Method of controlling quantity of operation of operation control means for internal-combustion engine

Abstract

Abstract PURPOSE:To obtain a proper operation quantity corresponding to the temperature of intake air, by determining an intake-air temperature correction value from the engine speed and the temperature of intake air, and correcting a base control value for the operation quantity of an engine operation control means on the basis of said correction value. CONSTITUTION:In operation of an engine, an engine control unit (ECU) 5 calculates a base fuel injection period Ti on the basis of the absolute pressure in an intake pipe detected by an absolute pressure sensor 8 and the engine speed detected by an engine- speed sensor 11 and controls a fuel injection valve 6 according to the final fuel injection period TOUT obtained by correcting the base fuel injection period Ti by use of an intake-air temperature correction factor or other correction factors. Here, since the weight flow rate of intake air is decreased with rise of the intake-air temperature detected by an intake-air temperature sensor 9, the aforesaid intake-air temperature correction factor is set at a value to decrease the fuel supply rate with rising of the intake-air temperature. Further, when the temperature of intake air is higher than a reference value (about 30 deg.C), the intake-air temperature correction value is determined on the basis of the absolute pressure in the intake pipe.

Inventors

• 👤 Akihiko Koike
• 👤 明彦 小池
• 👤 Toshiyuki Suga
• 👤 須賀　稔之

Bibliographic Details