A communication for a vehicle (10) has a first transmitter (34) for transmitting a first signal relating to a first vehicle system (22) and a second transmitter (42) for transmitting a second signal relating to a second vehicle system (38). (FIG. 1) A single receiver (46) has a first reception mode (50)...http://www.google.com.tw/patents/US7734391?utm_source=gb-gplus-share專利 US7734391 - Hysteresis of switching from park to drive based on vehicle speed
