Wireless Underhood Siren for Vehicle Security
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Solution Overview
Problem
Current vehicle control systems face challenges in improving security and convenience features, facilitating field installation, enhancing resistance to tampering, and ensuring reliable operation, particularly in signaling alarms when tampering occurs.
Innovation Solution
An aftermarket vehicle siren system is installed under the hood, equipped with a sound generator, backup battery, Bluetooth transceiver, and engine computer interface, enabling communication with the vehicle control system in the passenger compartment to monitor engine RPM and hood status, triggering alarms and remote start operations as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired connections are used to connect underhood components to the vehicle control system, then system reliability is improved, but installation complexity and time increase
Solution Approach 1:
The patent replaces wired mechanical connections with wireless communication technology. The underhood components (siren, hood sensor, RPM sensor) communicate with the vehicle control system via wireless signals, eliminating the need for physical wire routing between engine compartment and passenger compartment. This substitution maintains communication reliability while dramatically simplifying installation procedures.
2Reliability
If wired connections are run from engine compartment to passenger compartment, then communication reliability is improved, but installation time and difficulty increase
Solution Approach 1:
Wireless communication technology replaces the mechanical wiring system that would normally connect the engine compartment to the passenger compartment. This eliminates hours of wire routing, connection, and testing work while maintaining reliable data transmission for security and monitoring functions.
3Use of energy by moving object
If the vehicle battery is used to power the siren, then power availability is improved, but system vulnerability to battery disablement increases
Solution Approach 1:
The patent incorporates a backup battery specifically designed to cushion against the failure or disablement of the main vehicle battery. This secondary power source is charged in advance and automatically activates when the primary battery is unavailable, ensuring the siren and other underhood components remain operational even when the main battery is disconnected or failed.
4Ease of operation
If wireless communication is used between underhood components and vehicle control system, then installation ease is improved, but communication reliability may worsen
Solution Approach 1:
The patent employs wireless communication technology to replace physical wiring, achieving ease of installation while maintaining communication reliability through robust signal protocols and error handling mechanisms designed for automotive environments.
Data Source
AI summary
A vehicle control system (VCS) in a passenger compartment interfaces with underhood components using a Bluetooth® link. The underhood components include a siren assembly with a sound generator and backup battery. The battery enables the siren assembly to function after the vehicle's battery is disabled. The siren assembly includes a Bluetooth® transceiver for establishing the link with the VCS. The siren assembly monitors the hood of the vehicle through a hood sensor, to detect unauthorized opening. In response to such opening, the siren assembly transmits an alarm to the VCS, which transmits an alarm to a user's mobile device and/or a security service. The sound generator may also be activated, by itself or under control of the VCS. The siren assembly connects to the engine computer/ignition module, to allow the VCS to monitor engine speed, and facilitate proper start of the engine when the VCS receives a remote start command.