Crankcase ventilation system
AssigneeDr. Ing. h.c.F. Porsche Aktiengesellschaft
InventorWalter Topfer
Life of this patent
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Abstract
A ring-shaped duct, which is connected to a coolant circulating system, extends in a throttle valve housing in an air intake section of an internal-combustion engine. A ventilating pipe for the crankcase gases is connected to the throttle valve housing, is divided into branches in the throttle valve housing and leads into ventilating points in front of and behind the throttle valve. The coolant, which circulates in the ring-shaped duct, simultaneously prevents an icing of the throttle valve and of the ventilating points.
Claims10
A crankcase ventilation system for an internal-combustion engine, having a main ventilating point arranged in a throttle valve housing and leading into the intake air flow in front of a throttle valve, having a secondary ventilating point arranged behind the throttle valve, and having a ventilating pipe leading from the internal-combustion engine into a throttle valve housing, the throttle valve housing being connected to a coolant circulating system and being heated by it, wherein the ventilating pipe, inside the throttle valve housing, branches into a duct leading to the main ventilating point and a duct leading to the secondary ventilating point
Dependencies are inferred from the claim text.