| 摘要 |
Disclosed a common-rail, fuel-injection system in which an actual quantity of fuel injected is found in consideration for a quantity of dynamic fuel leakage, thereby making it possible to inject a desired quantity of fuel per cycle in accordance with the engine operating conditions. A quantity of fuel to be supplied from the common rail is found from a first mapped data defined previously, in conformity with a common-rail pressure Pch and a difference DELTAPc in pressure taking place between the common-rail pressures just before and after the fuel injection. Moreover, a quantity of dynamic fuel leakage is found from a second mapped data defined previously, in conformity with a common-rail pressure Pch just before the fuel injection and a command-pulse width for controlling the fuel injection. The actual quantity of fuel injected is found by subtracting the quantity of dynamic fuel leakage from the quantity of fuel supplied and the fuel injection is controlled so as to correct the consequent actual quantity of fuel injected to a desired quantity of fuel injected.
|
