Q.3 Refer to the valve timing diagram. Calculate the total duration of inlet and exhaust valve openings. Inlet Exhaust Q.4 With reference to the valve timing diagram, suggest how to improve volumetric efficiency of the combustion process (e.g. for competition use). Q.5 An internal combustion engine produces torque and power. State definition of both terms and show equations used for mathematical calculations.

Q.3 Refer to the valve timing diagram. Calculate the total duration of inlet and exhaust valve openings. Inlet Exhaust Q.4 With reference to the valve timing diagram, suggest how to improve volumetric efficiency of the combustion process (e.g. for competition use). Q.5 An internal combustion engine produces torque and power. State definition of both terms and show equations used for mathematical calculations.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A certain engine has the following specifications for valve events: IVO at 12° before HDC, IVC at 40° after CDC;, EVO at 45° before CDC, EVC at 10° after HDCCalculate the number of crankshaft degrees during which (a.) each intake valve and (b.) each exhaust valve is open in a cycle.
In a 4-stroke engine, the intake valve opens 10º before the TDC and 40º after the TDC.is closing. Exhaust valve opens 45º before TDC and closes 10º after TDC.Since the ignition advance is 8º at 3000 rpm;a) Intake, compression, work and exhaust times on the valve time diagram.Calculate the angles of incidence.b) Calculate the valve overlap angle.1. In a 4-stroke engine, the intake valve opens 10º before the TDC and 40º after the TDC.is closing. Exhaust valve opens 45º before TDC and closes 10º after TDC.Since the ignition advance is 8º at 3000 rpm;a) Intake, compression, work and exhaust times on the valve time diagram.Calculate the angles of incidence.b) Calculate the valve thrust angle.
7. How do you designate the size of an engine? 8. What will be the total piston displacement in a two-cylinder 100 mm x 130 mm engine? 9. If each cylinder of the above engine has a clearance volume equal to one fifth of the total cylinder volume, then compute: a) the clearance volume; b) the compression ratio. 10. Sketch the operation of a four-stroke petrol engine, explaining the events at each stage. How will the events differ from those of a diesel engine? 11. Why is there a power stroke for every down stroke of piston travel in a two-stroke engine? At what interval does the power stroke occur in a four-stroke engine? 12. Assuming a firing order of I four-cylinder engine, complete the events in the other cylinders if the events for cylinder l'are as shown in Table 2.3. 3 2 for a
For a 4-stroke, SI engine with the following parameters: crank angle degree (CAdeg ATDC), 20 start of combustion (soc) crank angle degree: -10 CAdeg ATDC burn duration: 40 CAdeg Calculate the mass fraction burned (between 0 to 1) based on the Wiebe function. (assume a=5 and m=2) Give your answer to 2 decimal places.
1. Pressure gauge the hydraulic cycle in figure -consist of:7 5 6 X LB ww M 3 Feed direction & tank O accumalator O intensifier O 3 way 2 position control valve O
5. How many times the intake valve opens in a 4-stroke-cycle engine running at 2000 rpm. 6. If the compression ratio is 1:17, the clearance volume for 100 cm3 piston displacement volume is ___. 7. If a 4-cylinder, 2-stroke-cycle internal combustion engine has 600 explosion per minute, what is the engine rpm?
bore and stroke of the fuel pump. 2. A 4-cylinder, 4-stroke, diesel engine, has the following parameters: brake power 100 hp, engine speed = 25 r.p.s, b.s.f.c. = 213 g/kW.hr, fuel density = 0.85 g/cm³, a = 1.2, and z = 1.25. Calculate: (i) Volume of fuel injected for one cylinder. (ii) Bore and stroke of the fuel pump. 3. A 4-stroko
c) A three stage, single acting, reciprocating air compressor has similar operating parameters to that in part a). The low pressure cylinder has a 450mm bore and 300mm stroke. The clearance volume of the low pressure cylinder is 5% of the swept volume. Intake pressure and temperature are 1 bar and 18°C, respectively. The final delivery pressure is 15bar. Intermediate pressures are ideal and inter-cooling is perfect. The compression and expansion index can be taken as 1.3 throughout. Determine, i) The intermediate pressures; ii) The effective swept volume of the low pressure cylinder; The temperature and volume of air delivered at 15bar; The work done/kg of air iv) [R=0.29 kJ/kg] d) What improvements are observed from the use of the 3-stage compressor in part c) compared to the single stage compressor in part a). Are there any drawbacks to using the 3-stage compressor. part A) A single stage, single acting, reciprocating air compressor has a cylinder of 450mm bore and 300mm stroke. The…
8. Draw the graphic symbol for a two-position spring centered valve, a spring offset valve, an energize-to-center valve.
Engine Type: Single cylinder Four stroke Diesel engine, Bore: 0.0875m, Stroke: 0.11m Capacity: 661.5 cc, Power: 6 H.P. at 1500 rpm, Torque: 2.96 kg.m at 1500 rpm and Compression Ratio :17.5:1 Explain how to measure the :- Fuel consumption. Inclined manometer readings for air flow. RPM, power output etc. (iv) Study of various components of diesel engine. (ii)
(e) Calculate the angular velocity of the gas mixture sing paddle wheel model of two- cylinder engine by assuming swirl ratio is 11. Use the following data: i. air to fuel ratio 8.8 ii. compressiom ratio-7.2 ii, volunetric efficiency77 iv. indicated thermal efficiency 33 v. mechanical efficiency55 vi. brake power 62000 j/sec vii. engine volmne 1000 cm3 vi. calorific value 45000 kj/m
2 - A 6 cylinder petrol engine operates on the 4-stroke cycle (Otto cycle), cylinder bore (70 mm), and piston stroke (100 mm). The clearance volume per cylinder is (67 cm³). At a speed of (3960 rpm) the fuel consumption is (19.5 kg/hr) and the torque developed is ((140 Nm). The calorific value of fuel is 43884kj/kg Calculate: i- brake power ii – bmep iii – brake thermal eff. iv – relative eff. On brake power basis [answer: 58 kW , 7.61x105, 24.4%, 45.7%]