Method and system for controlling air-fuel ratio for gas engine
US10982618B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2020 |
| Grant date | Apr 20, 2021 |
| Priority date | — |
| Expiry date | Sep 14, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and a system for controlling an air-fuel ratio for a gas engine are provided. Current outlet pressure of the nozzle is calculated based on current pressure in an intake pipe and a current rotational speed, without detecting the outlet pressure of the nozzle by a sensor. A fluid state of the gas can be determined based on a ratio of the current outlet pressure to the current inlet pressure of the nozzle collected by a sensor, such that a flow rate characteristic corresponding to the fluid state can be selected to calculate power-on duration for the nozzle, so as to set the air-fuel ratio based on the power-on duration. The power-on duration can be calculated based on flow rate characteristics of the gas in respective fluid states, thereby achieving an air-fuel ratio with high accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.