| 摘要 |
The device is characterised by comprising: a) a diversification of power supply points 2, 3, 4 in order to allow the voltage of at least one of such points to be present when all the other voltages are lacking due to defective contacts, said voltage being able to keep the antitheft circuit 1 inactive particularly during vehicle running, and which would otherwise be activated by the voltage originating from said defective contacts; b) a delay circuit (67, 69 Fig 2, not shown) for delaying, even when all the power supply signals are lacking, the operation of a device on which the antitheft circuit acts to shut off the engine, said circuit not acting however on acoustic and/or optical warning devices to which the antitheft device is connected so that for a predetermined time period following the operation of the antitheft device a prealarm signal is provided which causes said warning devices to operate but not the device which shuts off the engine, so allowing the user to stop the engine. <IMAGE> |
