1. A four-stroke cycle engine with 4.0 [1] displacement and 11-1 compression ratio produces 250 [kW]...

 

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1. A four-stroke cycle engine with 4.0 [1] displacement and 11-1 compression ratio produces 250 [kW] (indicated) at 6000 [rpm] running with d=1.0 on gasoline (QLV = 43,000 [KJ/kg], F/Astoich = 0.0685) 2. 3. a. Assuming vol = 0.9 (use standard atmospheric conditions for the reference density) calculated the air trapped per cycle and show that the fuel delivered per cycle is 2.657 x10 [kg]. b. Calculate the net indicated efficiency. C. Calculate the net indicated efficiency and peak pressure and temperature using an ideal cycle model using constant volume heat release. Assume constant specific heat computed from k= 1.35 and R= 0.280 [kJ/kg K] and assume the exhaust and intake pressures are equal to 108 and 99.5 [kPa], respectively. d. Name three reasons why the ideal cycle efficiency is considerably higher than the measured efficiency Estimate the power of a 3.0[1] 4-stroke engine running at 6000[rpm] burning gasoline fuel (same properties as above). Assume nfc-0.3, nmech=0.95, p=1.0, vol=0.85. Calculate the ideal and actual mass flow rates for a port being tested on a flow bench with a discharge coefficient (based on limiting area) and port diameter of 0.85 and 5 [cm] respectively, when the lift and pressure drop are respectively 8 [mm] and 30" of water. Recalculate the discharge coefficient and equivalent loss coefficient (k) based on the port area. 1. A four-stroke cycle engine with 4.0 [1] displacement and 11-1 compression ratio produces 250 [kW] (indicated) at 6000 [rpm] running with d=1.0 on gasoline (QLV = 43,000 [KJ/kg], F/Astoich = 0.0685) 2. 3. a. Assuming vol = 0.9 (use standard atmospheric conditions for the reference density) calculated the air trapped per cycle and show that the fuel delivered per cycle is 2.657 x10 [kg]. b. Calculate the net indicated efficiency. C. Calculate the net indicated efficiency and peak pressure and temperature using an ideal cycle model using constant volume heat release. Assume constant specific heat computed from k= 1.35 and R= 0.280 [kJ/kg K] and assume the exhaust and intake pressures are equal to 108 and 99.5 [kPa], respectively. d. Name three reasons why the ideal cycle efficiency is considerably higher than the measured efficiency Estimate the power of a 3.0[1] 4-stroke engine running at 6000[rpm] burning gasoline fuel (same properties as above). Assume nfc-0.3, nmech=0.95, p=1.0, vol=0.85. Calculate the ideal and actual mass flow rates for a port being tested on a flow bench with a discharge coefficient (based on limiting area) and port diameter of 0.85 and 5 [cm] respectively, when the lift and pressure drop are respectively 8 [mm] and 30" of water. Recalculate the discharge coefficient and equivalent loss coefficient (k) based on the port area.

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a A fourstroke cycle engine with 40 1 displacement and 111 compression ratio produces 250 kW indicated at 6000 rpm running with 010 on gasoline QLV 43000 KJkg FAstoich 00685 The net indicated power ou... View the full answer