Title:
STICKING DETECTION DEVICE OF OIL PUMP
Document Type and Number:
Japanese Patent JP2020008052
Kind Code:
A
Abstract:
To provide a sticking detection device of an oil pump capable of suppressing undershoot that an oil pressure is lowered to be less than a necessary oil pressure, immediately after termination of sticking determination.SOLUTION: In executing sticking determination, a target oil pressure setting portion 150b sets a value higher than a maximum pressure of a partial discharge state, as a target oil pressure for diagnosis to determine whether an oil pump 10 sticks in a full discharge state or a partial discharge state or not, in place of a normal target oil pressure. A discharge state switching portion 150a executes control to switch the discharge state of the oil pump 10 to the partial discharge state. A sticking determination portion 150d determines whether the oil pump 10 sticks in the full discharge state or not on the basis of a relationship between an oil pressure after executing the control to switch the discharge state to the partial discharge state, and a maximum pressure in the partial discharge state. A target oil pressure setting portion 150b sets a target oil pressure in termination of determination, higher than the normal target oil pressure, when the sticking determination is terminated.SELECTED DRAWING: Figure 1
Inventors:
TAKAHASHI YOSHITAKA
Application Number:
JP2018128184A
Publication Date:
January 16, 2020
Filing Date:
July 05, 2018
Export Citation:
Assignee:
SUBARU CORP
International Classes:
F16H61/12; F16H59/18; F16H59/40; F16H59/42; F16H59/72; F16H61/662
Domestic Patent References:
| JP2012112372A | 2012-06-14 | |||
| JP2017106581A | 2017-06-15 | |||
| JP2017026143A | 2017-02-02 | |||
| JP2007132420A | 2007-05-31 |
Attorney, Agent or Firm:
Kazuhiro Ueda