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 calorific value of fuel used in 10000 kcal kg, calculate the brake specific fuel consumption

Expert Solution

samet mamat answered 2 years ago

A 4 cylinder 4 stroke 2.3 L diesel engine with bore = 12.4 cm and stroke...

A 4 cylinder 4 stroke 2.3 L diesel engine with bore = 12.4 cm and stroke =11 cm. the crank radius is 6.2 cm and with a connecting rod length 15 cm. the compression ratio of the engine is 20 and the combustion efficiency is 97.3 %. If the average speed of the car over the running life of the engine is 56 km/h and the total traveled distance of the engine is 250000 km. note: use the engine speed...

A test was conducted on a 4-stroke four cylinder engine having 6.9 cm diameter and 8.9...

A test was conducted on a 4-stroke four cylinder engine having 6.9 cm diameter and 8.9 cm stroke. The fuel supply to the engine is 0.065 kg/min. The B.P measurements are given below with constant engine speed of 300 rpm: With all cylinder firing = 16.9 kW Cut off at 1st cylinder = 8.46 kW Cut off at 2nd cylinder = 8.56 kW Cut off at 3rd cylinder = 8.6 kW Cut off at 1st cylinder = 8.46 kW If...

1. One hydraulic press has a 2.0 cm diameter piston and another piston has a 8.0...

1. One hydraulic press has a 2.0 cm diameter piston and another piston has a 8.0 cm diameter. What force must be applied to the smallest piston to balance a force of 1600 N to the largest piston? a. 6.25 N b. 23 N c. 400N d. none of the above 2. A barrel contains an oil layer of 0.120 m over 0.250 m of water. The oil density is 600 kg / m³. The gauge pressure at the oil-water...

A two-cylinder, four-stroke gas engine has a bore of 380 mm and a stroke of 585...

A two-cylinder, four-stroke gas engine has a bore of 380 mm and a stroke of 585 mm. At 240 rev/min the torque developed is 11.86 kNm. If the engine 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.

For a marine diesel engine application, a fluid-film journal bearing has a shaft diameter of 32...

For a marine diesel engine application, a fluid-film journal bearing has a shaft diameter of 32 mm and the length of the bearing is 24 mm. The bearing uses SAE grade 20 oil as lubricant and operates under a radial load. The inlet and outlet temperatures of oil are 50oC and 110oC respectively. It is assumed that because of the shearing action there is a uniformly distributed energy release in the lubricant that heats the lubricant film. During run-in operation,...

A manufacturer produces piston rings for an automobile engine. It is known that the ring diameter...

A manufacturer produces piston rings for an automobile engine. It is known that the ring diameter is normally distributed with σ = 0.001 millimeters. When a random sample of 16 rings is collected, the sample mean of the rings’ diameters is of x- = 74.036 millimeters. a.) In order to find a confidence interval for the true mean piston ring diameter, which distribution table would you use? b.) Find the lower bound of a 95% confidence interval for the mean...

A manufacturer produces piston rings for an automobile engine. It is known that ring diameter is...

A manufacturer produces piston rings for an automobile engine. It is known that ring diameter is Normally Distributed with ? = 0.001 ??. A random sample of 9 rings has a mean diameter of ? = 74.036 ?? a. What is a 95% ?????????? ???????? for the true mean diameter of the piston rings. Use the given ? = 0.001 ??. b. Interpret the ?????????? ???????? constructed in part (a) c. For mathematical purposes, assume for a moment that 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...

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...

The inside diameter of a piston ring is normally distributed with a mean of 10 cm...

The inside diameter of a piston ring is normally distributed with a mean of 10 cm and a standard deviation of 0.04 cm. What is the probability that a piston ring will have an inside diameter less than 10.075 cm? What is the probability that a piston ring will have an inside diameter between 9.94 and 10.045 cm? What proportion of rings will have inside diameters exceeding 10.066 cm? Suppose that five piston rings are randomly selected. What is the...

Question