Controller for electronic key system
First Claim
1. A controller for an electronic key system including a portable device, carried by a user, and a control subject, the portable device incorporating a transponder and generating a signal including an ID code unique to the portable device and a signal including a transponder code unique to the transponder, the controller comprising:
- a first storage circuit for storing an ID code identical to the ID code of the portable device;
a first transmitter circuit for transmitting a request signal that causes the portable device to transmit the signal including the ID code;
a first receiver circuit for receiving the signal including the ID code that is transmitted from the portable device in response to the request signal;
a first control unit for determining whether the ID code stored in the first storage circuit matches the ID code of the portable device and for performing a first control that enables activation of the control subject when the two ID codes match;
a second storage circuit for storing a transponder code identical to the transponder code of the portable device;
a second transmitter circuit for transmitting a transponder activation signal that causes the portable device to transmit the signal including the transponder code;
a second receiver circuit for receiving the signal including the transponder code that is transmitted from the portable device in response to the transponder activation signal;
a second control unit for determining whether the transponder code stored in the second storage circuit matches the transponder code of the portable device and for performing a second control that enables activation of the control subject when the two transponder codes match; and
an instruction device for instructing the user of an operation that must be performed to have the second control unit enable activation of the control subject when the first receiver circuit does not receive the signal including the ID code from the portable device even though the first transmitter circuit is transmitting the request signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A controller for an electronic key system including a portable device and an engine. When the ID code of the portable device cannot be authenticated, the controller instructs the driver of the necessary operations. When a transmitter circuit is transmitting a request signal but a receiver circuit does not receive a signal including an ID code matching the ID code stored in a memory, an authentication ECU authenticates a transponder code of the portable device with a stored transponder code to enable the starting of the engine. The authentication ECU displays the necessary operations for performing transponder code authentication.
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Citations
19 Claims
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1. A controller for an electronic key system including a portable device, carried by a user, and a control subject, the portable device incorporating a transponder and generating a signal including an ID code unique to the portable device and a signal including a transponder code unique to the transponder, the controller comprising:
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a first storage circuit for storing an ID code identical to the ID code of the portable device;
a first transmitter circuit for transmitting a request signal that causes the portable device to transmit the signal including the ID code;
a first receiver circuit for receiving the signal including the ID code that is transmitted from the portable device in response to the request signal;
a first control unit for determining whether the ID code stored in the first storage circuit matches the ID code of the portable device and for performing a first control that enables activation of the control subject when the two ID codes match;
a second storage circuit for storing a transponder code identical to the transponder code of the portable device;
a second transmitter circuit for transmitting a transponder activation signal that causes the portable device to transmit the signal including the transponder code;
a second receiver circuit for receiving the signal including the transponder code that is transmitted from the portable device in response to the transponder activation signal;
a second control unit for determining whether the transponder code stored in the second storage circuit matches the transponder code of the portable device and for performing a second control that enables activation of the control subject when the two transponder codes match; and
an instruction device for instructing the user of an operation that must be performed to have the second control unit enable activation of the control subject when the first receiver circuit does not receive the signal including the ID code from the portable device even though the first transmitter circuit is transmitting the request signal. - View Dependent Claims (2, 3, 4, 5)
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6. A controller for an electronic key system including a portable device, carried by a user, and an engine, the portable device incorporating a transponder and generating a signal including an ID code unique to the portable device and a signal including a transponder code unique to the transponder, the controller comprising:
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a first memory for storing an ID code identical to the ID code of the portable device;
a first transmitter circuit for transmitting a request signal that causes the portable device to transmit the signal including the ID code;
a first receiver circuit for receiving the signal including the ID code that is transmitted from the portable device in response to the request signal;
a second memory for storing a transponder code identical to the transponder code of the portable device;
a second transmitter circuit for transmitting a transponder activation signal that causes the portable device to transmit the signal including the transponder code;
a second receiver circuit for receiving the signal including the transponder code that is transmitted from the portable device in response to the transponder activation signal;
a control unit for performing ID code authentication to determine whether the ID code stored in the first memory matches the ID code of the portable device and enabling activation of the engine when the two ID codes match, and for performing transponder code authentication to determine whether the transponder code stored in the second memory matches the transponder code of the portable device and enabling activation of the engine when the two transponder codes match; and
an instruction device for instructing the user of an operation that must be performed to have the control unit execute the transponder code authentication and enable activation of the engine when the first receiver circuit does not receive the signal including the ID code from the portable device even though the first transmitter circuit is transmitting the request signal. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A method for controlling an electronic key system including a portable device, carried by a user and incorporating a transponder, and an engine, the method comprising the steps of:
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generating a signal including an ID code unique to the portable device and a signal including a transponder code unique to the transponder;
storing an ID code identical to the ID code of the portable device;
transmitting a request signal that causes the portable device to transmit the signal including the ID code;
receiving the signal including the ID code that is transmitted from the portable device in response to the request signal;
performing ID code authentication to determine whether the stored ID code matches the ID code of the portable device and enabling activation of the engine when the two ID codes match;
storing a transponder code identical to the transponder code of the portable device;
transmitting a transponder activation signal that causes the portable device to transmit the signal including the transponder code;
receiving the signal including the transponder code that is transmitted from the portable device in response to the transponder activation signal;
performing transponder code authentication to determine whether the transponder code stored in the second memory matches the transponder code of the portable device and enabling activation of the engine when the two transponder codes match; and
instructing the user of an operation that must be performed to start the step for performing transponder code authentication when activation of the engine is not enabled even though the step for transmitting a request signal and the step for performing ID code authentication are executed. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification