Fuel control for IC engine carburettor - has vacuum-operated piston oil-damped by movably suspended element in tube on piston

摘要

The combustion engine carburettor (13) comprises a piston (3), operated (4,6) by the intake duct (1) vacuum (via 5) to move a needle (9) controlling the available cross-section of a fuel nozzle (8) arranged upstream of the throttle (2) in the duct. The piston movement increasing this cross-section is damped via an oil-filled tube (10) which is fixed to the pistond surrounds a damping element (11) suspended in the carburettor housing (13). The element is movably suspended to permit its limited swivel and axial movement at the lower end of a rod (12) retained in the housing. The axial movement may close a non-return valve in the element when the piston moves upwards.