Apparatus for controlling the traveling speed of a motor vehicle
US4142602A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1977 |
| Grant date | Mar 6, 1979 |
| Priority date | — |
| Expiry date | Aug 4, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K31/08
- 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 pressure, or normal pressure, respectively. The control stage includes an electromagnetic system having an excitation coil and an armature cooperating therewith. 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 which positions one of the two valves is opened and the other valve is closed. An additional valve admits the p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.