Camshaft insert

Abstract

The invention relates to a camshaft insert for a camshaft, which can be, in particular, a composite camshaft. In this case, the camshaft insert bears an oscillating motor adjuster. An accumulator that can be loaded by means of a spring force is disposed inside camshaft insert. Alternatively, the accumulator can also be disposed in the camshaft.

1 . A camshaft insert for a camshaft, which is joined in a rotation-resistant manner to a rotor of an oscillating motor adjuster, wherein an accumulator that can be loaded by means of a spring force is disposed inside the camshaft insert. 
     
     
         2 . The camshaft insert according to patent  claim 1 , further comprising a hydraulic part of a valve disposed radially inside the rotor. 
     
     
         3 . The camshaft insert according to patent  claim 2 , wherein the hydraulic part is disposed flush relative to the accumulator. 
     
     
         4 . The camshaft insert according to  claim 2 , wherein the accumulator is separated from the hydraulic part by means of a wall, on which a first end of a screw-type pressure spring is supported, at least indirectly, a second end of the spring being supported on a valve piston. 
     
     
         5 . The camshaft insert according to patent  claim 4 , further comprising an electromagnetic actuator supported on one side of a valve piston and the second end of the screw-type pressure spring is supported on the other side of the valve piston, whereby fluid is introduced into the valve piston via a storage connection (S) coming from the accumulator, the fluid being able to be divided onto two work ports (A, B) alternately via two output edges by means of an overlap control, and the work ports leading into opposite-working pressure chambers on both sides of at least one blade of the rotor. 
     
     
         6 . The camshaft insert according to  claim 1 , wherein the accumulator has a pressurized space into which the fluid is introduced from a pressurized connection (P). 
     
     
         7 . The camshaft insert according to patent  claim 6 , wherein the accumulator is bounded by an axially movable hydraulic piston, which is supported thereon at an axial part attached to the camshaft on a side pointing toward pressurized space by means of a screw-type pressure spring. 
     
     
         8 . The camshaft insert according to patent  claim 7 , wherein the fluid is introduced into the accumulator from a channel to which is introduced the fluid from an annular groove, which is provided in a cylinder head part. 
     
     
         9 . The camshaft insert according to  claim 5 , wherein a tank connection (T 2 ) lies axially between a pressurized connection (P) leading into a pressurized space of the accumulator and the work ports (A, B). 
     
     
         10 . The camshaft insert according to  claim 1 , wherein:
 the camshaft comprises a hollow camshaft; and   the camshaft insert has an inner pin, which is pressed into the hollow camshaft.   
     
     
         11 . The camshaft insert according to patent  claim 10 , wherein the camshaft comprises a composite camshaft. 
     
     
         12 . The camshaft insert according to patent  claim 11 , wherein the camshaft insert and a threaded pin for fastening the rotor in a rotation-resistant manner on the camshaft are designed in one piece. 
     
     
         13 . The camshaft insert according to  claim 1 , wherein the camshaft insert has a threaded pin onto which is screwed a nut, which braces the rotor in a rotation-resistant manner against a shoulder of the camshaft insert. 
     
     
         14 . The camshaft insert according to  claim 1 , further comprising a non-return valve positioned in the hydraulic flow between an oil pump and the accumulator. 
     
     
         15 . A camshaft insert for a camshaft, which is joined in a rotation-resistant manner to a rotor of an oscillating motor adjuster, wherein an accumulator that can be loaded by means of a spring force is disposed in the camshaft. 
     
     
         16 . The camshaft insert according to patent  claim 15 , further comprising a hydraulic part of a valve disposed radially inside the rotor. 
     
     
         17 . The camshaft insert according to patent  claim 16 , wherein the hydraulic part is disposed flush relative to the accumulator. 
     
     
         18 . The camshaft insert according to  claim 16 , wherein the accumulator is separated from the hydraulic part by means of a wall, on which a first end of a screw-type pressure spring is supported, at least indirectly, a second end of the spring being supported on a valve piston. 
     
     
         19 . The camshaft insert according to patent  claim 18 , further comprising an electromagnetic actuator supported on one side of a valve piston and the second end of the screw-type pressure spring is supported on the other side of the valve piston, whereby fluid is introduced into the valve piston via a storage connection (S) coming from the accumulator, the fluid being able to be divided onto two work ports (A, B) alternately via two output edges by means of an overlap control, and the work ports leading into opposite-working pressure chambers on both sides of at least one blade of the rotor. 
     
     
         20 . The camshaft insert according to  claim 15 , wherein the accumulator has a pressurized space into which the fluid is introduced from a pressurized connection (P). 
     
     
         21 . The camshaft insert according to patent  claim 20 , wherein the accumulator is bounded by an axially movable hydraulic piston, which is supported thereon at an axial part attached to the camshaft on a side pointing toward pressurized space by means of a screw-type pressure spring. 
     
     
         22 . The camshaft insert according to patent  claim 21 , wherein the fluid is introduced into the accumulator from a channel to which is introduced the fluid from an annular groove, which is provided in a cylinder head part. 
     
     
         23 . The camshaft insert according to  claim 19 , wherein a tank connection (T 2 ) lies axially between a pressurized connection (P) leading into a pressurized space of the accumulator and the work ports (A, B). 
     
     
         24 . The camshaft insert according to  claim 15 , wherein:
 the camshaft is a hollow camshaft; and   the camshaft insert has an inner pin, which is pressed into the hollow camshaft.   
     
     
         25 . The camshaft insert according to patent  claim 24 , wherein the camshaft comprises a composite camshaft. 
     
     
         26 . The camshaft insert according to patent  claim 25 , wherein the camshaft insert and a threaded pin for fastening the rotor in a rotation-resistant manner on the camshaft are designed in one piece. 
     
     
         27 . The camshaft insert according to  claim 15 , wherein the camshaft insert has a threaded pin onto which is screwed a nut, which braces the rotor in a rotation-resistant manner against a shoulder of the camshaft insert. 
     
     
         28 . The camshaft insert according to  claim 15 , further comprising a non-return valve positioned in the hydraulic flow between an oil pump and the accumulator.