Question

. A twin-cylinder 2-stroke engine has a swept volume of 150 cm3 . The maximum power output is 19 kW at 11,000 rpm. At this condition, the bsfc is .11kg/MJ and the gravimetric air/fuel ratio is 12:1. If ambient test conditions are 10 C, 1.03 bar and the fuel has a calorific value of 44 MJ/kg, calculate the bmep, the arbitrary overall efficiency and the volumetric efficiency.

Answer #1

a six-cylinder four stroke automobile engine is being designed
to produce 75 kW at 2000 rpm with a bsfc of 300 g/kWh and a bmep of
12 bar. the engine is to have equal bore and stroke, and fueled
with gasoline with a heat of combustion of 44510 kj/kg. (a) what
should be the deisng displacement volume and bore? (b) what is the
fuel consumption per cycle per cylinder? (c) what is the brake
thermal efficiency?

The mileage of a stationary twin cylinder petrol engine
generating output power at 03 a rate of 10kW per liter of stroke
volume is 0.257 kg/kWh. Determine the efficiency of conversion of
combustion heat energy into useful power inside the cylinder if the
volume of charge after compression is 0.2 liters in each cylinder.
The engine is operating with a compression ratio of 11:1 and the
fuel has a calorific value of 44MJ/kg. The crank case of the engine
is...

A high performance 4 stroke supercharged gasoline engine is
being designed. The target specifications are as follows:
IMEP: 31 bar at peak power
bsfc: 233 g/kWh
isfc: 205 g/kWh
Bore to stroke ratio: 1..04
Number of cylinders: 4
Maximum mean piston speed: 24 m/s
Compression ratio: 10:1
Simulation results indicate that the indicated work per
cylinder per cycle needs to be 1400 J/cyl/cyc.
Based on the provided information, finalize the engine design
for the following parameters:
Bore and stroke (mm)...

A naturally aspirated six cylinder, 6.128-L (374-in^3) diesel
engine consumes 21.9 kg/h (48 lb/h) of fuel and 440 kg/h (970 lb/h)
of air while running at 2400 r/min (rpm) and producing 93.8 kW (126
hp) of brake power. Assume the barometric pressure is 100 kPa (14.5
psi) and the ambient air temperature is 300 degrees K (540 degrees
R). A. Calculate the theoretical air consumption of the engine. B.
Calculate the volumetric efficiency. C. Calculate the air to fuel
ratio....

A naturally aspirated six cylinder, 6.128-L (374-in^3) diesel
engine consumes 21.9 kg/h (48 lb/h) of fuel and 440 kg/h (970 lb/h)
of air while running at 2400 r/min (rpm) and producing 93.8 kW (126
hp) of brake power. Assume the barometric pressure is 100 kPa (14.5
psi) and the ambient air temperature is 300 degrees K (540 degrees
R). A. Calculate the theoretical air consumption of the engine. B.
Calculate the volumetric efficiency. C. Calculate the air to fuel
ratio....

A 3.2 L, 5 cylinder, 4 stroke cycle diesel engine operates at
2,400 RPM. Fuel injection 20o bTDC
From 5o Up to aTDC. The engine's volumetric efficiency
is 0.95 and operates at a fuel equivalent ratio of 0.8. The fuel
used is diesel, and the theoretical air-fuel ratio of diesel is
14.5. Calculate the following.
(1) The fuel injection angle is 25o. Corresponding fuel injection
time
(2) Mass of air supplied to one cylinder for one cycle using
volumetric efficiency...

A V-8 four-stoke petrol engine is required to give 186.5 kW at
4400 rev/min. The brake thermal efficiency can be assumed to be 32%
at the compression ratio of 9/1. The air-fuel ratio is 12/1 and the
volumetric efficiency at this speed is 69%. If the stroke to bore
ratio is 0.8, determine the engine displacement required and the
dimensions of the bore and stroke. The Qnet,v of the fuel is 44 200
kJ/kg, and the free air conditions are...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 14 minutes ago

asked 30 minutes ago

asked 30 minutes ago

asked 31 minutes ago

asked 34 minutes ago

asked 34 minutes ago

asked 34 minutes ago

asked 37 minutes ago

asked 42 minutes ago

asked 52 minutes ago

asked 53 minutes ago