a 4-cylinder, 2-stroke-cycle internal-combustion engine has 600 explosions per minute, what is the engine rpm? Ans. 150 rpm
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If a 4-cylinder, 2-stroke-cycle internal-combustion engine has 600 explosions per minute, what is the engine rpm?
Ans. 150 rpm
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- Explain the working of two-stroke, gasoline-driven internal combustion engine?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…1.Why have eight cylinders in an engine? why not have one big cylinder of the same displacement of the eight cylinders instead? 27. What causes white smoke in two stroke locomotive engines? 28. Why efficiency of gas turbines is lower compared to internal combustion engines?
- 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.QUESTION: 1. What are the 2 types of an Internal Combustion Engines 2. What are its major parts & functions O IIQ2. An automobile has 3.2 liter, four-cylinder, and four-stroke cycle engine operating at 2400 rpm. The spark plug is fired at 20° bTDC and takes 10° of engine rotation to start combustion. Flame termination occurs at 15° aTDC. The exhaust valve opens at 50° bBDC. Calculate the time of 1. Ignition delay? 2. Flame propagation? 3. Exhaust blowdown?
- QUESTION 10 A four-cylinder, 3.6-liter, four-stroke cycles Sl engine operates at 2700 RPM with a volumetric efficiency of 87 %. The fuel used is methyl alcohol. The chemical reaction of methyl alcohol in a Stoichiometric condition is: CH3OH + 1.5(02 + 3.76N2) - CO2 + 2H20 + 1.5(3.76N2) The chemical reaction of methyl alcohol in an equivalence ratio of o = 1.23 is: CH3OH + m(02 + 3.76N2) → NCO2 + pCO + 2H20 + m(3.76N2) During combustion, all hydrogen is converted to water, and all carbon is converted to CO2 and CO. The density of standard air is 2.25 kg/m. The atomic masses are as follows: H=1, C=12, 0-16, and N=14. Calculate the following: m is n is p is Mole fraction of CO in the exhaust is The mass flow rate of air into the engine is gram/s.QUESTION 1 Match the laws accordingly. | 1st law of thermodynamics A. No Heat Engine can be more efficient than a Reversible Heat Engine operating between the same temperature limits 2nd law of thermodynamics (foward engine) B. The internal energy of a perfect gas is a function of the absolute temperature only c. When a system undergoes a complete cycle, the net Heat supplied plus the net Work input is zero. Joules law 3rd law of thermodynamics 2nd law of thermodynamics (reverse engine) D. It is impossible to construct a device that operating in a cycle will produce no effect other than the transfer of heat from a cooler to a hotter body. E. A pure crystalline substance at absolute zero temperature is in perfect order, and its entropy is zero Second law of thermodynamics (Carnot) F. It is impossible for a heat engine to produce a net work output in a complete cycle if it exchanges heat only with a single energy reservoir.A 4-cylinder,100 mm × 100 mm engine turns 1600 rpm. If the mean effective pressure per power stroke is 550 kPa, what is the indicated power of the engine? (a) 30.88 hp (b) 23.04 kW a. b only b. Both a & b are correct c. None of the choices d. a only Show solution. Please answer honestly and do not just guess. Thank you :)
- (d) A generator spins at 3600 rpm. Convert that rotational speed to units of rev/s. (e) A generator spins at 3600 rpm with a torque of 200 N m. In SI units what is the power? (f) An automobile engine produces 94 kW at 6300 rpm. In SI units, what is the torque? (g) An automobile engine produces 221 lb ft of torque at 1800 rpm. In Hp, how much power does this engine produce?A 200-hp engine can deliver, in SI units, an average power of ____. (1 hp = 746 W)b) Explain how the following jet engine works. Refer to each section of the engine and explain the purpose of each section. COMPRESSION COMBUSTION EXHAUST INTAKE Air.Inlet Compression Combustion Chambers Turbine Exhaust Cold Section Hot Section Figure Q4b