Vehicle speed control systems
US4336566A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1980 |
| Grant date | Jun 22, 1982 |
| Priority date | — |
| Expiry date | Jul 24, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2552/15
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle speed system is described in which an electrical signal representing actual vehicle speed is compared with a stored signal representing desired vehicle speed. Any speed error is used in a servo loop to generate a control signal which tends to reduce the error to zero. In addition, signals representing the actual and desired vehicle speeds are compared in a comparator unit so as to produce a disabling signal when the actual vehicle speed either exceeds the desired speed by more than a predetermined amount, or falls below the desired speed by more than a predetermined amount, (e.g. because road conditions prevent the vehicle engine from driving the vehicle at or close to the desired speed). This enabling signal is used to switch the control system out of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.