A camshaft adjusting system (1) is provided for a first camshaft (2) and a second camshaft (3) which are arranged concentrically with respect to one another, the second camshaft (3) being arranged within the first camshaft (2). A vane-cell type hydraulic camshaft adjuster (4) is configured for adjusting the first camshaft (2) and an electric camshaft adjuster (5) is configured for adjusting the second camshaft (3). A front cover (7) which is fastened to a stator (6) of the hydraulic camshaft adjuster (4) and which closes off the camshaft adjuster (4) at a side facing away from the camshaft has an internal toothing (8) for supporting a flex pot (9) which is attached to the second camshaft (3) and which is designed for receiving torque from the electric camshaft adjuster (5). A camshaft adjusting unit having the camshaft adjusting system (1) and two camshafts (2, 3) is also provided.

A camshaft adjusting system (1) is provided for a first camshaft (2) and a second camshaft (3) which are arranged concentrically with respect to one another, the second camshaft being arranged inside the first camshaft. A hydraulic camshaft adjuster (4) of the vane-cell type is set up for the adjustment of the first camshaft, and an electric camshaft adjuster (5) is set up for the adjustment of the second camshaft. A rotor contact flange (17) of an output ring (6) of the electric camshaft adjuster is arranged radially inside a first cover (23) of the hydraulic adjuster, the output ring which is equipped for the transmission of torque to the second camshaft is arranged at least partially radially and axially inside a rotor (7) of the hydraulic camshaft adjuster. A camshaft adjusting unit is also provided having a camshaft adjusting system of this type and two camshafts.

A camshaft adjusting system (1) is provided for a first camshaft (2) and a second camshaft (3) which are arranged concentrically with respect to one another, the second camshaft being arranged inside the first camshaft. A hydraulic camshaft adjuster (4) of the vane-cell type is set up for the adjustment of the first camshaft, and an electric camshaft adjuster (5) is set up for the adjustment of the second camshaft. A rotor contact flange (17) of an output ring (6) of the electric camshaft adjuster is arranged radially inside a first cover (23) of the hydraulic adjuster, the output ring which is equipped for the transmission of torque to the second camshaft is arranged at least partially radially and axially inside a rotor (7) of the hydraulic camshaft adjuster. A camshaft adjusting unit is also provided having a camshaft adjusting system of this type and two camshafts.

In an internal combustion engine, first and second rotating members, one for the intake valve and one for the exhaust valve rotate next to the outside of an engine cylinder on opposite sides thereof when driven by a drive gear attached to the end of the engine's crankshaft. Each rotating member may include a ring gear having a valve port or aperture near its perimeter that cyclically aligns with a corresponding valve port formed through the cylinder wall near the top of the cylinder. A method of controlling valve timing comprises the steps of causing the rotating member containing the second valve port to periodically align in synchronism with the first port to control the passage of an air/fuel mixture and exhaust gases through the combustion cycles of the engine.

In an internal combustion engine, first and second rotating members, one for the intake valve and one for the exhaust valve rotate next to the outside of an engine cylinder on opposite sides thereof when driven by a drive gear attached to the end of the engine's crankshaft. Each rotating member may include a ring gear having a valve port or aperture near its perimeter that cyclically aligns with a corresponding valve port formed through the cylinder wall near the top of the cylinder. A method of controlling valve timing comprises the steps of causing the rotating member containing the second valve port to periodically align in synchronism with the first port to control the passage of an air/fuel mixture and exhaust gases through the combustion cycles of the engine.

A valve drive for an internal combustion engine may include a camshaft, at least one cam follower, at least one adjusting device, and at least one control shaft. The camshaft may include at least one cam group. The at least one cam group may include a first cam and a second cam. The at least one cam follower may be drive-connected to the first cam in a first position and to the second cam in a second position. The at least one adjusting device may include a first adjustable engagement element and a second adjustable engagement element. alternately adjustable between a basic position and a switching position. The at least one control shaft may include at least one control element group including a first control element and a second control element adjustable to a switching element position and to a basic element position.

A valve drive for an internal combustion engine may include a camshaft, at least one cam follower, at least one adjusting device, and at least one control shaft. The camshaft may include at least one cam group. The at least one cam group may include a first cam and a second cam. The at least one cam follower may be drive-connected to the first cam in a first position and to the second cam in a second position. The at least one adjusting device may include a first adjustable engagement element and a second adjustable engagement element. alternately adjustable between a basic position and a switching position. The at least one control shaft may include at least one control element group including a first control element and a second control element adjustable to a switching element position and to a basic element position.

A valve drive for an internal combustion engine may include a cam shaft, at least one cam follower, at least one adjusting device, and at least one control shaft. The cam shaft may include at least one cam group that may include a first cam and a second cam The at least one adjusting device may include a first adjustable engagement element and a second adjustable engagement element. The at least one control shaft may include at least one control cam group that may include a first control cam and a second control cam. The first control cam may include a cam lobe corresponding to the first engagement element and the second control cam may include a cam lobe corresponding to the second engagement element. The at least one control shaft may be rotatable about a longitudinal axis between a starting position and a rotational position.

A valve drive for an internal combustion engine may include a cam shaft, at least one cam follower, at least one adjusting device, and at least one control shaft. The cam shaft may include at least one cam group that may include a first cam and a second cam The at least one adjusting device may include a first adjustable engagement element and a second adjustable engagement element. The at least one control shaft may include at least one control cam group that may include a first control cam and a second control cam. The first control cam may include a cam lobe corresponding to the first engagement element and the second control cam may include a cam lobe corresponding to the second engagement element. The at least one control shaft may be rotatable about a longitudinal axis between a starting position and a rotational position.

A water control, management and measurement system may include a hands-free water control system (100) that may comprise a chassis (104) securing a motor (117) attached to a motor driven gear (118) in geared attachment to a cold water gear (112) and a hot water gear (111) with the hot water gear and cold water gear sometimes in mechanical attachment to a manual on/off lever (110). Cartridge valves (120) may be disposed within manifolds (130) with the manifolds further retaining modular fittings (135). To facilitate hands-free operation, the water control system may be in communication with a foot pedal system comprising a foot pedal housing (350) the housing containing foot pedal in mechanical communication with a potentiometer (375).