Homework Answers
Add Answer to:
. A 4 stroke 4 cylinder spark ignition engine runs on a stoichiometric mixture of ethanol and air...
A 6 cylinder, 4-stroke spark ignition engine operates at 5000 RPM. The engine burns gasoline at...
A 6 cylinder, 4-stroke spark ignition engine operates at 5000 RPM. The engine burns gasoline at the rate of 0.01 kg/s. Each cylinder has a stroke of 8 cm and a bore of 6.5 cm. The indicated fuel conversion efficiency is 28%. The brake mean effective pressure is 800 kPa. Calculate the mechanical efficiency and the brake specific fuel consumption for this engine Using text Book: John B. Heywood - Internal Combustion Engine Fundamental 2nd edition
Α 4-stroke spark-ignition engine has a compression ratio of 10 and operates on the ideal constant...
Α 4-stroke spark-ignition engine has a compression ratio of 10 and operates on the ideal constant volume cycle with intake pressure of 50 kPa (throttled) and intake temperature of 300 K. The exhaust pressure is 100 kPa. The heat input from combustion is 2500 kJ/kg and γ = 1.3 for the working fluid. a. Draw the p-V diagram of the full cycle and indicate all the processes. b. Calculate the residual gas fraction and the temperature decrease during the exhaust...
Octane, C8H18, is burned in a 4 cylinder four-stroke spark-ignition engine with a 9:1 compression ratio...
Octane, C8H18, is burned in a 4 cylinder four-stroke spark-ignition engine with a 9:1 compression ratio and bore = 140 mm and stroke = 180 mm turning at a speed of 2400 RPM. The total engine displacement volume is ["11.08", "0.68", "5.54", "2.77"] L and the mean piston speed is ["20.0", "14.4", "7.2", "90.48"] m/s.
In a four-stroke spark ignition engine, calculate the engine speed in RPM if the spark plug...
In a four-stroke spark ignition engine, calculate the engine speed in RPM if the spark plug fires 16 times per second.
2. (Pts 30) A six cylinder, four stroke, spark ignition engine operating on the ideal Otto...
2. (Pts 30) A six cylinder, four stroke, spark ignition engine operating on the ideal Otto cycle takes in air at 1 atm and 18°C, and is limited to a maximum cycle temperature of 871°C. Each cylinder has a bore of 8.9 cm, and each piston has a stroke of 9.9 cm. The top dead center is 14 percent of the bottom dead center. Under these conditions, how much power will this engine produce when operated at 2500 rpm? Use...
Consider a mixture of ethanol (CH3OH) with gasoline for use as a spark-ignition engine fuel. Assume...
Consider a mixture of ethanol (CH3OH) with gasoline for use as a spark-ignition engine fuel. Assume that the mixture contains 40 % ethanol by volume, whereas gasoline has a molecular weight of 105 kg/kmol and contains 86 % carbon and 14 % hydrogen on a mass basis. Calculate the stoichiometric air/fuel ratio on a mass basis for this fuel mixture.
A four-stroke 2.0 Litre compression ignition engine operates on a Diesel cycle with a compression ratio...
A four-stroke 2.0 Litre compression ignition engine operates on a Diesel cycle with a compression ratio of 20 and a cut-off ratio of 1.8. Air is at 30°C and 100 kPa at the beginning of the compression process. It may be assumed that for the air, the specific heat, Cp and gas constant, R are 1.005 and 0.287 kJ/kg.K, respectively. Calculate: the temperature (K) of the air at the end of the following processes: (i) (a) compression (ii) combustion, (ii...
A 4 stroke spark ignition engine gave the following results during a test. Number of cylinders...
A 4 stroke spark ignition engine gave the following results during a test. Number of cylinders 6 Bore of cylinders 90 mm Stroke 80 mm Speed 5000 rev/min Fuel consumption rate 0.3 dm/min Fuel density 750 kg/m Calorific value 44 MJ/kg Net brake load 180 N Torque arm 0.5 m Net indicated area 720 mm Base length of indicator diagram 60 mm Pressure scale 40 kPa/mm Calculate the following. The Brake Power. ii) The Mean effective Pressure. The Indicated Power....
