Signal generator for suppression of fuel supply actuation at top engine speed
US4311124A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 1978 |
| Grant date | Jan 19, 1982 |
| Priority date | — |
| Expiry date | May 12, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D13/04
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A signal generator for use with a fuel supply system which incorporates a fuel shut-off mechanism. The output signal from the signal generator is applied to the fuel shut-off mechanism whenever the engine exceeds a maximum speed. In order to detect this condition, rpm-synchronous pulses are applied to at least one, and preferably two cascaded multivibrators which control an input of a gate, the other input of which receives the rpm-dependent pulses. The output of the gate is active only if the period of the rpm-dependent pulses is less than the sum of the unstable time constants of the multivibrators, in which case a final multivibrator is triggered and generates a fuel suppression control signal during a large fraction of two crankshaft rotations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.