PURPOSE: To determine the parts replacement time and grasp it properly and display in the vehicle by detecting the running conditions of the vehicle and correcting and memorizing the basic service life data of expendable parts where in the data is memorized based on the running conditions.
CONSTITUTION: Based on the car speed, the speed slow down, and the brake operation time detected by a car speed sensor 83, a speed slow down sensor 84, and a brake operation sensor 84, the service life data of brake pad is corrected and memorized in a RAM of an IC card 112. For example, in the case the brake operation time exceeds the set time at the time the car speed exceeds the set speed, the service life data of a brake pad is corrected to be short and memorized. Correction for a tire is also possible in the same way. For example, in the case a car runs at car speed exceeding a prescribed value for a period exceeding a set period, the life of a tire is corrected to be short and memorized. The life data of each of a head light, a small lamp, engine oil, etc., is also corrected and proper replacement time can be reported.
Seiji Hirano
Nobutoki Yoshikazu
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