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. 12, 2005
Filed:
May. 27, 2003
Harry Radel, Geesthacht, DE;
Harry Radel, Geesthacht, DE;
Dolmar GmbH, Hamburg, DE;
Abstract
In order to provide a four-stroke internal combustion engine () having a control chamber () and a cylinder (), provided with at least one intake valve () and at least one exhaust valve, which has a crankshaft chamber () formed by a crankcase (), in which a connecting rod () connected to the reciprocating piston () drives a mounted crankshaft (), having an ignition device and having a supply device () for an air-fuel mixture, which is connected on one side via a connection line () to the control chamber () and on the other side in the flow direction () of the air-fuel mixture to the piston chamber () via a throttle device () positioned in a mixture intake port () and via a mixture supply line (), which is connected via a non-return valve () to the crankshaft chamber (), and having an overflow channel () between the crankshaft chamber () and control chamber (), in which a camshaft () is positioned for controlling the intake and exhaust valves (), which allows reliable lubrication of all parts, particularly during idling, and stable idling operation simply and without regulatory outlay, it is suggested that the mixture supply line () may be closed if necessary during idling operation via an activatable switching valve ().