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What is the difference between a SI engine and a CI engine?
An SI engine ignites the fuel with a spark (SI = Spark Ignition) whereas the CI engine ignites the fuel with heat generated from compression (CI = compression ignition)
How do you reduce the knocking in SI engine and CI engine?
Adjust timing and/or quality of fuel
What are the supercharging limits for si engine and ci engine?
Limit of supercharging in si engine (1) knocking tendency in si engine increases with increase with temp pressure density of charge , mixture strength (2) compression ratio of engine needs reduced with supercharged engine but the reduced compression ratio reduce the power output output & thermal efficiency of engine with increase in s.f.c WHEREAS Limit of supercharging in CI Engines are mainly due to the thermal stresses and increased gas loading. Due to this, the heat generation and heat transfer increases and there is a greater tendency to bum the piston crown and the seat and the edges of exhaust valve. Increasing the valve overlap in supercharged engines solved this problem.
What energy does the steam engine use?
steam engine uses thermal energy to convert water into steam and then uses pressure of steam to move the engine .thus thermal energy into pressure and further pressure into mechanical energy.
What is engine back pressure?
Engine back pressure is a common ailment in faulty engines. It is when the exhaust sends the power to the very back of the vehicle, instead of through its engine.
How the knocking differs of SI engine with CI engine?
In SI engine knock occur due to spontaneous ignition of end gases , as propagating flame compresses the mixture causes high temp & pressure reaction take place in end gases that burns rapidly with high pressure peak called knock. Where as in CI engine knocking or detonation occur due autoignition fuel & air not mixed homogeneous prior to combustion.pressure peaks of knock come before Top Dead Center(TDC) in CI engine where as in SI engine it comes after the TDC.
What is the pressure inside a diesel engine cylinder?
Hi, I've just taken peak pressures on a 16 cylinder 10000 hp diesel engine used to provide electrcal power for a drilling ship. The average peak pressure in each cylinder was 177 bar.
SI unit for pressure?
The SI unit for pressure is the pascal, which is equivalent to newton per square meter.
Full form of SI engine?
SI stands for Spark Ignition. eg. Petrol Engine.
Why is the compression ratio of an SI engne often reduced when the engine is redesigned to be used with a turbocharger?
SI engines have high compression rates because it's a Non-Aspirated engine (NA) meaning it's all motor and no turbos. As an NA engine, it doesn't get additional power from anything but from the engine alone, so it requires high compression rates to maximize its torque and horsepower. On the other hand, SI engines should be tuned to lower compression rates before installing turbo chargers because Turbo chargers, when installed, significantly increases engine pressure to provide the needed power to force compressed cold air into the engine. Since an SI engine has a high compression rate, any significant increase on its compression after installing turbos may cause the engine to malfunction or worse, breakdown as the SI engine can only hold as much pressure at every given revolution rate (rpm) while running.
What is the difference between peak inspiratory pressure and plateau pressure?
Peak inspiratory pressure refers to the maximum pressure reached during inspiration, while plateau pressure refers to the pressure measured when there is no airflow in the lungs at the end of an inspiratory pause. Plateau pressure is a better indicator of lung distensibility and risk of overinflation compared to peak inspiratory pressure.
Is a newton SI unit of pressure?
No. A Newton is a unit of force, while pressure is force per unit area. The standard unit of pressure is a Pascal, which is also a derived SI unit.
What is the difference between a SI engine and a CI engine?
An SI engine ignites the fuel with a spark (SI = Spark Ignition) whereas the CI engine ignites the fuel with heat generated from compression (CI = compression ignition)
What pressure is in a petrol engine cylinder?
The pressure in a petrol engine cylinder can vary depending on the engine design, operating conditions, and performance parameters. Generally, during the compression stroke, the pressure can reach around 150-200 psi (pounds per square inch) before ignition, and peak pressures of 600-900 psi can be achieved during combustion.
What is SI engine and CI engine?
An SI engine is a spark ignition engine. A CI engine is a compression ignition engine. SI engines use spark plugs to ignite fuel in the combustion chamber. CI engines use compression in the combustion chamber to ignite the fuel.
The SI unit of pressure is?
Pascal...
What is the SI derived unit for pressure?
The SI derived unit for pressure is the pascal (Pa), which is defined as one newton per square meter.
