US2007186893A1PendingUtilityA1

Filterless crankcase lubrication system for a vehicle

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Assignee: AFTON CHEMICAL CORPPriority: May 21, 2004Filed: Apr 20, 2007Published: Aug 16, 2007
Est. expiryMay 21, 2024(expired)· nominal 20-yr term from priority
Inventors:David VenhausRobert ShamaJames HorvathDewey P. SzemenyeiRichard RohfritchDanny Pridemore
C10N 2040/252C10N 2060/09C10M 149/06C10M 2215/30C10N 2020/04C10N 2040/255C10M 133/56C10M 149/10C10M 2205/022F01M 1/10C10M 2215/28C10M 133/58
44
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Claims

Abstract

A crankcase lubricating system and method for lubricating an engine of a motor vehicle. The crankcase lubricating system includes filterless lubricant circulation system, and a crankcase lubricant containing a fully formulated lubricating base oil meeting or exceeding ILSAC GF-4 or API CI-4 minimum performance standards for engine oils.

Claims

exact text as granted — not AI-modified
1 . A crankcase lubricating system for a motor vehicle comprising, a filterless lubricant circulation system, and a crankcase lubricant containing a fully formulated lubricating oil meeting or exceeding ILSAC GF-4 or API CI-4 minimum performance standards for engine oils.  
   
   
       2 . The lubricating system of  claim 1  wherein the crankcase lubricant includes a nitrogen containing olefin copolymer derived from a copolymer having grafted thereon from about 0.15 to about 1.0 carboxylic groups per 1000 number average molecular weight units of the copolymer, wherein the olefin copolymer has a number average molecular weight ranging from about 20,000 to about 100,000.  
   
   
       3 . The lubricating system of  claim 1 , further comprising a lubricant circulation pump.  
   
   
       4 . The lubricating system of  claim 1 , wherein the lubricating system comprises an automobile lubricating system.  
   
   
       5 . The lubricating system of  claim 1 , wherein the lubricating system comprises a tractor-trailer lubricating system.  
   
   
       6 . The lubricating system of  claim 1 , wherein the lubricating system comprises a crankcase lubricating system for a spark-ignition engine.  
   
   
       7 . The lubricating system of  claim 1 , wherein the lubricating system comprises a crankcase lubricating system for a compression-ignition engine.  
   
   
       8 . A motor vehicle comprising the lubricating system of  claim 1 .  
   
   
       9 . An automobile comprising the lubricating system of  claim 1 .  
   
   
       10 . A tractor-trailer rig comprising the lubricating system of  claim 1 .  
   
   
       11 . A method of lubricating moving parts of a fuel combustion engine having separate fuel and lubricant systems, the method comprising the steps of: 
 providing a crankcase lubricating system containing a lubricant circulation device, wherein the crankcase lubricating system is devoid of a lubricant filter; and    circulating in the crankcase lubricating system a lubricant meeting or exceeding ILSAC GF-4 or API CI-4 standards for engine oils.    
   
   
       12 . The method of  claim 11 , wherein the lubricant contains a lubricating base oil and a lubricant additive, the lubricant additive including a nitrogen containing olefin copolymer having grafted thereon from about 0.15 to about 1.0 carboxylic groups per 1000 number average molecular weight units of the copolymer, wherein the copolymer has a number average molecular weight ranging from about 20,000 to about 100,000.  
   
   
       13 . The method of  claim 11 , wherein the fuel combustion engine comprises a spark-ignition engine of a passenger automobile.  
   
   
       14 . The method of  claim 11 , wherein the fuel combustion engine comprises a compression-ignition engine of a passenger automobile.  
   
   
       15 . The method of  claim 11 , wherein the fuel combustion engine comprises a compression-ignition engine of a tractor-trailer rig.  
   
   
       16 . A method for reducing maintenance costs for a motor vehicle comprising providing an engine and a crankcase lubricating system for the engine, removing an oil filter from an oil filter location for the crankcase lubricating system, attaching a substantially permanent bypass device to the oil filer location, and circulating, in the crankcase lubricating system, a lubricant meeting or exceeding ILSAC GF-4 or API CI-4 minimum performance standards for engine oils.  
   
   
       17 . The method of  claim 16 , wherein the lubricant contains a lubricating base oil and a lubricant additive, the lubricant additive including a nitrogen containing olefin copolymer having grafted thereon from about 0.15 to about 1.0 carboxylic groups per 1000 number average molecular weight units of the copolymer, wherein the copolymer has a number average molecular weight ranging from about 20,000 to about 100,000.  
   
