发明名称 |
METHOD FOR DIAGNOSING ELECTRIC WATER PUMP OF ENGINE |
摘要 |
A method for diagnosing an electric water pump of an internal combustion engine includes determining whether a present condition is a coil-open diagnosis condition that enables diagnosis of whether any coil of a sensorless 3-phase motor used in the electric water pump is open. When the coil-open diagnosis condition is satisfied, whether a coil of one phase is open is determined by using a change in phase currents. When the coil-open diagnosis condition is satisfied, whether coils of two phases are open is determined by using a magnitude of a motor torque or a magnitude of an average phase current. When the coil-open diagnosis condition is satisfied, whether any coil of the motor is open during driving of the motor is determined by using a variation in the motor torque. |
申请公布号 |
US2016164441(A1) |
申请公布日期 |
2016.06.09 |
申请号 |
US201514726384 |
申请日期 |
2015.05.29 |
申请人 |
HYUNDAI MOTOR COMPANY ;Kia Motors Corporation ;MYUNG HWA IND. CO., LTD. |
发明人 |
PARK Jung Hoon;KIM Kyoung Hee;CHO Jae Man;OH Tae Sung;DONG Geun Oh |
分类号 |
H02P6/12;H02P6/18 |
主分类号 |
H02P6/12 |
代理机构 |
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代理人 |
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主权项 |
1. A method for diagnosing an electric water pump of an internal combustion engine, comprising steps of:
a) determining whether a present condition of the electric water pump is a coil-open diagnosis condition that enables diagnosis of whether any coil of a sensorless 3-phase motor used in the electric water pump is open; b) determining whether a coil of one phase is open by using a change in phase currents when the coil-open diagnosis condition is satisfied; c) determining whether coils of two phases are open by using a magnitude of a motor torque or a magnitude of an average phase current when the coil-open diagnosis condition is satisfied; and d) determining whether any coil of the motor is open during driving of the motor by using a variation in the motor torque when the coil-open diagnosis condition is satisfied. |
地址 |
Seoul KR |