| 摘要 |
PURPOSE:To suppress the delivery pressure pulse by lagging the delivery opening position of the delivery stroke due to the cam curve by proper angle while pre- cmpressing the operation chamber prior to opening toward the delivery port. CONSTITUTION:When brought to section (b) of the cam curve due to the rotation of a cylindrical rotor 1, it will perform the inner compression because it is not opened toward the delivery port 8. Consequently the pressure in said operation chamber will increase and when the operation chamber in conducted with the delivery port 8, the pressure in the operation chamber can be brought higher than the oil pressure in the delivery port 8 continuously. As a result, the high pressure oil will not counterflow from the delivery port 8 side thus to suppress the delivery pulse caused by the counterflow of the high pressure oil. |
