| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor-driven pump control device capable of uniformizing service lives of a plurality of motor-driven pumps to the utmost by driving each of the motor-driven pumps in a manner responding to performance decline of each of the motor-driven pumps accompanied by their use. SOLUTION: In a circulation path 2 provided in a cooling system of an automobile, a motor-driven water pump WP1 and a motor-driven water pump WP2 which are controlled and driven by an electronic control device 10 are arranged in each of an upstream side and a downstream side of an internal combustion engine 1. To grasp load conditions of the motor-driven water pumps WP1, WP2, a detection signal from an intake air temperature sensor 15 and drive voltage of the motor-driven water pumps WP1, WP2 are read to the electronic control device 10. The electronic control device 10 compares integrated values of values obtained by weighting driving time of each of the motor-driven water pumps WP1, WP2 in accordance with the load conditions, and selects the smaller integrated value as a drive target. COPYRIGHT: (C)2006,JPO&NCIPI
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