Cylinder head and engine block configuration

• US 10,082,100 B2
• Filed: 12/17/2013
• Issued: 09/25/2018
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: Caterpillar Motoren GmbH & Company KG (Caterpillar Incorporated)
• Original Assignee: Caterpillar Motoren GmbH & Company KG (Caterpillar Incorporated)
• Inventors: Langschwager, Ingo
• Primary Examiner(s): Moubry, Grant
• Application Number:
  US14/652,758
• Publication Number:
  US 20150330328A1
• Time in Patent Office: 1,743 Days
• Field of Search: 1231935, 1231933
• CPC Class Codes: F02B 61/04 for driving propellers
• CPC Class Codes: F02B 75/16 Engines characterised by number of cylinders, e.g. single-cylinder engines F02B75/26 takes precedence
• CPC Class Codes: F02F 1/24 Cylinder heads

Abstract

A single-cylinder cylinder head is disclosed. The cylinder head may have a cylinder head body having a gas system side, a pushrod side opposing the gas system side, a circular cylinder closing face with a central injector opening, a pair of inlet openings, and a pair of outlet openings. The cylinder head may have a central injector recess extending through the cylinder head body to the central injector opening. Further, the cylinder head may have a gas inlet channel system and a gas outlet channel system. The cylinder head may also have a pushrod passage extending through the cylinder head body at the pushrod side. In addition, the cylinder head may have a plurality of cylinder mounting holes extending through the cylinder head body in an outer circumferential region of the single-cylinder cylinder head. The cylinder mounting holes may be non-equidistantly arranged around the central injector recess.

Claims

1. A single-cylinder cylinder head for mounting onto one of multiple cylinder sections of an engine, comprising:

a cylinder head body having

a gas system side,

a pushrod side opposing the gas system side, and

a circular cylinder closing face with a central injector opening, a pair of inlet openings, and a pair of outlet openings,

wherein the central injector opening is disposed centrally in the circular cylinder closing face and a central axis passes through the central injector opening from the gas system side to the pushrod side, and the pair of outlet openings and the pair of inlet openings are arranged on opposing sides with respect to the central axis;

a central injector recess extending through the cylinder head body to the central injector opening;

a gas inlet channel system extending from the gas system side through the cylinder head body to the pair of inlet openings;

a gas outlet channel system extending from the pair of outlet openings through the cylinder head body to the gas system side;

a pushrod passage extending through the cylinder head body at the pushrod side; and

in total exactly five cylinder mounting holes extending through the cylinder head body in an outer circumferential region of the single-cylinder cylinder head,

wherein the cylinder mounting holes are non-equidistantly arranged around the central injector recess,

wherein the in total exactly five cylinder mounting holes includes a first cylinder mounting hole, a second cylinder mounting hole, a third cylinder mounting hole, a fourth cylinder mounting hole, and a fifth cylinder mounting hole such that

the first cylinder mounting hole is disposed between the gas inlet channel system and the gas outlet channel system at the gas system side,

the second cylinder mounting hole and the third cylinder mounting hole are disposed on opposing sides with respect to the central axis at the gas system side, and

the fourth cylinder mounting hole and the fifth cylinder mounting hole are disposed on opposing sides with respect to the central axis at the pushrod side.

2. The single-cylinder cylinder head of claim 1, wherein

the cylinder mounting holes are non-equidistantly arranged with respect to each other, and

the cylinder mounting holes are non-equidistantly arranged with respect to the central injector recess.

3. The single-cylinder cylinder head of claim 1, wherein an arc angle (α

) with respect to the central injector recess at the gas system side between the first cylinder mounting hole and the second cylinder mounting hole is greater than an arc angle (β

) with respect to the central injector recess at the gas system side between the first cylinder mounting hole and the third cylinder mounting hole.

4. The single-cylinder cylinder head of claim 3, wherein the arc angle (a) ranges between 45°

to 90°

.

5. The single-cylinder cylinder head of claim 1, wherein the fourth cylinder mounting hole and the fifth cylinder mounting hole are arranged on opposing sides with respect to the central axis such that a component accommodation space is provided at the pushrod side between the pushrod passage, the gas inlet channel system, the gas outlet channel system, the fourth cylinder mounting hole, and the fifth cylinder mounting hole.

6. The single-cylinder cylinder head of claim 5, further comprising:

at least one component recess provided in the component accommodation space and connected to a component opening in the circular cylinder closing face; and

a fuel channel system at least partially provided within the component accommodation space.

7. The single-cylinder cylinder head of claim 1, wherein

the first cylinder mounting hole and the second cylinder mounting hole are positioned on either side of the gas inlet channel system, and

the first cylinder mounting hole and the third cylinder mounting hole are positioned on either side of the gas outlet channel system.

8. The single-cylinder cylinder head of claim 1, wherein each cylinder mounting hole of the in total exactly five cylinder mounting holes has a cylinder mounting hole diameter ranging between 30 mm to 60 mm.

9. The single-cylinder cylinder head of claim 1, wherein an arc angle (γ

) with respect to the central injector recess at the gas system side between the second cylinder mounting hole and the third cylinder mounting hole is greater than an arc angle (δ

) with respect to the central injector recess at the pushrod side between the fourth cylinder mounting hole and the fifth cylinder mounting hole.

