Secondary air system for an internal combustion engine
AssigneeFilterwerk Mann & Hummel GmbH
InventorsOlaf Weber, Holger Paffrath
Life of this patent
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Abstract
A secondary air system for an internal combustion engine (32), including at least one line (14) through which air is blown into the exhaust pipe of the engine, a pump (26) and a drive (27) for the pump (26). In addition an air-feed line (13) is provided through which the secondary air is supplied to the pump (26). The power necessary to drive the pump is provided by the engine (32).
Claims16
A secondary air system for an internal combustion engine which draws intake air through an intake duct and a throttle valve, said secondary air system comprising at least one line for blowing secondary air into an exhaust pipe of the internal combustion engine, a pump, a drive for the pump, and a supply line for supplying the secondary air to the pump, wherein the drive for the pump is a turbine powered by the pressure drop between the pressure of the intake air drawn in by the internal combustion engine and the pressure of the intake air following the throttle valve.
Dependencies are inferred from the claim text.