Abstract: Device for coupling two valve activating levers of an internal combustion engine with at least one carrier body (1) mounted on the internal combustion engine, wherein at least one hollow shaft (2) in which oil of the internal combustion engine is stored is attached to the carrier body, and a coupling pin (9) is supported parallel to the hollow shaft (2) in each of the valve activating levers (4a, 4b) and is spring loaded on one side and loaded by pressurized fluid on the other side in such a way that the coupling pin (9) connects or releases the valve activating levers (4a, 4b), wherein control of the pressurized fluid that is taken advantageously from the oil circuit of the internal combustion engine is realized by at least one electromagnetically activated valve (14) and wherein the supply of pressurized fluid is realized by channels (13) that are provided in the carrier body (1) or carrier bodies of the internal combustion engine.

Abstract: The switchable hydraulic lash adjuster uses balls that move radially in order to lock and unlock the switchable elements in the hydraulic lash adjuster. An axially movable piston acts on the ball to force it to engage and to allow it to disengage the inner housing.

Abstract: The invention proposes a push-rod valve train having an adjustable valve tappet (1). This has an outer part (2a, 2b), an inner part (8) and a lost-motion spring (10), which forces the inner part (8) towards a relative position, at least one retainer ring (23), which is fixed in an annular groove (21) of the outer part (2a, 2b) and which interacts with a stop face (22) of the inner part (8), being provided for fixing the relative position, said retainer ring having lugs (28) extending radially inwards and separated by a fitting gap (27). In this the free movement of the valve push rod (15) relative to the lugs (28) is assured by the provision of a torsional locking means (30a, 30b), which serves to fix the radial position of the fitting gap (27) inside the annular groove (21).

Abstract: The switchable dual lifter has two hydraulic lash adjusters, one which is fixed within the common housing, and the other which is movable to allow for deactivation of one of the two valves acted on by the dual lifter. Using the dual lifter with a switchable hydraulic lash adjuster allows for closing of one of the adjacent valves while allowing the other of the adjacent valves to operate.

Abstract: A hydraulic cam follower for simultaneous actuation of several equal-acting gas-exchange valves, especially for a tappet pushrod valve train of an engine, includes an outer part, whose base forms a cam contacting surface, and from whose head hollow-cylindrical guides extend in the same number as the valves in a direction towards the base. A housing of a hydraulic play compensation element is provided in each guide and sits with its bottom side on an inside of the bottom of the outer part. A concentric pressure piston is guided in a borehole starting from a head end of each housing so it can move axially. A non-return valve is located at a bottom-side base of the piston and a high-pressure space is formed axially between the base and the bottom side of the housing. A reservoir for hydraulic medium is formed between the base and a head end of the piston.

Abstract: A switchable valve train for gas-exchange valves of internal combustion engines with a rocker arm device (1), in which a rocking motion about a rocker arm axis (3) can be introduced by at least one cam (2a, 2b), one tappet, or the like, wherein this rocking motion can be transmitted to at least one valve (4). The rocker arm device (1) is formed from at least one cam lever part (5) in working connection with the cam (2) and a valve lever part (6) in working connection with the valve (4), which are supported so that they can rock about the rocker arm axis (3). A coupling device is constructed between the cam lever part (5) and the valve lever part (6), in order to selectively engage and disengage the transmission of the rocking motion.

Abstract: The dual valve lifter assembly has a dual valve lift with two hydraulic lash adjusters therein and a guide for orienting and preventing rotation of the dual valve lifter. The guide has four ledges and the dual valve lifter has four flats which mate with the four ledges. The flats and the ledges prevent the rotation of the lifter. One pair of flats and one pair of ledges are spaced the same while the other pair of flats and the other pair of ledges are spaced at a different distance than the first pair of flats and ledges. The difference in the spacing of the pairs of ledges and flats allows for correct orientation of the lifter when mating it with the guide.

Abstract: The low profile valve lifter assembly has flats inside the bore of the outer housing and walls are formed and extended down from the plate of the guide such that the walls align with the flats of the bore to prevent rotation of the lifter with the guide. A groove and protuberance are provided in the flats and on the side wall of the guide in order to properly orient the lifter with the guide. The flats can be connected to form a pocket and the walls of the guide can be connected to form a sleeve that mates with the pocket.

Abstract: A hydraulic cam follower (1), such as a roller tappet, is provided. This is used for the actuation of two identically operating gas-exchange valves and should be installed inclined to the direction of the force of gravity. The cam follower (1) comprises a pot-shaped housing (2), whose bottom (3) is provided with a roller as a cam contacting element (4). In the housing (2), two guides (5) extending parallel to the direction of the internal combustion engine are provided, in each of which a pressure piston (6) is arranged so that it can move axially, whose end (7) away from the housing is constructed as a support for contact with a respective tappet pushrod. Each pressure piston (6) encloses a reservoir (11) for hydraulic medium.

