| 摘要 |
An internal combustion engine 1 is an internal combustion engine of a compression ignition type. A bottom wall surface 311 has a pent-roof shape, and a bottom wall surface 712 has a protruding shape corresponding to the pent-roof shape. A piston 7 includes a squish portion S having a taper shape TP. The taper shape TP includes a bottom end portion TPB located on a side wall surface of a cavity 71 which a circumferential edge portion 711 includes. An injection hole 611C injects fuel to a region E3, and an injection hole 611A injects fuel to a region E1. An injection angle ±3 of the injection hole 611C is set smaller than an injection angle ±1 of the injection hole 611 A. A squish portion S1 is a portion, of the squish portion S, adjacent to the region E3, and a squish portion S2 is a portion, of the squish portion S, adjacent to the region E1. A height Hs of the squish portion S1 is lower than that of the squish portion S2. |
