Aftermarket Keyless Go System with Embedded OEM Remote
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Solution Overview
Problem
Users of vehicles with OEM remote systems face inconvenience and expense due to the need for an extra OEM remote for keyless entry and remote starting, as aftermarket providers must maintain system integrity by leaving an OEM remote inside the vehicle, which is costly and inconvenient.
Innovation Solution
A system that allows keyless entry and remote starting using a single device, such as a GSM phone or Bluetooth/WiFi-enabled device, which interacts with the embedded OEM remote to authenticate and enable/disable low-frequency communication, eliminating the need for an additional OEM remote.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an OEM remote is embedded inside the vehicle to maintain system integrity, then security is improved, but device complexity and cost increase due to requiring an additional OEM remote
Solution Approach 1:
The patent merges the functions of the embedded OEM remote and the user's portable device into a unified authentication system. The aftermarket keyless go system combines RFID reception, authentication processing, and LF transmission blocking capabilities into a single integrated system that works with the user's existing remote, eliminating the need for separate OEM and aftermarket remotes.
Solution Approach 2:
The user's portable device is made universal by enabling it to serve dual purposes: traditional RF remote starting functions and RFID-based keyless entry authentication. The system allows the single portable device to interact with both the aftermarket keyless go system and the embedded OEM remote through the unified authentication mechanism.
2Reliability
If an OEM remote is embedded inside the vehicle, then system integrity is maintained, but ease of operation deteriorates as users must carry an extra expensive FOB
Solution Approach 1:
The system merges the authentication functions of multiple remotes into a single portable device by integrating RFID capability with the user's existing remote starter. This combination allows the user to carry only one device while maintaining both traditional remote starting and keyless entry functions.
Solution Approach 2:
The portable device is enhanced with universal functionality to perform both traditional RF remote starting and new RFID-based keyless authentication. This multi-functional approach eliminates the need for users to carry separate OEM and aftermarket remotes, reducing burden while maintaining system integrity.
3Reliability
If low frequency transmissions are blocked when the vehicle is unlocked, then security is improved, but device complexity increases due to requiring LF transmitters and receivers
Solution Approach 1:
The system dynamically adjusts LF transmission blocking based on authentication state. During RFID authentication, LF transmissions are blocked to prevent unauthorized remote starting. After successful authentication and vehicle unlocking, the blocking is temporarily suspended to allow legitimate remote starting operations. This dynamic control is achieved through state-dependent logic in the aftermarket keyless go system.
Solution Approach 2:
The aftermarket keyless go system acts as an intermediary between the embedded OEM remote and the user's portable device. It mediates the authentication process by receiving RFID signals, verifying authentication, and controlling whether LF transmissions from the portable device can reach the embedded remote. This intermediary role simplifies the overall system architecture by centralizing security logic.
4Reliability
If encryption and spread-spectrum techniques are adopted, then security is improved, but device complexity and cost increase
Solution Approach 1:
The system uses RFID technology to create a digital copy of the authentication process. Instead of relying solely on complex encryption in RF transmissions, the system copies the authentication logic to the embedded OEM remote, which already contains secure authentication capabilities. The portable device emulates the authentication protocol, leveraging the embedded remote's existing security rather than implementing new complex encryption schemes.
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
Enables users to unlock, lock, and start their vehicles without carrying a separate OEM remote, reducing costs and complexity by allowing a single device to perform all functions, while maintaining security features.
Implementation Method 1
at least one LF transmitter, at least one LF receiver
Implementation Method 2
at least one HF transmitter and at least one HF receiver
Data Source
AI summary
A vehicle comprising a keyless go system, and at least one key fob, said keyless go system being operatively connected to a locking/unlocking subsystem and an engine start subsystem, said vehicle further comprising at least one LF transmitter, at least one LF receiver, at least one HF transmitter and at least one HF receiver, said vehicle further comprising an aftermarket keyless go system interfacing with said keyless go system, wherein at least one of said at least one key fob is embedded into said vehicle, and wherein when a user sends a lock/unlock command, or a start command with a portable device, said aftermarket keyless go system interacts with said embedded key fob to selectively enable and disable low frequency communication between said embedded key fob and said keyless go system.