Apparatus for controlling the traveling speed of a motor vehicle
US4121685A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 1977 |
| Grant date | Oct 24, 1978 |
| Priority date | — |
| Expiry date | Aug 1, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0971
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An apparatus for controlling the traveling speed of a motor vehicle with an electric control unit acted upon by a speed dependent signal, which unit compares the actual traveling speed with a predetermined desired traveling speed, and upon a deviation transmits a signal which is dependent on the size of the deviation to a control stage. The control stage comprises a pneumatic actuator which acts on an element, preferably a throttle valve, which influences the ratio of a fuel-air mixture fed to the motor of the vehicle, as well as two electromagnetically actuatable valves coordinated to the actuator, the valves enabling the actuator to be admitted with reduced- and above atmospheric- pressure, respectively, or reduced- and normal pressure, respectively. The control stage includes an electromagnetic system, which system comprises a U-shaped yoke carrying an excitation coil and an armature immerging between the legs of the yoke. The armature is pivotally mounted for smooth pivoting from a rest position, in which position both of the two valves are closed, against the force of a spring, which force is dependent on the stroke of the actuator, into operating positions, respectively, in w…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.