Problem 6. Compute the brake mean effective pressure of a four-cylinder, two-stroke engine, 100 mm bore...
Problem 6. Compute the brake mean effective pressure of a four-cylinder, two-stroke engine, 100 mm bore 125 mm stroke when it develops a torque of 490 Nm. Problem = 7. Find the brake thermal efficiency of an engine which consumes 7 kg of fuel in 20 minutes and develops a brake power of 65kW. The fuel has heating value of 42000 kJ/kg. Problem # 8. Find the mean piston speed of a diesel engine running at 1500 rpm. The engine...
1. A 12-cylinder, 4-stroke automobile engine is being designed. What type of cylinder arrangement would you...
1. A 12-cylinder, 4-stroke automobile engine is being designed. What type of cylinder arrangement would you recommend? (a) In-Line (b) V-Type (c) W-Type (d) Rotary. 2. The expression "cylinder cut-out" means : (a) Half of cylinder volumes is used. (b) Half of cylinder numbers is used. (c) Half of cylinder masses is used. (d) None of the above. 3. Adding lubrication oil to the inlet fuel- air mixture in 2-st engines will increase: (a) HC emissions. (b) CO emissions (c)...
2. (Pts 30) A six cylinder, four stroke, spark ignition engine operating on the ideal Otto cycle takes in air at 1 atm and 18°C, and is limited to a maximum cycle temperature of 871°C. Each cylinder has a bore of 8.9 cm, and each piston has a stroke of 9.9 cm. The top dead center is 14 percent of the bottom dead center. Under these conditions, how much power will this engine produce when operated at 2500 rpm? Use...
Consider a mixture of ethanol (CH3OH) with gasoline for use as a spark-ignition engine fuel. Assume that the mixture contains 40 % ethanol by volume, whereas gasoline has a molecular weight of 105 kg/kmol and contains 86 % carbon and 14 % hydrogen on a mass basis. Calculate the stoichiometric air/fuel ratio on a mass basis for this fuel mixture.
A four-stroke 2.0 Litre compression ignition engine operates on a Diesel cycle with a compression ratio of 20 and a cut-off ratio of 1.8. Air is at 30°C and 100 kPa at the beginning of the compression process. It may be assumed that for the air, the specific heat, Cp and gas constant, R are 1.005 and 0.287 kJ/kg.K, respectively. Calculate: the temperature (K) of the air at the end of the following processes: (i) (a) compression (ii) combustion, (ii...
A 4 stroke spark ignition engine gave the following results during a test. Number of cylinders 6 Bore of cylinders 90 mm Stroke 80 mm Speed 5000 rev/min Fuel consumption rate 0.3 dm/min Fuel density 750 kg/m Calorific value 44 MJ/kg Net brake load 180 N Torque arm 0.5 m Net indicated area 720 mm Base length of indicator diagram 60 mm Pressure scale 40 kPa/mm Calculate the following. The Brake Power. ii) The Mean effective Pressure. The Indicated Power....
Problem 6. Compute the brake mean effective pressure of a four-cylinder, two-stroke engine, 100 mm bore 125 mm stroke when it develops a torque of 490 Nm. Problem = 7. Find the brake thermal efficiency of an engine which consumes 7 kg of fuel in 20 minutes and develops a brake power of 65kW. The fuel has heating value of 42000 kJ/kg. Problem # 8. Find the mean piston speed of a diesel engine running at 1500 rpm. The engine...
1. A 12-cylinder, 4-stroke automobile engine is being designed. What type of cylinder arrangement would you recommend? (a) In-Line (b) V-Type (c) W-Type (d) Rotary. 2. The expression "cylinder cut-out" means : (a) Half of cylinder volumes is used. (b) Half of cylinder numbers is used. (c) Half of cylinder masses is used. (d) None of the above. 3. Adding lubrication oil to the inlet fuel- air mixture in 2-st engines will increase: (a) HC emissions. (b) CO emissions (c)...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago