| 摘要 |
To provide a high-pressure pump that can achieve a balance between fuel feeding efficiency and reliability with respect to sealing performance and resistance to valve sticking. A high-pressure pump is equipped with a valve element configured to include a seat portion that has a seat surface seated on a seating surface of a peripheral edge of an opening of a valve element insertion hole, a stem portion that extends in an axial direction from the seat portion, and plural guide vane portions that have sliding contact surfaces in sliding contact with an inner peripheral surface of the valve element insertion hole and are placed at predetermined intervals apart from each other in a circumferential direction around the stem portion, wherein fuel flow paths are defined by the guide vane portions adjacent to each other in the circumferential direction and the inner peripheral surface of the valve element insertion hole, on one surface of both circumferential direction side surfaces of each of the guide vane portions, there are disposed projecting surfaces that are formed in such a way as to project toward the fuel flow paths and are for allowing fuel passing through the fuel flow paths to impact thereon to thereby convert the kinetic energy of the fuel into an axial rotational force on the valve element, and when the valve element is seen in the axial direction, centerlines (L1) of the width of sections of the guide vane portions at which the width is the narrowest are positioned on the projecting surface sides of parallel lines (L2) that are parallel to the centerlines (L1) and pass through a stem core of the stem portion. |
