Method and means for determining air mass in a crankcase scavenged two-stroke engine
US4987773A · kind A · utility
10Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1990 |
| Grant date | Jan 29, 1991 |
| Priority date | — |
| Expiry date | Feb 23, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2400/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The mass of air available for combustion within a cylinder of a crankcase scavenged two-stroke engine is obtained by estimating the mass of air trapped within a crankcase chamber, prior to its transfer to the associated cylinder combustion chamber. The estimate for air mass is derived from the product of pressure of the air in the crankcase chamber and the crankcase chamber volume at a selected engine cycle position during that portion of the engine cycle when the air is trapped and undergoes compression within the crankcase chamber divided by a factor containing the trapped air temperature at the selected engine cycle position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.