| 摘要 |
PURPOSE: A smart key system using three antennas and vehicle control method executed in a control unit of the system are provided to reduce cots by reducing wires between ECU(Electronic Control Unit) and antennas from 6 sets to 3 sets. CONSTITUTION: A smart key system using three antennas comprises an antenna unit(210) and control unit(220). The antenna unit is composed of a first, a second, and a third antennas(110,120,130). The first and second antennas are arranged in the center of a longitudinal direction of an inner roof. A part of the third antenna is overlapped with a communication range of the second antenna. The antenna unit covers an interior region and exterior region around a vehicle. The control unit decides whether a smart key(230) exists in the interior region of the vehicle or the exterior region around the vehicle. |
