Back to results
US 9,174,669 B2Granted
Control apparatus for hydraulic power steering system
AssigneeJtekt Corporation
InventorYasushi Yamada
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeJtekt Corporation
InventorYasushi Yamada
Estimating the term…
In a control apparatus for a hydraulic power steering system including multiple electric pumps, a first ECU determines that start-up of a first motor is completed when a first current value, which is a value of current flowing to a first electric pump, has been within a prescribed current range continuously for a prescribed period of time or longer. An upper limit of the prescribed current range is set to be less than to a limit value provided as an upper limit of a current supplied simultaneously to the first and second electric pumps after completion of start-up. A lower limit of the prescribed current range is set to a minimum value of a current indicating that the first electric pump is in an energized state. After start-up of the first motor is determined to be completed, a second ECU starts electric power supply to the second electric pump.
A control apparatus for a hydraulic power steering system, the hydraulic power steering system including two or more electric pumps that supply hydraulic fluid to a hydraulic actuator that generates assist force,
Dependencies are inferred from the claim text.