| 摘要 |
A user, e.g. a disabled person in a wheelchair, may remotely control vehicle functions of a vehicle (3) by using a portable hand-held control device (1). From a comparatively long distance, a command may be sent via a radio link (8) to a base station (2) fitted to the vehicle so as to, for example, instruct the vehicle electronics to start the vehicle engine (4), thereby to warm up the vehicle before the disabled person arrives at the vehicle. Further commands may be sent by an infra-red or ultrasonic link (9) in order to control vehicle functions, such as opening a door (5) or lowering a ramp (6), that need the user to be within sight of the vehicle to ensure that those vehicle operations do not accidentally hurt passersby or passing vehicles. Preferably, any command sent via the infra-red or ultrasonic link (9) has the effect of cancelling any command previously sent via the radio link (8), so that, for example, the user is not able to enter the vehicle whilst the engine is still running. This helps to prevent any unintended engagement of the transmission from causing premature movement of the vehicle.
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