A Feasibility Study of Reciprocating-Flow Super-Adiabatic Combustion Engine

Porous Media in Internal Combustion Engines

“…A similar concept was recently analyzed by Hanamura and Nishio [12]. Also in this engine the maximum combustion temperature is higher than adiabatic owing to heat recuperation in a porous medium.…”

“…Phased combustion system for conventional DI diesel engine, with temporal and spatial control of mixture composition by utilization of interaction between diesel jet and PM structure, so-called two-stage combustion. Most of the PM technologies reported in the literature focus on internal heat recuperation in engines [11][12][13][14][15][16][17][18][19][20][21][22]. The main goal of such PM applications in internal combustion engines is to influence the thermal efficiency of the engine by internal heat recuperation.…”

Analysis of an Internal Combustion Engine Using Porous Foams for Thermal Energy Recovery

“…Although new energy technologies for engines, such as fuel cells, electric batteries, solar cells, and hybrid engines, have been developed, internal combustion (IC) engines remain common [2]. Current diesel engines are more efficient than gasoline engines, especially for high-power applications, and research is ongoing to increase engine efficiency and reduce pollutant emissions [3].…”

“…Hanamura designed a reciprocating heat engine that is similar to a Stirling engine with almost completely adiabatic combustion in a porous media [2]. One-dimensional numerical simulations show that the thermal efficiency of this engine reaches 57.5% at very low compression ratios (between 2 and 3).…”

“…One-dimensional numerical simulations show that the thermal efficiency of this engine reaches 57.5% at very low compression ratios (between 2 and 3). These compression ratios are much lower than those for conventional Otto and diesel cycles [2]. Weclas proposed a strategy for development of intelligent combustion systems for IC engines, utilizing a new concept for mixture formation, i.e., mixture direct injection (MDI), and homogeneous combustion based on the Porous Medium technology [6].…”