| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a high-pressure fuel pump structure of an internal combustion engine which can secure a fuel discharge amount without enlarging a size.SOLUTION: A high-pressure fuel pump 1 boosts pressure by using a plunger 3 which reciprocates in a plunger chamber 2 in conjunction with the rotation of a drive cam 10 arranged at a cam shaft 9, and pressure-sends the boosted pressure to fuel injection means. The drive cam 10 is selectively held to a first crest cam 11 which is fastened to the cam shaft 9, a second crest cam 21 which is relatively and rotatably arranged at the first crest cam 11 so as to be coaxial therewith, a reference position in which mutual cam crests 15a, 25a continue to an axial direction with the second crest cam 21 set to face the first crest cam 11, and a movable position in which the cam crest 25a of the second crest cam 21 is located between the adjacent cam crests 15a of the first cam 11.</p> |
