Control device of internal combustion engine

Abstract

A control device of an internal combustion engine, wherein a throttle valve passing air flow calculation expression for indicating a throttle valve passing air flow (mt) as the function of a downstream side intake tube inner pressure on the downstream side of a throttle valve and a cylinder intake air flow calculation expression for indicating a cylinder intake air flow (mc) as the function of the downstream side intake tube inner pressure calculates the downstream side intake tube inner pressure (Pm) and the cylinder intake air flow (mc) when the throttle valve passing air flow (mt) obtained by using the throttle valve passing air flow calculation expression agrees with the cylinder intake air flow (mc) obtained by using the cylinder intake air flow calculation expression as a downstream side intake tube inner pressure (Pmta) and a cylinder intake air flow (mcta) when the engine is stationarily operated under the operating conditions when the air flow (mt) agrees with the air flow (mc).

Description

technical field [0001] The invention relates to a control device for an internal combustion engine. Background technique [0002] In recent years, studies have been made of modeling an intake system of an internal combustion engine based on fluid mechanics and the like, and controlling the internal combustion engine based on parameters calculated using the model. That is, for example, for the air intake system of an internal combustion engine, a throttle model, an intake pipe model, an intake valve model, etc. are constructed, and the above-mentioned various models are used to calculate the amount of air filled in the cylinder according to the throttle opening, atmospheric pressure, and atmospheric temperature. etc., and control the internal combustion engine accordingly. [0003] However, when the internal combustion engine is controlled, especially when the internal combustion engine is controlled using the model as described above, in order to calculate the parameters re...

AI Technical Summary

Problems solved by technology

[0005] However, actually it takes a lot of time to create the above map

That is, in order to create a map, it is necessary to sequentially change the respective variables and measure the above-mentioned Pmta or mcta, which is a very complicated work.

In addition, it is possible to increase the map retrieval operation due to the increase in the number of necessary maps or arguments, increasing the control load