Measuring apparatus for measuring an injected quantity of liquid
US5801308A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 1997 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Sep 4, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A measuring apparatus according to the present invention for measuring an injected quantity of fuel at pilot injection in an internal combustion engine, particularly, a diesel engine, which performs main injection process after the pilot injection process, includes: an injection pump for injecting fuel every one injection period; a closed pressure vessel for temporarily storing the fuel injected from the injection pump; a detection unit for detecting change of pressure of the fuel within the pressure vessel; a volume-variable device having a predetermined volume and coupled to the pressure vessel; and a measurement control unit for measuring the injected quantity of the fuel at one injection period based on result of detection by the detection means, by calculating the injected quantity at pilot injection based on a ratio of the change of pressure within the pressure vessel at injection of the fuel and the change of the pressure within the pressure vessel caused by change of the predetermined volume before injection of the fuel. In the present invention, the injection quantity of fuel at pilot injection is measured separately from the injection quantity of fuel at main injection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.