Abstract
KAIHO Engine is a new external combustion engine having following features; (1)Can use solid disposal biomass as the fuel directly, and all combustion gas generated can be used for heating the working gas(N_2), (2)Is consisted of pressure difference generator(PDG), power piston(PP), heater, regenerator, cooler, Separated each other, connected by pipes. The size of the heater, regenerator, cooler are not restricted. The operating principle of this engine is that PDG generates output and pressure difference between the heater and the cooler simultaneously. The pressure difference generated drives the power piston. The experiment was performed to prove validity of the principle and to grasp the output performance of the engine. The fomer was proved, but the output was remained at 2kW, not able to reach the goal of 20kW. The reason the output remained short was investigated. It was found out that it was due to the very short delay of the non-return valve to open, which was used for the intake valve of the low temperature cylinder of the PDG, due to the inertia of its plug. A new valve system without the delay was developed and tested.
