Abstract: An electrohydraulic control module is provided for making available a compressed fluid, especially compressed oil for actuators, which are used for actuating control units, for example, for switching gas-exchange valves of an internal combustion engine on and off, with a control housing, which is attached to a connection part of the internal combustion engine and which has electrical switching valves that are connected to an oil supply line and to control oil lines leading to the actuators. The production and assembly expense of the electrohydraulic control modules is reduced in that an intermediate housing (6), which is injection molded from plastic and which has at least the oil supply line and the control oil lines (17), is clamped between the connection part (5) and the control housing (7).

Abstract: In a guide gib for the valve operating mechanism of an internal combustion engine, having holding spaces (12, 13), which are arranged in the gib (8) at intervals one behind the other, for valve tappets, wherein to prevent a valve tappet from rotating about its central longitudinal axis in each case, flattened portions (14, 15) are formed within the associated holding space (12, 13) of the guide gib (8), it being possible for flattened portions of the valve tappet to bear against said flattened portions (14, 15), according to the invention, the guide gib (8) is formed by a plastic support (9) and a plurality of inlay parts (10, 11) which are provided with the holding spaces (12, 13), each of said inlay parts (10, 11) being made of a higher-strength material than the material of the plastic support (9) and being inserted into the plastic support (9).

Abstract: An electrohydraulic control module is provided for making available a compressed fluid, especially compressed oil for actuators, which are used for actuating control units, for example, for switching gas-exchange valves of an internal combustion engine on and off, with a control housing, which is attached to a connection part of the internal combustion engine and which has electrical switching valves that are connected to an oil supply line and to control oil lines leading to the actuators. The production and assembly expense of the electrohydraulic control modules is reduced in that an intermediate housing (6), which is injection molded from plastic and which has at least the oil supply line and the control oil lines (17), is clamped between the connection part (5) and the control housing (7).

Abstract: The invention proposes a valve train (1) of an internal combustion engine comprising a tappet (7) and a tappet pushrod (1) that is actuated by said tappet (7), said tappet pushrod (1) being at least partly hollow and comprising on one end (3), a first support (4) for a pressure piston (5) of a hydraulic lash adjuster (6) of said tappet (7) that follows a periodic driving element such as a cam. A second support (9) for a follower member (2) such as a rocker arm is arranged on a further end (8) of the tappet pushrod (1). The first support (4) comprises a passage (10) for hydraulic medium that can be routed out of the pressure piston (5) during operation of the internal combustion engine into an interior (11) of the tappet pushrod (1), a one-way valve means (12) being installed in the tappet pushrod (1) for retaining a hydraulic medium column during a standstill of the internal combustion engine.

Abstract: The invention proposes a valve train of an internal combustion engine comprising a tappet (7) and a tappet pushrod (1) that is actuated by said tappet (7), said tappet pushrod (1) being at least partly hollow and comprising on one end (3), a first support (4) for an at least indirectly contacting pressure piston (5) of a hydraulic lash adjuster (6) of said tappet (7) that follows a periodic driving element, typically a cam. A second support (9) for a follower member (2), typically a rocker arm, is arranged on a further end (8) of the tappet pushrod (1). The first support (4) comprises a passage (10) for hydraulic medium that can be routed out of the pressure piston (5) during operation of the internal combustion engine into an interior (11) of the tappet pushrod (1), wherein a pipette means (12) is installed in the tappet pushrod (1) for retaining a hydraulic medium column during a standstill of the internal combustion engine.

Abstract: In a guide gib for the valve operating mechanism of an internal combustion engine, having holding spaces (12, 13), which are arranged in the gib (8) at intervals one behind the other, for valve tappets, wherein to prevent a valve tappet from rotating about its central longitudinal axis in each case, flattened portions (14, 15) are formed within the associated holding space (12, 13) of the guide gib (8), it being possible for flattened portions of the valve tappet to bear against said flattened portions (14, 15), according to the invention, the guide gib (8) is formed by a plastic support (9) and a plurality of inlay parts (10, 11) which are provided with the holding spaces (12, 13), each of said inlay parts (10, 11) being made of a higher-strength material than the material of the plastic support (9) and being inserted into the plastic support (9).

Abstract: A hydraulic lash adjuster (1) for a valve train (16) of an internal combustion engine, said hydraulic lash adjuster (1) comprising a hollow cylindrical housing (2) and a pressure piston (3) that are axially inter-inserted for axial displacement relative to each other, a bottom (4) of the pressure piston (3) comprising a central passage (5) for hydraulic medium from a reservoir (6) enclosed by the pressure piston (3) into a high pressure chamber (8) situated between the bottom (4) of the pressure piston (3) and an opposing bottom (7) of the housing (2), said passage (5) comprising, on an end (9) oriented toward the high pressure chamber (8), a one-way valve (10) that opens toward the high pressure chamber (8), wherein a flexible disk-shaped body (11), that is capable of floating on the hydraulic medium, extends within the reservoir (6). In this way, a “break-through” of air from the reservoir (6) into the high pressure chamber (8) is avoided.

