| 摘要 |
<p>An internal combustion engine includes a low-pressure fuel feed, system (81) that feeds low-pressure fuel pressurized by a feed pump (84) to first delivery pipes (64, 65) through a low-pressure fuel feed pipe (85), first injectors (62, 63) capable of injecting the low-pressure fuel into intake ports (24, 25), a high-pressure fuel feed system (82) that feeds high-pressure fuel pressurized by a high-pressure pump (91) to second delivery pipes (68, 69) through a high-pressure fuel feed pipe (92), and second injectors (66, 67) capable of injecting the high-pressure fuel into combustion chambers (22, 23). A bypass passage (97) communicates the first delivery pipe (65) with the second delivery pipe (97), and a check valve (98) is provided in the bypass pipe (97) for preventing flow of the fuel from the second delivery pipe (68) to the first delivery pipe (65). Thus, transmission of fuel pressure pulsation caused by driving of the high-pressure pump is effectively restricted, so that an appropriate amount of fuel can be supplied to the engine for improved control of the air/fuel ratio.</p> |
