| 摘要 |
1,049,656. Charging I.C. engines; exhaust gas turbines. SCHWITZER CORPORATION. Aug. 1, 1963 [Oct. 1, 1962], No. 30479/63. Headings FIB and F1G. In a system for controlling the exhaust gas pressure delivered to the turbine 16, Fig. 1 of an I.C. engine turbocharger, the exhaust gases are by-passed around the turbine to hold its speed down until the full lubricating pressure exists. Exhaust gases from manifold 12 are normally ducted directly to turbine 16 which drives compressor 18 to supply charging air to inlet manifold 11. A valve 32 controls the bypassing of exhaust gases through passage 28 to the turbine outlet. An oil supply line 66a, 66b to bearings 63, 64 also supplies oil pressure to chamber 68, excess oil being returned to sump 71. The charging air pressure in passage 27 is communicated to chamber 49 through passages 72a, 72b and a spring-loaded valve 74. When the engine is started valve 32 is normally open to by-pass the turbine until rising oil pressure in chamber 68 acts on wall 53, Fig. 3 (not shown), spring 59 and wall 48 to close valve 32. At excessive charging air pressure valve 74 opens to admit air pressure to chamber 49. This acts on wall 48 which is connected to valve 32 thereby moving the latter to the by-pass position. |