Abstract: The invention proposes a valve train (1) of an internal combustion engine comprising a tappet (7) and a tappet pushrod (1) that is actuated by said tappet (7), said tappet pushrod (1) being at least partly hollow and comprising on one end (3), a first support (4) for a pressure piston (5) of a hydraulic lash adjuster (6) of said tappet (7).that follows a periodic driving element such as a cam. A second support (9) for a follower member (2) such as a rocker arm is arranged on a further end (8) of the tappet pushrod (1). The first support (4) comprises a passage (10) for hydraulic medium that can be routed out of the pressure piston (5) during operation of the internal combustion engine into an interior (11) of the tappet pushrod (1), a one-way valve means (12) being installed in the tappet pushrod (1) for retaining a hydraulic medium column during a standstill of the internal combustion engine.

Abstract: The invention proposes a valve train of an internal combustion engine comprising a tappet (7) and a tappet pushrod (1) that is actuated by said tappet (7), said tappet pushrod (1) being at least partly hollow and comprising on one end (3), a first support (4) for an at least indirectly contacting pressure piston (5) of a hydraulic lash adjuster (6) of said tappet (7) that follows a periodic driving element, typically a cam. A second support (9) for a follower member (2), typically a rocker arm, is arranged on a further end (8) of the tappet pushrod (1). The first support (4) comprises a passage (10) for hydraulic medium that can be routed out of the pressure piston (5) during operation of the internal combustion engine into an interior (11) of the tappet pushrod (1), wherein a pipette means (12) is installed in the tappet pushrod (1) for retaining a hydraulic medium column during a standstill of the internal combustion engine.

Abstract: A switchable cam follower (1) or a switchable support element of a valve train of an internal combustion engine, said cam follower or support element comprising an outer part (2) which is assembled together with an inner part (4) that is displaceable relative thereto in a direction of cam lift, said inner part (4) comprising, at a parting gap (5) to the outer part (2), two spaced apart or opposing openings (6, 7) for coupling means, each of said openings (6, 7) being aligned, at one cam position, to a further opening (10, 11) for coupling means in the outer part (2), the coupling means being configured and arranged so that, in a coupled state, each coupling means extends beyond the parting gap (5) on one coupling side (12, 13) while simultaneously extending in the opening (10, 6) of the outer and the inner part (2, 4) which in an uncoupled position of the coupling means (14, 15), an axial idle stroke of the coupling means (15) on the one coupling side (12) till coupling is achieved is large and the axial idle

Abstract: The invention proposes a tappet (1) in a valve train of an internal combustion engine having a bottom camshaft for acting on a tappet push rod, said tappet being arranged with a housing (2) for axial displacement, but secured against rotation, in a guide bore (3) of the internal combustion engine (3a) or of a component connected to the internal combustion engine, said housing (2) comprising on one front end (4), two cheek-like extensions (5) that are situated diametrically opposite each other and are connected by an axle (6) on which a rotary roller (7) extends for making direct contact with a cam, said front end (4) comprising a transverse region (8) that connects the extensions (5) axially inside and has a cylindrical shape in a length direction of the roller (7), and said guide bore (3) being intersected by two passages (12, 13) for routing hydraulic medium to the tappet (1), wherein a radius center point (M) of the transverse region (8) of the one front end (4) is situated with a lateral offset to a longi

Abstract: A device for controlling cylinder disconnection in internal combustion engines, with a control device which permits in one of its two switching states an actuation of the valve concerned, with transmission devices which, in dependence on the switching state of the control device, transmit the cam stroke to the valve, and with a control unit acting on the control device. This provides a high switch over reliability with only small requirements for the changeover technology used. For this, the device has a data memory for the detection of the time course of the movement behavior of the gas exchange valves of cylinders of the internal combustion engine, and a data processing unit which provides a combination of gas exchange valves into valve groups with regard to a common activation or deactivation.

Abstract: An internal combustion engine having a valve train that includes a switchable cam follower is provided. The cam follower (20) has a generally cylindrical shape and can move longitudinally in a receptacle (21) of the engine (22), and is acted upon at one axial end by a cam (23) of a camshaft and at the other axial end indirectly or directly by a gas exchange valve of the valve train. A main oil gallery (24) is arranged in the internal combustion engine (22) for introducing hydraulic medium to a valve lash adjustment element arranged in the cam follower (20).

