Internal combustion engine with cylinder head

Patent metadata

Field	Value
Publication number	US-10337449-B2
Application number	US-201715853520-A
Country	US
Kind code	B2
Filing date	Dec 22, 2017
Priority date	Jan 2, 2017
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

Systems are provided for exhaust gas passages in integrated and conventional exhaust manifolds. In one example, a system may include an exhaust gas passage that has a cross section which features curved limb shapes. This passage may also feature other shapes of cross sections at other points along the passage.

First claim

The invention claimed is:

1. An engine comprising a cylinder head and a cylinder:
the cylinder having an outlet opening, the outlet opening being connected to an exhaust passage;
the exhaust passage having a cross section which changes in a flow direction; and
a bend in the exhaust passage having a cross section with a delimiting edge forming two limbs extending from a central portion comprising a depression.

2. The engine of claim 1 , wherein the cross section of the bend has a rounded corner.

3. The engine of claim 2 , wherein a portion of the exhaust passage includes a curvature.

4. The engine of claim 3 , wherein a portion of the cross section of the bend includes an undulating shape.

5. The engine of claim 4 , wherein the two limbs which are connected to one another by an interposed central limb.

6. The engine of claim 5 , wherein a third limb branches off from the central limb and the third limb is arranged between the two limbs.

7. The engine of claim 6 , wherein the third limb is shorter than each of the two lateral limbs.

8. The engine of claim 5 , wherein an edge of the cross section includes the depression.

9. The engine of claim 3 , wherein the cross section of the bend is arranged within the cylinder head.

10. The engine of claim 9 , having at least two exhaust passages, wherein the at least two exhaust passages merge to form an overall exhaust passage within the cylinder head.

11. The engine of claim 3 , wherein an exhaust-gas turbocharger is provided which comprises at least a turbine connected to the exhaust passage.

12. The engine of claim 3 , wherein a shape of the cross section of the bend rotates an angle with respect to a longitudinal axis of the exhaust passage.

13. An engine comprising:
a cylinder;
a cylinder head including an exhaust passage;
the exhaust passage having a bend that changes direction relative to a longitudinal axis of a piston and an axis perpendicular to the longitudinal axis; and
the bend having a cross sectional shape including a depression which extends radially inward creating two limbs that extend radially outward.

14. The engine of claim 13 , including further cylinders, cylinder heads, and exhaust passages.

15. The engine of claim 14 , wherein the exhaust passages' cross sectional shape rotates relative to the longitudinal axis of the exhaust passage.

16. The engine of claim 15 , wherein the exhaust passage has multiple bends.

17. The engine of claim 13 , wherein the cross section has a trapezoidal shape outline at a location.

18. An engine comprising:
a cylinder and a cylinder head;
the cylinder head including integrated exhaust passages and each exhaust passage merging with an exhaust passage of another cylinder within the cylinder head;
each exhaust passage changing direction relative to a longitudinal axis of a piston, an axis perpendicular to the longitudinal axis and extending through a cylinder bank, and an axis perpendicular to the other two axes; and
each exhaust passage having an asymmetrical cross section which changes continuously as it extends for greater than half a length of the exhaust passage and the changes occur via one or more depressions.

19. The engine of claim 18 , wherein multiple exhaust passages merge to form a lesser number of passages.

20. The engine of claim 19 , wherein the cross section rotates an angle relative to the longitudinal axis of the exhaust passage as the exhaust passage extends away from the cylinder.

Assignees

• Ford Global Tech Llc

Inventors

• Hopf Anselm
• Bartsch Guenter
• Quiring Stefan
• Huth Florian

Classifications

• F02F1/42

  Shape or arrangement of intake or exhaust channels in cylinder heads · CPC title

• F02F1/243 Primary

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

• F02F1/4264 Primary

  of exhaust channels · CPC title