ATKINSON CYCLE AND VERY HIGH-PRESSURE TURBOCHARGING: INCREASING INTERNAL COMBUSTION ENGINE EFFICIENCY AND POWER WHILE REDUCING EMISSIONS

摘要

The Downsizing of internal combustion engines (ICE) is already recognized as a veryrnsuitable method for the concurrent enhancement of the indicated fuel conversion efficiencyrn(IFCE) and lowering of the CO2 and NOx emissions [1], [2].rnIn this report the Ultra-Downsizing is introduced as a still higher development stage of ICE.rnThe Ultra-Downsizing will be implemented here by means of strict Atkinson cycles, usingrnasymmetrical crank mechanisms, combined with a very intensive multistage high-pressurernturbocharging with intensive intercooling. This will allow an increase of ICE performancernwhile keeping the thermal and mechanical strain strength of engine components within therncurrent usual limits.