| 摘要 |
<p>A security system is disclosed for an agricultural vehicle which comprises an ignition lock and an ignition key (10) for releasing the ignition lock. The key incorporates a machine-readable memory chip (12) for storing a security code, and an electronic module (20) is mounted in the vehicle for reading the code stored in the key (10) and disabling normal operation of the vehicle when the code stored in the key (10) does not match a code stored on board the vehicle. In the invention, the electronic module (20) is additionally capable of writing to the memory chip (12) incorporated the key (10), so as to enable an authorised vehicle operator to change both the code stored in the key and the code stored on board the vehicle.</p> |
