Answer / arul azhagan

four stroke is more
efficiency then two
stroke. In
four stroke engine if
nozzel spray more fuel, the
extra fuel(unburned fuel)
is save in the fib pumb but
in two stroke the extra
fuel is mixed with burned
air and exhaust in the port

Answer / ~dan dan

Two stroke engine gives always lesser efficiency than four stroke engine sir due to incomplete combustion and poor scavenging.

Answer / kameshver prasad

A four stroke engine is more efficient than 2-stroke due the
following reasons:-

1.)For the same size of cylinder, Some of the power and
compression stroke get wasted due to the presence of ports.
Improper combustion due to the mixing of burnt gases with
fuel.

2.)The fuel consumption is four stroke is less and the
combustion power in four stokr engine is greater there by
reducing the emmission of smellier gases.


3.)prescence of valves which precisely control the flow of
charge into the chamber and exit the exhaust gases with
proper timing which is hard to achieve by ports in a 2
stroke engine.

Answer / vinodh kumar j

To tell in simple 4 stroke engine is more advantageous in
terms of efficiency but considering power 2 stroke is more
efficient.

Answer / raja irfan

the efficiency of engine is calculated by revolution of crankshaft or flywheel. In 4 stroke engine crankshaft revolves twice(720 degree)in 1 complete cycle and in 2 stroke crankshaft revolves once (360 degree)in 1 complete cycle. thus a 4 stroke engine is more efficient than 2 stroke engine.

Answer / suryamack

For the same size of cylinder, Some of the power and
compression stroke get wasted due to the presence of ports.
Improper combustion due to the mixing of burnt gases with
fuel.

Answer / raja

four stroke engines having more thermal efficiancy than two
stroke engines that gives good fuel economy .

Answer / stush

A four stroke is more efficent. There are two revolutions
of the crankshaft for every complete cycle, whereas the two
stroke rotates the engine only once.

Answer / sriram

4s engine is more efficient than 2s as comapred with the
following:
load: 4s more load carrying capacity
2s less load carrying capacity
efficiency: 4s more efficient
2s less effficient
power :4s more
2s less

the reasons being ,the presence of valves in 4s helps it to
take in fresh charge and drive out the exhausts more
effectively then in 2s

Answer / sudha

Four stroke engine is more efficient than two stokr engine
as the fuel consumption is four stroke is less and the
combustion power in four stokr engine is greater there by
reducing the emmission of smellier gases

What is turbocharger and his rpm

0 Answers   JMD,

What is enthalpy?

5 Answers  

how to caluculate APFC panel rating, my running Load is 1320KW, Present P.F 0.76 to 0.8 we need 0.98 p.f

17 Answers   Accor, AEPL, Alfa Automation, Jet Airways, Kingfisher, Servo, Spice Telecom, Usha,

Why do you desire a change form your present position?

1 Answers  

what is the advantages and dis advantages of critical speed of turbine

4 Answers   Bhel, NTPC,

2. Dry saturated steam at 3.5 bar is expanded through a convergent nozzle to 2.2 bar. The exit area is 5 sq. cm. Calculate the exit velocity and mass flow rate, assuming isentropic expansion and super saturated flow. b) A cast iron cylinder head is fastened to a cylinder of 750mm bore with 12 stud bolts. The maximum pressure inside the cylinder is 3 Mpa. The stiffness of part is thrice the stiffness of the bolt. What should be the initial tightening load so that the point is leak proof at maximum pressure? Also choose a suitable bolt for the above application 2 The propeller shaft of a marine engine is to transmit 600 kW at 1200 rpm, without a significant bending. The efficiency of the propeller is 88% at 32 knots ( 1 knot = 1085 km/hr). If the slenderness ratio is less than 50 and the permissible shear stress should not exceed 65 Mpa. Determine the diameter of shaft. 3 A semi-elliptic leaf spring consists of two extra full-length leaves and six graduated length leaves, including the master leaf. Each leaf is 7.2 mm thick and 65 mm wide. The centre-to-centre distance between the two eyes is 1.3m. The leaves are pre-stressed in such a way that when the load is maximum, stress induced in all leaves are equal to 380 N/mm sq. Determine the maximum force that the spring can withstand

0 Answers  

What is FEED?

8 Answers  

DEAR Friends, If you any of them have previous placement papers or interview papers...plzz forward it to my mail id. "rajeevasv@gmail.com"........... Tank you

0 Answers  

why do we appoint u if we have software for same work?

3 Answers  

difference between microcontroller and microprocessor

0 Answers  

How to design spiral bevel gear.

7 Answers   Premium Transmission,

IF RPM OF PTO OF TRACTOR IS 540,torque at pto is 21kg/cm sq.& WE NEED IT TO 1800 RPM ,THROUGH GEAR ONLY FOR THAT WHAT WOULD BE ETHE GEAR STRUCTURE( I.E.NO TEETH OF BOTH GEAR ) IN ORDER TO GET 1800 RPM OUTPUT.

0 Answers   Eicher,