| 摘要 |
PURPOSE:To check variations in an air-fuel ratio as well as to aim at stabilization in a stratified combustion, by installing a suction flow sensor, detecting a suction flow rate, and a control unit setting the fuel injection quantity required for one time combustion, both in a suction passage. CONSTITUTION:A fuel injection valve 16 is adjoined inside a suction passage 8 leading to a combustion chamber 6 via a suction valve 7. A suction flow sensor 17, detecting a suction flow rate, is installed an and around the suction valve 7 at the downstream of a convergent part of suction passages for both high and low load uses. A control unit 19 sets the fuel injection quantity requred for one time combustion from the suction flow detected at an interval from suction valve opening to proir to fuel injection. Thus, even in times of transients and speed variations, a proper fuel quantity commensurate to the actual suction air quantity is feedable so that variations in an air-fuel ratio is checked and stabilization in a stratified combustion is promoted. |
