| 摘要 |
PURPOSE:To compensate lean conditions of an air-fuel ratio under all operation conditions on a high place by providing an atmospheric pressure compensation value calculation means using, as a parameter, the atmospheric pressure and basic fuel injection, and increasingly compensating fuel injection in an atmospheric compensation value on the high place. CONSTITUTION:A fuel injection controller is provided with a crank angle sensor 20 which detects an engine speed Ne, a pressure sensor 21 which detects the absolute pressure Pm of the pressure of an intake pipe while it is at the downstream side of a throttle valve 10, water temperature sensor 22 which detects a water temperature Tw, an intake temperature sensor 23 which detects an intake temperature Ta, an O2 sensor 24 which detects air-fuel ratio conditions, an atmospheric pressure sensor 25 which detects the atmospheric pressure Pa and the like. Signals thereof are inputted to a control unit 30 and is processed at a D jet type fuel injection control system to output a fuel injection signal of fuel injection pulse width in response to fuel injection, to an injector 16. By this constitution, an atmospheric compensation value calculation means which determines the atmospheric compensation value as a parameter is provided, and thus fuel injection is increasingly compensated according to the atmospheric compensation value on the high place. |
