| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To accomplish monitoring of a power source voltage with high accuracy inexpensively in an electronic control device inputted with the power source voltage from a battery of a vehicle and monitoring the power source voltage. <P>SOLUTION: A reference ECU 3 builds-in AD conversion function of higher accuracy than the other ECU, AD-converts the power source voltage fed from the battery and transmits a reference power source voltage information to the other ECU through in-vehicle LAN 4. An air conditioner ECU 2 as one example of the other ECU compares the reference power source voltage information received from the reference ECU 3 with input power source voltage information inputted from the battery and AD-converted to calculate correction coefficient. The air conditioner ECU 2 corrects the input power source voltage information inputted from the battery and AD-converted using the correction coefficient when a user utilizes the vehicle to calculate accurate correction power source voltage information and controls an air conditioner based on the correction power source voltage information. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
