UNIT OF ANTITHEFT DEVICE FOR INTERLOCKING FUNCTIONAL MEMBER OF VEHICLE Russian patent published in 2008 - IPC B60R25/00 

FIELD: transport engineering; antitheft devices.

SUBSTANCE: invention can be used in antitheft device to prevent hi-jacking of vehicle by interlocking electric circuits of its functional members, for instance, ignition and engine starting systems, fuel pump, automatic transmission, etc. Unit includes interface coupled with command synthesis processor unit and series-connected thereto decoder, memory and controllable switch coupled with one of functional members of vehicle. Unit includes also delay element whose output is coupled with second enable input of memory, motion pickup unit connected with its third enable input and nonvolatile memory element whose input is connected to information output of memory, and output, to delay element. Motion pickup unit is, and with use of three-component accelerometer connected to motion pickup unit through high-frequency filter of accelerometer signal summer, and also threshold signal source and comparison element. Output if summer is connected to first input of comparison element and to input of threshold signal source connected by output to second input of comparison element whose output is output of motion pickup unit. Invention excludes influence of orientation of motion pickup relative to natural system of coordinates and geographical location of vehicle onto sensitivity of motion pickups.

EFFECT: prevention of possibility of initial and repeated unauthorized movement of vehicle.

2 dwg