| 摘要 |
PURPOSE:To restrain a sudden torque variation in starting a compressor, ensure stable engine running and prevent engine stall at the time of idling, and prevent the occurrence of an impact noise and abnormal wear at an engine start. CONSTITUTION:A cylinder chamber 36 is formed on the internal surface of a boss section for a rotor 40. A shaft 7 is provided with a high-pressure introduction passage 35 for introducing delivery gas from a delivery chamber 10 to the cylinder chamber 36. Also, the shaft 7 is so fitted with an annular piston 37 as to be freely slidable, and the piston 37 is loosely coupled to the cylinder chamber 36 in such a way as pressing a spring 46, according to a pressure rise in the chamber 36. High-pressure guide passages 28, 29, 26b and 32 are provided in a cylinder block 2 for introducing delivery gas from the delivery chamber 10 to the high-pressure introduction passage 35. Furthermore, the high- pressure guide passages 28, 29, 26b and 32 are fitted with spool valves 27 at intermediate sections to open and close according to a pressure difference between intake pressure Ps and delivery pressure Pd, and to close the passages, when the delivery pressure Pd rises to such an level as causing the pressure difference equal to or above the predetermined value. |
