Control device of vehicle power transmission device
US10167949B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2017 |
| Grant date | Jan 1, 2019 |
| Priority date | — |
| Expiry date | Nov 2, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/1264
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control device of a vehicle power transmission device for the vehicle power transmission device including a line pressure regulating device regulating a hydraulic pressure of a hydraulic fluid discharged from an oil pump to a predetermined line pressure while changing an opening area of a discharge flow passage, and an automatic transmission having a predetermined gear position established by engagement of a hydraulic friction engagement element by using the line pressure as a source pressure, the control device comprising: an abnormality determination portion configured to detect a slip of the hydraulic friction engagement element establishing the predetermined gear position at the time of establishment of the predetermined gear position and, if an input torque at the time of occurrence of the slip is equal to or greater than an abnormality determination value defined in advance based on a torque transmittable at a minimum line pressure by the hydraulic friction engagement element establishing the predetermined gear position, to make an abnormality determination indicative of a possibility of an abnormality causing the output hydraulic pressure of the line pressure regulating de…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.