| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a means for accelerating the activation of a catalyst effective in reducing the discharge of NOx and PM while suppressing the degradation of heat efficiency (fuel consumption), and a means for realizing premixed combustion effective in reducing the discharge of NOx and PM while suppressing the degradation of heat efficiency (fuel consumption). <P>SOLUTION: This intake system device for a cylinder injection compression-ignition type engine is provided with a plurality of intake valves 15a, 15b for each cylinder; intake ports 17a, 17b and intake manifolds 18a, 18b by systems corresponding to the intake valves 15a, 15b; branch passages 20a, 20b for connecting an upstream side intake passage 19 respectively to the respective manifolds 18a, 18b; an intake cut-off valve 21 for opening/closing at least one of the branch passages 20a, 20b; and a valve mechanism (camshafts 42, 43) for opening/closing the intake valves 15a, 15b by systems at different timings. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
