Internal combustion engine control system
US4886034A · kind A · utility
7Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1989 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Mar 30, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine is provided with a biased by-pass throttle valve that trims the flow of supplementary combustion air for mixing with basic combustion air and fuel induced in carburetor venturi. The by-pass throttle valve is controlled by an electrical stepmotor that is regulated by a pre-programmed microprocessor in response to sensed engine speed and engine manifold pressure conditions to thereby improve engine operating efficiency and reduce noxious emissions without utilizing catalytic converter equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.