Ignition and fuel injection system for multicylinder engines
US4398520A · kind A · utility
11Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1981 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Mar 27, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The switching off of one or more cylinders of a multicylinder engine to save fuel when the engine is running lightly loaded has been found to reduce the effectiveness of computer control of ignition timing and fuel injection unless additional fields of stored control information are provided for responding to the various combinations of engine parameter values that arise in operation. Accordingly, with each step of reduction of the number of working cylinders, the control of ignition timing and fuel injection is shifted to a different bank of fixed value memory (ROM).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.