Cylinder head housing, method for producing a cylinder head housing, and casting core

Patent metadata

Field	Value
Publication number	US-11078865-B2
Application number	US-201916664320-A
Country	US
Kind code	B2
Filing date	Oct 25, 2019
Priority date	Apr 28, 2017
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

A cylinder head housing for a combustion unit, which forms at least two cylinders arranged in-line, having receiving openings for one outlet valve each, which are assigned to the individual cylinders of the combustion unit, comprising exhaust gas channels, which extend from these outlet valve receiving openings and are merged into an exhaust gas outlet channel, and cooling channels having a roof distribution channel which is connected to an injector cooling channel provided for an arrangement above a cylinder and/or having a manifold distribution channel, which extends along the row of outlet valve receiving openings, the manifold distribution channel being connected to a plurality of manifold network channels running along the exhaust gas channels, which are directly or indirectly connected to a manifold collection channel, which extends along the row of outlet valve receiving openings.

First claim

What is claimed is:

1. A cylinder head housing for a combustion unit, which forms at least two cylinders arranged in-line, comprising:
receiving openings for one outlet valve each, which are assigned to the individual cylinders of the combustion unit;
exhaust gas channels that extend from the outlet valve receiving openings and are merged into an exhaust gas outlet channel; and
a roof distribution channel for delivering coolant that is connected to injector cooling channels arranged above each of the at least two cylinders, the injector cooling channels being connected to roof network channels which extend in different radial directions with respect to a longitudinal axis of the particular injector cooling channel and which are directly or indirectly connected to at least two roof collection channels, the at least two roof collection channels being arranged on different sides with respect to a row defined by the injector cooling channels, the roof distribution channel and the at least two roof collection channels extending across the at least two cylinders; and/or
a manifold distribution channel, which extends along parallel to the row of outlet valve receiving openings, the manifold distribution channel being directly or indirectly connected to a plurality of manifold network channels running along the exhaust gas channels, which are directly or indirectly connected to a manifold collection channel, which extends along parallel to the row of outlet valve receiving openings.

2. The cylinder head housing according to claim 1 , further comprising receiving openings for one fuel injector or one spark plug each, which are assigned to the individual cylinders of the combustion unit, the injector cooling channels annularly surrounding the injector receiving openings.

3. The cylinder head housing according to claim 1 , wherein the average flow cross section of the roof network channels is smaller than the average flow cross section of the roof distribution channel, the injector cooling channels and the roof collection channels, and/or the smallest flow cross section of the roof network channels is smaller than the smallest flow cross section of the roof distribution channel, the injector cooling channels and the roof collection channels; and/or wherein the average flow cross section of the manifold network channels is smaller than the average flow cross section of both the manifold distribution channel and the manifold collection channel, and/or the smallest flow cross section of the manifold network channels is smaller than the smallest flow cross section of both the manifold distribution channel and the manifold collection channel.

4. The cylinder head housing according to claim 1 , wherein the roof network channels extending out of the individual injector cooling channels transition into one or multiple roof ring channels, which at least partially encircle the longitudinal axis of the particular injector cooling channel and which open into the roof collection channels.

5. The cylinder head housing according to claim 1 , wherein the manifold network channels are at least partially connected to one or multiple manifold ring channels, which at least partially encircle one or multiple of the exhaust gas channels and which are connected to the manifold distribution channel.

6. The cylinder head housing according to claim 1 , wherein the manifold distribution channel and the manifold collection channel are disposed on different sides with respect to a row formed by the exhaust gas channels.

7. The cylinder head housing according to claim 1 , wherein a longitudinally axial end of the roof distribution channel transitions into a roof inflow channel or roof outflow channel, and/or a longitudinally axial end of the roof collection channels each transition into a roof outflow channel or roof inflow channel.

8. The cylinder head housing according to claim 1 , wherein a manifold inflow channel transitions into the manifold distribution channel in a section of the manifold distribution channel abutting the exhaust gas outlet channel, and/or a manifold outflow channel extends out of the manifold collection channel.

9. The cylinder head housing according to claim 1 , further comprising an exhaust gas outlet cooling channel, which connects the manifold distribution channel and the manifold collection channel and which encircles the exhaust gas outlet channel.

10. The cylinder head housing according to claim 1 , wherein the roof distribution channel and/or the roof collection channels and/or the manifold distribution channel and/or the manifold collection channel is/are guided along the entire row of exhaust gas channels.

11. A method for manufacturing a cylinder head housing according to claim 1 , characterized by the formation via a generative manufacturing method or by casting, using an expendable casting core which forms at least the cooling channels.

12. The method according to claim 11 , wherein a soluble base material forms the casting core.

13. A casting core for the method according to claim 11 , comprising casting core sections, which are configured as a negative mold of the cooling channels of a cylinder housing.

14. The cylinder head housing according to claim 1 , wherein the manifold network channels are physical channels that extend toward cylinder heads of the at least two cylinders and extend substantially perpendicularly from the manifold distribution channel.

15. The cylinder head housing according to claim 1 , wherein the roof network channels transition into a roof ring channel that encircles a particular injector receiving opening at each of the at least two cylinders.

16. A cylinder head housing for a combustion unit, which forms at least two cylinders arranged in-line, comprising:
receiving openings for one outlet valve each, which are assigned to the individual cylinders of the combustion unit;
exhaust gas channels that extend from the outlet valve receiving openings and are merged into an exhaust gas outlet channel;
a roof distribution channel connected to at least two injector cooling channels, each of the at least two injector cooling channels being arranged above one of the at least two cylinders, the injector cooling channels being connected to roof network channels which extend in different radial directions with respect to a longitudinal axis of the particular injector cooling channel and which are directly or indirectly connected to at least two roof collection channels, the at least two roof collection channels being arranged on different sides with respect to the row defined by the injector cooling channels;
receiving openings for one fuel injector or one spark plug each, which are assigned to the individual cylinders of the combustion unit, the injector cooling channels annularly surrounding the injector receiving openings; and
a manifold distribution channel, which extends along the row of outlet valve receiving openings, the manifold distribution channel being directly or indirectly connected to a plurality of manifold network channels running along the exhaust gas channels, which are directly or indirectly connected to a manifold collection channel, which extends along the row of outlet valve receiving openings.

Assignees

• Volkswagen Ag

Inventors

• Urzua Torres Paulo
• Henn Michael
• Bier Martin
• Rudloff Madlen

Classifications

• F02F1/40 Primary

  cylinder heads with means for directing, guiding, or distributing liquid stream · CPC title

• F02F1/243

  Cylinder heads and inlet or exhaust manifolds integrally cast together · CPC title

• F02F2200/08

  using a lost model, e.g. foam casting · CPC title

• F02F1/38

  the cylinder heads being of overhead valve type · CPC title

• F02F1/242

  Arrangement of spark plugs or injectors · CPC title