Multi-cylinder internal combustion engine

Claim 1

A multi-cylinder internal combustion engine, some of the cylinders operating in cycle phases displaced relative to each other, comprising a plurality of cylinders each having a cylinder head and an inlet valve and an outlet valve, said plurality of cylinders constituting at least two cylinder units, one common carburettor means for feeding an air-fuel mixture to all of said plurality of cylinders and centrally disposed relative thereto, a common intake manifold having an elongated central portion communicatingly centrally connected to said carburettor means, and said common intake manifold having branched end portions communicating with said elongated central portion and to said plurality of cylinders at said inlet valves, respectively, cam control means for opening said inlet valves after closing of said outlet valves, respectively, means for operatively completely sealing said inlet valves and said respective cylinders from said intake manifold at inlet sides of said cylinder heads, respectively, at least two check valve means in said elongated central portion of said intake manifold operatively coordinated to each of said cylinder units, respectively, said two check valve means being disposed in said elongated central portion of said common intake manifold adjacent to and on opposite sides of said carburettor means, respectively, one of said check valve means for automatically opening by means of suction from a first of and said cylinder units coordinated thereto via an opening of said inlet valve of said first cylinder unit, and with another of said check valve means for automatically simultaneously closing when said inlet valve of a coordinated second of said cylinder units operatively with phase displaced cycle relative to that of said first cylinder unit is closed, said one and said another of said check valve means reversing in operation is reversed cycle phases respectively of the coordinated cylinder units and inlet valves, and said carburettor means including a nozzle forming a nozzle opening having a bottom fuel outlet, and a carburettor nozzle pin means operatively connected to an accelerator pedal and said nozzle pin means being formed conically on a lower end thereof adjustably axially moveably cooperatively positioned and guided in said nozzle opening for regulating said fuel outlet of said nozzle opening, said nozzle opening and said lower end of said nozzle pin means are cooperatively formed such that at full load, and at each adjustment position of said nozzle pin means relative to said nozzle opening, respectively, the correct air-fuel mixture for the stoichiometrical equilibrium is provided, thereby for providing correct dosed fuel admission into said manifold for stoichiometric equilibrium at each adjustable position.