Homework Answers
3. A six cylinder, four-stroke cycle SI engine with multipoint fuel injection has a displacement of...
3. A six cylinder, four-stroke cycle SI engine with multipoint fuel injection has a displacement of 2.4 liters (0.0024 m). The engine operates on a hydrocarbon fuel with H/C = 1.9 and MW =105 kg/kmol, at an equivalence ratio of 1.05. Each cylinder has one fuel injector fired once per cycle. The flow rate for the injector when continuously open is 0.003 kg/s. Consider the wide-open throttle, peak power operating point where the design volumetric efficiency is 90% and the...
2. A 4.8 L, SI, four-stroke, V-8 stationary engine operates at 2000 RPM using gasoline with...
2. A 4.8 L, SI, four-stroke, V-8 stationary engine operates at 2000 RPM using gasoline with air/fuel ratio of 14.7. The engine has a volumetric efficiency of 90%, with a bore (B) and stroke (S) related as B:S=1.1:1. You can assume the density of fresh air is 1.16 kg/mº. Please calculate: (30 Points) a) Displacement of each cylinder, and length of stroke; b) Average velocity of piston; (This is a very simple question. You need find the distance piston moved...
Assume combustion equivalence ratio is 1, engine speed 5000 rpm. calculate a. volume at TDC; b. V...
Assume combustion equivalence ratio is 1, engine speed 5000 rpm.
calculate
a. volume at TDC;
b. Volume at BDC;
c. Compression Ratio;
d. Half stroke to rod ratio ( a/I )2. write the combustion
equations for the stoichiometric reaction
number of cylinders bore, b, 6 88.74mmm iston drop from short block @TDC. у0 TDC 0.29mm iston drop from short block @BDC. у0 BDC thickness of head gasket, y HG volume of clay in head, VO volume of clay in short...
(23%) A four-cylinder petrol engine with a bore of 63 mm and a stroke of 76 mm was tested at full...
Looking for an answer to 13.9. Which uses information from
13.8
(23%) A four-cylinder petrol engine with a bore of 63 mm and a stroke of 76 mm was tested at full throttle at 3000 rev/min over a range of mixture strengths. The following readings were taken during the test: 13.8 4 162 165.5 169 170 169 162 159 Brake load/(N) Fuel consumption/(ml/s) 2.08 2.04 2.17 2.50 2.84 3.40 3.56 max poucr bmep s highest Problems he relative density of...
A single-cylinder four-stroke-cycle spark-ignition engine has a BSFC of 0.4 kg/kW-hr and a volumetric efficiency of...
A single-cylinder four-stroke-cycle spark-ignition engine has a BSFC of 0.4 kg/kW-hr and a volumetric efficiency of 78% at a speed of 45 rps. The bore is 6 cm and the stroke is 8.5 cm. What is the fuel flow rate, fuel-air ratio, and brake torque if the brake power output is 6 kW with ambient conditions of 100 kPa and 22 C?
You are tasked with designing a new 4-stroke engine for an autonomous vehicle platform. The desir...
You are tasked with designing a new 4-stroke engine for an autonomous vehicle platform. The desired specifications are shown in the table below. The engine power and torque requirements will be significantly lower than a conventional engine since the vehicle does not have to be fun to drive". Each cylinder will have a displacement of 0.5 L, and a compression raso of 12 to 1 5 KWT 5000rpm onjue BMEP @ Peak T Vapsr sylind 12 bar a) Given the...
Problem 4: A 12-cylinder, two-stroke CI diesel engine produces 2440 kW of brake power at 550...
Problem 4: A 12-cylinder, two-stroke CI diesel engine produces 2440 kW of brake power at 550 rpm using equivalence ratio o=1. The engine has a bore of 24 cm, stroke of 32 cm, volumetric efficiency of 100%. Calculate the mass flow rate of fuel into engine and brake specific fuel consumption.
Please answer all PROBLEM 1 A three-litre four-stroke diesel engine develops 12 kW per m3 of...
Please answer all PROBLEM 1 A three-litre four-stroke diesel engine develops 12 kW per m3 of free air inducted per minute. The volumetric efficiency is 82 % at 3600 rpm referred to atmospheric condition of 1 bar and 27 oC. A rotary compressor which is mechanically coupled to the engine is used to supercharge the engine. The pressure ratio and the isentropic efficiency of the compressor are 1.6 and 75 % respectively. Calculate the percentage increase in brake power due...
A diesel engine with a compression ratio of 14.5 starts the compression stroke with air at...
