A six-cylinder, four-stroke cycle SI engine with multipoint fuel injection has a displace-ment of 204 liters and a volumetric efficiency of 87% at 3000 RPM, and operates onethyl alcohol with an equivalence ratio of 1.06. Each cylinder has one port injectorwhich delivers fuel at a rate of 0.02 kg/sec. The engine also has an auxiliary injectorupstream in the intake manifold which delivers fuel at a rate of 0.003 kg/sec to changethe air-fuel ratio and give a richer mixture when needed. When in use, the auxiliaryinjector operates continuously and supplies all cylinders.Calculate: (a) Time of one injection pulse for one cylinder for one cycle. [sec](b) AF if the auxiliary injector is not being used.(c) AF if the auxiliary injector is being used.

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Answered: A six-cylinder, four-stroke cycle SI…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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3 litters, 4 cylinders engine, multipoint port fuel injection, one for each cylinder. AF ratio is 14.6, the volumetric efficiency is 90%. The engine speed at idle condition is 550 rpm with stoichiometric gasoline and inlet pressure is 30 kPa. But the engine speed is 5900 rpm with stoichiometric gasoline of maximum power, the inlet pressure is 101 kPa. Calculate the following: a. mass air flow rate in one cylinder at maximum speed, b. mass fuel flow rate into one cylinder through an injector, c. mass air flow into one cylinder at idle speed, d. mass fuel flow rate into one cylinder at idle speed, e. injection pulse duration is seconds at idle conditions at idle, f. injection pulse duration is degrees of engine rotation at idle conditions.
define the concept of Combustion or reaction efficiency in thecontext of an ICE hybrid engine
What is the injection duration (deg) needed for fuel injection in a single cylinder dieselengine operating at 1500 rpm so that the engine produces 50 kW? The engine bsfc is 0.22kg/kWh. Assume incompressible fuel flow, an average cylinder pressure of 50 bar duringthe fuel injection, an injector effective area ?f = 1.0 mm2, and an injection pressureequal to 550 bar
An 8-cylinder, 4-stroke diesel engine has power output of 368 low at 800 rpm. The fuel consumption is 0.238 kg/kwh. The pressure in the cylinder at the beginning of injectionis 35 bar and max. pressure is 60 bar. The injector is adjusted at 210 bar and max. pressure at in the injector is 600 bar. Calculate orificarea required per injector if the injection takes place over 12° of crank rotation assume Cd = 0.6. p,=0.85.
a. What is the specific brake work (kJ/kgfuel) of a 4 L single-cylinder propane engine operating stoichiometrically, if the heat transfer to the coolant is 17 kW, the air and fuel enter the engine at 298 K, the exhaust is 700 K, and the propane mass flow rate is 1.2 g/s? b. A four-stroke 6 L engine is fueled lean with methane at an equivalence ratio ? = 0.8. It operates at 2000 rpm with a volumetric efficiency of 0.80. The exhaust temperature is 800 K, and the heat transfer to the coolant is 3.4 ×105 kJ/kmolfuel. What is the engine’s thermal efficiency and power?
What is the injection duration (deg) needed for fuel injection in a single cylinder diesel engineoperating at 1450 rpm so that the engine produces 52 kW? The engine bsfc is 0.25 kg/kWh. Assumeincompressible fuel flow, an average cylinder pressure of 60 bar during the fuel injection, an injector effectivearea ?f = 1.5 mm2, and an injection pressure equal to 560 bar.
Why do we need very high pressure for fuel injection in a diesel engine?
An 8-cylinder, 4-stroke diesel engine has power output of 368 kow at 800 rpm. The fuel consumption is 0.238 kg/kwh. The pressure in the cylinder at the beginning of injectionis 35 bar and max. pressure is 60 bar. The injector is adjusted at 210 bar and max. pressure at in the injector is 600 bar. Calculate orific area required per injector if the injection takes place over 12° of crank rotation assume Cd = 0.6, p. = 0.85.
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Compare S.I and C.I engines with respect to ignition and compression ratio
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