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:
Jun. 05, 2001
Filed:
Jun. 23, 2000
Ulf Lundqvist, Stockholm, SE;
Scania CV Aktiebolag (publ), , SE;
Abstract
A cylinder head for a combustion engine of diesel type has an inlet duct (,) of so-called tangential type whose mouth leading into the combustion chamber (,) is controlled by a conventional mushroom valve (,). The valve cooperates with a valve seat (,) formed in a valve seat ring (,) which is arranged in a milled recess (,) which surrounds the mouth of the inlet duct (,). At a shoulder surface (,) formed by the milled recess (,) the valve seat ring (,) connects to the inlet duct (,) at a larger diameter than that exhibited by the inlet duct at the shoulder surface. The valve seat ring (,) further has, on its side facing radially inwards, an arcuate shape (,) on at least part of the valve seat ring (,) which defines the latter's throughflow area. This makes it possible for the inlet air leaving the inlet duct not to be subject to substantial disturbances of flow even if there is a certain lack of concentricity at the connection between the inlet duct (,) and the valve seat ring (,).