Apparatus for remotely controlling a door locking state and theft prevention alarm state of an automobile

• US 5,648,764 A
• Filed: 07/31/1992
• Issued: 07/15/1997
• Est. Priority Date: 08/09/1989
• Status: Expired due to Term

• Current Assignee: Fujitsu Ten Limited (DENSO Corporation)
• Original Assignee: Fujitsu Ten Limited (DENSO Corporation)
• Inventors: Nose, Shinji, Enoki, Masahiko
• Primary Examiner(s): Holloway, III, Edwin C.
• Application Number:
  US07/921,618
• Time in Patent Office: 1,810 Days
• Field of Search: 340/825.32, 340/825.31, 340/825.69, 340/825.72, 340/426, 340/825.54, 307/10.2, 307/10.5, 361/172
• US Class Current: 340/5.3
• CPC Class Codes: G07C 2009/00261 the keyless data carrier having more than one function
• CPC Class Codes: G07C 2009/00293 anti-theft
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 2009/00849 programming by learning
• CPC Class Codes: G07C 2209/06 Involving synchronization or resynchronization between transmitter and receiver; reordering of codes
• CPC Class Codes: G07C 9/00182 operated with unidirectional data transmission between data carrier and locks

Abstract

An apparatus remotely controls, for example, door locking/unlocking and alarm activation of an automobile. A transmitting device transmits communication data, which includes synchronization data and identification data. The communication data is received by the control apparatus in which the identification data included in the received communication data is compared with already stored data. The locking and unlocking of the doors of the vehicle is carried out when the identification data matches the already stored data. A continuous reception condition is detected when the communication data is received for more than a predetermined period of time. When the continuous reception condition is detected, an alarm is actuated. As such, a common transmitting button of the transmitting device can be used to effect both control of the locking and unlocking of doors and alarm activation. The control apparatus may also include an erasable memory which is remotely settable in a writable status and in which identification data can be erased by remote control while in the writable status.

Claims

1. An apparatus for remotely controlling an automotive vehicle provided with a transmitting apparatus, having a transmission button, for repeatedly transmitting a communication data which includes a synchronization data and an identification data upon manipulation of the transmission button, and a theft preventing apparatus for controlling respective parts of the vehicle upon receipt of the communication data transmitted from the transmitting apparatus, said control apparatus comprising:

means for discriminating whether the synchronizing data and the identification data included in the received communication data respectively match prestored synchronizing data and prestored identification data stored in a memory in advance;

means for controlling a locking and unlocking of doors of the vehicle when the discrimination means discriminates that synchronizing data and the identification data respectively match the prestored synchronizing data and prestored identification data;

means for determining whether continuous reception of the communication data has been effected in which the communication data is continuously repeatedly received for more than a predetermined period of time; and

means for actuating an alarming theft prevention apparatus provided in the vehicle when the determining means determines that the continuous reception has been effected,

the determining means setting a respective determination basis for each of the synchronization data and the identification data, each determination basis defining a degree of coincidence between received and prestored data, repeatedly comparing the synchronization data and the identification data included in the communication data with the prestored synchronization data and the prestored identification data, respectively, and determining that the continuous reception of the communication data has been effected when the determination basis of the synchronization data and the determination basis of the identification data are each satisfied during the predetermined period of time.