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. 25, 1989
Filed:
Mar. 23, 1988
Applicant:
Inventors:
Manfred Eisenmann, Wiesentheid, DE;
Hans Schreiber, Lappersdorf, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
123339 ; 123361 ; 123399 ;
Abstract
Device for controlling the intake air in an internal combustion engine. The control occurs via a throttle valve that is adjusted by a stepping motor and is directly secured on the shaft of the stepping motor thereof. The stepping motor is driven in fine step mode in order to be able to position the throttle value with great precision. In order to achieve a high speed of adjustment, a rough step mode is provided, whereby an extremely large, dynamic load angle can be respectively achieved during accelerating and decelerating independently of the operating parameters.