Patent ID: 9536365
Date: 2017-01-03
CPC Classifications: B60R,G07C,G08C

Claim:
1. A vehicle comprising a keyless go system, and at least one OEM 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 and first and second LF transmitting antennae, said vehicle further comprising an aftermarket keyless go system interfacing with said keyless go system, wherein the keyless go system is configured to transmit signal from each antenna in sequence separated by a certain time interval with a higher and lower power levels, respectively, wherein the second LF antenna with the lower power level will only get a response if the OEM key fob is inside the vehicle, and the first antenna with a higher power level will get a response if the OEM key fob is outside the vehicle, and, by analyzing the response signals to the sequential signals, to determine whether the OEM key fob is inside the vehicle or outside the vehicle, said aftermarket keyless go system being adapted to communicate with a portable device that is different from said OEM key fob, wherein at least one of said at least one OEM key fob is embedded into said vehicle, and wherein the keyless go system is further configured to, when a user unlocks the vehicle with the portable device, to enable the OEM key fob when the user uses a predetermined sequence of button presses on the portable device, whereby the vehicle recognize that the OEM key fob is inside the vehicle and allow the user to start the vehicle, wherein when a user sends a lock/unlock command with said portable device, said lock command is received by said aftermarket keyless go system, such that said aftermarket keyless go system subsequently interacts with said embedded OEM key fob to selectively enable and disable low frequency communication between said embedded OEM key fob and said keyless go system, such that said user is free from being required to carry another of said at least one OEM key fob simultaneously with said portable device.