Abstract:
The invention relates to a method of producing a composite shaft comprising a shaft body (1), at least one first component (2, 9) connected to the shaft body (1) in a rotationally fixed manner, and at least one second component (3, 8) rotatable relative to the shaft body (1), in which method the at least one first component (2, 9) and the at least one second component (3, 8) are pushed onto the shaft body and assembled in the intended sequence. In order to be able to produce such shafts in a simpler and more cost-effective manner and in order to be able to finish-machine the components connected to the shaft body (1) in a rotationally fixed manner only after the complete assembly of the composite shaft, it is proposed according to the invention that at least the first component (2, 9) connected to the shaft body (1) in a rotationally fixed manner be subjected to a machining operation and that the at least one second component (3, 8) be screened from the at least one first component (2, 9) during this machining in such a way that chips produced during the machining of the first component (2, 9) do not penetrate into the space between the second component (3, 8) and the shaft body (1) or between the second component (3, 8) and a third component (21) connected to the shaft body (1) in a rotationally fixed manner.
Abstract:
The present invention provides a method for measuring a clearance (13) between facing surfaces of a first member (11) and a second member (12). The method includes a step (S1) of bringing a pair of probes each having a tip end (14) slightly larger than the clearance (13) into direct contact with the clearance (13) and measuring a separation distance between the two tip ends (14), and a calculating step (S2) of calculating and measuring a clearance value (d1) on the basis of the separation distance between the tip ends (14).
Abstract:
A method for manufacturing a hollow engine valve includes inserting a half-finished hollow shaft section in sequence into die holes which have different hole shapes, and sequentially drawing so as to reduce the outer diameter and the inner diameter of the hollow shaft section and stretch its length in stages. The half-finished product is subjected to heat treatment so that the hardness thereof is lower than or equal to a predetermined level. A shaft end sealing section is formed by increasing the wall thickness of the opening end of the hollow shaft section toward the inside of the opening and the gap in the shaft end sealing section is welded.
Abstract:
A rocker arm may include a first arm defining a first longitudinal bore and a second arm defining a second longitudinal bore. The rocker arm may house a locking assembly including a first actuation pin extending through a first radial passage in the rocker arm, a second actuation pin extending through a second radial passage in the rocker arm, and a first lock pin located in the first longitudinal bore between the first and second actuation pins. An actuation assembly may be engaged with the first and second actuation pins and may be linearly displaceable between first and second actuation positions. The first and second arms may be rotatable relative to one another when the actuation assembly is in the first actuation position and may be fixed for rotation with one another when the actuation assembly is in the second actuation position.
Abstract:
A method of detecting a gap between a valve seat insert and a port in a cylinder head may include heating the valve seat insert and the cylinder head and generating a thermal image of the valve seat insert and the cylinder head at an interface between the valve seat insert and corresponding port in the cylinder head housing the valve seat insert. The thermal image may be evaluated to determine the magnitude of a gap between the valve seat insert and the cylinder head based on a temperature at the interface between the valve seat insert and the cylinder head.
Abstract:
A cover has an aperture through which an accessory gains access to the interior side of the cover and a cavity. The accessory may be any kind of sensor or actuator. To secure the accessory to the cover, an adapter coupled to the cover is provided. In one example, the adapter has a cylindrical connection section that is spin welded into place in the cavity. In another example, the adapter has self-tapping threads that engage with the surface surrounding the cavity. The adapter also has tabs extending outwardly from the cover, the tabs having a proximate section and an engagement section. The accessory has a retaining orifice that couples with the tabs in a snap-fit relationship to secure the accessory to the cover.
Abstract:
A method may include locating first and second lobe members of a camshaft on a first shaft. The first shaft may include an annular wall defining a bore. The first lobe member may be located on a first portion of the first shaft and may define a first end of the camshaft. The second lobe member may be located on a second portion of the first shaft and may define a second end of the camshaft. The first shaft may be fixed from axial displacement and a tool may be displaced through the bore of the first shaft to fix the first lobe member to the first shaft. The fixing may include the first shaft being free from axial restraint in a first axial direction extending from the first portion of the first shaft to the second portion of the first shaft.
Abstract:
An apparatus for variable setting of control times of gas exchange valves of an internal combustion engine which has a drive element, an output element and a side cover. The drive element is brought into drive connection with a crankshaft, the output element is brought into drive connection with a camshaft, and the output element is arranged such that it can be pivoted with respect to the drive element. The side cover, which has a sealing cover with an opening and a mating element, axially delimits the output element and/or the drive element, and is connected in a rotationally fixed manner to the drive or output element by means of a fastening element. The fastening element reaches at least partially through the opening and interacts with the fastening element producing a rotationally fixed connection between the side cover and output element or drive element.
Abstract:
A lift of a valve of an engine may continuously be varied by an apparatus that includes: an input cam provided on an input shaft; a pivot shaft provided in parallel with the input shaft; a lever that rotates around the pivot shaft by a rotation of the input cam and operates the valve; and a lift varying device capable of varying a relative distance between the pivot shaft and the input shaft.
Abstract:
A shaft comprising functional elements, such as an assembled camshaft for an internal combustion engine, a method for producing such shafts, and internal combustion engines equipped with such shafts. The functional elements each have a bore and are produced separately from the shaft main body, and the bore is subsequently press fit onto the shaft body to attach the functional element in an axially and rotationally fixed manner. The shaft is also provided with at least one roller bearing that includes at least one undivided roller bearing element which is mounted on the shaft body between two functional elements, for example, by press fitting.