Abstract: A switchable double tappet (1) is provided, especially for a tappet-push rod valve train of an internal combustion engine, with a cylindrical housing (2), which is arranged so that it oscillates via its outer casing (3) in a guide (4) in the internal combustion engine side and which has a bore (5) on the camshaft side, in which an inner element (6) moves axially relative to this borehole, wherein, on one side, a cam contact surface (10) is intrinsic to this inner element on its end projecting past an edge (7) of the borehole (5) or lower head (9) running in the region of the edge (7) and also, on the other side, at least one coupling slide (11) is intrinsic in its interior in the decoupled case, and this coupling slide can be displaced partially for a coupled case in or under a respective catch surface (12) of the housing (2), wherein between an upper head (13) of the inner element (6) facing away from the lower head (9) and a lower side (14) of a crossbar (15) of the housing (2), at least one lost-motion spr

Abstract: A switchable double tappet (1) is provided, especially for a tappet-push rod valve train of an internal combustion engine, with a cylindrical housing (2), which is arranged so that it oscillates via its outer casing (3) in a guide (4) in the internal combustion engine side and which has a bore (5) on the camshaft side, in which an inner element (6) moves axially relative to this borehole, wherein, on one side, a cam contact surface (10) is intrinsic to this inner element on its end projecting past an edge (7) of the borehole (5) or lower head (9) running in the region of the edge (7) and also, on the other side, at least one coupling slide (11) is intrinsic in its interior in the decoupled case, and this coupling slide can be displaced partially for a coupled case in or under a respective catch surface (12) of the housing (2), wherein between an upper head (13) of the inner element (6) facing away from the lower head (9) and a lower side (14) of a crossbar (15) of the housing (2), at least one lost-motion spr

Abstract: The switchable hydraulic lash adjuster uses balls that move radially in order to lock and unlock the switchable elements in the hydraulic lash adjuster. An axially movable piston acts on the ball to force it to engage and to allow it to disengage the inner housing.

Abstract: Device for coupling two valve activating levers of an internal combustion engine with at least one carrier body (1) mounted on the internal combustion engine, wherein at least one hollow shaft (2) in which oil of the internal combustion engine is stored is attached to the carrier body, and a coupling pin (9) is supported parallel to the hollow shaft (2) in each of the valve activating levers (4a, 4b) and is spring loaded on one side and loaded by pressurized fluid on the other side in such a way that the coupling pin (9) connects or releases the valve activating levers (4a, 4b), wherein control of the pressurized fluid that is taken advantageously from the oil circuit of the internal combustion engine is realized by at least one electromagnetically activated valve (14) and wherein the supply of pressurized fluid is realized by channels (13) that are provided in the carrier body (1) or carrier bodies of the internal combustion engine.

Abstract: The freely rotatable hydraulic pivot element for an internal combustion engine has four oil inlets which are in fluid communication with the lash adjusting element inside the pivot element and in fluid communication with the oil gallery by using four more equally spaced oil inlets in the outer housing of the cylinder head while still in fluid communication therein. The use of four or more oil inlets are in the same radial plane of the outside cylindrical housing of the pivot element.

Abstract: The low profile valve lifter assembly has flats inside the bore of the outer housing and walls are formed and extended down from the plate of the guide such that the walls align with the flats of the bore to prevent rotation of the lifter with the guide. A groove and protuberance are provided in the flats and on the side wall of the guide in order to properly orient the lifter with the guide. The flats can be connected to form a pocket and the walls of the guide can be connected to form a sleeve that mates with the pocket.

Abstract: The dual valve lifter assembly has a dual valve lift with two hydraulic lash adjusters therein and a guide for orienting and preventing rotation of the dual valve lifter. The guide has four ledges and the dual valve lifter has four flats which mate with the four ledges. The flats and the ledges prevent the rotation of the lifter. One pair of flats and one pair of ledges are spaced the same while the other pair of flats and the other pair of ledges are spaced at a different distance than the first pair of flats and ledges. The difference in the spacing of the pairs of ledges and flats allows for correct orientation of the lifter when mating it with the guide.

Abstract: The switchable dual lifter has two hydraulic lash adjusters, one which is fixed within the common housing, and the other which is movable to allow for deactivation of one of the two valves acted on by the dual lifter. Using the dual lifter with a switchable hydraulic lash adjuster allows for closing of one of the adjacent valves while allowing the other of the adjacent valves to operate.

Abstract: The invention proposes a push-rod valve train having an adjustable valve tappet (1). This has an outer part (2a, 2b), an inner part (8) and a lost-motion spring (10), which forces the inner part (8) towards a relative position, at least one retainer ring (23), which is fixed in an annular groove (21) of the outer part (2a, 2b) and which interacts with a stop face (22) of the inner part (8), being provided for fixing the relative position, said retainer ring having lugs (28) extending radially inwards and separated by a fitting gap (27). In this the free movement of the valve push rod (15) relative to the lugs (28) is assured by the provision of a torsional locking means (30a, 30b), which serves to fix the radial position of the fitting gap (27) inside the annular groove (21).

Abstract: A switchable valve train for gas-exchange valves of internal combustion engines with a rocker arm device (1), in which a rocking motion about a rocker arm axis (3) can be introduced by at least one cam (2a, 2b), one tappet, or the like, wherein this rocking motion can be transmitted to at least one valve (4). The rocker arm device (1) is formed from at least one cam lever part (5) in working connection with the cam (2) and a valve lever part (6) in working connection with the valve (4), which are supported so that they can rock about the rocker arm axis (3). A coupling device is constructed between the cam lever part (5) and the valve lever part (6), in order to selectively engage and disengage the transmission of the rocking motion.

Abstract: A hydraulic cam follower (1), such as a roller tappet, is provided. This is used for the actuation of two identically operating gas-exchange valves and should be installed inclined to the direction of the force of gravity. The cam follower (1) comprises a pot-shaped housing (2), whose bottom (3) is provided with a roller as a cam contacting element (4). In the housing (2), two guides (5) extending parallel to the direction of the internal combustion engine are provided, in each of which a pressure piston (6) is arranged so that it can move axially, whose end (7) away from the housing is constructed as a support for contact with a respective tappet pushrod. Each pressure piston (6) encloses a reservoir (11) for hydraulic medium.