| 摘要 |
An outlet valve for combustion engines with a stem (2), a valve plate (4) with a seat (8) which divides the surface of the plate into a first and a second surface section (10, 12 resp.) which are located on the side of the plate (4) which faces towards and away from the stem (2) respectively. The stem (2) has a longitudinal first passage (6) for the supply of cooling air to the plate (4). In the plate (4) second passages (28) extend which communicate with the first passage (6) and which extend substantially radially outwards to near the seat (8), and which lead into the first surface section (10). A method for production of the valve comprises producing two plate parts (14, 16), and a number of channels (20) in one of the plate parts (14). The channels (20) extend radially from the centre of the plate part (14). In a plate part (14), which comprises the first surface section (10), there are provided a number of second passage sections (24), which lead into this surface section (10). The two plate sections (14, 16) are interconnected, whereby the plate part (16) which does not have the channels (20) closes these, thereby providing a first passage, which is closed in section, and one end of which communicates with the first passage (6), and the other end of which communicates with the second passage sections (24). |
