Process control apparatus
US4032755A · kind A · utility
4Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1975 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Jun 16, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/2409
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A process control apparatus, for example for internal combustion engine fuel injection control, includes a digital memory which produces an n-bit digital output in accordance with two independently variable input signals. The m most significant bits are transferred to a counter which is clocked to give a pulse length output. The n-m least significant bits control a logic circuit which is used to program another counter which is used to introduce an added delay to each output pulse. This arrangement enables higher resolution to be obtained using a limited size main counter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.