A spark-ignition internal-combustion engine, in particular of a supercharged and preferably a gasoline engine, is equipped with a system for variable actuation of the intake valves (7) including a pressurized fluid chamber (C) set between the intake valve ...

An intake system for an internal combustion engine includes: a cylinder block in which a combustion chamber is formed; a cylinder head in which a plurality of intake ports to introduce the combustion air into the combustion chamber are formed; a cylinder h...

An engine valve operating system is provided that includes a variable valve lift mechanism in which, when there is a possibility that the rotational speed of the engine might increase beyond an allowed rotational speed due to a downshift error in a manual ...

A control for avoiding interference between a valve and a piston of an engine is provided. The engine has a variable lift mechanism that is capable of changing a lift amount of the valve and a variable phase mechanism that is capable of changing a phase of...

A method of operating an internal combustion engine (110), including at least one cylinder (112) and a piston (212) slidable in the cylinder, may include supplying pressurized air from an intake manifold (114) to an air intake port (208) of a combustion ch...

The object of the invention is a distribution for the four-stroke engines, made up of guillotine valves (1) parallely placed to the axis of the cylinder (9) and over the heading, or horizontally placed to this last one. The valves (1) move in a rectilinear...

A process for a mixture for a direct injection, independently ignited combustion engine measures air according to the continuously adjustable opening state of the inlet valve and injects fuel through a multi-hole high-pressure nozzle into a valve stroke-de...

In a four stroke engine which has two admission valves and two exhaust valves at light loads the first exhaust valve (1) opens conventionally during the exhaust stroke and the second exhaust valve (2) opens for part of the exhaust stroke and most of the ad...