Release Signal Authentication Method of Immobilizer
First Claim
1. A release signal authentication method for an immobilizer in which:
- a user can turn on a main switch and can manually perform an operation for rotating an engine in a state that a battery is not be mounted or battery voltage is not sufficient for rotating the engine;
a power source is configured to be supplied to a CPU by power generation resulting from rotation of the engine;
a release signal is configured to be input by the user in a state that the engine is rotating; and
an anti-theft device is configured to be released and the rotation of the engine is sustained when the inputted release signal matches with a release signal registered in advance;
the method comprising;
inputting the release signal by operating an electrical apparatus using voltage supplied by turning on the main switch;
detecting the inputted release signal with the CPU only when a voltage amount supplied to the main switch is equal to or higher than a voltage amount that the CPU can recognize that the main switch is in an ON-state.
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Accused Products
Abstract
In a release signal authentication method for an immobilizer, a main switch can be turned on in a state that a battery is not mounted or the like, power is supplied to a CPU by power generation resulting from manual rotation of the engine, a release signal can be inputted by the user in a state that the engine is rotating, and the rotation of the engine is continued if the release signal matches with a release signal registered in advance. Further, in the release signal authentication method for an immobilizer, an input of the release signal can be given by operating an electrical apparatus using voltage supplied by the main switch, the release signal can be discriminated in the CPU, and the release signal can be discriminated only when a voltage amount supplied to the main switch is equal to or higher than a voltage amount that the CPU can recognize that the main switch is in a ON-state.
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Citations
19 Claims
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1. A release signal authentication method for an immobilizer in which:
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a user can turn on a main switch and can manually perform an operation for rotating an engine in a state that a battery is not be mounted or battery voltage is not sufficient for rotating the engine; a power source is configured to be supplied to a CPU by power generation resulting from rotation of the engine; a release signal is configured to be input by the user in a state that the engine is rotating; and an anti-theft device is configured to be released and the rotation of the engine is sustained when the inputted release signal matches with a release signal registered in advance; the method comprising; inputting the release signal by operating an electrical apparatus using voltage supplied by turning on the main switch; detecting the inputted release signal with the CPU only when a voltage amount supplied to the main switch is equal to or higher than a voltage amount that the CPU can recognize that the main switch is in an ON-state. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A release signal authentication method for an immobilizer of a vehicle having an engine, the method comprising:
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determining if a first output voltage of a main switch of the vehicle is greater than a first predetermined voltage level; detecting an output signal of an electrical apparatus of the vehicle only if the first output voltage is greater than the first predetermined voltage level; comparing the output signal of the electrical apparatus to a predetermined release code of the immobilizer; and allowing the engine to continue to operate if the output signal of the electrical apparatus matches the release code. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An immobilizer apparatus for a vehicle having an engine, the immobilizer apparatus comprising:
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an electrical apparatus configured to be actuatable by a user of the vehicle and to output an output signal corresponding to actuation; a central processing unit (CPU) having a release code stored therein, the release code corresponding to a predetermined pattern of actuation of the electrical apparatus; a main switch that a user can turn on; a power source configured to supply power to the CPU by power generation resulting from rotation of the engine; wherein the CPU is configured to recognize that the main switch is activated only if the voltage received from the main switch is equal to or greater than a first predetermined voltage value, wherein the CPU is configured to detect signal changes from the electrical apparatus only if an output signal of the electrical apparatus is greater than a second voltage value that is less than the first predetermined voltage value, and wherein the CPU is configured to compare the output signal of the electrical apparatus with the release code and to allow the engine to continue to operate only if the output signal corresponds to the release code. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An immobilizer apparatus for a vehicle having an engine, the immobilizer apparatus comprising:
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an electrical apparatus configured to be actuatable by a user of the vehicle and to output an output signal corresponding to actuation; a storage device having a release code stored therein, the release code corresponding to a predetermined pattern of actuation of the electrical apparatus; a main switch that a user can turn on; a power source configured to supply power to the main switch and the electrical apparatus from rotation of the engine; and means for recognizing that the main switch is activated only if the voltage received from the main switch is equal to or greater than a first predetermined voltage value, for detecting signal changes from the electrical apparatus only if an output signal of the electrical apparatus is greater than a second voltage value that is less than the first predetermined voltage value, and for comparing the output signal of the electrical apparatus with the release code and for allowing the engine to continue to operate only if the output signal corresponds to the release code.
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Specification