Valve arrangement and valve guide
AssigneeVolvo Truck Corporation
InventorsStig Arne Svensson, Lennart Langervik
Life of this patent
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AssigneeVolvo Truck Corporation
InventorsStig Arne Svensson, Lennart Langervik
Estimating the term…
A valve arrangement is provided for supplying air to a combustion chamber of an internal combustion engine, the valve arrangement including a first valve, the first valve including a first valve head, a first valve stem and an internal cavity, which is partly located in the first valve stem and open towards a lower surface of the first valve head, a valve guide arranged to surround a portion of the first valve stem such that the first valve stem is movable in the valve guide along a longitudinal direction between an upper, closed position of the valve, and a lower, open position, in which open position air may be supplied to the combustion chamber past the first valve head, the valve guide including an air passage allowing supply of additional air to the combustion chamber via the internal cavity in the first valve, when the first valve is in its closed position. The valve arrangement includes a guide leakage preventing means for preventing liquid from leaking from a region externally of the first valve stem to the valve guide air passage.
A valve arrangement for supplying air to a combustion chamber of an internal combustion engine, the valve arrangement comprising a first valve, the first valve comprising a first valve head, a first valve stem and an internal cavity, which is partly located in the first valve stem and open towards a lower surface of the first valve head, a second valve at least partly arranged within the cavity of the first valve, the second valve comprising a second valve head and a second valve stem arranged at least partly within the first valve stem, wherein the second valve head is arranged for interaction with a valve seat in the first valve head for controlling supply of additional air to the combustion chamber via the internal cavity in the first valve, a valve guide arranged to surround a portion of the first valve stem such that the first valve stem is movable in the valve guide along a longitudinal direction between an upper, closed position of the valve, and a lower, open position, in which open position air may be supplied to the combustion chamber past the first valve head, the valve guide comprising an air passage allowing supply of additional air to the combustion chamber via the internal cavity in the first valve, when the first valve is in its closed position, and a guide leakage preventing means for preventing liquid from leaking from a region externally of the first valve stem and located longitudinally above the valve guide air passage to the valve guide air passage, the guide leakage preventing means comprising a liquid drainage means for draining liquid from the region, wherein the liquid drainage means is arranged to drain liquid from the region to another region formed between the first valve stem and the valve guide, the other region being located longitudinally below the valve guide air passage.
Dependencies are inferred from the claim text.