Keyless Go Control Unit Architecture Using Shared Radio Antenna
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Solution Overview
Problem
Existing keyless go systems require multiple radio antennas and complex hardware changes, making them costly and inefficient, especially when retrofitting keyless entry functionality to vehicles.
Innovation Solution
A system architecture that utilizes a single radio antenna shared between basic and keyless go equipment variants, with a data line connecting the radio receiver to the control unit and a CAN data bus networking the keyless go control unit with other control units, allowing for simplified hardware and software modifications to implement keyless go functionality without additional antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a keyless go system is implemented using prior art approaches, then keyless entry functionality is achieved, but multiple radio antennas and complex hardware changes are required
Solution Approach 1:
The existing radio receiver and antenna infrastructure is made multi-functional by enabling it to serve both traditional remote key functions and keyless go functions. The control unit is enhanced to handle both conventional remote signals and passive keyless entry signals, eliminating the need for separate dedicated hardware for keyless go functionality.
Solution Approach 2:
The patent merges the keyless go control functionality into the existing control unit rather than implementing it as a separate system. The radio receiver, antenna, and control unit are integrated to work together for both traditional and keyless entry modes, consolidating hardware resources and reducing overall system complexity.
2Adaptability or versatility
If keyless go system is retrofitted to existing vehicles, then keyless entry capability is added, but major component changes and additional antennas are needed
Solution Approach 1:
The system is designed with dynamic configurability where the control unit can adapt its operation mode based on the presence and type of key fob. The system dynamically switches between traditional remote activation and passive keyless detection modes, allowing flexible deployment in both new and retrofitted vehicles without fixed hardware constraints.
Solution Approach 2:
The patent utilizes the pre-existing radio receiver and antenna infrastructure in vehicles before implementing keyless go functionality. By preparing and configuring the existing control unit to handle keyless protocols, the system leverages already-installed components, significantly reducing retrofit complexity and avoiding the need for additional antenna installations.
3Reliability
If additional radio receivers are installed for keyless go, then authorization reliability is improved, but system cost and complexity increase
Solution Approach 1:
The existing radio receiver performs dual duties by handling both traditional remote key communication and passive keyless go authorization. The control unit processes signals from the existing receiver infrastructure, enabling the system to serve itself without requiring additional dedicated receivers for keyless functionality, thereby maintaining reliability while avoiding increased complexity.
Data Source
Figure 1~2
AI summary
The system architecture has a keyless-go-control device, which is provided with keyless-go-system in addition with variants of a transport device. The transport device is connected over a data link (5) with a radio receiver (1) and is provided in addition to a data bus between control unit (3,4) and the keyless-go-control device. The keyless-go-control device receives the keyless-go-passwords by the variants with keyless-go in a keyless-go-message and accepts the controlling of the keyless-go-function. The keyless-go-control device is not integrated with the variants in the transport device.