Lubricating oil supply system for rotary engine

Claim 1

In combination with a rotary internal combustion engine of the fuel injection type having an intake port, a mixture supply pipe connected to an air inlet and communicating with said intake port, a fuel injection nozzle mounted in said mixture supply pipe downstream of said air inlet and adapted for injecting fuel toward a limited part of a wall of said mixture supply pipe downstream of said fuel injection nozzle, a lubricating oil supply system comprising a source of lubricating oil, a metering pump communicating with said source of lubricating oil, a lubricating oil supply pipe communicating with said source of lubricating oil through said metering pump, a lubricating oil supply unit mounted on an outer wall of said mixture supply pipe and having a lubricating oil distributing chamber communicating with said lubricating oil supply pipe and opening into said mixture supply pipe at the limited part thereof, and a diffuser mounted in the wall of said mixture supply pipe at the limited part thereof in the path of fuel spray from said fuel injection nozzle, said lubricating oil distributing chamber of said unit distributing lubricating oil into said mixture supply pipe through said diffuser, whereby the lubricating oil is uniformly diffused into fine droplets which are mixed with the mixture of air and fuel to be supplied to the engine.