| 摘要 |
<p>A fuel control system for an internal combustion engine including injected fuel quantity estimation includes a fuel pump responsive to a fuel pump command to supply fuel to a fuel collection unit. The fuel collection unit is coupled to a fuel injector in fluid communication with a combustion chamber of the engine. A pressure sensor is provided for producing a pressure signal indicative of the pressure of fuel within the collection unit throughout a fuel injection event, and an engine position sensor is provided for producing an engine position signal indicative of a crank angle of the engine relative to a reference crank angle. A control circuit includes means responsive to the pressure signal and a desired fueling value for producing an initial fueling command, and further includes a fuel quantity estimation block responsive to the pressure signal, the engine position signal and a final fueling command to produce a fuel quantity estimation value. An error signal is computed as a difference between the desired fueling value and the fuel quantity estimation value and is applied to a controller for determination of a fuel adjustment value. The final fueling command is computed by the control circuit as a function of the initial fueling command and the fuel quantity adjustment value to which the injector is responsive to supply fuel to the combustion chamber.</p> |
