| 摘要 |
PURPOSE:To provide a two-point ignition engine for which deterioration of emission or knocking is not generated lamination can be promoted by concentrating around an ignition plug in a low load range fuel consumption performance can be improved. CONSTITUTION:An opening/closing valve 12 is closed and a strong swirl is generated inside a combustion chamber 4 in a low load range, and fuel is injected from a fuel injection valve 11 toward a first ignition plug 9 arranged in the central part of the combustion chamber 4, and lamination of air-fuel mixture is promoted and then fuel consumption performance is improved. Here at, when air-fuel-mixture layer gets cut of the vicinity of the first ignition plug 9 by influence of the swirl, rich air-fuel-mixture is surely ignited by a second ignition plug 10, and emission performance or a anti-knocking property is improved. Swirls and tumbles become confluent so as to generate and oblique swirl in a high load range, and then charging efficiency is improved, and output of an engine is improved. |
