Improved low heat rejection high efficiency engine system

Abstract

An improved low heat rejection high efficiency engine system for an insulated two stroke internal combustion engine which includes an insulation component provided in association with at least one combustion chamber in order to minimise heat loss during operation, the system having at least one inlet port fluidly connected to a transfer port from a pumping cylinder for inlet of a fresh charge in an induction portion of the operation cycle, the inlet port opened and closed during the operation cycle by an inlet valve, characterized in that the period for which the inlet valve is open during the operation cycle is less than 180 DEG of rotation.

Description

technical field The invention relates to the field of improving the efficiency of engines and drive trains for vehicles, especially low heat loss engines and drive trains. Background technique The inventors of the present invention have been active in the field of engine systems, especially in the technology of improving engine efficiency, for example, US Pat. Nos. US6,571,755 and US5,265,564. The relevant engines in the present invention refer to the engines described in these two patents. The application of thermal insulation of surfaces exposed to hot process gases, including coatings, air gaps, gaskets or the use of low heat transfer materials on components, can improve thermal efficiency of operation, as is well known in the art of internal combustion engines. But in practice, as shown in the prior art, such measures improve operational efficiency far less than expected or extrapolated values. Except for smaller (eg lawn mowers and scooters) and larger (eg cargo sh...

AI Technical Summary

Problems solved by technology

Increased gas density at higher temperatures and pressures due to shorter ignition delay (due to higher gas temperatures) resulting in less efficient gas / fuel mixing;

Increased compression work required due to the higher temperature and pressure of the inhaled charge gas

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