10. The single-cylinder cylinder head of claim 1, wherein an arc angle (ε

) with respect to the central injector recess from the gas system side to the pushrod side between the second cylinder mounting hole and the fourth cylinder mounting hole is greater than an arc angle (ζ

) with respect to the central injector recess from the pushrod side to the gas system side between the fifth cylinder mounting hole and the second cylinder mounting hole.

11. An engine comprising:

an engine block having a plurality of cylinder sections, each cylinder section of the plurality of cylinder sections having in total exactly five cylinder head mounting structures; and

a plurality of single-cylinder cylinder heads, each single-cylinder cylinder head of the plurality of single-cylinder cylinder heads including in total exactly five cylinder mounting holes,

wherein each single-cylinder cylinder head is mounted onto a respective cylinder section of the engine block via mounting members connecting the cylinder mounting holes of a respective single-cylinder cylinder head to the cylinder head mounting structures of a respective cylinder section of the engine block,

wherein each single-cylinder cylinder head includes;

a cylinder head body having a gas system side, a pushrod side opposing the gas system side, a circular cylinder closing face with a central injector opening, a pair of inlet openings, and a pair of outlet openings,

wherein the central injector opening is disposed centrally in the circular cylinder closing face and a central axis passes through the central injector opening from the gas system side to the pushrod side, and the pair of outlet openings and the pair of inlet openings are arranged on opposing sides with respect to the central axis;

a central injector recess extending through the cylinder head body to the central injector opening;

a gas inlet channel system extending from the gas system side through the cylinder head body to the pair of inlet openings;

a gas outlet channel system extending from the pair of outlet openings through the cylinder head body to the gas system side; and

a pushrod passage extending through the cylinder head body at the pushrod side;

wherein the in total exactly five cylinder mounting holes extend through the cylinder head body in an outer circumferential region of the single-cylinder cylinder head, and

wherein the in total exactly five cylinder mounting holes are non-equidistantly arranged around the central injector recess, and

wherein the in total exactly five cylinder mounting holes include a first cylinder mounting hole, a second cylinder mounting hole, a third cylinder mounting hole, a fourth cylinder mounting hole, and a fifth cylinder mounting hole such that

the first cylinder mounting hole is disposed between the gas inlet channel system and the gas outlet channel system at the gas system side,

the second cylinder mounting hole and the third cylinder mounting hole are disposed on opposing sides with respect to the central axis at the gas system side, and

the fourth cylinder mounting hole and the fifth cylinder mounting hole are disposed on opposing sides with respect to the central axis at the pushrod side.

12. The engine of claim 11, wherein

the cylinder mounting holes are non-equidistantly arranged with respect to each other, and

the cylinder mounting holes are non-equidistantly arranged with respect to the central injector recess.

13. The engine of claim 11, wherein

the plurality of cylinder sections includes a first cylinder section and a second cylinder section,

the in total exactly five cylinder head mounting structures of the first cylinder section is a first set of cylinder head mounting structures,

the in total exactly five cylinder head mounting structures of the second cylinder section is a second set of cylinder head mounting structures, and

a first circle passing through at least one cylinder head mounting structure of the first set of cylinder head mounting structures overlaps with a second circle passing through at least one cylinder head mounting structure of the second set of cylinder head mounting structures.

14. The engine of claim 11, wherein the in total exactly five cylinder head mounting structures of each cylinder section are non-equidistantly arranged with respect to each other, and

the in total exactly five cylinder head mounting structures of each cylinder section are non-equidistantly arranged with respect to the corresponding cylinder bore.

15. The engine of claim 11, wherein each cylinder section further comprises a gas system side and a pushrod side opposing the gas system side,

wherein the in total exactly five cylinder head mounting structures for each cylinder section includes a first cylinder head mounting structure, a second cylinder head mounting structure, a third cylinder head mounting structure, a fourth cylinder head mounting structure, and a fifth cylinder head mounting structure,

wherein the first cylinder head mounting structure, the second cylinder head mounting structure, and the third cylinder head mounting structure are disposed at the gas system side, and the first cylinder head mounting structure is arranged between the second cylinder head mounting structure and the third cylinder head mounting structure,

wherein the fourth cylinder head mounting structure and the fifth cylinder head mounting structure are disposed at the pushrod side, and

wherein at least one of

a first arc angle with respect to the cylinder bore at the gas system side between the first cylinder head mounting structure and the second cylinder head mounting structure is greater than a second arc angle with respect to the cylinder bore at the gas system side between the first cylinder head mounting structure and the third cylinder head mounting structure,

a third arc angle with respect to the cylinder bore at the gas system side between the second cylinder head mounting structure and the third cylinder head mounting structure is greater than a fourth arc angle with respect to the cylinder bore at the pushrod side between the fourth cylinder head mounting structure and the fifth cylinder head mounting structure, and

a fifth arc angle with respect to the cylinder bore from the gas system side to the pushrod side between the second cylinder head mounting structure and the fourth cylinder head mounting structure is greater than a sixth arc angle with respect to the cylinder bore from the pushrod side to the gas system side between the fifth cylinder head mounting structure and the second cylinder head mounting structure.

16. The engine block of claim 11, each cylinder head mounting structure of the in total exactly five cylinder head mounting structures is configured to receive a head bolt or a head stud.