In a four-stroke engine, the intake valve opens in the intake stroke, allowing air-fuel mixture to enter, while the exhaust valve remains closed. During the compression stroke, both valves stay closed to build pressure. In the power stroke, the fuel ignites, pushing the piston down, with both valves still closed to retain pressure. Finally, in the exhaust stroke, the exhaust valve opens, allowing gases to escape, while the intake valve stays shut. This cycle repeats continuously, ensuring efficient engine operation.
Two. Intake, and exhaust.
A "Turbocharger" is driven by exhaust gas. A "Supercharger" is driven mechanically by the engine.
A mechanical cam in an engine converts rotational motion into linear motion to control the opening and closing of engine valves. As the cam rotates, its specially shaped profile pushes against a follower, which moves vertically to open the valve at precise timing during the engine's cycle. This ensures that the intake and exhaust valves operate efficiently, allowing for optimal airflow and combustion. The design of the cam determines the timing, duration, and lift of the valve movement, critical for engine performance.
it is an exhaust system installed in trucks to make you have better gas mileage. it increases your mpgs at least 5 mpg. it usually is not used in cars because there aren't many places under the hood that it can be stored. In trucks, it is installed above the engine, but you can also store it inside of other gaps throughout the engine. Cars dont have large gaps in their engine, so it cant be installed in there. Other than increasing your gas mileage, it also makes it run quieter.In regards to the above answer.........that is not really accurate.Actually, A free flow exhaust is a type of system installed in vehicles for increased power and a sporty look.They are designed to remove engine emissions more efficiently than standard exhaust systems.Free flow exhaust systems are designed for looks and increased efficiency and power in vehicles.They are typically made of 100 percent stainless steel, which offers a nice sporty look.They weigh less than standard exhaust systems, which helps account for increased fuel economy and improvement in acceleration.Exhaust systems are used for removing spent gas from a vehicle's engine; therefore exhaust systems play a role in engine tuning and performance.A free flow system allows the spent gas to exit the vehicle more efficiently by changing the pipes used in the system and installing an inter-cooler between the engine and the exhaust.With a free flow exhaust system, a smoother removal of spent gas is offered. Because of this, vehicle owners notice an improvement in the overall way their vehicle runs.These systems promote better gas mileage and increased acceleration as well.
A diesel engine turbocharger is capable of achieving its highest rotational speeds during high engine load and full throttle conditions. This occurs when the engine is producing maximum power, leading to increased exhaust gas flow, which drives the turbocharger more effectively. Additionally, optimal boost pressure and efficiency are achieved at these points, allowing the turbocharger to reach its peak performance. However, it's crucial to manage these speeds to prevent mechanical failure and ensure longevity.
Closed
Closed
They are closed during the power stage.
Closed
Both the intake and the exhaust valve are closed.
-intake: exhaust closed, intake open -compression: exhaust closed, intake closed -combustion: exhaust closed, intake closed -exhaust: exhaust open, intake closed
Closed
The strokes of a four stroke engine are intake, compression, power, and exhaust. The engine takes in the fuel, compresses it, uses it for power, and then the excess fuel comes out the exhaust.
The engine may backfire excessively. You may also smell a strong exhaust odor in the riding position. In worst cases, it can cause the engine to run lean.
Possible exhaust leak
During the power or combustion stage of a piston cycle, both valves are necessarily closed, because the expansion of gases is driving the piston down.
inboard gas engine exhaust