| 摘要 |
A master clock on a truck maintains vehicle standard time for the purposes of monitoring and recording vehicle performance data throughout the vehicle. Vehicle performance data is stored for a predefined period of time in response to detecting predefined events. Instances of vehicle performance data is time stamped with vehicle standard time. The master vehicle clock can also maintain the local time displayed to the driver. In response to inputs from the driver, the difference between driver local time and vehicle standard time is computed and the updated local time is displayed to the driver.
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