14c-2級比例閥概念及應用.ppt

比例閥課程 兩級比例閥 2口洩壓閥 (RP*C-8**) 2口洩壓閥 (RP*C-8**) 操作原理 2口洩壓閥 (RP*C-8**) 型號結構 3口洩壓閥 (RS*C-8**) 3口洩壓閥 (RS*C-8**) 操作原理 3口洩壓閥 (RS*C-8**) 型號結構 4口洩壓閥 (RV*D-8**) 4口洩壓閥 (RV*D-8**) 操作原理 4口洩壓閥 (RV*D-8**) 型號結構 4口複合閥 (HVC*-8**) 4口複合閥 (HVC*-8**) 操作原理 4口複合閥 (HVC*-8**) 型號結構 性能資料 性能資料 T-10A 轉 T-8A 插孔轉接頭 3口減壓閥 (PB*B-8**) 3口減壓閥 (PB*B-8**) 操作原理 3口減壓閥 (PB*B-8**) 型號結構 3口減/洩壓閥 (PP*B-8**) 3口減/洩壓閥 (PP*B*-8**) 操作原理 3口減/洩壓閥 (PP*B-8**) 型號結構 4口減/洩壓閥 (PV*A-8**) 4口減/洩壓閥 (PV*A-8**) 操作原理 4口減/洩壓閥 (PV*A-8**) 型號結構 性能資料 性能資料 性能資料 性能資料 訂購型號結構 - 各別 訂購型號結構 - 整組 閥体例 疊式閥体例 閥体例 疊式閥体例 閥体例 疊式閥体例 閥体例 疊式閥体例 閥体例 板式閥体例 閥体例 板式閥体例 比例閥課程 應用例 Introduction Mandated vehicular noise limits (Member EU States) Diesel exhaust emission standards Diesel Engine Regulations Heavy duty Highway Engines (GVWR 8,500 lbs) October 2002 “Pull Ahead” Emission Levels 2.4 g/bhp-hr NMHC + NOX 50% Reduction from Previous Levels Emission Control Strategy VGT Turbo Charging Electronic Profile Injection Increased Turbo Intercooling Cooled EGR Diesel Engine Regulations Diesel Engine Regulations Downside of Emission Control Strategy Increased Cooling System Load Loss of Engine Efficiency Increased Fuel Consumption 2007 Heavy Duty “Highway Engines” (GVWR 8,500 lbs) Phase in 2007 through 2010 0.34 g/bhp-hr NMHC + NOX (Feasible???) Diesel Fuel Sulphur 15 ppm (was 500 ppm) Cooled EGR Diesel Engine Regulations Off Road Engines (Construction / Agricultural / Genset Tier 3 phased in between 2004 and 2006 3.0 g/bhp-hr NMHC + NOX 50% Reduction from Tier 2 Will require control strategies similar to heavy duty highway engines to meet standards. Locomotives Tier 3 2005 5.8 g/bhp-hr NMHC + NOX 45% Reduction from Tier 2 Control Strategy Uncertain Hydraulic Fan Drives More Flexibility in Cooling System Layout Reduced Operating Noise Levels Operates on Demand Fan Reversal Easy (useful for Agricultural Operations) Improves Fuel Efficiency Power Source (Hydraulics) Already on Board Control Signals Available from ECM Excerpts from D