Engine cylinder head assembly

• US 20020117143A1
• Filed: 02/24/2001
• Published: 08/29/2002
• Est. Priority Date: 02/24/2001
• Status: Active Grant

• Current Assignee: Briggs & Stratton LLC (Briggs & Stratton Corporation)
• Original Assignee: Briggs & Stratton Corporation
• Inventors: Gracyalny, Gary J.
• Granted Patent: US 6,460,502 B2
• Time in Patent Office: Days
• US Class Current: 123/193.5
• CPC Class Codes: F02F 1/24 Cylinder heads

Abstract

A cylinder head assembly having a cylinder head and an adapter. The intake cavity of the cylinder head is relatively large, and the adapter fills a portion of the space in the cavity. The cylinder head has an intake runner that decreases in cross-sectional area as it progresses inward from the entrance to the intake port. The adapter has a runner filler that decreases in cross-sectional area as it extends away from a spacer, and is inserted into the intake runner. The volume of the runner filler is smaller than the volume of the intake runner, so a cavity is left within the intake runner. This cavity forms a portion of the intake passageway that leads from the carburetor to the cylinder. The position of the intake position may be altered to accommodate clearance problems with devices in which an engine is incorporated.

Claims

1. A cylinder head assembly for an internal combustion engine comprising:

an intake port;

an intake runner that receives at least one of air and fuel, said intake runner including;

an entrance;

a section having a first end nearer said entrance and having a second end nearer said intake port;

an adapter having a runner filler disposed within said intake runner; and

an intake passageway having a substantially uniform cross-sectional area created at least in part by said runner filler.

2. A cylinder head assembly according to claim 1, wherein the cross-sectional area of said intake runner decreases from said entrance to said intake port.

3. A cylinder head assembly according to claim 1, wherein said intake runner includes:

an inclined surface with a semi-circular cross section; and

a straight surface with the shape of an interior surface of a segmented cylinder.

4. A cylinder head assembly according to claim 1, wherein said runner filler has a contact surface with the shape of an exterior surface of a segmented cylinder.

5. A cylinder head assembly according to claim 1, wherein said intake passageway is formed by said section and said runner filler.

6. A cylinder head assembly according to claim 1, wherein said entrance is elliptical in shape.

7. A cylinder head assembly according to claim 1, wherein said entrance has a height dimension and a width dimension, said height dimension being greater than said width dimension.

8. A cylinder head assembly according to claim 7, wherein a line including said height dimension is substantially transverse to a longitudinal axis of a piston cylinder.

9. A cylinder head assembly according to claim 7, wherein a line including said height dimension is substantially parallel to a longitudinal axis of a piston cylinder.

10. A cylinder head assembly according to claim 1, wherein said entrance is substantially circular in shape.

11. A cylinder head assembly according to claim 1, wherein said entrance has a height dimension and a width dimension, said height dimension being substantially the same as said width dimension.

12. A cylinder head assembly according to claim 1, wherein said cylinder head assembly includes a cylinder head, and said adapter thermally insulates a carburetor from said cylinder head.

13. A cylinder head assembly according to claim 12, wherein said adapter has a spacer that thermally insulates a carburetor from said cylinder head.

14. A cylinder head assembly according to claim 1, wherein said adapter has a substantially cylindrical inlet.

15. A cylinder head assembly according to claim 1, wherein said intake passageway has a portion that is completely formed by said runner filler.