The air-fuel mixture of non-uniform degree acquiring device for an internal combustion engine, and the air-fuel mixture state acquisition device

摘要

PROBLEM TO BE SOLVED: To provide a nonuniformity degree acquiring device of an air-fuel mixture of an internal combustion engine, capable of accurately acquiring a nonuniformity degree of the fuel concentration in an air-fuel mixture by a relatively simple calculation.;SOLUTION: In this device, the air-fuel mixture is assumed as a spherical gas mass aggregate different in a fuel mass percentage. On and after when starting fuel injection, "collision reaction" is performed in order on the whole of optional two combinations among a gas mass existing at that time every time when very small time Δt passes. Thus, the mass distribution of the gas mass in the air-fuel mixture is acquired and updated with every very small time Δt, and a nonuniformity degree of the air-fuel mixture is acquired and updated. "The collision reaction" means "reaction becoming a part or the whole of the other gas mass having a fuel mass percentage different from the fuel mass percentage of the two gas masses, by respectively separating mixed respective parts from a corresponding gas mass, by mixing the respective parts of the two gas masses collided by a collision of the two gas masses different in the fuel mass percentage".;COPYRIGHT: (C)2007,JPO&INPIT