Apparatus and method for controlling rotational speed of internal combustion engine for vehicles
US4787044A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 16, 1985 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Jul 16, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H63/502
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Engine speed is controlled during gear change by way of both fuel supply apparatus and exhaust brake so that engine speed is equal to the rotational speed of an input shaft of a transmission coupled via a clutch to the engine. When the engine speed is higher than the rotational speed of the transmission input shaft, exhaust braking is performed to quickly reduce the engine speed thereby establishing synchronization. Then the fuel supply apparatus is controlled to reduce the amount of fuel for maintaining the decreased engine speed. On the other hand, when the engine speed is lower than the rotational speed of said transmission input shaft, only the fuel supply apparatus is controlled to increase the fuel amount. Engine braking is performed only when the clutch is in disconnected state, and therefore, vehicle speed is not decelerated due to the engine braking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.