FUEL INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINE

申请公布号：: JP2013096233(A)
申请号：: JP20110236604
申请日期：: 2011.10.28
申请公布日期：: 2013.05.20
申请人：: HITACHI AUTOMOTIVE SYSTEMS LTD
发明人：: SUKEGAWA YOSHIHIRO;MURAKAMI TOMOYUKI;SARUWATARI MASAYUKI;KANDA KOSUKE
分类号：: F02D41/34;F02D41/22;F02D43/00
主分类号：: F02D41/34
摘要：: <P>PROBLEM TO BE SOLVED: To improve fuel efficiency by preventing incomplete combustion derived due to insufficiency of oxygen even when a large amount of EGR is introduced in a port injection type internal combustion engine. <P>SOLUTION: The internal combustion engine comprises a means for injecting fuel into an intake port and estimating an internal EGR ratio. The ratio between a fuel injection period in an exhaust stroke and a fuel combustion period in an intake stroke is changeable according to the magnitude of the internal EGR ratio estimated by the estimating means for the internal EGR ratio. The EGR ratio is estimated according to the length of a valve overlap period. <P>COPYRIGHT: (C)2013,JPO&INPIT