公开(公告)号：US20100312455A1

公开(公告)日：2010-12-09

申请号：US12774481

申请日：2010-05-05

Applicant: Hiroyuki YAMASHITA ,  Masatoshi SETO ,  Yusuke KAWAI

Inventor： Hiroyuki YAMASHITA ,  Masatoshi SETO ,  Yusuke KAWAI

IPC: F02D41/30 ,  F02B3/12 ,  F02B17/00

CPC classification number: F02D41/3035 ,  F02D13/0207 ,  F02D13/0265 ,  F02D41/402 ,  Y02T10/128 ,  Y02T10/18 ,  Y02T10/44

Abstract: When it is determined that an engine operating condition is in a high-engine load HCCI range (A2) where an engine load is higher than a specified load X1 within a HCCI range A where a compression self combustion is performed, an after-TDC injection F2s is executed at a point T1 when an internal pressure of a combustion chamber drops below a specified pressure Y after the top dead center of an exhaust stroke during a minus valve overlap period NVO during which intake and exhaust valves are both closed. Then, a main injection F2m as a main injection is executed. Accordingly, any improper detonation or deterioration of NOx emission which may be caused by the compression self-ignition combustion in the range where the engine load is relatively high can be prevented.

Abstract translation: 当确定发动机工作状态处于发动机负荷高于执行压缩自燃的HCCI范围A内的指定负载X1的高发动机负荷HCCI范围（A2）时，TDC后的注入 当在排气门关闭的负阀重叠期间NVO期间，当燃烧室的内部压力下降到排气行程的上止点之后的指定压力Y以下时，在点T1执行F2。 然后，执行作为主喷射的主喷射F2m。 因此，可以防止在发动机负荷相对较高的范围内由压缩自点火燃烧引起的任何不适当的爆炸或NOx排放的恶化。