Carburettor and Intake

Submitted by xjcdadmin on Thu, 06/04/2009 - 16:52

CARBURETOR

The carburetor is a fully-enclosed type BS30; float chamber ventilation is opened to the surge tank, because the float chamber must always be under boost pressure in order to supply sufficient fuel to the venturi.

CARBURETOR SECTION VIEW

AIR

MIXTURE

FUEL

STARTER SYSTEM

AIR

MIXTURE

FUEL

PRESSURE-SEALED CARBURETORS

These carburetors have been specifically developed for use with a turbocharger. Because they are subjected to high intake pressures created by the turbocharger, they too must be pressurized to work effectively. To achieve this, the throttle valve shaft and starter plunger have 0 rings to prevent pressure leaks, and to ensure that they do not leak, special passages deliver pressurized air to complete the seal. Air will leak from the throttle shaft and starter plunger O-rings, but this is normal. Should, however, fuel begin to leak from these passages, the carburetor must be serviced immediately.

THROTTLE VALVE SHAFT (A)

STARTER PLUNGER IBI

AIR CLEANER AND CRANKCASE VENTILATION SYSTEM

FRESH AIR

BLOW-BY GAS