Method for operating an automatic or semi-automatic transmission of a heavy vehicle when in idle-driving mode
US8251871B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2007 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | May 7, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2312/06
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method for operating a semi-automatic or automatic mechanical transmission of a heavy truck when driving at idle speed is provided. The method includes supplying fuel to the engine of the heavy truck at a rate that facilitates engine-idle operation. In another step, the method engages the automatic or semi-automatic transmission in a gear higher than the starting gear of the transmission and permits the truck to operate at a first substantially uniform driving velocity under engine-idle power. Depending upon traffic and environmental requirements which require a higher speed, the driver upshifts the semi-automatic or automatic transmission by depressing a control device for manual gear selection arranged on a gear shift lever of the truck and then drives the truck at a second substantially uniform driving velocity under engine-idle power. The second substantially uniform driving velocity is greater than the first substantially uniform driving velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.