Method for cooling exhaust valves of reciprocating internal combustion engines, means for the purpose of implementing the method and engines provided with these means

摘要

The invention relates to a method for cooling exhaust valves of reciprocating internal combustion engines. It is characterised in that the cams 18 of the exhaust valves 14 are designed so that the exhaust valve 14 is kept slightly open during the beginning of the compression phase, as a result of which it is with the pressure due to this start of compression that part of the fresh gases which have been brought in during the inlet phase are then propelled onto the walls of the exhaust valve 14 and of its seat 16. Application to the mechanical industry and particularly to the construction of two- and four-stroke internal combustion engines.