Control device and control method for a vehicular automatic transmission
US6790160B2 · kind B2 · utility
19Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Nov 26, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/60
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
When a clutch is disengaged in a D-N shift, a duty ratio of a linear solenoid in a stand-by state at a constant pressure is calculated according to the following equation by using the following values: a reference duty ratio in a stand-by state at a constant pressure; a correction value for an AT oil temperature; a correction value for an engine speed; and respective learning correction values in a N-D shift and a 4-3 coast down shift in which the clutch is engaged. In the equation, K is a coefficient and has a constant value predetermined in the range of 0≦K≦1.DSL3A=dsdn+dsdntmp+dsdnne+K×gdndlrn+(1−K)gdcstapl
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.