A diesel engine with a compression ratio of 14.5 starts the compression stroke with air at 101 kPa and 42ºC. Fuel with a heating value of 43,260 kJ/kg is used with a fuel/air ratio of 0.03 kg fuel/kg air. At full throttle the airflow to engine is measured to be 0.1 m3/s and 5% of the fuel does not burn due to poor fuel-air mixing. Model the engine as airstandard with variable specific heats, draw the cycle on a P-V...
4. Air enters the intake manifold at 25°C and 100 kPa on an SI engine utilizing...
4. Air enters the intake manifold at 25°C and 100 kPa on an SI engine utilizing throttle body injection. Liquid methanol, CH40, is injected into the intake manifold at an equivalence ratio of 1.1. Assume all the fuel evaporates in the manifold before entering the cylinder. The temperature of the mixture at the entrance to the cylinder is 5°C. a) Calculate how much heat transfer, per kg of air (i.e. kJ/kg air) must be entering the intake manifold. In your...
3. A six cylinder, four-stroke cycle SI engine with multipoint fuel injection has a displacement of 2.4 liters (0.0024 m). The engine operates on a hydrocarbon fuel with H/C = 1.9 and MW =105 kg/kmol, at an equivalence ratio of 1.05. Each cylinder has one fuel injector fired once per cycle. The flow rate for the injector when continuously open is 0.003 kg/s. Consider the wide-open throttle, peak power operating point where the design volumetric efficiency is 90% and the...
2. A 4.8 L, SI, four-stroke, V-8 stationary engine operates at 2000 RPM using gasoline with air/fuel ratio of 14.7. The engine has a volumetric efficiency of 90%, with a bore (B) and stroke (S) related as B:S=1.1:1. You can assume the density of fresh air is 1.16 kg/mº. Please calculate: (30 Points) a) Displacement of each cylinder, and length of stroke; b) Average velocity of piston; (This is a very simple question. You need find the distance piston moved...
Assume combustion equivalence ratio is 1, engine speed 5000 rpm.
calculate
a. volume at TDC;
b. Volume at BDC;
c. Compression Ratio;
d. Half stroke to rod ratio ( a/I )2. write the combustion
equations for the stoichiometric reaction
number of cylinders bore, b, 6 88.74mmm iston drop from short block @TDC. у0 TDC 0.29mm iston drop from short block @BDC. у0 BDC thickness of head gasket, y HG volume of clay in head, VO volume of clay in short...
Looking for an answer to 13.9. Which uses information from
13.8
(23%) A four-cylinder petrol engine with a bore of 63 mm and a stroke of 76 mm was tested at full throttle at 3000 rev/min over a range of mixture strengths. The following readings were taken during the test: 13.8 4 162 165.5 169 170 169 162 159 Brake load/(N) Fuel consumption/(ml/s) 2.08 2.04 2.17 2.50 2.84 3.40 3.56 max poucr bmep s highest Problems he relative density of...
A single-cylinder four-stroke-cycle spark-ignition engine has a BSFC of 0.4 kg/kW-hr and a volumetric efficiency of 78% at a speed of 45 rps. The bore is 6 cm and the stroke is 8.5 cm. What is the fuel flow rate, fuel-air ratio, and brake torque if the brake power output is 6 kW with ambient conditions of 100 kPa and 22 C?
You are tasked with designing a new 4-stroke engine for an autonomous vehicle platform. The desired specifications are shown in the table below. The engine power and torque requirements will be significantly lower than a conventional engine since the vehicle does not have to be fun to drive". Each cylinder will have a displacement of 0.5 L, and a compression raso of 12 to 1 5 KWT 5000rpm onjue BMEP @ Peak T Vapsr sylind 12 bar a) Given the...
Problem 4: A 12-cylinder, two-stroke CI diesel engine produces 2440 kW of brake power at 550 rpm using equivalence ratio o=1. The engine has a bore of 24 cm, stroke of 32 cm, volumetric efficiency of 100%. Calculate the mass flow rate of fuel into engine and brake specific fuel consumption.
4. Air enters the intake manifold at 25°C and 100 kPa on an SI engine utilizing throttle body injection. Liquid methanol, CH40, is injected into the intake manifold at an equivalence ratio of 1.1. Assume all the fuel evaporates in the manifold before entering the cylinder. The temperature of the mixture at the entrance to the cylinder is 5°C. a) Calculate how much heat transfer, per kg of air (i.e. kJ/kg air) must be entering the intake manifold. In your...
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