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:
Dec. 22, 1981
Filed:
Feb. 29, 1980
Wolf Wessel, Oberriexingen, DE;
Ludwig Walz, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An apparatus is proposed which serves to control the ratio of air to fuel quantity of the operational mixture to be introduced into the combustion chambers of an internal combustion engine. The actual fuel quantity supplied via an injection apparatus (2) and the actual air quantity supplied via the intake manifold of the engine are measured and processed in a control apparatus (21) into a correction adjusting variable. The apparatus further functions with exhaust recirculation, with the aspirated fresh air quantity being dosed and the remnant filling of the gaseous filling introduced into the combustion chambers of the engine is replaced by recirculated exhaust gas. For the purpose of dosing the fresh air, a symmetrical throttle valve (14) is disposed in the intake manifold, whose position is transferred by means of pneumatic servomotor (23) to a second throttle device (12, 32), by means of which finally the quantity of the recirculated exhaust gas is determined.