Method for the control of a transmission
US6503171B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2000 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Nov 7, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2306/48
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method for controlling a transmission of an engine-driven vehicle having a plurality of gears, the vehicle including a service module actuable by a driver of the vehicle to select a desired gear, the service module being connected to a transmission control system which automatically changes gears in response to actuation of the service module, the vehicle further including an engine braking system connected to the transmission control system which is actuable to brake the vehicle engine during a gear change, the method comprising: monitoring the transmission input rotational speed (NE) and the transmission output rotational speed (NA); calculating a synchronous rotational speed (NE) of the desired gear; actuating the engine braking system to reduce the rotational input speed (NE) and synchronize it with the synchronous rotational speed (NS) so that the desired gear change can be effected; and disabling the engine braking system when a predetermined switch-off threshold is reached at a point in time before an expected synchronization of the rotational speeds (NE) and (NS) occurs. In one preferred embodiment, the engine braking system is disabled when the difference (DA) between ro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.