Briefly explain the necessity of counterweights located on the crankshaft when the engine is naturally balanced with respect to mass forces.
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Briefly explain the necessity of counterweights located on the crankshaft when the engine is naturally balanced with respect to mass forces.
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- What is the power (?) lost to main crankshaft friction in a four-cylinder engine with a 100mmbore and stroke if the engine is operating at 1500 rpm? Assume the main crankshafthas five bearings, each with a diameter of 50 mm and length of 25 mm.In most of internal combustion engines, crankshaft bearing is Select the correct answer below: A. Ball bearings B. Hydrodynamic journal bearing C. Roller Bearings D. Hydrostatic journal bearingShow complete solution.
- Sketch and Describe a timing diagram for a 2 stroke diesel engine3. An 8-cylinder, 450 mm x 600 mm, 4 stroke cycle diesel engine has an exhaust gas mass rate of 4.5 kg/kw-hr brake based on fuel having air-fuel ratio of 20 to 1 and heating value of 10,540 kcal/kg. Engine speed is 260 rpm with brake mean effective pressure of 9.25 kg/cm2 An estimated 22% energy loss is carried away by the jacket cooling water. Calculate the brake horsepower. B. 2011 BHP C. 2310 BHP D.2910 BHPa. Explain the relationship between the amount of fuel injected in a diesel engine cylinder and the amount of torque produced by the diesel engine? Include in your answer a sketch of the combustion pressure/crank angle graph, and a sketch of the piston/connecting rod and crankshaft arrangement?
- What do you mean by I.C.R.? What are the formulae for calculating I.C.R for all mechanisms? How will you find I.C.R. of velocity for 4 bar chain mechanisms and single slider crank mechanism? How will you find graphically & analytically the methods of velocity & acc. Analysis of 4-bar chain mechanism and single slider crank mechanism?VC Vc B S TDC -BDC S TQ Tp = Pg A (asne) [1+ % CUSA] At what position (in degrees after top dead center) would you want the peak pressure of combustion to occur to create the maximum torque on the crankshaft? For a 100mm piston digimeter acting on a connecting. rod with a length of 80mm use the equation above to calculate the torque (NIM) on the crankshaft at this crank position for an engine that develops a peak pressure of 135 barCalculate the amount of fuel required per cylinder per stroke for a 1500 cc SI engine running at 4000 rpm and stoichiometric air fuel ratios. Assume pumping losses to be 24%