b) How the process of four-stroke (Spark Ignition and Compression Ignition) operating cycle different based on piston movement, valve position and fluid condition?
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- What defines the combustion chamber of afour-stroke engine?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?Describe with the aid of diagrams the operational sequence of four stroke spark ignition and four stroke compression ignition engines note:Use whatever laws or graphics you need to illustrate the answer
- ? "I What is the ignition advance 3) Why ignition advance is required for SI engine operation?There can be more than 1 answer per item What is the purpose of having piston ring gaps?So that the temperature from the piston can be easily transferred to the cylinder wallsFor easier overhaul proceduresSo that the piston rings will have allowance in the event of thermal expansionSo that oil can freely enter the system The ideal prototype of the spark-ignition engines, constant volume combustion.Diesel cycleOtto cycleBrayton cycleCarnot cycleDescribe a 4-stroke compression ignition engine operation with neat sketches.
- Combustion Engine Question is imageA engine develops power output for each two engine revolution. * Your answer It is the difference in expansion amounts between the cylinder head and pushrod that effectively increases the space between the valve stem and the rocker's arm. * Your answer On a four-stroke cycle reciprocating engine, which strokes are both valves close? * Intake Power Ignition Compression Exhaust It represents the net power output of the engine at the crankshaft. * Your answer If the fuel/air ratio is proper and ignition timing is correct, the combustion process should be completed just after center at the beginning of the power stroke. * Your answerDraw and explain four strokes of Otto cycle based internal combustion engine. Also label various components.
- Auto-ignition might occurs in spark ignition .4 engine at low engine speed because the flame velocity is slow and thus the burn time is long, this results in more time for .auto-ignition .True False O Spark ignition engine with high.5 compression ratio can be used with less possibility of auto-ignition by Increasing the inlet temperature Using low octane number fuel O Using high octane number fuel O Reducing the turbulence motion None of the above Cross-flow (in four stroke engine) from .6 cinlet to exhaust occurs the end of the exhaust stroke and the beginning of the induction stroke when O both valves are close the end of the exhaust stroke and the beginning of the induction stroke when O both valves are open At the end of the intake stroke and the beginning of the exhaust stroke when O both valves are open the end of the exhaust stroke and the beginning of the compression stroke O when both valves are openwhat the difference between four stroke spark ignition engine and tow stroke cycle ?Using the diagram, explain the Two-stroke Cycle Engine. Spark plug wwwwwww Piston Reed valve Intake port Air-fuel inlet Combustion chamber Exhaust port Air-fuel mixture