Oil supply device for a vacuum pump of an internal combustion engine

Abstract

An oil supply device for a vacuum pump of an internal combustion engine, in particular of a car, including an oil feed line via which the vacuum pump can be supplied with oil for lubricating the vacuum pump. The oil feed line includes a valve connected to the oil feed line in an oil-conducting manner, which valve has a piston that is accommodated in a valve interior of the valve and can move at least between a supply position in which it allows a supply of oil to the vacuum pump and a blocking position in which it prevents the supply of oil to the vacuum pump, and has a spring element, by means of which a spring force that holds the piston in the blocking position can be applied to the piston when the internal combustion engine is at rest.

1 . Oil supply device for a vacuum pump of an internal combustion engine, in particular of a car, comprising:
 an oil feed line via which the vacuum pump can be supplied with oil for lubricating the vacuum pump, wherein the oil feed line comprises a valve connected to the oil feed line in an oil-conducting manner, the valve has a piston that is accommodated in a valve interior of the valve and can move at least between a supply position in which it allows a supply of oil to the vacuum pump and a blocking position in which it prevents the supply of oil to the vacuum pump, and has a spring element, by means of which a spring force that holds the piston in the blocking position can be applied to the piston when the internal combustion engine is at rest.   
     
     
         2 . Oil supply device according to  claim 1 , wherein the piston can be displaced from the blocking position into the supply position counter to the spring force by means of an oil pressure of the oil that is applied to the piston during operation of the internal combustion engine. 
     
     
         3 . Oil supply device according to  claim 1 , wherein the valve has a ventilation aperture via which air can be exchanged between the valve interior and the surroundings of the valve when the piston moves between the blocking position and the supply position.