Internal-combustion engines – Valve – Rotary
Patent
1999-12-03
2000-10-31
Argenbright, Tony M.
Internal-combustion engines
Valve
Rotary
12318455, 12319017, F01L 700, F02M 3510
Patent
active
061386286
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a camshaft controller, especially for use in an induction manifold system for a multicylinder internal combustion engine.
A camshaft controller of this kind is disclosed, for example, in U.S. Pat. No. 4,932,369. It is disposed in an air induction system, an induction manifold being provided from which individual intake tubes arranged side by side lead to a flange. This air induction system is fastened by this flange to the cylinder head of a multicylinder internal combustion engine. The individual intake tubes are intersected by a longitudinal bore. In this longitudinal bore a camshaft controller is provided, which is configured such that the length of the air intake tube is varied by turning it.
Furthermore, an induction tube apparatus for a multicylinder internal combustion engine is disclosed in DE-OS 4344504. It too has a camshaft controller which is disposed in a longitudinal bore, and the camshaft controller can be used to connect or disconnect additional ducts.
If the induction system consists of plastic, it is necessary to equalize manufacturing tolerances by appropriate elements, such as an impressed metal sleeve. Manufacture thus becomes very expensive. Moreover there is the problem that any recycling of the plastic component and the incorporated metal sleeve is impossible or possible only after a corresponding complicated disassembly.
SUMMARY OF THE INVENTION
It is the object of the invention to avoid the described disadvantages and to provide a camshaft controller which is well sealed and in which tolerances are effectively compensated.
This object is achieved by the invention as described and claimed hereinafter.
The substantial advantage of the invention is that the camshaft controller has sealing elements associated with the individual intake tubes, the sealing elements having a negligible effect on the torque required for driving the camshaft controller.
In an especially advantageous embodiment of the invention, the sealing element is made up of two sealing bars which are parallel to one another and are joined at their ends by radially elastic ring elements. Thus a sealed window is formed, which due to the elasticity of the ring elements is in resilient contact between the camshaft controller and the inner wall of the longitudinal bore and thus reliably seals each individual passage and each flow cross section of the individual intake tubes. The sealing element can be disposed at the entrance or exit opening of the induction tube. It is useful to provide it where it produces the best effect.
An advantageous embodiment of the invention furthermore consists in fixing the ring elements in grooves in the camshaft controller. The ring elements in that case are snapped like a clamp over the camshaft controller and seal the latter in the manner of a piston ring.
An additional embodiment of the camshaft controller provides for forming the latter of individual segments. In that case the segments are joined together such that, on the one hand, a great torsional stiffness is achieved, but on the other hand a certain radial mobility remains in order to compensate tolerances.
It is furthermore advantageous to provide at least one end of the camshaft controller with a bearing, the bearing bush being fastened in a socket of the induction system with a resilient element interposed. The interposition of the resilient element damps vibrations and also results in compensation of tolerances.
The rotation of the camshaft controller is advantageously effected by an actuator. This can be an electric motor, a vacuum box or any desired hydraulically or mechanically driven element. The adjusting motion is advantageously transferred by a radially movable claw clutch.
In addition, a clutching or connection between the actuator and the camshaft controller can be performed by a pin and bushing, the latter being connected together with the interposition of a damping element, such as an O-ring for example. The use of the camshaft controller is possible wherever a du
REFERENCES:
patent: 4019487 (1977-04-01), Guenther
patent: 4932369 (1990-06-01), Parr
patent: 5048469 (1991-09-01), Spray
patent: 5438964 (1995-08-01), Breidenbach
patent: 5526780 (1996-06-01), Wallis
patent: 5829403 (1998-11-01), Suzuki et al.
patent: 5870988 (1999-02-01), Fujimori et al.
patent: 5901677 (1999-05-01), Ohrnberger et al.
patent: 5979389 (1999-11-01), Espe et al.
Alex Matthias
Ernst Volker
Geiger Michael
Klotz Arthur
Kosicki Juergen
Argenbright Tony M.
Filterwerk Mann & Hummel GmbH
Huynh Hai
LandOfFree
Camshaft controller, in particular for use in an induction manif does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Camshaft controller, in particular for use in an induction manif, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Camshaft controller, in particular for use in an induction manif will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2040517