Back to results
US 2004/0168660 A1Published application
Apparatus for an internal combustion engine
AssigneeVolvo Lastvagnar AB
InventorsPer Persson, Jan Arnell, Johan Remmelgas
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeVolvo Lastvagnar AB
InventorsPer Persson, Jan Arnell, Johan Remmelgas
Estimating the term…
Method and apparatus for providing an internal combustion engine which for each cylinder, with the associated piston, has at least one inlet valve and at least one exhaust valve (10) for controlling the connection between the combustion chamber in the cylinder and an intake system and an exhaust system, respectively. A rotatable camshaft (18) with a cam (22) is designed to interact with a first cam follower (17) and a second cam follower (20) in order to switch between two different operating modes. The cam followers are mounted on a pivotal rocker arm (13), the second cam follower (20) being hydraulically adjustable between two positions by means of a piston (21) located in a hydraulic cylinder. The hydraulic cylinder is connected to a hydraulic fluid source via a hydraulic fluid duct and the piston can be moved from one position to the other by the action of a quantity of hydraulic fluid delivered to the hydraulic cylinder.
An apparatus for an internal combustion engine in which for each cylinder and associated piston, at least one inlet valve and at least one exhaust valve is provided for respectively controlling connection between a combustion chamber of the cylinder and an intake system and an exhaust system, a rotatable camshaft and cam thereupon are configured to interact with first and second cam followers in order to switch between two different operating modes, said apparatus comprising:
An apparatus for controlling the activity of inlet and exhaust pistons that cooperate with inlet and exhaust ports, respectively, of an internal combustion engine, the apparatus comprising:
Dependencies are inferred from the claim text.