CAMSHAFT PHASER

摘要

A camshaft phaser, including: an inner rotor with radially outwardly extending vanes which is connected to the inner camshaft; a stator having radially inwardly directed projections which contact the outer surface of the rotor and form working spaces into which the vanes extend, the vanes divide the working spaces into first and second sets of pressure chambers which can be pressurized with a hydraulic medium in order to rotate the rotor in an advancing or retarding direction; a front cover connected to a front side of the assembly defining a front side of the pressure chambers; and a rear cover connected to the rear side of the assembly defining a rear side of the pressure chambers, having first and second protrusions directed toward and meshed with complementary first and second indentations on an outer camshaft.

主权项

1. A camshaft phaser assembly for a concentric camshaft that adjusts the relative rotational position of an inner camshaft relative to an outer camshaft and a crankshaft of an internal combustion engine, the phaser assembly comprising:
a rotor with radially outwardly extending vanes , the rotor arranged to connect to an inner camshaft; a stator having radially inwardly directed projections which contact a radially outer surface of the rotor and form working spaces into which the vanes extend, the vanes dividing the working spaces into first and second sets of pressure chambers which can be pressurized with a hydraulic medium in order to rotate the rotor in an advancing or retarding direction; a front cover connected to a front side of the stator defining a front side of the pressure chambers; and a rear cover connected to a rear side of the stator defining a rear side of the pressure chambers, the rear cover including:
a first protrusion with a first width extending in a first axial direction separated from a second protrusion with a second width extending in the first axial direction by a first circumferential distance; and,a third protrusion with a third width extending in the first axial direction separated from the second protrusion by a second circumferential distance;wherein:
the first, second and third protrusions are arranged to engage respective indentations on an outer camshaft; andthe first circumferential distance and the second circumferential distance are different.