| 摘要 |
A water-cooled exhaust valve for an internal combustion engine with a stem formed with coolant inlet and outlet ducts and a head provided with an internal chamber assembled with said stem and with said chamber communicating with said ducts, and to a method for making said valve, said method consisting in screwing the endwise threaded stem into said head provided with an axial threaded bore opening into said chamber, for connecting same together, the mating threads of the stem and bore co-operating with a given relative clearance and locking the head and duct to each other in sealing relationship through brazing by means of a hard-solder filling the gaps of the threaded joint. |
