Question: A 3-Litre, four-stroke cycle, CI engine operates at an engine speed of 4000 RPM. It has a brake specific fuel consumption of 250 g/kW.h.

A 3-Litre, four-stroke cycle, CI engine operates at an engine speed of 4000 RPM. It has a brake specific fuel

A 3-Litre, four-stroke cycle, CI engine operates at an engine speed of 4000 RPM. It has a brake specific fuel consumption of 250 g/kW.h. The volumetric efficiency is 90%. The mechanical efficiency is 88%. The light diesel has a heating value of 41,000 kJ/kg. The combustion efficiency is 98%, and the air- fuel ratio is 18. The bore and stroke are related as B=1.2S. The maximum average piston speed is 15 m/s according to the limitation of the new material used in this engine. Determine: (i) The minimum number of cylinders. (ii) Mass flow rate of exhaust flow of the engine. [kg/s] (iii) Indicated thermal efficiency. [%] The manufacturer plans to use this engine to power a pickup truck but finds its power output is insufficient. The design team plans to add a supercharger to the engine to add extra 50 kW brake power to the original engine so that they do not need to re-design the whole engine. The brake specific fuel consumption is now improved to 190 g/kWh, and the air-fuel ratio is increased to AF=19. Determine the volumetric efficiency of the modified engine [%].

Step by Step Solution

★★★★★

3.32 Rating (164 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

i To determine the minimum number of cylinders we need to calculate the displacement volume of the engine Displacement volume 3 L 1000 cm3L 3000 cm3 W... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mechanical Engineering Questions!

How the development of China and rise of BRICS may contribute to the new "world order"? What is the outlook for the US economy given the future presidential candidates and the current presidential...

Googles ease of use and superior search results have propelled the search engine to its num- ber one status, ousting the early dominance of competitors such as WebCrawler and Infos- eek. Even later...

Analyze a 2001 Chevrolet Duramax 6.6 L turbo diesel engine using the air-standard Diesel cycle that addresses the "real" effects of non-isentropic compression/expansion, air-fuel ratio, fuel heating...

On December 31, 2023, Reagan Incorporated signed a lease with Silver Leasing Company for some equipment having a seven-year useful life. The lease payments are made by Reagan annually, beginning at...

4 Logistics Managers need to be aware of the costs of shipping, and as such, they attempt to ensure that shipping is as efficient as it can be. With this in mind, let us see how we would make a...

A three cylinder, four stroke, SI engine has a bore of 9 0 mm and a stroke of 9 5 mm . The compression ratio is 9 : 1 . The engine runs at 5 0 0 0 rpm . The relative cycle efficiency based on the...

1 ) A four - stroke diesel engine on test gave the following results: Speed = 3 0 0 0 [ rev / min ] Torque = 1 1 6 . 5 [ Nm ] fuel flow = 1 7 5 [ ml / min ] Calculate the following engine parameters:...

A car has a five - litre CI V 8 engine that operates on a four - stroke cycle. The engine is connected to a dynamometer, giving a brake output torque reading of 2 5 0 N - m at 3 6 0 0 rpm . At this...

Zabdrung's car has a SI V 4 engine that operates on a four - stroke cycle. The engine is connected to a dynamometer which gives a brake output torque reading 1 8 0 Nm at 3 6 0 0 rpm . At this speed,...

In the biochemical process of glycolysis, living cells obtain energy (ATP) by breaking down sugar (glucose). Many intermediate reactions and compounds are involved. A model for the dynamics of two of...

What are some potential problems with using anonymous whistle-blowing systems?

Jerrife, mi rusunce prosucer, a collectring consumer profie vitonnation from a prospective annity clent, she has already collected the proseet's sge, amual income, financial stuation, and needs,...

A solution is made by mixing 150mL of 0.12 M HCN, 100 mL of 0.56 M NaOH and 75 mL of 0.78 M HCl. What is the pH of this solution? The Ka of HCN is 4.0 x 10-10.

1. Write the equation for the titration of Ca2 + with EDTA. 2. Write the equations for the endpoint color change of Eriochrome Black T (EBT) with Mg2 + . 3. Report the water hardness as ppm CaCO3 of...

Using the following system of ODES (first order ODE set). xi = x2 x2 = -2 cos(t) - 4 cos(2t) How do you identify the initial condition for each equation? How do you apply Euler's method with four...

Consider the following two projects: Cash flowsProject AProject BC0$ 140$ 140C15770C25770C35770C457 Required: a. If the opportunity cost of capital is 9%, which of these two projects would you accept...

A cylinder of volume 2 m3 contains 1 kg of hydrogen at 20oC. Determine the change in (a) Pressure (p). (b) Stored energy (E). (c) Entropy (S) of the gas as the chamber is heated to 200oC. Use the PG...

A 5 cm diameter piston-cylinder device contains 0.04 kg of an ideal gas at equilibrium at 100 kPa, 300 K occupying a volume of 0.5 m3. Determine (a) the gas density (), and (b) the specific volume...

A converging-diverging nozzle has an exit area to throat area ratio of 1.8. Air enters the nozzle with a total pressure of 1100 kPa and a total temperature of 400 K. The throat area is 5 cm2. If the...

=+20. In a study of factors that affect the ability of the laser in a DVD player to read the information on a DVD,

=+16. In stratified sampling, explain why the number of strata, k, should not exceed ny2, where n 5 n1 1 n2 1 n3 1 1 nk is the total sample size and ni denotes the number of sampled items selected...

=+a. In the case where all unit sampling costs are equal, show that the resulting weights give the formulas for n and ni specified by the Neyman allocation.