专利名称：Method and device for fuel injection for
engines
发明人：Yasuhiro Nishiyama申请号：US09/139660申请日：19980825公开号：US06105554A公开日：20000822
摘要：The common-rail type fuel injection method of this invention injects a smallamount of fuel during the deceleration of engine to swiftly accomplish reductions in thecommon rail pressure and the engine revolution speed, thus reducing the amount of NOxat the end of the deceleration. The basic fuel injection amount Qb is determined from theaccelerator control input Acc and the engine revolution speed Ne (step S10). When theactual pressure Pf of the common rail is higher than the target pressure Pf.sub.0 by morethan a predetermined value &agr; (step S11) and also the basic fuel injection amount Qbis smaller than the second fuel injection amount, which is equal to a smaller-than-onefactor k times the first fuel injection amount Qpd that stabilizes the engine revolutionspeed during no-load operation (step S12), then the final fuel injection amount Qfin is setto the second fuel injection amount (step S13) to lower the common rail pressure inorder to avoid fuel injection at high pressure when the accelerator is depressed again.
申请人：ISUZU MOTORS LIMITED
代理机构：Browdy and Neimark, PL
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