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:
Jul. 31, 2007
Filed:
Apr. 14, 2004
Jochen Müller, Sankt Augustin, DE;
Bernd Kircher, Niederzier, DE;
Markus Duesmann, Stuttgart, DE;
Enno Lohse, Stolberg, DE;
Jochen Müller, Sankt Augustin, DE;
Bernd Kircher, Niederzier, DE;
Markus Duesmann, Stuttgart, DE;
Enno Lohse, Stolberg, DE;
FEV Motorentechnik, GmbH, Aachen, DE;
Abstract
The invention relates to the internal exhaust-gas recirculation in an internal combustion engine with gas exchange valves periodically controlled by a camshaft () in accordance with the four-stroke principle, in which, during the gas exchange exhausting of exhaust gas from the respective cylinder () into the exhaust duct (), an intake valve () associated with the respective cylinder () is open in a crank angle range after top dead center of the ignition of the gas mixture present in the cylinder (), in order to exhaust part of the exhaust gas into an intake duct (), so that during the next gas exchange intake both fresh gas and exhaust gas are taken in from the intake duct (), the respective intake valve () being actuated during the gas exchange exhausting independently of the periodic gas exchange intake, and the additional opening of the respective intake valve () being carried out in the range from 110 to 150% of the opening angle of the start of opening of the exhaust duct () by the exhaust valve ().