Keyless entry function expander
First Claim
1. A vehicle security system expander for use with a security system having a first output function that is actuated in response to a signal produced by one of an actuation of a remote control module and an actuation of a local control module, said expander comprising:
- a detector for detecting an output signal produced by each of said remote control module and said local control module;
a signal origin identifier for determining if said output signal is produced by actuation of said remote control module or by actuation of said local control module; and
a signal decoder for decoding signals produced by multiple actuations of said remote control module and providing a second function when said multiple actuations of said remote control module are received within a predetermined time period after said output signal is produced.
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Accused Products
Abstract
An add-on, or after-market, remote-control vehicle security system expander allows auxiliary remote-control functions to be added to previously-installed remote-control systems. Using complementary remote control functions for multiple actuation encoding permits auxiliary function codes to be transmitted without a change of state in the underlying function. Signal validation by coincidence timing and voltage comparison are used to prevent inadvertent local actuation of the auxiliary remote-control functions. Decoding is also limited to a time-window to reduce electrical interference.
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Citations
14 Claims
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1. A vehicle security system expander for use with a security system having a first output function that is actuated in response to a signal produced by one of an actuation of a remote control module and an actuation of a local control module, said expander comprising:
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a detector for detecting an output signal produced by each of said remote control module and said local control module; a signal origin identifier for determining if said output signal is produced by actuation of said remote control module or by actuation of said local control module; and a signal decoder for decoding signals produced by multiple actuations of said remote control module and providing a second function when said multiple actuations of said remote control module are received within a predetermined time period after said output signal is produced. - View Dependent Claims (2, 3, 4, 5)
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6. A vehicle security system expander for use with a security system having a door lock and a door unlock function that is actuated in response to respective lock and unlock signals produced by one of an actuation of a remote control module and an actuation of a local control module, said expander comprising:
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a signal detector for detecting a signal produced by each of said remote control module and said local control module; a signal identifier for determining if said output signal is produced by actuation of said remote control module or by actuation of said local control module; and a signal decoder for decoding combinations of the door lock and door unlock signals produced by multiple actuations of said remote control module which are detected within a predetermined time window and providing respective predetermined functions in response to said combinations.
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7. A vehicle security system expander comprising:
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a local control module for locally controlling unlocking and locking of vehicle doors; a remote control module for remotely controlling unlocking and locking of vehicle doors; a main control unit electrically connected to said local control module and said remote control module; a remote control signal receiver electrically connected to said local control module, said main control unit adapted to receive remote control signals from said remote control module;
whereinsaid local control module is directly connected to said main control unit at a first connection and is connected to said main control unit via said remote control signal receiver at a second connection such that a local control signal output from said local control module is received at said main control unit via said first connection and said second connection. - View Dependent Claims (8, 9)
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10. A vehicle security system expander having a first output function and being actuated in response to a signal produced by one of an actuation of a remote control module and an actuation of a local control module, said expander comprising:
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an identifier for determining if said output signal is produced by actuation of said remote control module or by actuation of said local control module; a verifying device for verifying said output signal if said output signal is produced by actuation of said remote control module; and a control unit for responding to a signal verified by said verifying device to produce said first output function. - View Dependent Claims (11, 12, 13, 14)
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Specification