Automatically controlling the transmission ratios of an automotive vehicle engine for decreasing the vehicle speed
US4039061A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 28, 1972 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | Jun 28, 1992 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H59/22
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Automatically controlling the transmission ratios of an automotive vehicle engine by detecting the speed of the engine, generating a signal proportional to the detected speed and comparing this signal with different predetermined reference speed signals, detecting the transmission ratio of the transmission, comparing this ratio with a predetermined reference ratio and generating a ratio signal as long as the detected ratio remains below the reference ratio, maintaining the detected ratio constant until the detected engine speed signal falls below the predetermined reference speed signal and generating a signal to increase the transmission ratio when the engine speed signal falls below the predetermined reference speed signal, and increasing the transmission ratio in the direction of the reference ratio as long as the detected speed signal remains below the predetermined reference speed signal and the detected ratio is less than the reference ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.