Closed loop fast idle control system
US3964457A · kind A · utility
84Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1974 |
| Grant date | Jun 22, 1976 |
| Priority date | — |
| Expiry date | Jun 14, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/067
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A closed loop fast idle control system is disclosed for controlling the idle speed of an internal combustion engine during the transitional warm-up period. The system compares the actual engine speed with a reference speed signal and controls the air delivery to the engine to minimize the difference. The reference speed signal is generated as a function of the engine's temperature. Being a closed loop control, the system automatically compensates for changes in the engine's load thereby providing for increased efficiency and a reduction in undesirable exhaust emissions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.