Half crank engine

Abstract

Various embodiments include a two-stroke engine having mist lubrication system, particularly for use with portable all attitude two-stroke engines using gaseous fuel, such as hydrogen, methane, liquid petroleum gas, pure propane, butane, and liquid fuel.

Accordingly, what is desired to be secured by Letters Patent of the United States is the invention as defined and differentiated in the following claims: 
     
         1 . An internal combustion engine comprising ( 350 ):
 a cylinder ( 2012 ) and a cylinder bore ( 14 );   a crankshaft ( 22 ) having a counter weight ( 21 );   an outboard shaft ( 222 );   a piston ( 2016 ) connected to the crankshaft ( 22 ) through a connecting rod ( 18 ) and a crankpin  20 ;   at least one transfer port ( 33 );   at least one intake port  84 ;   at least one exhaust port  50 ;   a crankcase chamber ( 26 ) intermittently connected to the combustion chamber ( 30 );   a combustion chamber ( 30 );   an oil sump ( 1250 ) attached to the engine ( 250 );   at least one exhaust port ( 50 );   at least one oil slinger ( 1234   b );   at least one oil line ( 803   b ′) connecting the oil sump ( 1250 ) to the crankcase chamber  26 ;   a crankcase wall  28   b;      an oil seal  1848  separating the oil sump  1250  and the starter cavity  1858 ;   an oil sump cover  28   c;      a starter reel  1850 ; and   a starter shaft  1823 .   
     
     
         2 . The oil sump cover  28   c  as claimed in  claim 1  has a starter cavity  1858 . 
     
     
         3 . The starter shaft  1823  as claimed in  claim 1  is integral to oil sump cover  28   c.    
     
     
         4 . The starter cavity  1858  as claimed in  claim 1  is adjacent to the oil sump  1250 . 
     
     
         5 . The oil sump cover  28   c  as claimed in  claim 1  has an oil refill cap  1250   d.    
     
     
         6 . An internal combustion engine comprising ( 250 ):
 a cylinder ( 2012 ) and a cylinder bore ( 14 );   a crankshaft ( 22 ) having a counter weight ( 21 );   an outboard shaft ( 222 );   a piston ( 2016 ) connected to the crankshaft ( 22 ) through a connecting rod ( 18 ) and a crankpin  20 ;   at least one transfer port ( 33 );   at least one intake port  84 ;   at least one exhaust port  50 ;   a crankcase chamber ( 26 ) intermittently connected to the combustion chamber ( 30 );   a combustion chamber ( 30 );   an oil sump ( 1250 ) attached to the engine ( 250 );   at least one exhaust port ( 50 );   gaseous fuel tank ( 850 )   at least one oil slinger ( 1234   b ); and   at least one oil tube ( 803   b ) connecting the oil reservoir ( 1250 ) to the crankcase chamber  26 ;