| 摘要 |
PURPOSE:To reduce an overcompression amount at a delivery valve part, by a method wherein a valve bed approximately in a cylindrical shape, having a flat part, to which a delivery valve, opening and closing plural valve ports, and a valve press are mounted, is pressed in a press-in hole extended in the axial direction of a cylinder plate. CONSTITUTION:A press-in hole 8a, extended in an axial direction, is formed in a cylinder plate 8, and the one end of each of plural communicating holes 8b communicated to a hole part in the cylinder plate 8, is open to the interior of a press-in hole 8a. A delivery valve 21 and a valve press 22 are attached to a flat part 24 of an approximately cylindrical valve bed 20, pressed in the press-in hole 8a, and the one end of each of plural valve ports 20a, opened and closed by the delivery valve 21, is open. Since, when the valve bed 20 is pressed in the press-in hole 8a so that the other end of the valve port 20a is coincided with the one end of the communicating hole 8b, exhaust gas is exhausted through the plural communicating holes 8b and the valve port 20a, the sectional area of a delivery flow passage is increased, and an overcompression amount is decreased. |
