Patent ID: 7073482
Filing Date: 2006-07-11
Classification: F01M,F02B

Abstract:
1. A four-stroke internal combustion engine with at least one cylinder ( 9 ), a crankcase ( 3 ) which forms a crankcase pump and is connected via a valve ( 15 , 18 ) each to an air manifold ( 16 ) for fresh air on the one hand and to an intake manifold ( 17 ) connecting the crankcase ( 3 ) with an intake port ( 11 ) of the cylinder ( 9 ) on the other hand, and with a reservoir ( 25 ) for lubricating oil arranged on a conveying device ( 26 ) for lubricating oil, with an oil circulation comprising the crankcase ( 3 ) as well as an oil separator ( 19 ) provided in the intake manifold ( 17 ) and with a device ( 23 ) for injecting fuel into the intake manifold ( 17 ) or into the combustion chamber ( 29 ) of the cylinder ( 9 ), characterized in that the conveying device ( 26 ) connected to the reservoir ( 25 ) comprises a duct ( 27 ) for injecting lubricating oil into the crankcase ( 3 ) and that the intake manifold leads to the oil separator ( 19 ) by circumventing the reservoir ( 25 ).