Control arrangement for the shifting of variable change speed gears
US4897790A · kind A · utility
21Cited by
9References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1986 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Nov 14, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/385
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system for the automatic shifting of variable change speed transmission by an electronic control unit through which drive ratio change is determined in accordance with vehicle speed, instantaneous load demand and acceleration calculated from the speed of the driven shaft of the transmission. Drive ratio change command programs based on the behavior of a very good driver manually controlling a comparable transmission, are stored in the control unit to assign varying numbers of the available gear ratios to different combinations of sensed conditions under which automatic drive ratio change is effected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.