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:
Apr. 08, 1997
Filed:
Feb. 07, 1996
Assadollah Awarzamani, Markgroeningen, DE;
Thomas Wilfert, Ludwigsburg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
In known inlet valves, condensation of the fuel, which is precipitated in the form of a wall film, occurs at the inlet valve, in particular when the internal combustion engine is in the cold state. Relatively large fuel droplets, which cause an increase in the harmful components in the exhaust gas, can break away from the wall film. The inlet valve according to the invention has a hollow shaft into which compressed air flows via at least one inlet shaft opening, the compressed air then flowing out again from at least one outlet opening which is provided on one side of the inlet valve facing away from the combustion space of the internal combustion engine. As a result of the outflowing compressed air, an air film is produced around the valve head, which air film prevents condensation of the fuel. The inlet valve is provided in particular for mixture-compressing, spark ignition internal combustion engines.