| 摘要 |
A method of operating a four stroke internal combustion engine consisting of a controlled recirculation of the combusted gases to the intake which enables combustion to be initiated by auto- or self-ignition by means of a pipe 8, i.e. external EGR, linking an exhaust pipe 7 to at least one intake pipe 6. The method consists at part load of inducting a large quantity of combusted gases, EGR, into a combustion chamber 1 via a first intake means 3,30 and subsequently inducting a fresh mixture of air and fuel in to the combustion chamber via a second intake means in order to produce a stratified charge. Preferably the EGR pipe 8 may be thermally insulated and the fresh mixture may be heated, if it is at a temperature below a predetermined value, in order to assist auto-ignition. The method may be used in conjunction with a conventional spark ignition system. |
