Isolated combustion and diluted expansion (ICADE) piston engine
US5239959A · kind A · utility
Inventors
Key dates
| Filing date | Jun 22, 1992 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Jun 22, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The "Isolated Combustion and Dilution Expansion (ICADE) Engine", is a piston/cylinder arrangement used primarily for the compression of air and the expansion of diluted hot combustion products. Fuel injection and rapid combustion take place inside a separate combustion chamber, using a near stoichiometric mixture. The combustion pressurization provides the pressure needed to accelerate the combustion products tangentially into the donut shaped cavity formed by the piston/cylinder clearance. There they establish a vortex which enhances rapid mixing, rapid cooling to quench NO.sub.x forming reactions and to temporarily store the kinetic energy of the combustion products to limit the combustion pressure peak acting on the piston surface. The tangential entry also permits detonation combustion without normal shock reflections on the piston surface, thus preventing "knock". Only during the compression stroke, is the combustion chamber isolated from the piston/cylinder arrangement, by a valve with "controlled leakage". During the compression stroke, this "leaky valve" keeps the combustion chamber pressure lower than the pressure inside the cylinder. This controlled pressure difference se…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.