Question

In: Mechanical Engineering

Problem 1: A 5.2-liter, spark-ignition, four-stroke cycle, V6 automobile engine operates at 2400 RPM with ?...

Problem 1: A 5.2-liter, spark-ignition, four-stroke cycle, V6 automobile engine operates at 2400 RPM with ? = 1.5. The engine has a volumetric efficiency of 89%, with bore as B = 2.1 S. The density of air at room temperature is 1.18 kg/m3.

Lamda = 1.5

Calculate:

  1. Stroke length (m and cm)
  2. Average piston speed (m/sec)
  3. Mass flow rate of air into engine [kg/sec]
  4. Mass flow rate of fuel into engine [kg/sec]

Solutions

Expert Solution


Related Solutions

1- You need to analyze the operation and performance of a four-stroke, spark-ignition internal combustion engine...
1- You need to analyze the operation and performance of a four-stroke, spark-ignition internal combustion engine (automobile engine). a- Would you analyze the engine as an Open System or a Closed System? b- How many properties of the engine exhaust would you need to measure in order to determine the Thermodynamic State of the exhaust gas? c- Identify a set of properties of the exhaust gas that you might measure to establish its state. d- Are these properties Intensive or...
A single-cylinder, four stroke research engine operates on Otto cycle. The specification of the engine is...
A single-cylinder, four stroke research engine operates on Otto cycle. The specification of the engine is shown as below:- Displacement volume of the cylinder = 540 cm3 Clearance volume of the cylinder = 60 cm3 Minimum temperature = 200°C Minimum pressure = 200 kPa Net work output = 1000 kJ/kg Sketch the process on a P-V diagram and by using constant specific heat at room temperature, determine: i) the temperature and pressure at each process, ii) the thermal efficiency of...
A single-cylinder, four stroke research engine operates on Otto cycle. The specification of the engine is...
A single-cylinder, four stroke research engine operates on Otto cycle. The specification of the engine is shown as below:- Displacement volume of the cylinder = 560 cm3 Clearance volume of cylinder = 70 cm3 Minimum temperature = 200°C Minimum pressure = 200 kPa Net work output = 1000 kJ/kg Sketch the process on a P-V diagram and by using constant specific heat at room temperature, determine: 1) the temperature and pressure at each process, 2) the thermal efficiency of the...
The 12 cylinder 2 stroke cycle compression ignition engine of an oil tanker is operating at...
The 12 cylinder 2 stroke cycle compression ignition engine of an oil tanker is operating at 150 rpm The brake mean effective pressure of the engine is 400 kPa and the excess air coefficient is 2. The crankshaft of the engine is directly coupled to a propeller and a torque of 1500 kN-m is applied. The engine operates on light fuel oil which can be approximated as C12H26. If the brake specific fuel consumption is 200 g/hp-h what is the...
During the power stroke in a four-stroke automobile engine, the pis-ton is forced down as the...
During the power stroke in a four-stroke automobile engine, the pis-ton is forced down as the mixture of combustion products and air undergoes an adiabatic expansion. Assume (1) the engine is running at 2500 cycles/min; (2) the pressure immediately before the expansion is 20.0 atm; (3) the volumes of the mixture immediately before and after the expansion are 50.0 cm3and 400 cm3, respectively ; (4) the time interval for expansion is one-fourth that of the total cycle; and (5) the...
Consider an automobile engine which operates on the ideal Otto cycle. In this engine, air is...
Consider an automobile engine which operates on the ideal Otto cycle. In this engine, air is compressed with a compression ratio of 10. At the beginning of the compression process, air is at 105 kPa and 17oC, and in the combustion process 640 kJ/kg of heat is added to air. Taking into account the variation of specific heats with temperature, determine (a) the pressure and temperature at the end of the heat-addition (combustion) process, (b) the net work output, (c)...
Isooctane is supplied to a four-cylinder spark-ignition engine at 2 g/s. Calculate the air flow rate...
Isooctane is supplied to a four-cylinder spark-ignition engine at 2 g/s. Calculate the air flow rate for stoichiometric combustion. If the engine is operating at 1500 rev/min, estimate the mass of fuel and air entering each cylinder per cycle. The engine displaced volume is 2.4 liters. What is the volumetric efficiency?
Temperatures of gases inside the combustion chamber of a four‑stroke automobile engine can reach up to...
Temperatures of gases inside the combustion chamber of a four‑stroke automobile engine can reach up to 1000 ∘C.1000 ∘C. To remove this enormous amount of heat, the engine utilizes a closed liquid‑cooled system that relies on conduction to transfer heat from the engine block into the liquid and then into the atmosphere by flowing coolant around the outside surface of each cylinder. Suppose that, in a particular 55‑cylinder engine, each cylinder has a diameter of 8.50 cm,8.50 cm, a height...
1) A four-stroke diesel engine has a piston diameter of 16.5 cm and a stroke of...
1) A four-stroke diesel engine has a piston diameter of 16.5 cm and a stroke of 27 cm. The compression ratio is 14.3, the cut-off 4.23% of the stroke and the mean effective pressure 4.12 bar. The engine speed is 264 rev/min and the fuel consumption is 1.076 kg of oil per hour, having a calorific value of 39150 kJ/kg. Calculate the relative efficiency of the engine 2). A diesel engine has a brake thermal efficiency of 30%. If the...
Design a four stroke cycle for SI engine using crankcase compression. Draw schematics of the six...
Design a four stroke cycle for SI engine using crankcase compression. Draw schematics of the six basic process: intake, compression, combustion, expansion, blowdown and exhaust. Describe fully the intake of air, fuel and oil.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT