Internal-combustion engines – Accessories – Covers – trays – vibrators – corrosion inhibitors – air filters
Patent
1998-01-28
1999-05-11
Kamen, Noah P.
Internal-combustion engines
Accessories
Covers, trays, vibrators, corrosion inhibitors, air filters
553853, F02B77/00
Patent
active
059016817
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to an air filter. An air filter for internal-combustion engines, compressors and other air-intake machines is known from German Utility Model DE-GM 19 60 531. The filter housing of this air filter is flexibly connected to a clean-air duct and optionally also to an unfiltered-air inlet duct, the filter housing carrying two fork-shaped spring clips which are fixedly arranged at a distance from one another. These spring clips may engage in rubber parts which are arranged on the engine housing or on other vehicle parts and therefore fix the air filter housing.
A disadvantage of this arrangement is the fact that this connecting method does not offer sufficient safety in the case of internal-combustion engines in vehicles. Fairly extensive jolts or shocks should be expected particularly in cross-country vehicles which may have the result that the spring clips spring out of the rubber parts. In this case, the air filter would then only be held by the connecting lines.
Furthermore, an intake air filter is known from German Utility Model DE-GM 18 07 288 which is combined with a noise damper. The filter housing is provided with a mount which consists exclusively of elastic preforms. Recesses are provided in the filter housing wall as well as in the mount supports. The elastic preforms are locked into these recesses.
Also in the case of this arrangement, there is the disadvantage that particularly strong jolts of shocks may rip the filter housing out of its anchoring and cause damage to the engine.
SUMMARY OF THE INVENTION
It is the object of the invention to provide an air filter which can be arranged elastically and reliably on a mounting flange and has a simple design.
This object is achieved by providing an air filter and intake duct for internal-combustion engines comprising a filter housing, an air filter insert arranged in the filter housing, and a connecting element between the air filter and the intake duct for attaching the air filter to the internal-combustion engine, wherein the connecting element is an elastic connecting element which has an essentially hollow-cylindrical shape; recesses are provided extending around the outer circumference of the connecting element, and a flange of the air filter extends into one of the circumferential recesses.
An important advantage of the invention is the fact that the elastic connecting element simultaneously assumes two functions. On the one hand, it decouples the vibrations which emanate from the internal-combustion engine and, on the other hand, it serves to reliably fasten the complete air filter housing and a seal on the clean-air-side. For this purpose, the elastic connecting element, which has an essentially hollow-cylindrical shape, is provided with circumferential recesses, whereby a flange of the air filter projects into at least one of the recesses. As a result of the recesses, the elasticity of the connecting element can be adjusted in a precise manner so that the connecting element can be provided with optimal damping properties.
According to one embodiment of the invention, the additional circumferential recesses are provided with a greater radial depth. This serves to improve the decoupling and achieves damping even in the case of very high vibration amplitudes.
According to a further embodiment, the attachment of the connecting element can be carried out by a snap connection. As an alternative, it is also possible to secure the connecting element with a screw flange. While the snap connection particularly simplifies the assembly, the connection via the screw flange has the advantage that a removal of the air filter is possible only by using appropriate tools.
These and other features of preferred embodiments of the invention, in addition to being described in the claims, are also indicated in the specification and the drawings, whereby the individual features may each be implemented alone or as a group in the form of subcombinations in the embodiments of the invention and in other fields and may r
REFERENCES:
patent: 4799470 (1989-01-01), Honda et al.
Filterwerk Mann & Hummel GmbH
Kamen Noah P.
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