Title:
STICKING DETECTION DEVICE OF OIL PUMP
Document Type and Number:
Japanese Patent JP2019190340
Kind Code:
A
Abstract:
To provide a sticking detection device of an oil pump which can detect the sticking of the oil pump without imparting an incongruity to a driver or the like at a sticking diagnosis.SOLUTION: A target hydraulic pressure setting part 150b sets a value higher than the maximum pressure in a partial discharge state as a diagnosis target hydraulic pressure. A discharge state changeover part 150a performs control for bringing a discharge state of an oil pump 10 into the partial discharge state. A sticking determination part 150d determines whether or not the oil pump 10 is stuck in a full-discharge state on the basis of a relationship between a hydraulic pressure after the control for setting the partial discharge state is performed and the maximum pressure in the partial discharge state. A sticking determination prohibition part 150e prohibits or interrupts the execution of the sticking determination when a first index value (for example, an engine rotation number or an oil temperature) having a correlation with a flow rate and the hydraulic pressure of oil discharged from the oil pump 10, or a second index value (for example, a vehicle speed) having a correlation with a magnitude of a sound other than noise resulting from the oil pump 10 satisfies a prescribed condition.SELECTED DRAWING: Figure 1
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Inventors:
TAKAHASHI YOSHITAKA
Application Number:
JP2018082486A
Publication Date:
October 31, 2019
Filing Date:
April 23, 2018
Export Citation:
Assignee:
SUBARU CORP
International Classes:
F04B49/10; F04C14/28; F16H59/36; F16H59/72; F16H61/02; F16H61/12
Domestic Patent References:
| JP2017106581A | 2017-06-15 | |||
| JP2017150603A | 2017-08-31 | |||
| JP2014234909A | 2014-12-15 | |||
| JP2013096540A | 2013-05-20 | |||
| JP2002120704A | 2002-04-23 |
Attorney, Agent or Firm:
Kazuhiro Ueda