed, power is supplied through the power supply line; when the door is open, the capacitor automatically supplies power. This dynamic switching eliminates the need for complex manual control while ensuring continuous power availability.
Solution Approach 2:
The capacitor is automatically charged from the power supply line when the door is closed and automatically discharges to supply power when the door is open, without requiring external control. This self-service mechanism simplifies the overall system by eliminating the need for complex power management control circuits.
3Volume of moving object
If all control signals are transmitted wirelessly, then cable size is reduced, but signal reliability deteriorates
Solution Approach 1:
The system applies different transmission qualities to different signal types: critical safety control signals are transmitted through wired connections (power supply line) ensuring high reliability, while non-critical control signals are transmitted wirelessly. This local quality differentiation optimizes both reliability and cable reduction.
Solution Approach 2:
The system changes the transmission parameter (wired vs. wireless) based on the importance of the control signal. Safety-critical signals use wired transmission with higher reliability, while general control signals use wireless transmission to reduce cable size, optimizing the overall system performance.
Data Source
AI summary
A vehicle electrical system includes a wire harness routed between a sliding door opening/closing an opening of a vehicle and the vehicle, and including at least a power supply line for supplying power; and a transmission/reception unit that transmits/receives at least a portion of control signals between the vehicle and the sliding door. The transmission/reception unit includes a first transmission/reception unit mounted to the vehicle and a second transmission/reception unit mounted to the sliding door. The first transmission/reception unit and the second transmission/reception unit wirelessly communicates with each other.