Method for controlling stepless automatic transmission and apparatus therefor
US4976170A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1988 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | Aug 10, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S477/905
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method for controlling a stepless automatic transmission of a vehicle and an apparatus therefore automatically control the transmission ratio according to the change with respect to time of a throttle aperture and a driving condition of the vehicle. A change with respect to time of the throttle aperture is taken into account in determining the objective engine speed and the transmission ratio. An apparatus includes a throttle sensor for sensing a change with respect to time of the throttle aperture, a first allocator for allocating an objective engine speed in a condition that the change with respect to time of the throttle aperture is within a prescribed range, a second allocator for allocating an objective engine speed in a condition that the throttle aperture is opened more rapidly than a first prescribed value, a third allocator for allocating an objective engine speed in a condition that the throttle aperture is closed more rapidly than a second prescribed value, and a transmission controller for controlling a transmission ratio of the stepless automatic transmission so that an actual engine speed coincides with the objective engine speed. A method includes the steps of sens…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.