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Does a valve overlap of at least 45 degrees required for peak efficiency ina four stroke engine?
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What is purpose of valve overlap?
It improves the efficiency of the engine by allowing better exhaust out flow and intake in flow.
What does a overlap valve do?
send a small amount of raw fuel/air to the catalytic convertor,which increases the efficiency of the operating engine.
Why boost pressure required?
boost pressr is required to increase the power or efficiency of engine. because due to boost pressr we get better fuel combustion.
What is valve overlap?
Valve overlap occurs in a four-stroke engine at the end of the Exhaust stroke and at the beginning of the Induction stroke; and is when both the exhaust and inlet valves are open at the same time. At the end of the Exhaust stroke, the Exhaust valve is closing and the Inlet valve is starting to open in preparation for the induction of fuel and air into the cylinder. It is common knowledge that in vehicles that cannot alter the valve timing, the Inlet valve opens approx 6 degrees before top-dead-centre and the Exhaust valve closes at 9 degrees after top-dead-centre
If an engine must do 500 joules of work to pull a 10 kg load up4 meters what is the engine's efficiency?
energy required to lift up 10kg=10x9.81x4=392.4 joule. enegy produced by the engine=500 joule efficiency=392.4/500=78.48%
What is the efficiency of a gasoline engine?
Gasoline engines have a 30% efficiency, as compared to a Diesel engine having 40% efficiency. COOL HUH
What is thermal efficiency of petrol engine?
The maximum Thermal Efficiency of Petrol Engine or Gasoline Engine or Otto Cycle Engine is about 25-30%.
What is efficiency of an engine that gives off 70 percent thermal energy?
It is not a good efficiency engine.
What is check engine code 72 on a 1996 Plymouth Breeze?
Code 7 2 is catalytic converter efficiency below required level
What is the efficiency of an engine that gives off 70 percent thermal energy?
It is not a good efficiency engine.
Why don't modern fossil fuel power plants operate at or near 100 percent efficiency?
That's because they convert the energy to heat first. Do some reading about the Carnot cycle, or the theoretical Carnot engine; briefly, if (for example) the environmental temperature is 300K (27 degrees Celsius), and the heat engine operates at 900K (627 degrees Celsius), then the maximum theoretical efficiency is (900 - 300) / 900, or about 67%. The efficiency achieved in real machines, of course, will be less than that.
Is it true that thermal efficiency of a diesel engine equals indicated thermal efficiency - brake thermal efficiency?
no
