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- Fig.1 shows the diesel engine cycle. It is very similar to the Otto cycle (presented in thetextbook), but with two important differences. First, the fuel is not added until the air is fully compressed at point 2.This is because at the end of adiabatic compressionthe fuel begins to burn spontaneously (there are no spark plugs in a diesel engine).Second, combustion occurs more slowly and with the fuel being injected continuously.This characterizes the ignition stage as a constant pressure process. The cycle shown inFig.1 has an expansion Vmax - Vmın of 1000 cm^3and compression ratio r = Vmax/Vmın = 21.These are typical values for a diesel-powered truck. The engine operates with air intake(γ = 1, 4) at 25°C and 1 atm. The amount of fuel injected into the cylinder has a heat ofcombustion of 1000 J.a. Find the value of p, V, and T, for each of the vertices of the cycle. Finally, arrange yourresult in a table format.b. What is the total work done by the cylinder in one complete cycle?c. What…id=_26832_1&course_id=_10885_1&content_id%=_625774_1&step%3Dnul Question Completion Status: QUESTION 32 An ideal gas Diesel engine, that has an inlet temperature, pressure and compression ratio of 22 °C and 102 kPa 23:1 respectively. The maximum cycle temperature is 1,214 C. Take Specific heat at constant pressure and constant volume for air as 1.005 kJ/kg K and 0.717 kJ/kg K respectively. Calculate the cutoff ratio to two decimal places. No need to add unit. QUESTION 33 Save All Answe Click Save and Submit to save and submit. Click Save All Answers to save all answers. 9d6d70-5984-1..jpg Type here to searchCan you please help me with ONLY the C,D, and E parts of this question? I would appreciate any insight or explanation on the final 3 parts only. I asked this question already but I got an explanation of the first 3 instead of the final. lol. Thank you! For C, I understand that Th>Ti>Tc, does this mean that since the ec=1-Tc/Th that the efficiency won't change with having two engines because we are using the same temps?
- Q2) Answer only (three) of the following: a) Why should the piston speed be limited in a range between (5 - 15) [m/s]? b) What are the main differences between four stroke and two stroke engines? c) Why always in production of engines the inlet valves are larger than exhaust valves? d) What are the main differences between Otto and Diesel Cycles?B) Why A two stroke cycle engine gives double the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.ient/take/launch.jsp?course_assessment_id=_26832_1&course_id%3_10885_1&content_id3_625774 18step3r * Question Completion Status: Calculate the specific heat rejected during the cycle to one decimal place and include the correct SI unit (J, kg,C). QUESTION 31 An ideal gas Diesel engine, that has an inlet temperature and pressure of 24 °C and 102 kPa respectively with a compression ratio of 22:1. The maximum cycle temperature is 1,260 C. Take Specific heat at constant pressure and constant volume for air as 1.005 kJ/kg K and 0.717 kJ/kg K respectively. Calculate the specific heat received to one decimal place and include the correct SI unit (J..). Save All Ansy Cliek Save and Submit to save and submit. Click Save All Answers to save all answers. 099d6d70-5984-1. jpg- O Type here to search
- a) Why should the piston speed be limited in a range between (5 - 15) [m/s]? b) What are the main differences between four stroke and two stroke engines? c) Why always in production of engines the inlet valves are larger than exhaust valves? d) What are the main differences between Otto and Diesel Cycles?QUESTION 1 An Automotive Engineering company has à task to setup a diesel engine for a new vehicle model. The engine has four-cylinder, four-stroke and 3 liters of displacement volume that operates on the ideal diesel cycle with a compression ratio of 17 as shown in Figure 1. The engine uses light diesel fuel with a heating value of 42,500 kJ/kg and an air-fuel ratio of 24. You are the engineer in the company is given the following task to analyze the engine characteristics based on constant specific heats at 500 K, a) Evaluate all the working temperatures and pressures al all points on P – V diagram. b) Evaluate the thermal efficiency of the cycle. c) If the engine is plan to operate at 3000 rpm, evaluate the power rating produce by the engine. TDC BDC Displacement Clearance volume volume Figure 1Task 1: Your first customer asked for an internal combustion engine to use it in a designed car. Your role is to describe the operation sequence of different types of available engines, explain their mechanical efficiency, and deliver a detailed technical report which includes the following steps: Evaluate the performance of a four-stroke, eight cylinder ideal Diesel cycle with a cylinder bore of 10 cm and a piston stroke of 12 cm when it is operated at 2200 rpm and 4 the air temperature at the beginning of compression prosses is 40 °C if the minimum volume enclosed in the cylinder is 5 percent of the maximum cylinder volume and the cut-off ratio is 1.7 by determining the delivered power from the engine and it's efficiency and comparing your answer if the engine is changed to be two stroke engine.
- ***Show your correct and complete solution neatly. Thank you! *** A Diesel engine operates on the air-standard cycle and has a displacement of 3.5 liters. The engine's compression ratio is 19, and the cutoff ratio is 2.4. The conditions at the beginning of compression are 37 °C, 98 kPaa, and 3.7 liters. If the engine operates at 1500 rpm, determine: a) the compression ratio b) the cycle work c) the power developedThe piston diameter of a 4-cylinder Otto engine is 100 mm and the piston stroke is 90 mm. The compression ratio of this Otto engine, which has a compression ratio of 8 and operates according to the standard air acceptance, is 300K and its pressure is 1 bar. a)Draw the Pv, Ts diagram of the cycle. B)Find the cylinder volume of the engine. C)Calculate the pressures and temperatures at the end of each cycle of the cycle.7. How do you designate the size of an engine? 8. What will be the total piston displacement in a two-cylinder 100 mm x 130 mm engine? 9. If each cylinder of the above engine has a clearance volume equal to one fifth of the total cylinder volume, then compute: a) the clearance volume; b) the compression ratio. 10. Sketch the operation of a four-stroke petrol engine, explaining the events at each stage. How will the events differ from those of a diesel engine? 11. Why is there a power stroke for every down stroke of piston travel in a two-stroke engine? At what interval does the power stroke occur in a four-stroke engine? 12. Assuming a firing order of I four-cylinder engine, complete the events in the other cylinders if the events for cylinder l'are as shown in Table 2.3. 3 2 for a