Explain Pulse converter system of turbocharging?

[mohit]

Explain Pulse converter system of turbochargin?

[deepak]

In pulse charging system, due to long interval of the air inlet and partial loss of air inlet (multi-inlet turbine) which lead a low efficiency of the turbine. To improve the performance of the engine, pulse converting charging system is introduced.

Pulse converting system tries to keep the advantage of pulse system which is its high available energy, and the unsteady flow at exhaust, meanwhile steady and efficient flow condition can be obtained for the turbine.

A real simple pulse converting system used for four-cylinder engine is shown in the figure below

It uses conventional pulse manifold, using a carefully designed connecting piece to connect a manifold which has two branches to a single turbine.

Through four cylinders connecting to an inlet of the turbine, it entirely avoids the interval of air inlet among exhaust pipes.

Comparing to constant pressure system though the inlet of a turbine is different it avoids the situation of pulse system operating in low efficiency.

The design of connecting piece makes the least transmission of pressure pulse from one pipe of the exhaust pipe to another, so it avoids that a cylinder's exhaust pipe breaks another cylinder scavenging process.

This type of pulse converter is mostly used on medium speed engine especially 4 cylinders, 8 cylinders and 16 cylinders. If the engine has a cylinder, we should use two pulse converter, each pulse converter converting an inlet of the turbine.

• It uses conventional pulse manifold, using a carefully designed connecting piece to connect a manifold which has two branches to a single turbine.
• Through four cylinders connecting to an inlet of turbine, it totally avoids the interval of air inlet among exhaust pipes.
• Comparing to constant pressure system though inlet of turbine are different it avoids the situation of pulse system operating in low efficiency.
• The design of connecting piece makes the least transmission of pressure pulse from one pipe of the exhaust pipe to another, so it avoids that a cylinder's exhaust pipe breaks another cylinder scavenging process.
• This type of pulse converter are mostly used on medium speed engine especially 4 cylinder, 8 cylinder and 16 cylinder. If engine has cylinder we should use two pulse converter, each pulse converter converting an inlet of turbine.