Abstract: A switchable cam follower (1) or a switchable support element of a valve train of an internal combustion engine, said cam follower or support element comprising an outer part (2) which is assembled together with an inner part (4) that is displaceable relative thereto in a direction of cam lift, said inner part (4) comprising, at a parting gap (5) to the outer part (2), two spaced apart or opposing openings (6, 7) for coupling means, each of said openings (6, 7) being aligned, at one cam position, to a further opening (10, 11) for coupling means in the outer part (2), the coupling means being configured and arranged so that, in a coupled state, each coupling means extends beyond the parting gap (5) on one coupling side (12, 13) while simultaneously extending in the opening (10, 6) of the outer and the inner part (2, 4) which in an uncoupled position of the coupling means (14, 15), an axial idle stroke of the coupling means (15) on the one coupling side (12) till coupling is achieved is large and the axial idle

Abstract: A hydraulic system (1) for a switchable valve drive element (10) of an internal combustion engine (33) is provided and includes a throttled connection (13) created from a second channel (9), used to actuate a hydraulic play-compensation element (11) using hydraulic fluid, directly to an external radial side (12) of a coupling element (8). The coupling element (8) is supplied by a first channel (7) with the switching hydraulic pressure. These measures make it possible to keep the first channel (7) as free as possible of undesired air.

Abstract: An internal combustion engine having a valve train that includes a switchable cam follower is provided. The cam follower (20) has a generally cylindrical shape and can move longitudinally in a receptacle (21) of the engine (22), and is acted upon at one axial end by a cam (23) of a camshaft and at the other axial end indirectly or directly by a gas exchange valve of the valve train. A main oil gallery (24) is arranged in the internal combustion engine (22) for introducing hydraulic medium to a valve lash adjustment element arranged in the cam follower (20).

Abstract: The invention proposes a tappet (1) in a valve train of an internal combustion engine having a bottom camshaft for acting on a tappet push rod, said tappet being arranged with a housing (2) for axial displacement, but secured against rotation, in a guide bore (3) of the internal combustion engine (3a) or of a component connected to the internal combustion engine, said housing (2) comprising on one front end (4), two cheek-like extensions (5) that are situated diametrically opposite each other and are connected by an axle (6) on which a rotary roller (7) extends for making direct contact with a cam, said front end (4) comprising a transverse region (5) that connects the extensions (5) axially Inside and has a cylindrical shape in a length direction of the roller (7), and said guide bore (3) being intersected by two passages (12, 13) for routing hydraulic medium to the tappet (1), wherein a radius center point (M) of the transverse region (8) of the one front end (4) is situated with a lateral offset to a longi

Abstract: In a valve drive for an internal combustion engine, an elongated securing device or anti-rotation bridge referred to as a mounting aid has receptacle spaces, arranged at intervals one behind the other, for receiving respective valve tappets. Each valve tappet can be displaced longitudinally in its receptacle space. The tappet is secured against rotation by two parallel planar keying faces formed on its outer surface which bear against corresponding inner surfaces in a receptacle space of the mounting aid. The mounting aid has receptacle spaces with a relatively small interval dimension between the two inner surfaces for bearing against the keying faces of standard roller tappets and has receptacle spaces with a relatively large interval dimension between the two inner surfaces for bearing against the keying faces of switchable roller tappets.

Abstract: A device for controlling cylinder disconnection in internal combustion engines, with a control device which permits in one of its two switching states an actuation of the valve concerned, with transmission devices which, in dependence on the switching state of the control device, transmit the cam stroke to the valve, and with a control unit acting on the control device. This provides a high switch over reliability with only small requirements for the changeover technology used. For this, the device has a data memory for the detection of the time course of the movement behavior of the gas exchange valves of cylinders of the internal combustion engine, and a data processing unit which provides a combination of gas exchange valves into valve groups with regard to a common activation or deactivation.

Abstract: In a valve drive for an internal combustion engine, an elongated securing device or anti-rotation bridge referred to as a mounting aid has receptacle spaces, arranged at intervals one behind the other, for receiving respective valve tappets. Each valve tappet can be displaced longitudinally in its receptacle space. The tappet is secured against rotation by two parallel planar keying faces formed on its outer surface which bear against corresponding inner surfaces in a receptacle space of the mounting aid. The mounting aid has receptacle spaces with a relatively small interval dimension between the two inner surfaces for bearing against the keying faces of standard roller tappets and has receptacle spaces with a relatively large interval dimension between the two inner surfaces for bearing against the keying faces of switchable roller tappets.