VEHICLE WIRELESS COMMUNICATION SYSTEM, VEHICLE CONTROL DEVICE, AND PORTABLE MACHINE

摘要

A portable machine has a signal receivable area in which, when the portable machine approaches one of a plurality of LF transmitters provided to a vehicle at a first distance, a response request signal only from the LF transmitter is receivable by the portable machine and when the portable machine approaches one of the plurality of LF transmitters at a second distance shorter than the first distance, response request signals from the LF transmitter and any of the remaining LF transmitters are receivable by the portable machine. If the portable machine receives the response request signal from only one of the LF transmitters within a predetermined time period and the response request signal has an RSSI value not less than a threshold, control (door locking/unlocking, engine start, and the like) to the vehicle is inhibited.

主权项

1. A vehicle wireless communication system configured to cause a vehicle control device mounted on a vehicle to control the vehicle in accordance with a wireless signal transmitted and received between the vehicle control device and a portable machine carried by a user,
the vehicle control device comprising: a first transmitter configured to transmit a response request signal to the portable machine; and a first receiver configured to receive a response signal from the portable machine; the portable machine comprising: a second receiver configured to receive the response request signal from the vehicle control device; a reception strength detector configured to detect reception strength of the response request signal received by the second receiver; and a second transmitter configured to transmit the response signal to the vehicle control device in reply to the response request signal received by the second receiver; wherein the first transmitter comprises a plurality of first transmitters to allow the response request signals to reach an area around the vehicle and an interior of a vehicle chamber, wherein the second receiver has a predetermined reception region in which the response request signals are receivable, wherein in the reception region, when the portable machine approaches one of the first transmitters at a predetermined first distance, the response request signal only from the first transmitter is receivable by the portable machine, and when the portable machine approaches one of the first transmitters at a predetermined second distance shorter than the first distance, the response request signals from the first transmitter and any of the remaining first transmitters are receivable by the portable machine, wherein control to the vehicle is inhibited if the second receiver receives the response request signal from only one of the first transmitters within a predetermined time period and the reception strength of the response request signal is not less than a preliminarily set threshold, and wherein control to the vehicle is permitted if the second receiver receives the response request signals from at least two of the first transmitters within the predetermined time period or if the second receiver receives the response request signal from only one of the first transmitters within the predetermined time period and the reception strength of the response request signal is less than the threshold.