| 摘要 |
<p>Disclosed a common-rail, fuel-injection system in which an actual quantity(Qa) of fuel injected is found in consideration for a quantity(Ql) of dynamic fuel leakage, thereby making it possible to inject a desired quantity(Qb) of fuel per cycle in accordance with the engine operating conditions. A quantity of fuel to be supplied from the common rail(2) is found from a first mapped data defined previously, in conformity with a common-rail pressure(Pch) and a difference ( DELTA Pc) in pressure taking place between the common-rail pressures just before and after the fuel injection. Moreover, a quantity(Ql) 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(Pw) for controlling the fuel injection. The actual quantity(Qa) of fuel injected is found by subtracting the quantity(Ql) of dynamic fuel leakage from the quantity(Qf) of fuel supplied and the fuel injection is controlled so as to correct the consequent actual quantity of fuel injected to a desired quantity(Qb) of fuel injected. <IMAGE></p> |
