公开(公告)号：EP2108804A1

公开(公告)日：2009-10-14

申请号：EP08425229.5

申请日：2008-04-08

申请人： MAGNETI MARELLI POWERTRAIN S.p.A.

发明人： Ruggiano, Renzo ,  Sitta, Ugo ,  Fanton, Fabrizio

IPC分类号： F02D41/40 ,  F02D41/24

CPC分类号： F02D41/402 ,  F02D41/1454 ,  F02D41/2438 ,  F02D41/2441 ,  F02D41/247 ,  F02M65/00 ,  Y02T10/44

摘要： A method for determining the actual offset value of an injector (5) of an internal combustion engine (1); the method includes the steps of: determining, at a stationary rate, a target injection time (T inj ) for the injector (5); driving the injector (5) to perform a single injection having a duration equal to the target injection time (T inj ); subsequently driving the injector (5) to perform n subsequent sub-injections, each having a duration equal to one n-th of the target injection (T inj ); measuring the exhaust gas titre (λ 1 ) by performing the single injection; measuring the exhaust gas titre (λ 2 ) by performing the n sub-injections; and determining the actual offset value (T offset ) of the injector (5) according to the variation of the exhaust gas titre by performing the single injection and by performing the n sub-injections.

摘要翻译： 一种用于确定性采矿方法的内燃发动机（1）的喷射器（5）的实际偏移量; 该方法包括以下步骤：用于注射器（5）确定的挖掘，在固定速率，目标喷射时间（T INJ）; 驱动喷射器（5）执行具有等于目标喷射时间（T INJ）的持续时间的单次注射; 随后驱动喷射器（5）执行n次后续子喷射，每个具有等于目标喷射（为T inj）的n分之一的持续时间; 测量废气滴定率（»1）通过执行单次喷射; 测量废气滴定率（“2）通过执行第n子喷射; 和确定性采矿实际偏移量通过执行单次喷射和通过执行n次子喷射（T偏移）喷射器（5）的雅丁到废气滴定率的变化情况。