Anti-theft device having minimal power consumption characteristics
AssigneeNippondenso Co., Ltd.
InventorsHiroyuki Ina, Hidehito Mori
Life of this patent
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Abstract
When a key is inserted into a key cylinder and a key insertion switch switches from an open state to a closed state, a signal is provided to a main relay controller. This main relay controller provides a low level signal to a base of a first transistor to actuate a coil. Therefore, a contact point is closed and power is supplied to an anti-theft controller and an engine controller. Thus, these controllers do not consume power until the key insertion switch is closed and thus, their construction can be made simple since there is no need to operate them in a sleep mode.
Claims20
An anti-theft device for verifying a first secret identification code transmitted by a start command device with reference to a second secret identification code of a moving body driven by a motor, said anti-theft device comprising:
- start command detection means for detecting a start condition indicative of start of a transmission operation of said start command device;
- a main relay unit for receiving power from an external power source;
- a receiver for receiving said first secret identification code from said start command device when said start command detection means detects said start condition;
- a secret identification code verification unit which is connected to said external power source, said secret identification code verification unit being for receiving said first secret identification code from said receiver and for generating a verification signal after comparing said first secret identification code and said second secret identification code, said secret identification code verification unit being actuated after receiving power from said external power source when said start command detection means detects said start condition;
- and
- a motor controller which is connected to said external power source, said motor controller being for receiving said verification signal from said secret identification code verification unit and for controlling said motor based on said verification signal after receiving power from said external power source when said start command detection means detects said start condition.
An anti-theft device for verifying a first secret identification code transmitted by a start command device with reference to a second secret identification code of a moving body driven by a motor, said anti-theft device comprising:
- start command detection means for detecting a start condition indicative of start of a transmission operation of said start command device;
- a receiver for receiving said first secret identification code from said start command device when said start command detection means detects said start condition;
- a secret identification code verification unit which is connected to an external power source, said secret identification verification unit being for receiving said first secret identification code from said receiver and for generating a verification signal after comparing said first secret identification code and said second secret identification code, said secret identification code verification unit being actuated after receiving power from said external power source when said start command detection means detects said start condition;
- first switching means for connecting and disconnecting said secret identification code verification unit from said external power source;
- a motor controller which is connected to said external power source, said motor controller being for receiving said verification signal from said secret identification code verification unit and for controlling said motor based on said verification signal after receiving power from said external power source when said start command detection means detects said start condition;
- second switching means for connecting and disconnecting said motor controller from said external power source;
- and
- a main relay unit which is connected to said external power source to always receive power from said external power source, said main relay unit being for controlling said first switching means to connect said secret identification code verification unit with said external power source when said start command detection means detects said start condition and for controlling said second switching means to connect said motor controller with said external power source when said start command detection means detects said start condition.
Dependencies are inferred from the claim text.