# US 12,215,649 B2 · Composite cylinder block

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- Number: US 12,215,649 B2
- Document ID: US12215649B2
- Status: Granted
- Kind: B2
- Application number: 18/702,952
- Filed: 2021-10-22
- Published: 2024-12-19
- Granted: 2025-02-04
- Earliest claimed: 2021-10-22
- Assignees: Nissan Motor Co., Ltd.
- Applicants: Nissan Motor Co., Ltd.
- Inventors: Norikatsu Sekine
- Web page: https://patentgrep.com/patent/US12215649B2

## CPC

- F02F 1/10: for liquid cooling
- F02F 7/0085: {Materials for constructing engines or their parts}
- F02F 2007/0063: {Head bolts; Arrangements of cylinder head bolts}
- F05C 2225/00: Synthetic polymers, e.g. plastics; Rubber
- F02F: CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F05C: INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES

## Abstract

A cylinder block (1) includes a main block body (2) made of a metal material and an outer member (3) made of a resin material and welded to the main block body (2). The main block body (2) has a cylinder wall (13) defining therein a cylinder bore (16) and a second columnar part (14B) formed at a position apart from the cylinder wall (13). The outer member (3) has a second columnar part insertion hole (53) and defines a water jacket between the outer member (3) and the cylinder wall (13). The second columnar part (14B) is placed in the second columnar part insertion hole (53) with a predetermined clearance left between the second columnar part insertion hole (53) and the second columnar part (14B), in a state of being isolated from the water jacket, and extends to a cylinder head.

## Claims

### Claim 1

A composite cylinder block, comprising: a main block body made of a metal material; and an outer member made of a resin material and welded to the main block body,
the main block body having a cylinder wall defining therein a cylinder bore and a columnar part formed at a position apart from the cylinder wall,
the outer member being arranged to define a water jacket between the cylinder wall and the outer member, and
the columnar part having formed therein a bolt hole or an oil passage, being placed in the outer member with a predetermined clearance left between the outer member and the columnar part, in a state of being isolated from the water jacket, and extending to a cylinder head.

### Claim 2 (depends on 1)

The composite cylinder block according to claim 1,
wherein the columnar part function as a bolt boss having the bolt hole into which a cylinder head bolt for fixing the cylinder head is screwed.

### Claim 3 (depends on 1)

The composite cylinder block according to claim 1,
wherein the columnar part has formed therein the oil passage for supplying pressurized oil to the cylinder head.

### Claim 4 (depends on 1)

The composite cylinder block according to claim 1,
wherein the columnar part comprises: a main columnar portion formed to function as a bolt boss having the bolt hole into which a cylinder head bolt for fixing the cylinder head is screwed; and a sub columnar portion formed integral with the main columnar part and having formed therein the oil passage for supplying pressurized oil to the cylinder head.

### Claim 5 (depends on 4)

The composite cylinder block according to claim 4,
wherein the columnar part has a pair of recessed gaps between outer circumferential surfaces of the main and sub columnar portions.