   
       18 . The method of  claim 16 , wherein the motor vehicle comprises a passenger automobile containing a spark-ignition engine.  
   
   
       19 . The method of  claim 16 , wherein the motor vehicle comprises a passenger automobile containing a compression-ignition engine.  
   
   
       20 . The method of  claim 16 , wherein the motor vehicle comprises a tractor-trailer rig containing a compression-ignition engine.  
   
   
       21 . A crankcase lubricating system for a motor vehicle comprising, a lubricant circulation system having an absence of a filtering means for the lubricant, optionally, a lubricant circulation pump, and a crankcase lubricant containing a fully formulated lubricating base oil meeting or exceeding ILSAC GF-4 or API CI-4 minimum performance standards for engine oils.  
   
   
       22 . The lubricating system of  claim 21  wherein the crankcase lubricant includes a nitrogen containing olefin copolymer having grafted thereon from about 0.15 to about 1.0 carboxylic groups per 1000 number average molecular weight units of the copolymer, wherein the olefin copolymer has a number average molecular weight ranging from about 20,000 to about 100,000.  
   
   
       23 . The lubricating system of  claim 21 , wherein the lubricating system comprises an automobile lubricating system.  
   
   
       24 . The lubricating system of  claim 21 , wherein the lubricating system comprises a tractor-trailer lubricating system.  
   
   
       25 . The lubricating system of  claim 21 , wherein the lubricating system comprises a crankcase lubricating system for a spark-ignition engine.  
   
   
       26 . The lubricating system of  claim 21 , wherein the lubricating system comprises a crankcase lubricating system for a compression-ignition engine.  
   
   
       27 . A motor vehicle comprising the lubricating system of  claim 21 .  
   
   
       28 . An automobile comprising the lubricating system of  claim 21 .  
   
   
       29 . A tractor-trailer rig comprising the lubricating system of  claim 21 .  
   
   
       30 . A crankcase lubricating system for a motor vehicle comprising, a lubricant circulation system having an absence of an externally removable filtering means for the lubricant, optionally, a lubricant circulation pump, and a crankcase lubricant containing a fully formulated lubricating base oil meeting or exceeding ILSAC GF-4 or API CI-4 minimum performance standards for engine oils.  
   
   
       31 . The lubricating system of  claim 30  wherein the crankcase lubricant includes a nitrogen containing olefin copolymer having grafted thereon from about 0.15 to about 1.0 carboxylic groups per 1000 number average molecular weight units of the copolymer, wherein the olefin copolymer has a number average molecular weight ranging from about 20,000 to about 100,000.  
   
   
       32 . The lubricating system of  claim 30 , wherein the lubricating system comprises an automobile lubricating system.  
   
   
       33 . The lubricating system of  claim 30 , wherein the lubricating system comprises a tractor-trailer lubricating system.  
   
   
       34 . The lubricating system of  claim 30 , wherein the lubricating system comprises a crankcase lubricating system for a spark-ignition engine.  
   
   
       35 . The lubricating system of  claim 30 , wherein the lubricating system comprises a crankcase lubricating system for a compression-ignition engine.  
   
   
       36 . A motor vehicle comprising the lubricating system of  claim 30 .  
   
   
       37 . An automobile comprising the lubricating system of  claim 30 .  
   
   
       38 . A tractor-trailer rig comprising the lubricating system of  claim 30 .  
   
   
       39 . A method of operating a filterless motor vehicle having a fuel combustion engine and a crankcase comprising the steps of: 
 providing a crankcase lubricating system for the fuel combustion engine of the motor vehicle, the crankcase lubricating system containing a lubricant circulation device, wherein the crankcase lubricating system is devoid of a lubricant filter; and    circulating in the crankcase lubricating system a lubricant meeting or exceeding ILSAC GF-4 or API CI-4 standards for engine oils.    
   
   
       40 . The method of  claim 39 , wherein the lubricant contains a lubricating base oil and a lubricant additive, the lubricant additive including a nitrogen containing olefin copolymer having grafted thereon from about 0.15 to about 1.0 carboxylic groups per 1000 number average molecular weight units of the copolymer, wherein the copolymer has a number average molecular weight ranging from about 20,000 to about 100,000.  
   
   
       41 . The method of  claim 40 , wherein the fuel combustion engine comprises a spark-ignition engine.  
   
   
       44 . The method of  claim 40 , wherein the fuel combustion engine comprises a compression-ignition engine.  
   
   
       45 . The method of  claim 40  wherein the lubricant filter comprises an externally removable lubricant filter.  
   
   
       46 . The method of  claim 40  wherein the lubricant filter comprises an internal lubricant filter.

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