Vehicle speed control circuit
US4323134A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1979 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | Feb 28, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K31/105
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
There is disclosed an apparatus for automatically maintaining the speed of a vehicle at a desired speed as selected by the vehicle operator. The apparatus includes one feedback loop for monitoring the actual vehicle speed and another feedback loop for monitoring the engine load. The engine load feedback loop enables the speed control to anticipate the effects of changes in road speed so as to minimize or eliminate undershoot or overshoot of the control system. A signal representing the actual vehicle speed is combined with a signal representing the engine load to generate a composite feedback signal to a comparator circuit. The comparator circuit compares the feedback signal with a signal representing the desired vehicle speed and generates control signals for maintaining the speed of the vehicle at the desired speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.