Title:
VEHICLE KEY DEVICE, VEHICLE ENGINE START CONTROL METHOD AND VEHICLE KEY SYSTEM
Document Type and Number:
Japanese Patent JP3244023
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To accurately send and receive second signals.
SOLUTION: An ignition key 10 is provided with a transmission circuit 28 to transmit wireless SW signals through radiowave when switches 16 and 18 are turned on and a transponder 30 which receives power from an antenna coil 74 provided in an ignition key cylinder 12 of a vehicle and, when it receives the power, transmits transponder code signals. When the ignition key 10 is inserted into the ignition key cylinder 12, a LED 22 installed in the ignition key cylinder 12 emits light. When the light is received by a photo diode 32 installed in the transmission circuit 28, the transmission of the wireless SW signals is prohibited.
Inventors:
Keiji Yamamoto
Masao Ohmura
Masao Ohmura
Application Number:
JP16310597A
Publication Date:
January 07, 2002
Filing Date:
June 19, 1997
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
B60R25/04; B60R25/24; B60R25/40; E05B81/64; E05B83/00; E05B49/00; E05B83/36; F02N15/00; (IPC1-7): B60R25/04; E05B49/00; E05B65/20; F02N15/00
Other References:
【文献】独国特許発明19539852(DE,C2)
【文献】独国特許出願公開19539851(DE,A1)
【文献】独国特許出願公開19539851(DE,A1)
Attorney, Agent or Firm:
Atsushi Nakajima (3 outside)