Spark ignition engine

Patent metadata

Field	Value
Publication number	US-11274627-B2
Application number	US-202017096933-A
Country	US
Kind code	B2
Filing date	Nov 12, 2020
Priority date	Dec 20, 2019
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

A cylindrical part capable of supporting an ignition-coil-integrated plug cap is formed on a head cover so as to correspond to a plug hole of a cylinder head. The cylindrical part is formed by fitting and fixing a pipe material to a mounting hole part formed in the head cover, the mounting hole part facing the plug hole.

First claim

What is claimed is:

1. A spark ignition engine comprising a cylindrical part capable of supporting a plug cap connected to an ignition coil, the cylindrical part being formed on a flange part of a head cover so as to correspond to a plug hole of a cylinder head,
wherein the flange part is a portion covering the plug hole in the cylinder head and is formed continuously to a side of a main cover part that covers a valve operating mechanism.

2. The spark ignition engine according to claim 1 , wherein the cylindrical part is formed by fitting and fixing a pipe material to a mounting hole part formed in the head cover, the mounting hole part facing the plug hole.

3. The spark ignition engine according to claim 2 , wherein the pipe material is inserted into the mounting hole part by press fitting.

4. The spark ignition engine according to claim 1 , further comprising a fixing unit that prevents the plug cap supported by the cylindrical part from being detached from the cylindrical part, the fixing unit being provided on an outer wall of a valve operating mechanism housing part of the head cover.

5. The spark ignition engine according to claim 2 , further comprising a fixing unit that prevents the plug cap supported by the cylindrical part from being detached from the cylindrical part, the fixing unit being provided on an outer wall of a valve operating mechanism housing part of the head cover.

6. The spark ignition engine according to claim 3 , further comprising a fixing unit that prevents the plug cap supported by the cylindrical part from being detached from the cylindrical part, the fixing unit being provided on an outer wall of a valve operating mechanism housing part of the head cover.

7. The spark ignition engine according to claim 4 , wherein
the plug cap is an ignition-coil-integrated plug cap having an ignition coil, and
the fixing unit includes a female screw part for screwing a coil housing part of the ignition-coil-integrated plug cap supported by the cylindrical part, the female screw part being formed on the outer wall.

8. The spark ignition engine according to claim 5 , wherein
the plug cap is an ignition-coil-integrated plug cap having an ignition coil, and
the fixing unit includes a female screw part for screwing a coil housing part of the ignition-coil-integrated plug cap supported by the cylindrical part, the female screw part being formed on the outer wall.

9. The spark ignition engine according to claim 6 , wherein
the plug cap is an ignition-coil-integrated plug cap having an ignition coil, and
the fixing unit includes a female screw part for screwing a coil housing part of the ignition-coil-integrated plug cap supported by the cylindrical part, the female screw part being formed on the outer wall.

10. The spark ignition engine according to claim 7 , further comprising a bracket screwed to the coil housing part, the bracket being bolted to the female screw part.

11. The spark ignition engine according to claim 8 , further comprising a bracket screwed to the coil housing part, the bracket being bolted to the female screw part.

12. The spark ignition engine according to claim 9 , further comprising a bracket screwed to the coil housing part, the bracket being bolted to the female screw part.

13. The spark ignition engine according to claim 1 , further comprising a head cover gasket provided between the cylinder head and the head cover, the head cover gasket being formed with a punch hole corresponding to the plug hole.

14. The spark ignition engine according to claim 2 , further comprising a head cover gasket provided between the cylinder head and the head cover, the head cover gasket being formed with a punch hole corresponding to the plug hole.

15. The spark ignition engine according to claim 3 , further comprising a head cover gasket provided between the cylinder head and the head cover, the head cover gasket being formed with a punch hole corresponding to the plug hole.

16. The spark ignition engine according to claim 4 , further comprising a head cover gasket provided between the cylinder head and the head cover, the head cover gasket being formed with a punch hole corresponding to the plug hole.

17. The spark ignition engine according to claim 5 , further comprising a head cover gasket provided between the cylinder head and the head cover, the head cover gasket being formed with a punch hole corresponding to the plug hole.

18. The spark ignition engine according to claim 6 , further comprising a head cover gasket provided between the cylinder head and the head cover, the head cover gasket being formed with a punch hole corresponding to the plug hole.

19. The spark ignition engine according to claim 7 , further comprising a head cover gasket provided between the cylinder head and the head cover, the head cover gasket being formed with a punch hole corresponding to the plug hole.

20. The spark ignition engine according to claim 8 , further comprising a head cover gasket provided between the cylinder head and the head cover, the head cover gasket being formed with a punch hole corresponding to the plug hole.

Assignees

• Kubota Kk

Inventors

• Isoshima Hiroaki
• Kawasaki Takeshi
• Yamada Yuichiro

Classifications

• F02F1/242 Primary

  Arrangement of spark plugs or injectors · CPC title

• F02F11/002

  involving cylinder heads · CPC title

• F02P3/02

  having inductive energy storage, e.g. arrangements of induction coils {(ignition coils structurally combined with sparking plugs F02P13/00; constructional details of ignition coils H01F38/12)} · CPC title

• F02P13/00 Primary

  Sparking plugs structurally combined with other parts of internal-combustion engines ({connection of ignition coil to spark plug connector F02P3/02;} with fuel injectors F02M57/06 {; spark plug connector per se H01T13/04 – H01T13/06; predominant aspects of sparking plug, see H01T13/40 – H01T13/44}) · CPC title

• F02F7/006

  Camshaft or pushrod housings · CPC title