Cylinder head of an internal combustion engine

Abstract

The invention relates to a cylinder head (1) of an internal combustion engine with a camshaft bearing mechanism (2) situated thereon in which a hollow camshaft (3) is rotatably mounted, forming an outlet for discharging blow-by gases laden with oil droplets out of the crankcase and is designed as an oil droplet separator for separating the oil content out of these gases. The camshaft (3) passes through a valve space (11). A rocker cover (13) or a multichannel device (27) is connected axially to at least one end of the camshaft (3), forming an axial gap (9), each having a channel (10) connected coaxially to the hollow space (5) of the camshaft (3) so that blow-by gases from which the oil has been removed can be discharged from the camshaft (3), and each being designed so that they either form an oil collecting space (12) that is sealed with respect to the valve space (11) or they introduce oil that has been separated into such an oil collecting space (12).

Description

Advantageous exemplary embodiments that are explained in greater detail below are depicted schematically in each of the drawings.

The drawings show in schematic diagrams:

FIG. 1 a longitudinal section through a cylinder head in the area of an axial end area of a camshaft,

FIG. 2 a diagram like that in FIG. 1 but with another embodiment of a rocker cover,

FIG. 3 a diagram like that in FIG. 2 but with another camshaft and another rocker cover,

FIG. 4 a detailed view of an axial camshaft end with a multichannel device.

Claims

1. A cylinder head (1) of an internal combustion engine, comprising a camshaft bearing mechanism (2) arranged on the cylinder head (1),a hollow camshaft (3) that is rotatably mounted in the camshaft bearing mechanism (2) and forms an outlet for blow-by gases laden with oil droplets out of the crankcase and is designed as an oil droplet separator for separation of the oil content out of these gases,whereby the camshaft (3) passes through a valve space (11) containing the camshaft bearing mechanism (2),whereby a rocker cover (13) or a multichannel device (27) is connected axially at at least one end to the camshaft (3) forming an axial gap (9), each having a channel (10) connected coaxially to the hollow space (5) of the camshaft (3) through which blow-by gases from which the oil has been removed can be discharged from the camshaft (3),whereby the rocker cover (13) or the multichannel device (27) is designed so that it either forms an oil collecting space (12) that is sealed with respect to the valve space (11) or it introduces separated oil into such an oil collecting space (12).

2. The cylinder head according to claim 1, comprising the features the oil separation space (12) has an oil sump (14) situated in the cylinder head (1),the oil sump (14) has a drain valve (15) and/or a drain barrier.

3. The cylinder head according to claim 1, wherein the axial gap (9) between the camshaft (3) and the rocker cover (13) is designed so that during operation of the internal combustion engine, oil separated in the camshaft (3) designed as an oil separator can escape into the oil separation space (12).

4. The cylinder head according to claim 1, wherein the rocker cover (13) is in sealing contact with the cylinder head at one end and with the camshaft (3) or the camshaft bearing mechanism (2) at the other end.

5. The cylinder head according to claim 1, wherein the camshaft (3) has an adjusting device (19) for aligning the camshaft (3), arranged in the oil separation space (12) or in the valve space (11).

6. The cylinder head according to claim 1, wherein a seal (18) which is in contact with the camshaft (3) and seals the valve space (11) with respect to the oil separation space (12) is provided on the rocker cover (13).

7. The cylinder head according to claim 1, wherein the rocker cover (13) is made of plastic and has a metallic insert (23) in the area of the seal (18).

8. The cylinder head according to claim 1, wherein the multichannel device (27) is in sealing contact with the camshaft (3) at one end.

9. The cylinder head according to claim 1, wherein the multichannel device (27) has an inlet channel that is connected to the hollow space (5) of the camshaft (3) and has an outlet channel through which blow-by gases from which the oil has been removed are discharged and has an oil return channel (29) that is connected to or forms the oil sump (14).

10. The cylinder head according to claim 9, wherein the multichannel device (27) comprises an immersion pipe (28) which forms the outlet channel, whereby the immersion pipe (28) is connected at one end to the multichannel device (27) and at the other end to the rocker cover (13).