摘要:
A locking device for a device (1) for varying the valve timing of gas exchange valves of an internal combustion engine, said device (1) comprising an element (3) which is attached to a crankshaft of the internal combustion engine and is in driving relationship with the crankshaft through a traction element, said device further comprising an element (4) attached rotationally fast to the camshaft (2), there being arranged between the two said elements (3, 4), at least two pressure chambers (5, 6) connected to a pressure medium supply and a hydraulically actuatable adjusting element (7) through which a connection for transmitting force from the element (3) attached to the crankshaft to the element (4) attached to the camshaft is established, and through which the two said elements (3, 4) can be made to rotate or be fixed relative to each other within an adjusting range. According to the invention, the element (4) attached to the camshaft (2) is arranged so as to penetrate axially through the element (3) attached to the crankshaft and comprises a free end (8) outside of the device (1), on which free end (8) is arranged a sealed locking element which is connected hydraulically to one or more of the pressure chambers (5, 6) of the device (1) while being axially displaceable on an axial guide (9), and with which locking element, when the pressure of the hydraulic medium falls below a pressure required for displacing the adjusting element (7) of the device, a non-rotatable force transmission connection between the element (3) attached to the crankshaft and the element (4) attached to the camshaft (2) in one or more angular positions thereof relative to each other can be established independently of the adjusting element (7) with the help of an auxiliary energy.
摘要:
A device for changing the control times of gas exchange valves of an internal combustion engine, including a drive wheel in driving connection with a crankshaft and a vane wheel connected to rotate with a camshaft. A plurality of hydraulic working spaces are formed within the device and are divided by the vanes of the vane wheel into respectively A and B pressure chambers. The vane wheel can be mechanically coupled to the drive wheel by a locking element, which is displaceable by a spring element into a locking position within a seat in one of the sidewalls of the drive wheel, and is hydraulically moved into an unlocked position in the vane wheel upon application of pressure to the pressure chambers. The locking element is a generally uniform cylindrical locking pin, and is arranged in an axial bore in the hub of the vane wheel. The longitudinal axis of the axial bore has a smallest possible distance from the longitudinal mid-axis of the device. The seat has a generally quadrilateral shaped contour that is larger by a play on all sides than the cross sectional area of the locking element, and includes a worm groove opening into it for supplying pressure medium.
摘要:
A method for determining a wear value of a transmission element between a crankshaft and a camshaft of a reciprocating piston internal combustion engine, in particular a timing chain or toothed belt, is provided. The camshaft is driven by the transmission element via a drive part, for example a camshaft gearwheel. In each case, at least one measurement value for the phase position of the drive part relative to the crankshaft is determined at time intervals during which the crankshaft drives the camshaft, and the wear value is determined from the difference between the measurement values.
摘要:
An adjustment device (1) for adjusting the relative rotational angle position of a camshaft (2) in relation to a crankshaft of an internal combustion engine is provided, with the device having an adjustment mechanism (3), which is embodied as a triple-shaft transmission and provided with an input part (4) fixed to the crankshaft, an output part fixed to the camshaft, and an adjusting shaft (7) connected to an adjusting motor shaft (5) of an adjusting motor (6). The motor (6) is provided as an electric motor and is arranged parallel to the camshaft (2). The motor generates an adjustment torque that is transmitted to the adjustment shaft (7) via a secondary drive (18) that has a belt drive, a chain drive, a cardan drive, or an additional spur gear stage.
摘要:
A synchronization device for an engine is provided that has a first active sensor and a second active sensor. The first active sensor is adapted to determine an angular position of a first shaft and the second active sensor is adapted to determine the angular position of a second shaft. The first active sensor and the second active sensor are adapted to provide information on the state of the angular position of the first shaft and the second shaft or the angular position of the first shaft and the phase position between the first shaft and the second shaft to the control device. In addition, the control device is adapted to provide a control signal for setting a given phase difference between the first and the second shaft.
摘要:
A method for determining a wear value of a transmission element between a crankshaft and a camshaft of a reciprocating piston internal combustion engine, in particular a timing chain or toothed belt, is provided. The camshaft is driven by the transmission element via a drive part, for example a camshaft gearwheel. In each case, at least one measurement value for the phase position of the drive part relative to the crankshaft is determined at time intervals during which the crankshaft drives the camshaft, and the wear value is determined from the difference between the measurement values.
摘要:
A camshaft adjuster (1) having a variable ratio gear unit (2). Usually, a drive movement of an electrical actuating assembly (7) is transmitted into a variable ratio gear unit (2) of a camshaft adjuster (1) on the side which faces away from the camshaft (6). According to the invention, the abovementioned drive movement is transmitted in from the side of the variable ratio gear unit (2) which faces the camshaft (6). As a result, a further assembly, for example a vacuum pump, can be driven by the variable ratio gear unit (2) on the side of the variable ratio gear unit (2) which has become free and faces away from the camshaft (6). An actuating shaft (4) of the actuating assembly (7) is preferably mounted via a bearing (34) which is supported on a circumferential face of the camshaft (6). This results in a reduced axial overall size of the camshaft adjuster and extended possibilities for the arrangement of an actuating assembly and the connection of additional assemblies.
摘要:
A drive connection with a camshaft adjuster for an internal combustion engine is provided. A free end of the camshaft adjuster is coupled with an accessory unit, especially a vacuum pump, in a camshaft adjuster with a superposition drive and an electrical control unit. The electrical control unit (7) can be constructed as a hollow unit, through which a drive shaft of the accessory unit is passed.
摘要:
A camshaft adjuster including an electric servo motor (21) that is mounted in a first housing (14) and an electronics module (37), which supplies the servo motor (21) with electricity is provided. A second housing (26), which is separate from the first housing (14), is allocated to the electronics module and is attached by its exterior to the first housing (14). A wall (29) of the second housing (26) separates the servo motor (21) and the electronics module (37) to be mounted separately. A power supply and a logic element are integrated into the electronics module, allowing the camshaft adjuster to be operated as an autonomous unit.
摘要:
A drive connection with a camshaft adjuster for an internal combustion engine is provided. A free end of the camshaft adjuster is coupled with an accessory unit, especially a vacuum pump, in a camshaft adjuster with a superposition drive and an electrical control unit. The electrical control unit (7) can be constructed as a hollow unit, through which a drive shaft of the accessory unit is passed.