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Rhf55-Vf37 Compressor Wheel China Factory Supplier Thailand
Dec 06, 2017

Rhf55-Vf37 Compressor Wheel China Factory Supplier Thailand Basic Info

  • Model NO.: BOSJ-C

  • Body Material: Aluminium

  • Electric Turbocharger Type: Axialflow

  • ETS Type: Axialflow

  • Compressor Wheel Type: Compound Turbo System

  • Certification: ISO9001, CE, E-Mark, RoHS

  • ETS Component: Turbine

  • Compressor Wheel Application: WuLing

  • Making Machine: 5 Axis

  • Compressor Wheel Specification: BOSJ-T

Rhf55-Vf37 Compressor Wheel China Factory Supplier Thailand Product Description

  
Rhf55-Vf37 Compressor Wheel China Factory Supplier Thailand Compressor Wheel Parameter

ApplicationReplace wheel number: ???
Fit CHRA : 700177-0001
Fit Turbo # : 714569-0001, 714569-0002, 714569-0003
Product SituationBrand New
Maximum boost 5 bar / 70 Psi
BalanceBalanced By SCHENCK Germany
Ready to competition
Wheel SizeInducer Dia.: 54.97 / 76.13 mm (Trim 52)
Exducer Dia. : 76.13 mm
Extend Tapered Tip Exducer dia : 82.54 mm
Tip Height: 6.55 mm
Super Back Height: 2.36 mm
Bore: 5.99 mm
Blade : 6+6
MaterialForged Aluminum
 NoteWe can customize billet compressor wheel, Please contact us if you need it.
We can combine shipping for all items and will send invoice when we receive all of your order.


 
or variable-geometry turbochargers.


Two-stage variable twin-turbos employ a small turbocharger at low speeds and a large one at higher speeds. They are connected in a series so that boost pressure from one turbocharger is multiplied 
 
by another, hence the name "2-stage." The distribution of exhaust gas is continuously variable, so the transition from using the small turbocharger to the large one can be done incrementally. Twin 
 
turbochargers are primarily used in Diesel engines. For example, in Opel bi-turbo Diesel, only the smaller turbocharger works at low speed, providing high torque at 1,500-1,700 rpm. Both 
 
turbochargers operate together in mid range, with the larger one pre-compressing the air, which the smaller one further compresses. A bypass valve regulates the exhaust flow to each turbocharger. 
 


Rhf55-Vf37 Compressor Wheel China Factory Supplier Thailand Compressor Precision Machine

The compressor increases the mass of intake air entering the combustion chamber. The compressor is made up of an impeller, a diffuser and a volute housing.
Main article: Centrifugal compressor
The operating range of a compressor is described by the "compressor map".
 
Main article: Compressor map
  Additional technologies commonly used in turbocharger installations
Intercooling[edit]


Fuel-air mixture ratio
 
In addition to the use of intercoolers, it is common practice to add extra fuel to the intake air (known as "running an engine rich") for the sole purpose of cooling. The amount of extra fuel varies, but typically reduces the air-fuel ratio to between 11 and 13, instead of the stoichiometric 14.7 (in petrol engines). The extra fuel is not burned (as there is insufficient oxygen to complete the chemical reaction), instead it undergoes a phase change from atomized (liquid) to gas. This phase change absorbs heat, and the added mass of the extra fuel reduces the average thermal energy of the charge and exhaust gas. Even when a catalytic converter is used, the practice of running an engine rich increases exhaust emissions
 
Wastegate
Many turbochargers use a basic wastegate, which allows smaller turbochargers to reduce turbocharger lag. A wastegate regulates the exhaust gas flow that enters the exhaust-side driving turbine and therefore the air intake into the manifold and the degree of boosting. It can be controlled by a boost pressure assisted, generally vacuum hose attachment point diaphragm (for vacuum and positive pressure to return commonly oil contaminated waste to the emissions system) to force the spring loaded diaphragm to stay closed until the overboost point is sensed by the ecu or a solenoid operated by the engine's electronic control unit or a boost controller, but most production vehicles use a single vacuum hose attachment point spring loaded diaphragm that can alone be pushed open, thus limiting overboost ability due to exhaust gas pressure forcing open the wastegate.

Compress Wheel 


In this situation, the surge can raise the pressure of the air to a level that can cause damage. This is because if the pressure rises high enough, a compressor stall occurs-stored pressurized air decompresses backward across the impeller and out the inlet. The reverse flow back across the turbocharger makes the turbine shaft reduce in speed more quickly than it would naturally, possibly damaging the turbocharger.
 
To prevent this from happening, a valve is fitted between the turbocharger and inlet, which vents off the excess air pressure. These are known as an anti-surge, diverter, bypass, turbo-relief valve, blow-off valve (BOV), or dump valve. It is a pressure relief valve, and is normally operated by the vacuum in the intake manifold.
 
The primary use of this valve is to maintain the spinning of the turbocharger at a high speed. The air is usually recycled back into the turbocharger inlet (diverter or bypass valves), but can also be vented to the atmosphere (blow off valve). Recycling back into the turbocharger inlet is required on an engine that uses a mass-airflow fuel injection system, because dumping the excessive air overboard downstream of the mass airflow sensor causes an excessively rich fuel mixture-because the mass-airflow sensor has already accounted for the extra air that is no longer being used. Valves that recycle the air also shorten the time needed to re-spool the turbocharger after sudden engine deceleration, since load on the turbocharger when the valve is active is much lower than if the air charge vents to atmosphere.
 


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