Patent
Method for detecting portable transmitter left inside vehicle
Peter Paeschke,Walter Weishaupt +1 more
- 14 Jul 1992
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TL;DR: In this article, a keyless access system for vehicles is proposed, in which the position of the transponder is detected and possibly a signal is triggered via a question/answer dialogue triggered during the locking, the dialogue is triggered when a locking command is issued and the locking is only carried out when the transping signal is detected outside the vehicle.
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Abstract: In a method for detecting a portable transponder (6), locked inside a vehicle, for a key-less access system for vehicles, in which method the position of the transponder is detected and possibly a signal is triggered via a question/answer dialogue triggered during the locking, the dialogue is triggered when a locking command is issued and the locking is only carried out when the transponder is detected outside the vehicle (1).
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Citations
Patent
Hands-free remote entry system
Steven P. Kulha,Joseph S. Bolsenga +1 more
- 05 Mar 1996
TL;DR: In this article, a wake-up receiver within the fob transceiver receives the wakeup/data signal, and the receiver transmits an identification signal to a receiver in the base transceiver, which actsuate a door lock system and an auto theft system.
178
Patent
Anti-theft system for a motor vehicle
Robert Murr,Bernhard Foerstl,Thomas Roehrl,Herbert Zimmer +3 more
- 28 Aug 1995
TL;DR: In this paper, an anti-theft system for a motor vehicle includes a transceiver disposed in a vehicle and a portable transponder, where energy signals are transmitted inductively to the transceiver, where they charge an energy storing device.
91
Patent
Vehicular remote control system and tire pressure monitoring system
Hotta Shinji,Toshihiko Yoshimura +1 more
- 23 Dec 2004
TL;DR: In this paper, a vehicular remote control system has a mobile unit, a vehicle unit for establishing bidirectional wireless communication with the mobile unit where the vehicle unit is able to transmit a wireless signal to the mobile units through transmission antennas provided at a plurality of positions of a vehicle, and operational intention detector, provided at the position of the vehicle corresponding to the transmission antennas, for detecting operational intention of a user approaching the positions.
86
Patent
Keyless device for controlling access to automobiles and keyless method for checking access authorisation
Volker Pretzlaff,Anatoli Stobbe +1 more
- 22 Jun 1998
TL;DR: In this paper, a keyless device for controlling access to automobiles comprises a transceive device which is associated with an automobile, and a mobile transponder, for carrying out a question and answer dialogue on the high frequency channel.
59
Patent
Vehicle automatic door-locking system using identifier signal transmitting portable unit
Hiroki Okada
- 14 Aug 2000
TL;DR: In this article, an automatic controlled door-locking system for locking at least the vehicle operator's door after the door is closed was presented. But the authors did not specify the type of device that was used to detect a symptom indicating that the operator intends to get off the vehicle.
39
References
Keyless entry system with radio card transponder (automobiles)
TL;DR: A keyless entry system for locking and unlocking vehicle doors and for opening the trunk is described in this article, which utilizes a small (ordinary credit-card size) card transponder with a built-in personal identification code that can be carried in a pocket or briefcase and the user does not have to take it out for use because the signal transmission is effected by inductive coupling between the card and loop antennas built into the door mirror housing and rear bumper.
64
Patent
Keyless vehicle lock system
Kurozu Tomotaka,Mikio Takeuchi +1 more
- 30 Oct 1990
TL;DR: A keyless lock system for a vehicle includes a card for transmitting a radio signal, at least one onboard antenna for receiving the radio signal and a control unit for allowing and preventing keyless locking and unlocking operations in dependence on the existence or nonexistence of the card in a predetermined area near the antenna as mentioned in this paper.
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