Integrated Antenna Module for Push Button Start Vehicles
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Solution Overview
Problem
The existing push button start systems for vehicles face challenges in emergency start scenarios where the fob's battery is discharged, requiring a fob holder that increases manufacturing costs, can be unreliable, and limits vehicle design flexibility due to the need for a specific insertion point.
Innovation Solution
An integrated antenna module that includes an immobilizer coil antenna and an LF antenna, integrated with a shielding guide to prevent magnetic field interference, allowing the fob to be authenticated and powered without a fob holder by being brought close to a specific location in the vehicle, enabling emergency starts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fob holder is provided for emergency start, then emergency start capability is achieved, but manufacturing cost increases and device complexity increases
Solution Approach 1:
The patent combines the immobilizer coil antenna and LF antenna into a single integrated antenna module. The immobilizer coil antenna serves dual purposes: it generates the magnetic field for transponder authentication during normal operation and provides power to the fob during emergency start. This merging eliminates the need for a separate fob holder structure, reducing device complexity while maintaining emergency start capability.
Solution Approach 2:
The integrated antenna module performs multiple functions: it authenticates the transponder during normal key operations and simultaneously serves as a power source for emergency start when the fob battery is discharged. The shielding guide also serves dual purposes by preventing magnetic field interference while providing structural support. This multi-functionality eliminates the need for dedicated emergency start hardware.
2Reliability
If a fob holder is provided for emergency start, then emergency start capability is achieved, but manufacturing cost increases
Solution Approach 1:
The patent integrates the immobilizer coil antenna and LF antenna into a single module, reducing the number of components that need to be manufactured and assembled. This consolidation eliminates the need for a separate fob holder structure, directly reducing manufacturing costs while maintaining emergency start functionality.
Solution Approach 2:
The integrated antenna module serves multiple functions including transponder authentication and emergency start power provision, eliminating the need for dedicated emergency start hardware. This multi-functionality reduces the bill of materials and assembly complexity, thereby reducing manufacturing costs.
3Reliability
If a fob holder is provided for emergency start, then emergency start capability is achieved, but vehicle design flexibility is limited
Solution Approach 1:
By merging the emergency start functionality into the existing integrated antenna module, the patent eliminates the need for a separate fob holder structure. This allows the antenna module to be positioned flexibly within the vehicle based on design requirements, enhancing vehicle design flexibility while maintaining emergency start capability.
Solution Approach 2:
The integrated antenna module performs both transponder authentication and emergency start functions, eliminating the need for dedicated emergency start hardware. This universality allows designers to place the module in various locations within the vehicle without adding extra components, thereby improving adaptability and design flexibility.
4Device complexity
If an integrated antenna module is used, then device complexity is reduced, but magnetic field interference between antennas occurs
Solution Approach 1:
The patent introduces a shielding guide as an intermediary element between the immobilizer coil antenna and the LF antenna. This shielding guide prevents magnetic field interference between the two antennas while allowing them to be integrated in a compact module. The shielding guide acts as a mediator that enables the integration benefit while blocking the harmful magnetic field interaction.
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
The integrated antenna module simplifies emergency starts by eliminating the need for a fob holder, reducing manufacturing costs, enhancing reliability, and providing design flexibility by allowing the fob to be authenticated and powered within a compact and adjustable module.
Implementation Method 1
an immobilizer coil antenna configured to generate an electric field to supply electrical power to a transponder in a fob
Implementation Method 2
a shielding guide, on which the immobilizer coil antenna is mounted, connected to the LF antenna to prevent magnetic field interference between the two antennas
Data Source
AI summary
The present invention provides an integrated antenna module for a push button start vehicle and an emergency start method using the same, which can perform a series of processes of starting a vehicle, such as power supply to a transponder, secret code authentication, start-up authorization, etc., when a driver simply brings the fob close to a specific location in the vehicle, without the use of the existing fob holder for an emergency start.