The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 28, 1990
Filed:
Feb. 03, 1989
Hans Gebhardt, Langenzenn, DE;
MAN Nutzfahrzeuge GmbH, Munchen, DE;
Abstract
A gear wheel driven air compressor that is constructed as a piston compressor, the drive gear wheel of which, on the air compressor crankshaft, meshes with a gear wheel on the camshaft of the internal combustion engine. With drives of this type, the negative torque of the air compressor, which is produced once the upper dead center position of the air compressor piston has been reached, leads to a sudden flank change in the tooth mesh, which is associated with an unpleasant noise. In order to reduce this noise, it is known to make the meshing flank clearance as small as possible. However, clearances which are too small lead to increased rotational bending strain on the air compressor crankshaft and the camshaft. In order to prevent this, a sinusoidal meshing flank clearance change is proposed, which is obtained via a specific eccentricity of the air compressor drive gear wheel, which is associated with the upper dead center position of the air compressor piston.