Fuel injection type multiple cylinder engine unit

Claim 1

A fuel injection type multiple cylinder engine unit comprising: an oil-fuel supplying device including a lubricating oil supplying means; and an intake device arranged in operative association with the oil-fuel supplying device and including an intake pipe means; said oil-fuel supplying device comprising a vapour separator connected to a fuel tank disposed external to the engine unit through a duct means, a delivery pipe means connected to the vapour separator through a duct means, injector means provided for the delivery pipe means, said injector means comprising a plurality of injectors corresponding to the number of the cylinders, each of the injectors having a front end through which fuel is injected into the intake device, an oil pump-up means for pumping up oil from an oil tank, said oil pump-up means being provided with an oil intake side and an oil discharge side, and oil feeding pipe means comprising a plurality of oil feeding pipes corresponding to the number of cylinders, each of said oil feeding pipes having a base end connected to the discharge side of the oil pump-up means and a front end opened at a portion near the front end of a corresponding one of the injectors; and said intake device comprising an intake pipe means comprising a plurality of intake pipes corresponding to the number of cylinders, an inlet manifold coupled with the respective intake pipes through a lead valve holder so as to communicate with each other, a cylinder block coupled with a crank case and including cylinders and pistons, and a surge tank means disposed in association with the intake pipes, said surge tank means comprising a main surge tank integrally formed with the inlet manifold and sub-surge tanks integrally formed with the inlet manifold and the intake pipes between respective adjacent intake pipes, each of said sub-surge tanks communicating with the main surge tank through communication holes.