Signal amplification means
US4198934A · kind A · utility
3Cited by
11References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1978 |
| Grant date | Apr 22, 1980 |
| Priority date | — |
| Expiry date | Jun 20, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/32
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In an electronic fuel injection system for internal combustion engines a voltage multiplier is used to amplify a manifold absolute pressure signal by an amplification factor which is related to throttle position. A dc voltage related to throttle position is converted to a digital signal which controls a bilateral switch which in turn regulates the feed back resistance in an operational amplifier thus regulating the operational amplifier amplification factor. The manifold absolute pressure signal is amplified by the operational amplifier. The resultant signal determines the fuel injector open time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.