Internal combustion engine

Patent metadata

Field	Value
Publication number	US-9334829-B2
Application number	US-201213603625-A
Country	US
Kind code	B2
Filing date	Sep 5, 2012
Priority date	Sep 29, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

An internal combustion engine can include a first ignition plug disposed on the inner side of a range surrounded by a plurality of intake valves and a plurality of exhaust valves with a cylinder head viewed in parallel to a cylinder axial line and standing uprightly along the cylinder axial line. A second ignition plug is inclined with respect to the cylinder axial line on the outer side of the range. The second ignition plug is disposed on the opposite side to a valve driving mechanism with respect to the cylinder axial line on the outer side of the range.

First claim

The invention claimed is:

1. An internal combustion engine of the overhead valve type in which a plurality of intake valves and a plurality of exhaust valves disposed in an opposing relationship to a piston are disposed on opposite sides between which a plane passing a cylinder axial line of a cylinder head is sandwiched, said engine comprising:
a first ignition plug disposed on an inner side of an area surrounded by the plurality of intake valves and the plurality of exhaust valves with said cylinder head viewed in parallel to the cylinder axial line and standing uprightly along the cylinder axial line; and
a second ignition plug inclined with respect to the cylinder axial line on an outer side of the area,
wherein said second ignition plug is disposed on one side of the engine with respect to the cylinder axial line on the outer side of the area, and a camshaft is entirely disposed on a second side of the engine with respect to the cylinder axial line opposite the second ignition plug.

2. The internal combustion engine according to claim 1 ,
wherein the cylinder axial line is inclined with respect to a vertical direction, and
wherein said cylinder head includes a first plug hole which accommodates said first ignition plug therein, a second plug hole which is placed at a lower position in the vertical direction than that of said first plug hole and accommodates said second ignition plug therein, and a communicating passage extending from a bottom portion of said first plug hole to said second plug hole.

3. The internal combustion engine according to claim 1 , further comprising
a first water jacket for cooling in an inside of said cylinder head,
wherein a cooling water passage for communicating said first water jacket of said cylinder head and a second water jacket of a cylinder main body is opened at a portion of a mating face of said cylinder head with said cylinder main body in proximity to said second plug hole.

4. The internal combustion engine according to claim 1 ,
further comprising an intake port configured to communicate two intake downstream side openings, which are opened and closed by said plurality of intake valves, and
a single intake upstream side opening to which an intake system part is connected,
wherein said intake port offsets a first center position of said intake upstream side opening to said second ignition plug side in one direction of a cylinder leftward and rightward direction of said intake downstream side openings with respect to a second center position between said intake downstream side openings in the one direction of the cylinder leftward and rightward direction with said cylinder head viewed in parallel to the cylinder axial line.

5. The internal combustion engine according to claim 1 , wherein said second ignition plug is configured to ignite after ignition of said first ignition plug at one combustion step.

6. An internal combustion engine, comprising:
first ignition means for igniting a mixture, said first ignition means disposed on an inner side of an area surrounded by a plurality of intake valves and a plurality of exhaust valves in a cylinder head viewed in parallel to a cylinder axial line, wherein the plurality of intake valves and plurality of exhaust valves are disposed in an opposing relationship to a piston, and are disposed on opposite sides between which a plane passing a cylinder axial line is sandwiched, said first ignition means disposed upright along the cylinder axial line; and
second ignition means inclined with respect to the cylinder axial line on an outer side of the area,
wherein said second ignition means is disposed on one side of the engine with respect to the cylinder axial line on the outer side of the area, and a camshaft, for driving the plurality of intake valves and plurality of exhaust valves, is entirely disposed on a second side of the engine with respect to the cylinder axial line opposite the second ignition plug.

7. The internal combustion engine according to claim 6 , wherein the cylinder axial line is inclined with respect to a vertical direction, and
wherein said cylinder head includes a first plug hole for accommodating said first ignition means therein, a second plug hole disposed at a lower position in the vertical direction than that of the first plug hole, said second plug hole for accommodating said second ignition means therein, and a communicating passage extending from a bottom portion of the first plug hole to the second plug hole.

8. The internal combustion engine according to claim 6 , further comprising:
first cooling means for cooling, said first cooling means disposed in an inside of the cylinder head,
wherein water passage means is provide for communicating said first cooling means and a second cooling means of a cylinder main body is opened at a portion of a mating phase of the cylinder head with the cylinder main body in proximity to the second plug hole.

9. The internal combustion engine according to claim 6 ,
further comprising intake means for communicating two intake downstream side openings which are opened and closed by said plurality of intake valves, and
a single intake upstream side opening to which an intake system part is connected,
wherein said intake means offsets a first center position of said intake upstream side opening to said second ignition means in one direction of a cylinder leftward and rightward direction of said intake downstream side openings with respect to a second center position between said intake downstream side openings in the one direction of the cylinder leftward and rightward direction with the cylinder head viewed in parallel to the cylinder axial line.

10. The internal combustion engine according to claim 6 , wherein said second ignition means is configured to ignite after an ignition of said first ignition means at one combustion step.

11. An internal combustion engine, comprising:
a first ignition plug disposed on an inner side of an area surrounded by a plurality of intake valves and a plurality of exhaust valves in a cylinder head viewed in parallel to a cylinder axial line, wherein the plurality of intake valves and plurality of exhaust valves are disposed in an opposing relationship to a piston, and are disposed on opposite sides between which a plane passing a cylinder axial line is sandwiched, said first ignition plug being disposed upright along the cylinder axial line; and
a second ignition plug inclined with respect to the cylinder axial line on an outer side of the area,
wherein said second ignition plug is disposed on one side of the engine with respect to the cylinder axial line on the outer side of the area, and a camshaft is entirely disposed on a second side of the engine with respect to the cylinder axial line opposite the second ignition plug.

12. The internal combustion engine according to claim 11 , wherein the cylinder axial line is inclined with respect to a vertical direction, and wherein the cylinder head includes a first plug hole for accommodating said first ignition plug therein, and a second plug hole disposed at a lower position in the vertical direction than that of the first plug hole, said second plug hole configured to accommodate the second ignition plug therein, and wherein a communicating passage extends from a bottom portion of the first plug hole to the second plug hole.

13. The internal combustion engine according to claim 11 , further comprising:
a first water jacket configured to cool in an inside of said cylinder head,
wherein a cooling water passage is configured to communicate the first water jacket and a second water jacket of a cylinder main body is opened

Assignees

• Kisaichi Toru
• Yokotani Hitoshi
• Sotani Hiroshi
• Honda Motor Co Ltd

Inventors

• Kisaichi Toru
• Yokotani Hitoshi
• Sotani Hiroshi

Classifications

• F02P15/02

  Arrangements having two or more sparking plugs · CPC title

• F02F1/242 Primary

  Arrangement of spark plugs or injectors · CPC title