THEORETICAL AIR-FUEL RATIO CONTROL METHOD BY PREDICTING INTAKE AIR QUANTITY

摘要

The present invention relates to a method for controlling the theoretical air ratio by predicting the intake air amount, and conventionally, the intake air amount sucked into the engine is measured only by the manifold absolute pressure sensor, so the air amount required by the piston of the engine cannot be predicted. When the fuel is insufficient, there is a problem that the fuel is excessive at the time of sudden deceleration to control the air-fuel ratio to match the theoretical performance ratio.;Accordingly, in the present invention, as shown in FIGS. 1 and 2, the electronic controller 10 receives information from the throttle position sensor, the engine speed sensor, and the manifold absolute pressure sensor 16 to obtain 0b manifold absolute pressure 0c of the next cycle. It is a theoretical air fuel ratio control method by predicting the intake air quantity which predicted and calculated the amount of fuel needed inside a cylinder from the said estimated pressure value, and to be controlled by theoretical air fuel ratio.;Therefore, the present invention can calculate the amount of fuel required inside the cylinder by using the manifold absolute pressure measured when the air is sucked into the cylinder through the intake manifold, the exhaust gas can be reduced, the fuel efficiency can be improved There is.