Vehicular remote locking/unlocking system

• US 6,980,082 B2
• Filed: 10/08/2003
• Issued: 12/27/2005
• Est. Priority Date: 10/08/2002
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company), Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company), Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Hayashi, Naoki, Ueda, Shinichi, Yoshimura, Kentaro, Sueoka, Kazuhiko, Sawada, Kenichi, Kamikura, Akira, Asakura, Suguru, Arie, Shinichi
• Primary Examiner(s): Zimmerman, Brian
• Assistant Examiner(s): YANG, CLARA I
• Application Number:
  US10/680,405
• Publication Number:
  US 20040130462A1
• Time in Patent Office: 811 Days
• Field of Search: 340/5.72, 340/5.61, 340/825.69, 340/528.72, 340/426.16, 307/10.1, 307/10.2
• US Class Current: 340/5.72
• CPC Class Codes: G07C 2009/00357 and the lock having more than one limited data transmission ranges
• CPC Class Codes: G07C 2209/63 Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks

Abstract

In a vehicular remote locking/unlocking system, when a locking or unlocking switch outputs a trigger signal, a second transmission device transmits identification information transmission disable signal, before a first transmission device transmits identification information request signal. When a portable device of the vehicular remote system receives the transmission disable signal, even if the portable device receives a subsequent request signal, transmission of identification information from the portable device is disabled for a predetermined period of time, thereby disabling operation of a door lock actuator. Since the second transmission device transmits a transmission disable signal a plurality of times in succession, the influence of noise is eliminated, thereby reliably preventing the portable transceiver within the vehicle from outputting an ID signal.

Claims

1. A vehicular remote locking/unlocking system comprising:

first transmission means provided in a vehicle, for transmitting a request signal to a predetermined area outside the vehicle, the request signal requesting transmission of identification information;

second transmission means provided in the vehicle, for transmitting a transmission disable signal to a predetermined area within the vehicle, the transmission disable signal disabling transmission of identification information for a predetermined period of time;

a portable device which transmits identification information upon receiving the request signal;

receiving means provided in the vehicle, for receiving the identification information from the portable device;

trigger means provided in the vehicle, for outputting a trigger signal initiating operation of the first and second transmission means when the trigger means is operated by a vehicle user; and

locking/unlocking means for carrying out locking/unlocking of an opening member of the vehicle when the identification information received by the receiving means matches identification information stored on the vehicle side,

wherein when the trigger means outputs the trigger signal, before the first transmission means transmits the request signal, the second transmission means transmits the transmission disable signal a plurality of times in succession and disables transmission of the identification information from the portable device for a predetermined period of time, and operation of the locking/unlocking means is disabled when the portable device is located within the vehicle.

2. The vehicular remote locking/unlocking system according to claim 1, wherein when the receiving means receives the identification information matching the identification information stored on the vehicle side from the portable device, after the second transmission means re-transmits the transmission disable signal, the first transmission means transmits a secondary request signal containing the identification information;

wherein when the portable device is not in a state in which transmission is disabled and the identification information contained in the secondary request signal received by the portable device is its own identification information, the portable device re-transmits the identification information; and

wherein when the identification information received by the receiving means successively matches the identification information stored on the vehicle side, the locking/unlocking means carries out locking/unlocking of the opening member of the vehicle.