Question

In: Mechanical Engineering

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?

Solutions

Expert Solution


Related Solutions

A vehicle which is equipped with a 6 cylinder, 2000 cc spark ignition engine is cruising...
A vehicle which is equipped with a 6 cylinder, 2000 cc spark ignition engine is cruising at an average speed of 150 km/h from Ankara to Istanbul on the highway. The mass of the vehicle with single driver is 1200 kg and its projected frontal area is 3 m2. The coefficient of rolling resistance is 0.015 and the discharge coefficient is 0.3. The distance between Istanbul and Ankara is approximately 450 km. Assuming an average brake specific fuel consumption of...
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...
Calculate air to fuel ratio by mass, for a four-cylinder SI engine running on i) gasoline...
Calculate air to fuel ratio by mass, for a four-cylinder SI engine running on i) gasoline and ii) a mixture of 20% methanol and 80% gasoline both at stoichiometric conditions. Assume gasoline is represented with C8H18 . Calculate any loss of power when gasoline-methanol mixture is used and discuss your results.
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: Stroke length (m and cm) Average piston speed (m/sec) Mass flow rate of air into engine [kg/sec] Mass flow rate of fuel into engine [kg/sec]
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...
1. An aluminum air-cooled engine cylinder head for a single cylinder, 2-stroke engine is to be...
1. An aluminum air-cooled engine cylinder head for a single cylinder, 2-stroke engine is to be die-cast. The overall diameter of the cylinder head is 101.6 mm. If the projected plan area of the runners and gating system is 100 mm2 and the casting pressure is 10 MPa (1500 psi), what minimum locking force is required for the die-casting machine in kN.
The air mass flow rate of a jet engine is 10 kg/s. The stagnation enthalpy at...
The air mass flow rate of a jet engine is 10 kg/s. The stagnation enthalpy at the exit of the turbine is 918 kJ/kg and the excess air is 4.5. (a) What should be the mass flow rate of fuel injected in the afterburner, such that the stagnation enthalpy at the end of the afterburner is 1700 kJ/kg? (b) What is the excess air in the afterburner? (c) What is the maximum temperature in the afterburner?
6.5 An engine manufacturer has decided to change one of its engines from a spark ignition...
6.5 An engine manufacturer has decided to change one of its engines from a spark ignition type to a compression ignition type. If the swept volume is unchanged, what effect will the change have on: (i) maximum torque? (ii) maximum power? (iii) the speed at which maximum power occurs? (iv) economy of operation?
A reputable engine company has been making carbureted spark-ignition engines that operate with an equivalence ratio...
A reputable engine company has been making carbureted spark-ignition engines that operate with an equivalence ratio = 1.0 and a compression ratio of 9:1 for years. In order to control emissions, the engines operate with 20% exhaust gas recirculation (EGR) and a three-way catalytic converter. Since the company’s market share is steadily dropping, they consider hiring a MEC graduate to rescue them. The ambitious young engineer proposes a port fuel-injected (PFI) design, which operates lean at 0.7 with a high...
The engine of problem 10 is supplied with a mixture of gas and air in the...
The engine of problem 10 is supplied with a mixture of gas and air in the proportion of 1 to 7 by volume. The estimated volumetric efficiency is 85 % and the Qnet,p of the gas is 38.6 MJ/m3. Calculate the brake thermal efficiency of the engine. ANSWER (27.4 %)
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT