发明名称 |
Combustion control device |
摘要 |
For providing a combustion control device capable of decreasing unburned HC caused by a fuel attaching to a bore wall of a cylinder and unburned HC/CO produced by excessive diffusion of the fuel in premixed charge compression ignition combustion, an injector control unit controls an injector so as to start an initial fuel injection when a crank angle corresponds to an initial fuel injection start time when a piston arrives at such a position that the fuel injected from the injector reaches a lip but falls short of reaching a bore wall face of a cylinder, and terminate a final injection when the crank angle corresponds to a final fuel injection end time, when the piston arrives at such a position that the fuel injected from the injector reaches the lip but falls short of reaching a region below the lip in a cavity. |
申请公布号 |
US9032930(B2) |
申请公布日期 |
2015.05.19 |
申请号 |
US201213444414 |
申请日期 |
2012.04.11 |
申请人 |
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI |
发明人 |
Kuzuyama Hiroshi |
分类号 |
F02B17/00;F02D41/40;F02D41/30;F02B23/06;F02D41/04;F02B1/12;F02M25/07 |
主分类号 |
F02B17/00 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC |
主权项 |
1. A combustion control device for an engine having a piston disposed so as to be able to move up and down in a reciprocating manner within a cylinder and performing premixed charge compression ignition combustion, the device comprising:
a fuel injection valve for injecting a fuel into a combustion chamber formed by the cylinder and piston; and injection valve control means for controlling the fuel injection valve so as to inject the fuel a plurality of times in portions; wherein an upper part of the piston is provided with a recessed cavity forming a part of the combustion chamber; wherein an upper end part of an inner wall face of the piston forming the cavity is provided with a lip projecting inwardly of the piston; wherein the injection valve control means has first control means for controlling the fuel injection valve so as to start an initial fuel injection when the piston arrives at a first elevation point before a compression top dead center and second control means for controlling the fuel injection valve so as to terminate a final fuel injection by the time when the piston arrives at a second elevation point located closer to the compression dead center than is the first elevation point; wherein the first elevation point is such a position that the fuel injected from the fuel injection valve reaches the lip but falls short of reaching a bore wall of the cylinder; and wherein the second elevation point is such a position that the fuel injected from the fuel injection valve reaches the lip but falls short of reaching a region under the lip in the cavity. |
地址 |
Aichi-ken JP |