What is the position of the exhaust valve during intake stroke?
Exhaust stroke. The piston is at bottom dead center and starts to come back up. The exhaust valve opens fully and starts to go closed. Before the piston reaches TDC, the intake valve starts to open and the exhaust valve is still partially open.
In which scavenging method the inlet and exhaust ports are placed at bottom and top ends of the combustion chamber respectively?
Uniflow scavenging is a design in which the fresh intake charge and exhaust gases flow in the same direction. This requires that the intake and exhaust ports be at opposite ends of the cylinder.
Is the opening or closing of a valve after either BDC or TDC?
Lead refers to a valve opening before either BDC or TDC, and lag to closing after BDC or TDC. Overlap is the condition where the inlet and exhaust valves are open at the same time. …
Where is the intake manifold on a V-8 engine?
The intake manifold has mounted a side of the cylinder block in L-head engines and on the side of the cylinder head in I-head engines. It is situated between the two cylinder banks on V-8 engines.
What does the intake and exhaust system do?
Intake and Exhaust System The intake and exhaust system deals with the inflow of fresh air and the outflow of used gases in the engine. AIR INTAKE SYSTEM This system allows fresh air to enter the engine.
When do exhaust gases pass around the intake manifold?
When the engine is cold, all the exhaust gases pass around the intake manifold. When the engine is warmed up, a part of the exhaust gases goes around it, and when the engine is fully warmed up none of the exhaust gases passes around the intake manifold, but goes directly to the exhaust pipe as shown fig. Read also:
How is the exhaust manifold connected to the muffler?
In some V-8 engines, each manifold is connected to a separate exhaust pipe, muffler and tailpipe. On others, they are connected by a crossover pipe and exhaust through a common muffler and tailpipe. Fig shows an exhaust manifold for eight-cylinder in line passenger car engine.
How is the exhaust manifold connected to the intake manifold?
The centre portion of the exhaust manifold is often connected to the intake manifold of an in-line engine through a heat trap and exhaust damper, except where the intake manifold is water heated. The damper is controlled thermostatically to deflect the exhaust gases around the intake manifold.
How does the damper work on the intake manifold?
The damper is controlled thermostatically to deflect the exhaust gases around the intake manifold. When the engine is cold, all the exhaust gases pass around the intake manifold.
Why do you need a locating pin on a two stroke engine?
You don’t want that ring end gap spinning and causing complete engine failure. In general, two-stroke engines run hot. Over time a piston can start to lose hardness due to heat, which is called annealing. As the material anneals, the strength of the material holding the locating pin becomes weaker.
Where are the locked phaser positions on a car?
The locked phaser positions on this engine are full retard on the intake and full advance on the exhaust. Because of the clockwise rotation when viewed from the front of the engine, the exhaust rotor requires additional assistance in reaching the full advance position. In the default position, there is no valve overlap.