| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent misdiagnosis of circulation abnormality of fluids, without enlarging the power consumption of a pump which circulates fluid in a fuel cell, or without shortening the durability lifetime of the pump. <P>SOLUTION: A pressure sensor 11 detects the pressure of coolant circulated in the fuel cell 1. A vehicle front-rear G detecting means 16, a vehicle-side G detecting means 17, and a vehicle vertical G detecting means 18 detect the vehicle front-rear G, the vehicle lateral G, and the vehicle vertical G, respectively. A diagnosis pressure threshold correcting means 19 corrects the diagnosis pressure threshold, according to the vehicle front-rear G, the vehicle-side G, and the vehicle vertical G. A coolant circulation abnormality diagnosing means 20 compares the pressure of the coolant detected by the pressure sensor 11 with the diagnosis pressure threshold corrected by the diagnosis pressure correcting means 19, thereby this system diagnoses whether the coolant is circulating normally. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
