Soft shift system and method
US6679806B2 · kind B2 · utility
2Cited by
14References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2002 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | Jan 3, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/146
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A system and method for the soft shift of a transmission connecting a power source to a well stimulation pump through a transmission. When it is desired to change gear ratios in the transmission, the transmission is caused to enter a torque converter mode from a lockup mode. The engine speed is adjusted according to a signal representative of the speed of the transmission output shaft. Once the gear ratio has been changed, the transmission is caused to enter a lockup mode from the torque converter mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.