How does a diverter valve work turbo

Engineering Explained 6 years ago. Remind me later. Share Tweet Email Whatsapp. What is turbo flutter? What is a blowoff valve? How do anti-lag systems work? What Is A Wastegate? What Is Turbo Flutter? What Is A Blowoff Valve? Picking the best valve comes down to the how much boost you'll be running and the physical space available for installation. Not all turbocharged engines are made for blowoff valves. They might need a bypass aka diverter or recirculating valve instead.

They both accomplish the same task but there's a big difference in how they do it. The type of engine management your car runs will come into play when choosing a valve. If you have a MAF-type system, it meters the airflow after it enters the intake system. In this case, when a blow-off discharges to the atmosphere, the ECU isn't able to properly fuel the engine resulting in rich AFRs, hesitation, bad idle and even stalling.

In these systems the excess pressure must be plumbed back into the turbo system before the compressor inlet, which is what a bypass valve does. Remember, the key to picking a blowoff valve is to know your car and what kind of turbo plumbing it needs.

This chamber is sealed from the low pressure side by the orange diaphragm. This pressure that builds up inside the valve equalizes the forces on the valve and keeps it shut under boost.

Once you lift off the throttle, the solenoid pulls the valve open with a good amount of force and speed releasing pressure to the intake from both the charge piping as well as the internal valve chamber. The spring then returns the valve to the sealed position. One obvious failure mode is a tear in the orange diaphragm.

This valve does away with the diaphragm that is prone to failure. There is more to it than just this. That is when you are just building boost, or when you are quickly back on the throttle after a gear shift. During times like these one of two things can happen:. Actuator — It runs the disc a well as the assembly elements. It can be operated by motors, levers, manually, or pneumatically. Packing — This part protects your diverter valve from damage.

It houses the internal elements of the valve. Blow-off valves are made up of four parts: springs, a vacuum connection point, inlet port, and outlet port. These parts are made of high-quality aluminum material and come with elements like bolts, gaskets, and flanges. You can also choose whether you want a red, purple, or silver-colored valve. Also, note that new blow-off valves can come with less or additional parts, it will depend on the kind of valve you want. Furthermore, note that most of the parts found in the diverter valve will also be found in the blow-off valve.

However, the two valves differ in most parts and what they are meant to do, and how they are designed. The simplest way to solve the mystery of the diverter valve vs blow-off valve is to know their purposes. The blow-off valve has two main purposes: to prevent your car engine from wearing out fast and to prevent any compressed air surges.

It achieves these purposes by releasing the excess air into the atmosphere. The diverter valve takes the air and recycles it through the intake system.

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