Patent ID: 6664899
Filing Date: 2003-12-16
Classification: B60R,G06K,G07C,G08C

Abstract:
A portable unit of a wireless control apparatus for vehicles, comprising:start signal reception means for receiving a start signal for electromagnetic induction from a vehicle side apparatus of a vehicle; reset means for generating a reset signal based on the start signal received by the start signal reception means; memory means for storing vehicle information; communication signal reception means for receiving a communication signal from the vehicle; carrier sensing means for generating a communication possible signal when a detection signal level of the received communication signal is not lower than a predetermined level; communication signal transmitting means for transmitting a communication signal to the vehicle side apparatus; control means for controlling operation of the communication signal transmitting means; and operation power switching means for selecting between a signal power operation mode in which the portable unit operates from electric power obtained from the start signal and a power source operation mode in which the portable unit operates from an internal power source, wherein the control means operates using electric power obtained from the start signal when the start signal from the vehicle side apparatus is received in the signal power operation mode, while the control means is reset by the reset signal of the reset means generated based on the start signal, wherein the operation power switching means switches from the signal power operation mode to the power source operation mode after the control means is reset by the reset signal, so that the control means operates using electric power from the internal power source and the communication signal transmitting means transmits to the vehicle side apparatus the vehicle information stored in the memory means, wherein the communication signal from the vehicle side apparatus includes a vehicle-side identification code, wherein the vehicle information stored in the memory means includes a portable-unit-side identification code, wherein the control means compares the vehicle-side identification code included in the communication signal and the portable-unit-side identification code when the communication signal reception means receives the communication signal from the vehicle side, and wherein the operation power switching means switches from the power source operation mode to the signal power operation mode when the vehicle-side identification code included in the communication signal and the portable-unit-side identification code are different, whereby the operation of the control means is stopped.