The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 2016
Filed:
May. 29, 2015
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Myung Hwa Ind. Co., Ltd., Seoul, KR;
Jung Hoon Park, Anyang-si, KR;
Kyoung Hee Kim, Ansan-si, KR;
Jae Man Cho, Seoul, KR;
Tae Sung Oh, Ansan-si, KR;
Geun Oh Dong, Hwaseong-si, KR;
HYUNDAI MOTOR COMPANY, Seoul, KR;
KIA MOTORS CORPORATION, Seoul, KR;
MYUNG HWA IND. CO., LTD., Seoul, KR;
Abstract
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.