| 摘要 |
With reference to Figure 6, the present invention provides an apparatus for controlling, within an internal combustion engine (600), a fuel injection period during which a fuel is injected into charge air to form a fuel/air mixture for combustion. The apparatus comprises: ```a pressure sensor (204) operable to detect a pressure of the charge air; ```a control unit (206) responsive to the pressure detected by the pressure sensor (204), the control unit being operable to detect a change in the pressure detected by the pressure sensor and to control the fuel injection period in dependence upon the time at which one or more of the detected pressure changes occurs; and ```a fuel injector (116) controlled by the controller. The pressure sensor(204), the control unit (206) and the fuel injector (116) are formed as a unitary fuel injection controller. The time at which the fuel injection period starts is controlled solely in dependence upon the time at which the pressure sensor (204) detects a pressure change. The system is cheap and simple, suitable for small engines such as used in engine-powered gardening tools. |
