Oil supply system

Abstract

An oil supply system for an internal combustion engine, comprising a lubricating oil circuit in which a first oil pressure generating device, a first device for oil temperature control, and a second device for oil temperature control are provided, wherein the two devices for oil temperature control are arranged in two arms of the lubricating oil circuit connected in parallel and wherein the first oil pressure generating device is arranged in the flow direction upstream of the branch to the two arms leading to the two devices for oil temperature control.

1 - 20 . (canceled) 
     
     
         21 . An oil supply system for an internal combustion engine, comprising a lubricating oil circuit in which
 a first oil pressure generating device,   a first device for oil temperature control, and   a second device for oil temperature control are provided,   
       wherein the two devices for oil temperature control are arranged in two arms of the lubricating oil circuit connected in parallel and wherein the first oil pressure generating device is arranged in the flow direction upstream of the branch to the two arms leading to the two devices for oil temperature control. 
     
     
         22 . An oil supply system according to  claim 21 , further comprising a second oil pressure generating device which is arranged in the flow direction downstream of the first device for oil temperature control and is arranged in the first arm of the first device for oil temperature control. 
     
     
         23 . An oil supply system according to  claim 21 , further comprising an oil filter in the flow direction upstream of the first oil pressure generating device. 
     
     
         24 . An oil supply system according to  claim 21 , further comprising an oil filter in the first arm of the lubricating oil circuit, wherein the oil filter in the first arm of the lubricating oil circuit is downstream of the second oil pressure generating device. 
     
     
         25 . An oil supply system according  claim 21 , further comprising an oil filter in the second arm of the lubricating oil circuit. 
     
     
         26 . An oil supply system according  claim 22 , wherein the first oil pressure generating device can be driven mechanically by the internal combustion engine via a transmission and is coupled to the rotational speed of the internal combustion engine, wherein the second oil pressure generating device is driven by a speed-controlled electric motor. 
     
     
         27 . An oil supply system according  claim 22 , further comprising a control unit by way of which the pressure at the inlet into the oil lines of the lubricating oil circuit can be adapted to the operating conditions of the internal combustion engine, wherein the rotational speed of the second oil pressure generating device is regulated. 
     
     
         28 . An oil supply system according to  claim 23 , wherein upstream of the first oil pressure generating device, an oil filter is arranged in the first arm and in the second arm, respectively, each oil filter having a different filter fineness or mesh size, wherein said mesh sizes differ from each other by, in each case, at least 100%, based on the mesh size of the other oil filter. 
     
     
         29 . An oil supply system according to  claim 21 , wherein with the first oil pressure generating device is operable to generate an oil pressure of between 0.6 and 1.6 bar in the operating state. 
     
     
         30 . An oil supply system according to  claim 22 , wherein at the second oil pressure generating device, the oil pressure at the inlet into the supply line for the lubrication points and into the cooling oil nozzles of the internal combustion engine can be regulated depending on the engine load, wherein the pressure at a maximum engine power is by at least 20% higher than at half load. 
     
     
         31 . An oil supply system according to  claim 21 , wherein the temperature of the first device for oil temperature control is adaptable to the motor requirements. 
     
     
         32 . An oil supply system according to  claim 21 , wherein the temperature of the first device for oil temperature control involves a multi-stage heat exchanger, which is incorporated into the cooling circuit for the engine cooling water or into a further cooling circuit and which comprises an electrical heating device. 
     
     
         33 . An oil supply system according to  claim 23 , wherein the oil filter exhibits the smallest mesh size and the highest filter fineness of all oil filters in the first arm downstream of the first oil pressure generating device. 
     
     
         34 . An oil supply system according to  claim 21 , wherein the second device for oil temperature control in the second arm is adjustable to a temperature between 70 and 80° C. during the operation of the engine. 
     
     
         35 . An oil supply system according to  claim 23 , wherein in the second arm, an oil filter is provided the mesh size of which is larger by at least 100% or, respectively, the filter fineness of which is correspondingly lower than for the oil filter in the first arm. 
     
     
         36 . An oil supply system according to  claim 23 , wherein viewed in the flow direction upstream of the first oil pressure generating device, an oil filter is arranged the mesh size of which is larger by at least 100% or, respectively, the filter fineness of which is lower to this extent than that of the oil filter in the second arm. 
     
     
         37 . An internal combustion engine comprising an oil supply system according to  claim 21 . 
     
     
         38 . An internal combustion engine according to  claim 37 , wherein the oil temperature in the pressure line of the internal combustion engine can be adjusted as a function of the engine load, wherein the oil temperature at a maximum engine power is by at least 10° C. lower than at half load. 
     
     
         39 . An internal combustion engine according to  claim 37 , wherein the first arm supplies the oil lines of the internal combustion engine with finely filtered engine oil, whereas the second arm is responsible for the temperature control of the engine oil in the crankcase and, if present, in external oil reservoir containers, which, however, are incorporated into the engine oil circuit, as well as for the pre- or, respectively, side stream filtration of the engine oil. 
     
     
         40 . A cogeneration plant comprising an internal combustion engine according to  claim 39 .