Internal combustion piston engine using air chamber in piston driven in resonance with combustion wave frequency
US4592318A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1983 |
| Grant date | Jun 3, 1986 |
| Priority date | — |
| Expiry date | Sep 23, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine piston and combustion chamber are configured to produce controlled reaction of the fuel supplied to the working chamber with prolonged supply of air to the reaction zone over the combustion/expansion part of the engine operating cycle. After an axially stratified charge, with little or no fuel near the piston working face, is established in the working chamber of the engine, part of the air is transferred during the compression of the charge into an air chamber near the working face of the piston which communicates with the working chamber through a restricted gap orifice. The air chamber is configured to resonate at the same frequency as the frequency of the combustion waves in the manner of a Helmholtz resonator, with a specific gap dimension and air chamber volume that is mathematically related to gap area, the speed of sound in the air chamber at the autoignition temperature of the compressed charge in the working chamber, the axial length and radial width of the gap orifice, and the natural Helmholtz resonant frequency of the gas in the air chamber. The resonating gases in the air chamber, moreover, induce closed organ pipe resonance in the workin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.