US 12,292,054 B2
Motor control device
Yuichi Seo, Kariya (JP); and Yuuji Hidaka, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on May 26, 2023, as Appl. No. 18/324,247.
Claims priority of application No. 2022-123990 (JP), filed on Aug. 3, 2022.
Prior Publication US 2024/0044338 A1, Feb. 8, 2024
Int. Cl. F04D 27/02 (2006.01); F02D 41/30 (2006.01); F02M 37/20 (2006.01); F04D 15/00 (2006.01); F04D 15/02 (2006.01); H02P 29/032 (2016.01)
CPC F04D 27/0261 (2013.01) [F02D 41/3082 (2013.01); F02M 37/20 (2013.01); F04D 15/0066 (2013.01); F04D 15/0088 (2013.01); F04D 15/02 (2013.01); H02P 29/032 (2016.02)] 12 Claims
OG exemplary drawing
 
1. A motor control device configured to control a motor that drives a fuel pump, comprising:
a processor and memory configured to
detect a sign of a vapor lock that is an abnormality in which the fuel pump is unable to discharge a fuel due to a vapor inside the fuel pump,
change a rotation speed of the motor to reduce the vapor inside the fuel pump with the processor and memory detects the sign of the vapor lock, and
detect the sign of the vapor lock when a vibration determination condition is satisfied, which indicates that a current value of the motor or the rotation speed of the motor oscillates with an amplitude equal to or greater than a preset sign determination value.