Keyless vehicle lock system
First Claim
Patent Images
1. A keyless lock system for a vehicle, comprising:
- a portable communicating means for transmitting a code signal;
an onboard communicating means for receiving said code signal from said portable communicating means;
a primary means for sensing a position of a monitored door of the vehicle to determine whether the door is in a closed state or in an open state;
a final means for producing a first warning signal in response to a first alarm command signal; and
a controlling means for producing an automatic request signal when the door is moved between the open state and the closed state, ascertaining an existence of said portable communicating means by receiving said code signal through said onboard communicating means when said automatic request signal is produced, and producing said first alarm command signal if said portable communicating means is absent.
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Abstract
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 lock and unlock operations in dependence on the existence or nonexistence of the card in a predetermined area near the antenna. The control unit monitors the position of at least one monitored door, and produces a card warning signal each time the monitored door is closed if the card is absent in the vehicle.
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Citations
22 Claims
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1. A keyless lock system for a vehicle, comprising:
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a portable communicating means for transmitting a code signal; an onboard communicating means for receiving said code signal from said portable communicating means; a primary means for sensing a position of a monitored door of the vehicle to determine whether the door is in a closed state or in an open state; a final means for producing a first warning signal in response to a first alarm command signal; and a controlling means for producing an automatic request signal when the door is moved between the open state and the closed state, ascertaining an existence of said portable communicating means by receiving said code signal through said onboard communicating means when said automatic request signal is produced, and producing said first alarm command signal if said portable communicating means is absent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A keyless lock system for a vehicle, comprising:
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a portable communicating means for transmitting microwaves; an onboard communicating means for receiving microwaves from said portable communicating means; an actuating means for actuating a lock unit of the vehicle in response to an actuation command signal; and a controlling means for calculating a distance between said portable communicating means and said onboard communicating means by using a microwave propagation time, determining, in dependence on said distance, whether said portable communicating means is in a predetermined area or not, and producing said actuation command signal only when said portable communicating means is in said predetermined area. - View Dependent Claims (22)
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Specification