1-7. Two automobile engines have the same total displacement volume and the same total power produced within the cylinders. List the possible advantages of: (a) A V6 over a straight six. (b) A V8 over a V6. (c) A V6 over a V8. (d) An opposed cylinder four over a straight four. (e) An in-line six over an in-line four.
1-1. List five differences between SI engines and CI engines. 1-2. A four-stroke cycle engine mayor...
What are the advantages of the two stroke engine over the four stroke engines.
A four-cylinder engine with 9.5-cm bore and an 8.75-cm stroke has 10% clearance. The engine rotates at 5500 rpm. The conditions at the beginning of compression are 27°C and 98 kPa. The maximum cycle temperature is 2900°K. The engine may be assumed to operate on an air-standard Otto cycle. Draw the P-V and T-S diagram of the cycle and determine: a) Pressure and Temperature at the end of the expansion process, b) Cycle work, kJ c) Mean Effective Pressure, kPa...
2. (Pts 30) A six cylinder, four stroke, spark ignition engine operating on the ideal Otto cycle takes in air at 1 atm and 18°C, and is limited to a maximum cycle temperature of 871°C. Each cylinder has a bore of 8.9 cm, and each piston has a stroke of 9.9 cm. The top dead center is 14 percent of the bottom dead center. Under these conditions, how much power will this engine produce when operated at 2500 rpm? Use...
1-, - . 11. UN JUURUS NUVC Ucuncul VIC ! 2-2. A four-cylinder, two-stroke cycle diesel engine with 10.9-cm bore and 12.6-cm stroke produces 88 kW of brake power at 2000 RPM. Compression ratio re = 18:1. Calculate: (a) Engine displacement. [cm, L) (b) Brake mean effective pressure. [kPa] (c) Torque. [N-m] (d) Clearance volume of one cylinder. (cm)
A single-cylinder four-stroke-cycle spark-ignition engine has a BSFC of 0.4 kg/kW-hr and a volumetric efficiency of 78% at a speed of 45 rps. The bore is 6 cm and the stroke is 8.5 cm. What is the fuel flow rate, fuel-air ratio, and brake torque if the brake power output is 6 kW with ambient conditions of 100 kPa and 22 C?
2. A 4.8 L, SI, four-stroke, V-8 stationary engine operates at 2000 RPM using gasoline with air/fuel ratio of 14.7. The engine has a volumetric efficiency of 90%, with a bore (B) and stroke (S) related as B:S=1.1:1. You can assume the density of fresh air is 1.16 kg/mº. Please calculate: (30 Points) a) Displacement of each cylinder, and length of stroke; b) Average velocity of piston; (This is a very simple question. You need find the distance piston moved...
Problem 6. Compute the brake mean effective pressure of a four-cylinder, two-stroke engine, 100 mm bore 125 mm stroke when it develops a torque of 490 Nm. Problem = 7. Find the brake thermal efficiency of an engine which consumes 7 kg of fuel in 20 minutes and develops a brake power of 65kW. The fuel has heating value of 42000 kJ/kg. Problem # 8. Find the mean piston speed of a diesel engine running at 1500 rpm. The engine...
1-7. Two automobile engines have the same total displacement volume and the same total power produced within the cylinders. List the possible advantages of: (a) A V6 over a straight six. (b) A V8 over a V6. (c) A V6 over a V8. (d) An opposed cylinder four over a straight four. (e) An in-line six over an in-line four.
Question 2 A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder is 80 mm and the stroke is 100 mm. The indicator diagram shows an indicated mean effective pressure of 7.3 bars. The clearance volume (Vmin) of the engine is 420 cm3 . At the speed of 4100 rpm, the fuel consumption is 19.8 kg/hr and the torque developed is 160 Nm. Calculate: A. Brake power B. The brake mean effective pressure C....
QUESTION 3: (20 marks) a) A single-cylinder, four-stroke cycle Cl engine with 12.9 cm bore and 18 cm stroke operating at 800 RPM, uses 0.113 kg of fuel in four minutes while developing a torque of 75 N-m. Calculate the brake power in kW and hp. (Hint:0(6 marks) nNT 60000